First Passes on Nova with MJ467 - Page 2 - Chevelle Tech
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post #16 of 40 (permalink) Old Apr 9th, 19, 7:31 AM
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Allen
 
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Re: First Passes on Nova with MJ467

Outstanding results, looks like everything in the combo is working well!
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post #17 of 40 (permalink) Old Apr 9th, 19, 9:16 PM
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Re: First Passes on Nova with MJ467

I'm interested in your exhaust system. Mine has held me back quite a bit. I have mentioned in a few other threads that I've seen .35-.37 seconds at different tracks by removing my 3" pipes with Flowmasters and turn downs that dump before the rear end. Typical street trim weight is 3580 and I estimate the exhaust at 55-60 lbs. I run 2 1/8 hooker 2285 headers. the car picked up a bit last year when i went up to the 2285s from some 1 7/8 Flowtech headers.
suspension I have CE 90/10s up front, CE 3 ways out back at 50/50, split monos, cal-trac bars, 1/4 turn of pre-load when the stopper touches the spring.
locally on 3/23/19 I went 10.49 @ 130 in full street trim, got down to 10.12 at 132.5 open header with collector extensions for my EFI. I want to try one more time for 9.9x this weekend before trying an 8" converter.

Bob
1972 Nova
496 AFR315
Straub Custom HR 258/260 108 lsa
MT 255x60x15 drag radials, 1050 CFM 4150 QF/Demon
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60' 1.446 **NEW** 10/24/2018
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post #18 of 40 (permalink) Old Apr 9th, 19, 10:06 PM
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Jon
 
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Re: First Passes on Nova with MJ467

Nice easy 10 second combination.
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post #19 of 40 (permalink) Old Apr 9th, 19, 10:22 PM Thread Starter
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Renzo
 
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Re: First Passes on Nova with MJ467

Quote:
Originally Posted by Supernova72 View Post
I'm interested in your exhaust system. Mine has held me back quite a bit. I have mentioned in a few other threads that I've seen .35-.37 seconds at different tracks by removing my 3" pipes with Flowmasters and turn downs that dump before the rear end. Typical street trim weight is 3580 and I estimate the exhaust at 55-60 lbs. I run 2 1/8 hooker 2285 headers. the car picked up a bit last year when i went up to the 2285s from some 1 7/8 Flowtech headers.
suspension I have CE 90/10s up front, CE 3 ways out back at 50/50, split monos, cal-trac bars, 1/4 turn of pre-load when the stopper touches the spring.
locally on 3/23/19 I went 10.49 @ 130 in full street trim, got down to 10.12 at 132.5 open header with collector extensions for my EFI. I want to try one more time for 9.9x this weekend before trying an 8" converter.
You got me thinking now, .3 seconds is a nice chunk.

I run the cheaper competition hooker headers 2" prim - 3.5" collector. Pypes 3" x-pipe and dynomax ultraflo ovals dumped at the axle (I really like the sound of the system btw, not too loud at idle and at full throttle it has a deep powerful sound).

Suspension I run calvert 90/10s with 165lb santhuff springs 1/2 coil cut off, global west upper a-arms and rear calvert split monos w/ 1" drop, bars at zero gap and no preload, shocks set at 8 (basicallly one click from full hard).

'70 Nova, MJ467, TH400, 9"
Best 1/4: 10.78 @ 124
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post #20 of 40 (permalink) Old Apr 9th, 19, 10:55 PM
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Re: First Passes on Nova with MJ467

What was the advertised HP of the MJ 467? Torque? CR?
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post #21 of 40 (permalink) Old Apr 9th, 19, 11:32 PM Thread Starter
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Re: First Passes on Nova with MJ467

Quote:
Originally Posted by 64tempestwagon View Post
What was the advertised HP of the MJ 467? Torque? CR?
Compression was set around 10.7:1
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'70 Nova, MJ467, TH400, 9"
Best 1/4: 10.78 @ 124
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post #22 of 40 (permalink) Old Apr 9th, 19, 11:54 PM
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Steve
 
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Re: First Passes on Nova with MJ467

What was the DA of the track on that day? Have you run it on a chassis dyno or checked the AFR since putting it in the car? I was surprised to find that putting full exhaust and a very large paper air filter on my engine significantly changed the AFR and power.

'69 Camaro - 429 SBC Dart Iron Eagle 9.325" block, Crower crank, Crower 6" Billet rods, Ross pistons (10:1), Total Seal S/S rings, AFR 245 heads, T&D steel rockers, Cloyes Timing Set, 4-7 swap solid roller 274/286 @ .050", .704" lift, Dart single plane, Dominator EFI, Stef's #1705R pan, F2 Procharger on E85
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post #23 of 40 (permalink) Old Apr 10th, 19, 12:28 AM Thread Starter
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Renzo
 
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Re: First Passes on Nova with MJ467

Quote:
Originally Posted by Steve69SS396 View Post
What was the DA of the track on that day? Have you run it on a chassis dyno or checked the AFR since putting it in the car? I was surprised to find that putting full exhaust and a very large paper air filter on my engine significantly changed the AFR and power.
DA was about 2303 on the first run and over 3000 on the last.

No chassis dyno yet. My afr was 12.3 - 12.8 throughout the first three runs.

I'm running a 14x3 K&N, I removed it on the last run and gave me the fastest mph with the highest DA of all the runs. I haven't checked the afr on that run yet though.

'70 Nova, MJ467, TH400, 9"
Best 1/4: 10.78 @ 124
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post #24 of 40 (permalink) Old Apr 10th, 19, 1:09 AM
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Steve
 
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Re: First Passes on Nova with MJ467

I ask because your MPH is low. In 2014 I ran a 427SBC that made 640HP and 565 torque. In my 3,400 pound '69 Camaro it ran 10.41 at 128 with a 1.5193 sixty foot off the foot brake. This was before I put it on a chassis dyno and found that the 14" X 4" air filter cost 12RWHP and that the AFR was 12.0 now instead of 12.8 on the engine dyno. My combo picked up about 35RWHP but I didn't take it back to the track to see what it picked up. It was setup for nitrous so the ET on the motor wasn't as important. Your engine has a little more HP, even more torque and Nova's are typically lighter than first gen Camaro's, which is why I'm asking.

'69 Camaro - 429 SBC Dart Iron Eagle 9.325" block, Crower crank, Crower 6" Billet rods, Ross pistons (10:1), Total Seal S/S rings, AFR 245 heads, T&D steel rockers, Cloyes Timing Set, 4-7 swap solid roller 274/286 @ .050", .704" lift, Dart single plane, Dominator EFI, Stef's #1705R pan, F2 Procharger on E85
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post #25 of 40 (permalink) Old Apr 10th, 19, 6:38 AM
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Re: First Passes on Nova with MJ467

Quote:
Originally Posted by Steve69SS396 View Post
I ask because your MPH is low. In 2014 I ran a 427SBC that made 640HP and 565 torque. In my 3,400 pound '69 Camaro it ran 10.41 at 128 with a 1.5193 sixty foot off the foot brake. This was before I put it on a chassis dyno and found that the 14" X 4" air filter cost 12RWHP and that the AFR was 12.0 now instead of 12.8 on the engine dyno. My combo picked up about 35RWHP but I didn't take it back to the track to see what it picked up. It was setup for nitrous so the ET on the motor wasn't as important. Your engine has a little more HP, even more torque and Nova's are typically lighter than first gen Camaro's, which is why I'm asking.
Fontana has a 28.8 baro, that area has horrible air, Sacramento has a 30 plus baro, and great air, that right there is the difference, major HP difference between the two tracks. My point is your not going to make HP in a 28.80 baro with a pypes exhaust system.




Sacramento:
temperature = 52.88 deg f
relative humidity = 56 %
uncorrected barometer* = 30.16 inHg
corrected barometer* = 30.24 inHg
wind speed = 7.57 mph
wind direction* = NW (334į)
more info: current metric | historical | forecast | help
dew point = 38 deg f
saturation pressure = 0.403 inHg
vapor pressure = 0.226 inHg
grains = 32.8
air density (w/o water vapor) = 102%
air density (w water vapor) = 101%
density altitude = -490.34 ft


Fontana:
temperature = 58.92 deg f
relative humidity = 28 %
uncorrected barometer* = 28.80 inHg
corrected barometer* = 30.00 inHg
wind speed = 5.42 mph
wind direction* = NE (67į)
more info: current metric | historical | forecast | help
dew point = 26 deg f
saturation pressure = 0.502 inHg
vapor pressure = 0.141 inHg
grains = 21.3
air density (w/o water vapor) = 96%
air density (w water vapor) = 96%
density altitude = 1390.24 ft


I guarantee there is 50 plus HP observed on the dyno between Fontana and Sacramento in these type of conditions. When the baro is over 29.92 you are super charging the NA engine for free.

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post #26 of 40 (permalink) Old Apr 10th, 19, 7:59 AM
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Re: First Passes on Nova with MJ467

Quote:
Originally Posted by chevyguy8 View Post
Compression was set around 10.7:1
Nice, what heads and camshaft?

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73 CJ-5 with a 468 BBC 10:1, 265 AFR's, Sniper EFI. The wheelie machine
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post #27 of 40 (permalink) Old Apr 10th, 19, 2:08 PM
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Re: First Passes on Nova with MJ467

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Originally Posted by bh10 View Post
Nice, what heads and camshaft?
Go to the link he put in his first post, the engine is completely explained there.
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post #28 of 40 (permalink) Old Apr 10th, 19, 3:14 PM
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Re: First Passes on Nova with MJ467

Good Going RENZO!
Thanks for sharing the vids and info!

George Kettler
o SOLD 8/2016 my beloved 1970 Elky 496.
o 68 Vette 427/M-20/3.36 23 year owner

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post #29 of 40 (permalink) Old Apr 10th, 19, 6:05 PM
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Thumbs up Re: First Passes on Nova with MJ467

Congrats to the op for the initial shake down runs!

Lots of Nova guys on this Chevelle board! Got enough info in this thread alone to teach us "leaf spring newbies" how to "hook" a leaf spring car!
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post #30 of 40 (permalink) Old Apr 10th, 19, 9:51 PM
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Re: First Passes on Nova with MJ467

Wow. Great build.

I would like to know the weight. Any guesses.

'67 Chevelle Malibu, Catalina Blue, 540 inch Rat, Air Flow Reasearch 290 CNC Heads heads, Custom Hyd Roller, .675 lift, 234, 244 at .050, Lemons Headers, Holley Multiport Fuel Injection, TCI 6X 6Speed Automatic, 12 bolt Posi Eaton TruTrac, 3:31 Richmond Gears, front and rear power disc brakes, Global West Suspension, etc.

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