555" BBC 'pump gas' build - Chevelle Tech
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  #1  
Old Feb 1st, 09, 12:14 AM
helicoil helicoil is offline
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Default 555" BBC 'pump gas' build

This seems to be best '540 BBC' build forum on the net that I can find so what better place is there to add another one. I was led to this site in a search for some info on my 555" one day and have been stuck to it ever since. I am not a Chevelle owner but it seems many are not either. I will post the progresss of my 555" build going together, my dyno results, and then the track times in the car, which BTW is early shoebox Nova.

I have been acquiring parts for several years now for this and many are left over from a blown alcohol 509 BBC effort for a rear engine dragster that I have since sold. I am a little more liberal than most when it comes to what I can street drive. My car does not have P.S. or P.B. and is quite a bit lighter than many so I can get by with some more radical parts, at least IMO. The goal is mid 9's on motor and mid 8's on the N20.

I will try to add lots of pics of my progress starting with these.

Comments or suggestions welcome.









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00 Camaro SS 9.80 et, 3800#, 20+MPG/pump gas
00 Firehawk 28x10.5's, LS6, D1SC, TH400 - 9.20's
66 Nova SS 9.60's, 406/N20, 26x10 ET Streets
66 Outlaw 10.5 Nova 8.0's (2001) 400" 14-71/Inj
555" BBC pump gas - 1234HP

Last edited by helicoil; Feb 1st, 09 at 12:38 AM.
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  #2  
Old Feb 1st, 09, 12:17 AM
cuisinartvette cuisinartvette is offline
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Default Re: 555" BBC 'pump gas' build

Pffft! Whats up with the low-budget stuff man?


Just kiddin, VERY nice pieces you have there. The last pic looks fantastic.
You planning on grinding the stud down where it hangs or leaving as is ?

Keep us posted with more pics!!
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  #3  
Old Feb 1st, 09, 12:21 AM
Jebchevelle Jebchevelle is offline
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Default Re: 555" BBC 'pump gas' build

looks like a nice build.
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  #4  
Old Feb 1st, 09, 12:31 AM
helicoil helicoil is offline
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Default Re: 555" BBC 'pump gas' build

I have some more pics to add. First step was a trial fit of all the components so I wouldn't run into any surprises through the process.
I had a friend bush the lifters and size them to .9045" with his BHJ fixture, no pics of that process taken as it was outside the shop.
Step 1 was size the cylinders so the pistons would fit.
I bored the block to 4.556" and honed it with the ARP studs torqued to 80ft. lbs with Felpro MLS gaskets and some huey alumunium torque plates.
Bore is 4.560" for this build.





Step 2 was line hone the mains as they were .0007" tight




I sized the small ends of the rods to get .001" pin to rod clearance, they came at .0007" out of the box.

__________________
00 Camaro SS 9.80 et, 3800#, 20+MPG/pump gas
00 Firehawk 28x10.5's, LS6, D1SC, TH400 - 9.20's
66 Nova SS 9.60's, 406/N20, 26x10 ET Streets
66 Outlaw 10.5 Nova 8.0's (2001) 400" 14-71/Inj
555" BBC pump gas - 1234HP

Last edited by helicoil; Feb 1st, 09 at 12:43 AM.
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  #5  
Old Feb 1st, 09, 12:42 AM
helicoil helicoil is offline
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Default Re: 555" BBC 'pump gas' build

Yes, the bolt for the rocker stands protrudes into each of the intake ports on all 8 runners. Once I figure the shim thickness necessary for the stands I will torque them in place and go in there with a carbide burr and blend them into the port.

Alot of the pieces are high end, but I didn't buy them all at once. A little here, little there. Many were originally going to be used in a 1500 HP blown alcohol 509. I'm tired of sitting on them, time to put them to use!

Quote:
Originally Posted by 67T56Elky View Post
Pffft! Whats up with the low-budget stuff man?


Just kiddin, VERY nice pieces you have there. The last pic looks fantastic.
You planning on grinding the stud down where it hangs or leaving as is ?

Keep us posted with more pics!!
__________________
00 Camaro SS 9.80 et, 3800#, 20+MPG/pump gas
00 Firehawk 28x10.5's, LS6, D1SC, TH400 - 9.20's
66 Nova SS 9.60's, 406/N20, 26x10 ET Streets
66 Outlaw 10.5 Nova 8.0's (2001) 400" 14-71/Inj
555" BBC pump gas - 1234HP
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  #6  
Old Feb 1st, 09, 12:56 AM
helicoil helicoil is offline
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Default Re: 555" BBC 'pump gas' build

A few more pics of a preliminary mock up.
Miles of rotating clearance in the block. No grinding necessary. Crank e/p was .007". Piston to deck was .004" after square decking the block .015". Looking for a quench of about .045"







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00 Camaro SS 9.80 et, 3800#, 20+MPG/pump gas
00 Firehawk 28x10.5's, LS6, D1SC, TH400 - 9.20's
66 Nova SS 9.60's, 406/N20, 26x10 ET Streets
66 Outlaw 10.5 Nova 8.0's (2001) 400" 14-71/Inj
555" BBC pump gas - 1234HP
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  #7  
Old Feb 1st, 09, 1:18 AM
helicoil helicoil is offline
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Default Re: 555" BBC 'pump gas' build

I installed the Dart 360's to check P to V and rocker geometry, yes I said 360cc heads will be used as they were one of the original items from the blown alcohol build. These are older castings from 1999, but Ron's Porting in St. Louis did them up very nice. Flow numbers on these are better than the current Pro 1 355 CNC models. I will post them later when I have the sheets in front of me. They are BIG, but I have light car and plan to spray a decent amount, I don't think they will hamper my goals, NA or on the bottle.

I have several cams to chose from that I will mention specs on later, still trying to decide what to use. I am using T&D rockers with a 1.8/1.75 combo which will put me at a 'net' lift of approxiamtely .800". I did say my idea of a street driven engine was little different than some didn't I? This is just going to be a toy with most of the emphasis placed on performance, believe it or not, with a budget in mind. I didn't have the luxury to go and buy the latest, greatest heads or build a bigger inch engine on a wim, I have had many of these parts for many years now and it is what it is. I have decided to build this 555" 'pump gas' effort engine.













All in all, everything fits pretty well. I need to clearnace the pushrod holes in the heads to run the 7/16" pushrod tubes, set the rocker stand heights after deciding on the camshaft and do some other little massaging but not as bad as I expected.
__________________
00 Camaro SS 9.80 et, 3800#, 20+MPG/pump gas
00 Firehawk 28x10.5's, LS6, D1SC, TH400 - 9.20's
66 Nova SS 9.60's, 406/N20, 26x10 ET Streets
66 Outlaw 10.5 Nova 8.0's (2001) 400" 14-71/Inj
555" BBC pump gas - 1234HP
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  #8  
Old Feb 1st, 09, 1:25 AM
FourEightyNine FourEightyNine is offline
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Default Re: 555" BBC 'pump gas' build

Very nice helicoil welcome to the site
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  #9  
Old Feb 1st, 09, 2:04 AM
Wolfplace Wolfplace is offline
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Default Re: 555" BBC 'pump gas' build

Very nice,,
Great pics, shows some of the work involved in doing this stuff correctly even with some of the best of parts
They don't exactly fall together

One thing I would be concerned with is those screens, I don't like restricting the return that much but I think I mentioned that on Speedtalk a while back when you were asking about the lifters?

Looks like this is going to be a killer "street deal"
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  #10  
Old Feb 1st, 09, 2:25 AM
540Hotrod 540Hotrod is offline
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Default Re: 555" BBC 'pump gas' build

Going through a very similar build right now. Takes LOTS of time and you have to measure and check everything 3 times at least. Nothing fits the first time around perfectly when it's all new stuff.

Looking forward to the rest of the build and your results!

JIM
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  #11  
Old Feb 1st, 09, 2:48 AM
DragRacer DragRacer is offline
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Default Re: 555" BBC 'pump gas' build

Helicoil,

Very nice build!

I agree with Mike Lewis on the valley screen though.
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  #12  
Old Feb 1st, 09, 2:58 AM
aukai aukai is offline
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Default Re: 555" BBC 'pump gas' build

Makes my Champagne (Thunder bird) budget seem a little reserved.
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Last edited by aukai; Feb 1st, 09 at 3:50 AM.
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  #13  
Old Feb 1st, 09, 8:04 AM
GRN69CHV GRN69CHV is offline
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Default Re: 555" BBC 'pump gas' build

Looks like the exhaust side of those Dart 360's have been worked over a lot. Compared to the exhaust side of my ProOne 310's, those exhaust ports are huge. Thanks for posting/sharing detailed pics. Kind of funny. You are building out 15 CI more displacement for a lite wt car to run in the 9's, I am building a very similiar yet detuned version that I hope to keep down around 625-650HP when done.
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  #14  
Old Feb 1st, 09, 9:46 AM
lemonice lemonice is offline
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Talking Re: 555" BBC 'pump gas' build

hello, what intake is that.? looks like the one that may have (rheer-morrison) cast into it.also are you using the felpro blue gaskets as in the picture or a multi-layer gasket. and last question, did you buy a new dart block, and have to machine on it?
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  #15  
Old Feb 1st, 09, 10:27 AM
Chevelle505cid Chevelle505cid is offline
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Default Re: 555" BBC 'pump gas' build

Sweet Jesus! It's like someone read my mind and nearly assembled my dream engine! Great build! Great Pics! Keep up the good work. Some day when I grow up ( probably after the kids exit college over a decade from now) I would love to do a similar build. I think 9's on grunt and 8's on the hose are going to be pretty darn easy. Sweet, Sweet build!
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