Finally made a Nitrous pass! I'm smiling :-) [Archive] - Chevelle Tech

: Finally made a Nitrous pass! I'm smiling :-)


Ron454
Sep 15th, 07, 2:41 AM
So after all my trials, tribulations, woes, whining and asking for advice, I finally made it to the track to find out how it worked.

First pass, on the motor...the throttle hung after the burnout. Found a tail from a wire tie wedged in the secondary throttle plates which of course fell into the intake while we were poking around. (better grab the free end of those buggers when clipping from now on!)

Second pass on the motor to see how the track was. 10.12 @ 131.6. Track good! Air bad...humid and low barometer. I checked.

Third pass....turned the bottle on and went for it. I wasn't going to purge it, but I did. Wasn't going to floor it off the line......but I did. It's set up on a full throttle switch.

Cut an 07 light and yee haw! Tires stuck like glue. Front end came way up.....shifted, pulled hard, shifted and ran it to the finish line. So much for an 1/8 mile pass. It was the last of the night anyway due to noise limits for the louder cars.

The thing was clean to the end. I knew it was good........

Pick up the ticket and the gal says I have to go to tech. (I forgot to put up the window net.)

The numbers?

1.37 60 ft
6.05 1/8 mile @ 113
9.53 1/4 mile @ 140.49

So 6 tenths and 8mph from a 100 shot. Based on the motor run previously tonight.

Pump gas in the tank, set the timing retard to 4 degrees, and I drove it home.

I'm impressed!

BTW....there is a story about a turbo Dodge mini van in the mix....I'll let Natural Born Killer tell ya.

Can't wait to go out tomorrow!

Ron

69 Ratt Vette
Sep 15th, 07, 3:15 AM
That nitrous stuff is fun huh ?? your hooked now !!

Ron454
Sep 15th, 07, 3:34 AM
That nitrous stuff is fun huh ?? your hooked now !!


Well, you called it...except for hitting the fives in the 1/8.....
I'm telling you, I listened to your advice. So thanks.

Need to look at the plugs....but I'm sure they are fine.
Tomorrow, I'll make a pass or 2 at 100hp, and change the jets to 150 and see. Maybe 9.20's?
I'll put the new plugs in. And make sure the fuel pressure is ok with the bigger jet.
I ran the pressure flowed through the jet at 6.5psi. Edel said 6-7psi.

It was a rush for sure, the motor has never sounded cleaner.....

I'll need a 12 step program in the future.......

Ron

JIM
Sep 15th, 07, 6:50 AM
:eek: Holy ^#*!. Mid 9's in a pump gas street driven car! Wow!
Dude, if you get anywhere near a 9.20.......don't try to tell me 8's won't be on your mind. Is your car certified for that level?

forcd ind
Sep 15th, 07, 7:49 AM
pretty cool-i know your looking for those 150 h/p jets now-lol

Shawn Gilbert
Sep 15th, 07, 9:22 AM
Holy ****!!!!!its on baby!!!!!

glad everything worked out so well. Cant wait to hear future exploits.......

69 Ratt Vette
Sep 15th, 07, 9:38 AM
Well, you called it...except for hitting the fives in the 1/8.....
I'm telling you, I listened to your advice. So thanks.

Need to look at the plugs....but I'm sure they are fine.
Tomorrow, I'll make a pass or 2 at 100hp, and change the jets to 150 and see. Maybe 9.20's?
I'll put the new plugs in. And make sure the fuel pressure is ok with the bigger jet.
I ran the pressure flowed through the jet at 6.5psi. Edel said 6-7psi.

It was a rush for sure, the motor has never sounded cleaner.....

I'll need a 12 step program in the future.......

Ron

Ya, I missed it by .05............then again you only made one pass and I was going off your best et in your sig.

What are the sizes of the jets ?? both nitrous and fuel. Most systems are jetted rich for "safety" Once you are running nitrous for a while you will end up with both jets the same size at around 5.5-6lbs. flowing fuel pressure.

Learn how to read nitrous plugs, take small steps and have fun.

Doug F.
Sep 15th, 07, 11:50 AM
That is really flyin' for a street car. Nice job!

Ron454
Sep 15th, 07, 1:23 PM
:eek: Holy ^#*!. Mid 9's in a pump gas street driven car! Wow!
Dude, if you get anywhere near a 9.20.......don't try to tell me 8's won't be on your mind. Is your car certified for that level?


Yes, the car is certified to 8.50. Below that you need a funny car type cage. I'm not that ambitious!

Thanks,

Ron

OutCast
Sep 15th, 07, 1:30 PM
Sounds like it was well worth the grief. Way to go Ron !!!!

Ron454
Sep 15th, 07, 1:32 PM
Ya, I missed it by .05............then again you only made one pass and I was going off your best et in your sig.

What are the sizes of the jets ?? both nitrous and fuel. Most systems are jetted rich for "safety" Once you are running nitrous for a while you will end up with both jets the same size at around 5.5-6lbs. flowing fuel pressure.

Learn how to read nitrous plugs, take small steps and have fun.

I was giving you krap on missing the 1/8 mile number!
The time in the sig is with the 4.10 gears. Since switching to 3.73's, replacing the trans and adding the beefier drive shaft, 10.01 has been the best....and that was in stellar air. 10.10 is now pretty much the norm. The previous 9.91 was also in stellar air.

Nitrous jet is a 57. Fuel jet is a 63. I was running 6.5psi flowed.
I did look at one plug last night after I posted.....looks perfect. But then that is after the drive home. I'll look at them all today.....but I doubt there will even be an issue. Still running the extended tip plugs btw......

The 150 jets will be 71/75.....if I decide to try that tonight.

Thanks,

Ron

With one whole run under my belt.....I have a lot to learn.

2k3Chevelle468
Sep 15th, 07, 1:39 PM
Congrats!

Wolfplace
Sep 15th, 07, 1:54 PM
Are we havin fun yet,,, :D :D

More power,,,,
If a little good,,,
More is better
Too much is just right,,, :cool:

Congratulations Ron :beers:

undee70ss
Sep 15th, 07, 2:04 PM
Pump gas in the tank, set the timing retard to 4 degrees, and I drove it home.

I'm impressed!


So am I, congrats.

Rowdy
Sep 15th, 07, 2:45 PM
What, no cameras in the Pacific Northwest?

How long did you procrastinate before changing your rear gear? I know it's hard to spend towards slower E.T.'s, but the drive to and from the track is probably a heck of alot more pleasant. The juice certainly makes that decision a bit easier to live with.

Here's to better air tonite!!!

10secBu
Sep 15th, 07, 3:49 PM
Ughh...us N/A guys lost another to the bottle. ;):D

Impressive pickup for the very first run and no tuning made. I'd imagine there's alot left with more tuning in terms of fuel pressure, etc.

Ron454
Sep 15th, 07, 5:10 PM
Ughh...us N/A guys lost another to the bottle. ;):D

Impressive pickup for the very first run and no tuning made. I'd imagine there's alot left with more tuning in terms of fuel pressure, etc.

So let's get something straight here.....I've been a staunch N/A guy forever.
But.....at the least, now I know how your car feels! (And I love your car)
I'd really rather have a 565 N/A that does the same thing. But that would be starting from scratch and would cost me way more than 10K to get there.
Your car wins in my book, cause now I'm cheating!
I have no idea where this will all lead. But I'm going to have some fun.

We have our final heads up race next weekend at the track 50 miles south. Too bad the #1 turbo guy won't be there......I might have been able to scare him just a little. He has run 8.99.....
That will be the last race of the season for me. Our track is closing for repaving....over a month early. We will be missing the best air of the year....same air I managed the 9.91 N/A in last year.

Ron

69 Ratt Vette
Sep 15th, 07, 5:27 PM
I could never understand how nitrous is cheating when no one says that about any other powers adders ?? I know you are just kidding, but I hear that all the time. It would not be cheating unless you run a class that is NA, or lie about it.

As for your NA 565, how about a 565 with nitrous.

Have fun with it. BTW, you can not do any kind of real plug check after you drive the car home. If you are serious about playing with this new found HP, learn how to read a nitrous plug. It is not "free" HP, and is addicting. Since your track is closing go hit it with some 150-200 jets and then over the winter learn how to run nitrous without hurting stuff. As long as you have forged pistons, a good fuel system, and a little extra gap in the rings a big block can run 300 hp worth pretty easy.

blazerbob
Sep 15th, 07, 5:39 PM
Ron, I said you would run in the 50's and you made it! Congrats!
Bring it on some more!

Bob

Ron454
Sep 15th, 07, 5:55 PM
I could never understand how nitrous is cheating when no one says that about any other powers adders ?? I know you are just kidding, but I hear that all the time. It would not be cheating unless you run a class that is NA, or lie about it.

As for your NA 565, how about a 565 with nitrous.

Have fun with it. BTW, you can not do any kind of real plug check after you drive the car home. If you are serious about playing with this new found HP, learn how to read a nitrous plug. It is not "free" HP, and is addicting. Since your track is closing go hit it with some 150-200 jets and then over the winter learn how to run nitrous without hurting stuff. As long as you have forged pistons, a good fuel system, and a little extra gap in the rings a big block can run 300 hp worth pretty easy.

Yeah, kidding about cheating. My cohorts can't make that claim, cause they have been on the spray for some time. I wanted to hit nines NA and go from there.

I was waiting for the 565 on spray comment! Ha!
Remember that I only have 9" tires.....at some point, they will be overwhelmed. But I think they will work at 150.

Totally understand about the plug check. I was really looking for signs of detonation, burned electrodes and the like. At least the car runs them clean enough on the drive home that I can see all that stuff.

The ring gap is all that I don't have. We never set it up for the bottle. But over the winter, it will be time to freshen it after 3 years, and we can change that. Even add some better parts if need be. My engine builder still thinks I'm nuts....

Ron

40Coupe
Sep 15th, 07, 9:12 PM
Very nice gain from a 100 shot! I'm staying the N/A course myself. Do keep us posted on your progress.

69 Ratt Vette
Sep 15th, 07, 9:17 PM
Why would your engine builder think you are nuts ?? I don't get the "black magic" thing associated with nitrous, particularly with an experienced engine builder. It is nothing more than additional air fuel mixture in the combustion chamber, just like any other power adder.

A 9 in. slick ? time for a progressive, good rings and 8's are right around the corner.

What is the basic motor build and fuel system?

10secBu
Sep 15th, 07, 9:18 PM
I gotta admit I've been tempted to try spraying my car from time to time. A couple things keeping me from trying are the cost as Ron has discovered isn't as cheap as some lead you to think. I'd say from the research I did your looking at a good $1500 investment to be ready to run.

Second thing is my car is very much N/A setup in terms of gear ratio and converter. I'd have to take gear out and put a tighter converter in which again adds to the cost and work to convert just to try spraying. Not worth it to me at this time. Maybe someday, but not any time soon that I can see.

For a car like Ron's that's driven with a tighter converter to begin with, spray makes alot of sense as a nitrous combination is definately more streetabe when the bottles off due to less gear and a tight converter. Fast N/A combinations start to get quite radical and not streetable at all once you reach the 9 second range.

joespanova
Sep 15th, 07, 11:37 PM
You're gonna' have to get that thing in the 8 eighties if you want to weed out the sarcasm and comments about NA and all that BS...........HOWEVER...........that being said if you're happy thats all that matters..........fun ,none the less. Go for broke now! :D

Ron454
Sep 16th, 07, 2:18 AM
Why would your engine builder think you are nuts ?? I don't get the "black magic" thing associated with nitrous, particularly with an experienced engine builder. It is nothing more than additional air fuel mixture in the combustion chamber, just like any other power adder.

A 9 in. slick ? time for a progressive, good rings and 8's are right around the corner.

What is the basic motor build and fuel system?


Well, he worries about the piston quality and the wrist pin quality. I have SRP parts in the engine. He thinks the top ring needs to be further down the piston....and the wrist pins need to be heavy wall. I think the SRP pistons already have the top ring down aways. Don't have a clue about the wrist pins.

Basic motor is a 496, above mentiond pistons, Manley 4340 I beam rods, Scat 4340 crank. AFR heads, Comp roller 260/266 on 110 lobe sep. Dominator, Brodix intake etc.

Fuel system for the motor is a Mallory 140 full return setup. For the nitrous I have a Holley blue dead head setup.

I didn't get to run tonight. Took me over an hour to get in the gate, so I decided not to bother for 1 run. So next weekend...at the other track.

And yup, 9" Hoosier radial slicks......awesome tires.

Ron

ProchargerHulk
Sep 16th, 07, 8:50 AM
Not sure how much Nitrous you plan to run but I was only able to run a 250 shot before the Holley blue pump was to small.


A buddy used to run a goodyear 9x28 slick. He ran in the high 8s but it was a SCARY ride.


ProchargerHulk

Ron454
Sep 16th, 07, 11:32 PM
Not sure how much Nitrous you plan to run but I was only able to run a 250 shot before the Holley blue pump was to small.


A buddy used to run a goodyear 9x28 slick. He ran in the high 8s but it was a SCARY ride.


ProchargerHulk


The Holley Blue pump only feeds the plate. I have 2 fuel systems.


Ron

ProchargerHulk
Sep 17th, 07, 7:06 AM
That is the same way mine was. One blue pump just for the nitrous. At around 250 HP the thing would lose fuel pressure down track. Went with two blue pumps just for the nitrous, Problem solve.


ProchargerHulk

Ron454
Sep 17th, 07, 4:07 PM
That is the same way mine was. One blue pump just for the nitrous. At around 250 HP the thing would lose fuel pressure down track. Went with two blue pumps just for the nitrous, Problem solve.


ProchargerHulk

Well, that seems odd, a Holley blue should feed 600hp. But I believe what you say is true.
I'll never get anywhere near 250 shot with this engine. 150 is my self imposed limit.

Thanks,

Ron

blue66
Sep 17th, 07, 4:24 PM
Awesome results Ron,
Can't wait to see the 150 shot times :) !!!

Harold Sutton
Sep 17th, 07, 4:47 PM
That's a really good pick up in E.T. and speed for only a 100 shot. The extra heat is a real concern for the top ring. The Hellfire rings work real good and the gap has to be increased quite a bit. You might consider asking some nitrous guys for their recommendations before spraying over 150 H.P., it's real easy to hurt parts. Most guys running nitrous also change to much wider lobe centers and longer duration exhaust lobes on the cams to keep combustion chamber temperatures down.

Ron454
Sep 17th, 07, 4:54 PM
Unfortunately, Our track is now closed for the year due to repaving.

Might have to wait till next year. I think there is a tenth or more with the 100 horse setting.

Ron

JOHN WILSON
Sep 17th, 07, 5:01 PM
Ron, that's a nice pick up. Looks like trying to keep things civilized/streetable with that somewhat tight converter and mild gears has paid off. :thumbsup:

How far away to the next closest track???

69 Ratt Vette
Sep 17th, 07, 6:15 PM
[150 is my self imposed limit.

Thanks,

Ron[/QUOTE]

Ha ha ha ha ha.......famous last words !!

Ron454
Sep 17th, 07, 6:20 PM
[150 is my self imposed limit.

Thanks,

Ron

Ha ha ha ha ha.......famous last words !![/QUOTE]

I smashed the 200 and 250 jets.......Ok, I didn't.
Next closest track is 50 miles. I used to drive there all the time with the 468. Only been once with the 498.
I may go Sat. I'll know lot's of folks with trailers to haul me home if need be!
It's our last heads up race of the year.

Ron

69 Ratt Vette
Sep 17th, 07, 6:35 PM
Ha ha ha ha ha.......famous last words !!

I smashed the 200 and 250 jets.......Ok, I didn't.
Next closest track is 50 miles. I used to drive there all the time with the 468. Only been once with the 498.
I may go Sat. I'll know lot's of folks with trailers to haul me home if need be!
It's our last heads up race of the year.

Ron[/QUOTE]

A 300 shot is nothing for a big block with decent parts and good rings, nothing. It is hard on driveline parts though.

Natural Born Killer
Sep 18th, 07, 11:15 AM
Ok, Now for the Mini- Van Story. It was one of those ugly older Chrysler products, Silver in color, or was it grey? Anyway the interior was gutted so I knew something was up. Couldnt figure out why it was in the loud car lanes. Both cars pull into the burnout box, but somethings amiss. The Grey car, er MINI VAN, is smoking the wrong set of tires. Oh yeah, thats rigtht, Its a MINI VAN. The drive axle is in the front! I am in my car in the staging lanes, but the drama overwhelms me. I cant stand the excitement any longer as I release my harness and attempt to leap from my car. Ouch! Dang it, I forgot to pull the pin on my swing out bar. I run to the starting line to see the anhialation of the Mopar Product. The yellow lights flash in rapid succession, then Green. Both cars....er, vehicles leap from the line. But wait..only one car actually leaps, the other one simply saunters off the line. Whats this, the mighty Chevy is barely out pacing the MINI VAN in the tower lane. Go RON GO! I yell. Every one is screaming, young women are throwing Bra's and Panties into the air. Go Ron Go they are chanting! But no its not that at all. They are chanting No RON NO! As I scan the area, I spy matching clothing among the crowd. Red hair and missing teeth are on every head, Whats this....Can it be.... Holly cow we are at a Mopar Meet. As the MINI VAN screems to Mid 12s (Believe it or not) Ron holds on for dear life. But then, in a flash of lightening, its over. The tower lane screems to victory and the crowd screems in extacy. A scene worthy of an episode of the Road Warrior. I hang my head in shame, as the only Chevy fan in the crowd. Its a long drive home that night. And even my wife cant comfort me. I make a Zoloft/Prozac coctail and drift off to sleep. To depressed to even shower before climbing into bed. THE END!

Ron454
Sep 18th, 07, 12:37 PM
It was the tie wrap stuck in the secondaries......I swear!
Good story Kelly, I'm cracking up!

BTW....that is the fastest 4cyl Dodge mini van in the country. He ran a 12.05 @ 111 later in the evening.

Ron

Natural Born Killer
Sep 18th, 07, 12:41 PM
Maybe I should take up writing, I may be better at that than I am at racing. Of course, I suck at racing lately so it wouldnt be that hard.

427L88
Sep 18th, 07, 2:39 PM
I was well written!

DAMMIT Ron, I sure wanted to see what the 150 shot would do. Dayng!

thrasher
Sep 18th, 07, 8:18 PM
Ron- Wodburn gets good around this time of the year if it doesn't rain.Might be worth the trip.It's very much a strange area.I've seen it rain at the Golf course and in the farmers field and not touch the track.That was spooky.I've also been there when it was 300 below sea level.People scrambling all day to reset their dial in's.



As I scan the area, I spy matching clothing among the crowd. Red hair and missing teeth are on every head, Whats this....Can it be.... Holly cow we are at a Mopar Meet.



Priceless

Ron454
Sep 19th, 07, 12:51 AM
Well, you must be reasonably local.....

And a fine golf course it is...sand greens and a real chance to hit the drag racers as they approach the track...I always look. (I am a golfer too)

I was there once (at Woodburn, not the golf course) with the 300 ft below air...lasted about an hour, but I set my best ever with the 468 @ 10.90.

I'll be there on Sat. It isn't supposed to rain. And even if the car breaks or whatever, I'll find a ride home.
I will drive it there. I have to drive it there!

Come on down! It's our last HeadsUp NW race of the year. Could be a couple of seven second cars there....

I just might have to give the 150 horse jets a try....

Would love to meet you.

Ron


Priceless[/QUOTE]

[QUOTE=thrasher;1496760]Ron- Wodburn gets good around this time of the year if it doesn't rain.Might be worth the trip.It's very much a strange area.I've seen it rain at the Golf course and in the farmers field and not touch the track.That was spooky.I've also been there when it was 300 below sea level.People scrambling all day to reset their dial in's.

thrasher
Sep 19th, 07, 11:24 PM
Sounds good.If they don't forecast showers or something stupid I might just show as I haven't been there for a while now.

What color is your Nova? How about a description so's I can spot ya.Maybe ya have a current pic you can link me too?
I won't be able to help on the tune as your stuff's way above my mild SB street/strip non NOS junk.

Ron454
Sep 20th, 07, 12:56 AM
Sounds good.If they don't forecast showers or something stupid I might just show as I haven't been there for a while now.

What color is your Nova? How about a description so's I can spot ya.Maybe ya have a current pic you can link me too?
I won't be able to help on the tune as your stuff's way above my mild SB street/strip non NOS junk.

Thus far, the weather is supposed to be perfect. But you know the NW weather guessers...it could change.

The car is a semi med blue metallic with a 5" cowl that has a mono SS white stripe. There won't be that many heads up NW racers, so it won't be hard to spot. I'll be the guy with the wilmar floor jack changing tires around 8AM. We will likely be in lanes 6,7 and 8.

Hope to meet you.

And don't go there wuth the mild SB, non NOS junk. We all do what we do. Within our means. Besides, I'm old......started in the mid 70's with a 68 station wagon. It's all good!

Ron

fast1971chevelle
Sep 20th, 07, 6:05 AM
first of all great run Ron can't wait to see what it does with the 150 shot, and what was the comment about not going there with a mild sb non nos junk????????????? i run a small block 383 with no N.O.S and run 9.70's all day long...... damn haters.....lol........once again good run Ron......................Mike

thrasher
Sep 22nd, 07, 3:53 AM
Well this might be good.
It's not supposed to rain.Partly cloudy with a high of 68.

thrasher
Sep 22nd, 07, 1:21 PM
:( As usual stayed up too late and didn't make it.
As per the weather Channel 10:21 it's 59 degrees with 58% humidity.

thrasher
Sep 22nd, 07, 3:02 PM
12:00 60 degrees 51% humidity
1:15 63 degrees 46% humidity