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Old 06-06-2008, 04:15 PM
Salvatore Salvatore is offline
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Default Re: Black RS/Z & the 1/8 mile... any suggestions?

If the motor isn't to tired it is ALL in the rear and putting an M20 trans in. Post the pictures!!!
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Old 06-06-2008, 04:48 PM
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Default Re: Black RS/Z & the 1/8 mile... any suggestions?

It has a M20... the motor is running out of fuel on the top, plus the points are bouncing at 7200...
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Old 06-06-2008, 05:11 PM
Salvatore Salvatore is offline
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Default Re: Black RS/Z & the 1/8 mile... any suggestions?

It may ET better at 6500-6700 rpm's. Are you running at least a 4:56? I am running 72's and 78's in the 780. Mine feels the strongest at about 6700 with a 4:10 rear and an M21. Mine needs at least a 4:56 to feel like anything. Its a dog!!
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Old 06-06-2008, 05:22 PM
Chevy454 Chevy454 is offline
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Default Re: Black RS/Z & the 1/8 mile... any suggestions?

I like blocking the rear PV on our 780s...it seems a lot more consistent. You sure that thing is running out of fuel?
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Old 06-06-2008, 05:34 PM
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Default Re: Black RS/Z & the 1/8 mile... any suggestions?

The plugs are awfully white... Didn't have any larger jets with us last night...
Only have a 4:10...
How much worse would 4:56's be driving on the street?
4:88-5:13's would really pick it up.

OBTW- 2.00 60 foot times...


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NCRS#65120
68 GTO HO 4 spd Alpine Blue /Parchment 2 owner car
#21783 71 Corvette LT1 45k miles Orig paint - Brandshatch Green - National Top Flight - last known 71 LT1 built.
71 Corvette LT1 42k miles Original paint - Black - black leather - only black LT1 known to exist.
NUMEROUS Lemans blue Camaros,
Monza Red and Daytona Yellow Corvettes
& a Chevelle or two...
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Old 06-06-2008, 05:37 PM
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Default Re: Black RS/Z & the 1/8 mile... any suggestions?

Hey Rob when you block the PV how many jet sizes do you need to go up?
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NCRS#65120
68 GTO HO 4 spd Alpine Blue /Parchment 2 owner car
#21783 71 Corvette LT1 45k miles Orig paint - Brandshatch Green - National Top Flight - last known 71 LT1 built.
71 Corvette LT1 42k miles Original paint - Black - black leather - only black LT1 known to exist.
NUMEROUS Lemans blue Camaros,
Monza Red and Daytona Yellow Corvettes
& a Chevelle or two...
Survivors, restored cars, & other photos
https://picasaweb.google.com/lh/myphotos
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Old 06-06-2008, 05:47 PM
Chevy454 Chevy454 is offline
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Default Re: Black RS/Z & the 1/8 mile... any suggestions?

We have 4.56s in the Sub, and they ain't a whole lot worse...unless you're gonna be doing extended freeway duty? I think a jump of 6-8 is the rule of thumb, but I'd have to check my notebook to see where ours fell...our L72 is probably jetted a *lot* smaller than most of you guys would guess...
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