LT1-LT4 Modifications 1993-97 Gen II Small Block V8

need more mph in the quarter

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Old Sep 4, 2012 | 04:37 PM
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Default need more mph in the quarter

got a 94 lt1 running drag radials with a 1.67 60ft but the quarter is 12.41 at 109 whats the easiest thing to do to get more mph..


simple mods???
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Old Sep 4, 2012 | 04:41 PM
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Last edited by lt1slowz28; Sep 4, 2012 at 04:53 PM.
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Old Sep 4, 2012 | 04:44 PM
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want to do it all motor its a 355 completly forged
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Old Sep 4, 2012 | 04:50 PM
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Can you give us a complete rundown of the car?

Forged 355 means nothing if you put unported heads and a stock cam back on it. HP is about airflow and heads and cam are what handle that.
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Old Sep 4, 2012 | 04:53 PM
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Need alittle more info on your car. But the general rule of thumb is 1mph=10hp at the wheels on the big end. Big horsepower is made with good heads and cam combo's.
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Old Sep 4, 2012 | 04:54 PM
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What gear you runnin? What's the weight of your car? Rpm range? What wheels/tires are on it? Stick/auto? Details.....details. I have pushed my mph up with the details and no real power added.
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Old Sep 4, 2012 | 05:01 PM
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loss weight. it helps in all aspects of getting the car down track.
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Old Sep 4, 2012 | 05:09 PM
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Lt1 350 bored to a 355
Heads ported and polished (flows: intake 278, exhaust 197)
CC Cam 230/242, .510 lift,113 lobe separation
Comp Cams Pro Magnum 1.6 roller rockers w/7/16" studs
Comp Cams 987 Dual Valve Springs
SI Silverline Series Valves,(2.00" intake and 1.97 Exhaust)
Eagle H beem connecting rods
JE Forged Nitrous Pistons
Crane Hardened Push Rods

Intake.
Ported Intake Runners to match Heads
K&N Cold Air Induction
Relocated Air Intake Temp Sensor

Exhaust
Hooker Headers Long tubes.
3" Custom Made Y Pipe
Borla 3" exhaust

Electrical
Custom Tuned Computer pcm for less
Accell Super Coil
LT1 Scanmaster


Fuel
FMS 30lbs. Injectors

Transmission
Rebuilt Stock Automatic Transo Shift Kit w/ 3 washers installed
Hayden 24,000 Tranny Cooler
Tranny Temp Gauge (In Piller Pod)
PI VIG 3500 Stall Converter
Suspension
GMS Rear Lower Control Arms
GMS Sub Frame Connectors (welded)
GMS Strut Tower Brace
Adjustable gas shocks and new coils.
10 bolt with torson locker with 4.10s
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Old Sep 4, 2012 | 05:14 PM
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I would start looking for some mechanical problems over looking for more power because with those mods you should be running far faster than 109mph.
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Old Sep 4, 2012 | 05:16 PM
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Better tune maybe?

That's a lot of mods to only be trapping at 109. Lots of guys do that with only bolt-ons and zero weight reductions.
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Old Sep 4, 2012 | 05:17 PM
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Originally Posted by RamAir95TA
I would start looking for some mechanical problems over looking for more power because with those mods you should be running far faster than 109mph.
with my internals whats the time u would put on the car???

wht do u think could be wrong if anything??
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Old Sep 4, 2012 | 05:18 PM
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Originally Posted by tbag_skywalker
Better tune maybe?

That's a lot of mods to only be trapping at 109. Lots of guys do that with only bolt-ons and zero weight reductions.
the guys from pcmforless tuned it they said a mail order tune would be good for it i wanted to dyno it but they said no need too
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Old Sep 4, 2012 | 05:19 PM
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Any info on the heads?
What's with the wide LS?
What's with the exhaust valves?
Have you had it on the dyno yet?

You're running what cam-only 503 cars are running so something seems to be up.
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Old Sep 4, 2012 | 05:21 PM
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Originally Posted by RamAir95TA
Any info on the heads?
What's with the wide LS?
What's with the exhaust valves?
Have you had it on the dyno yet?

You're running what cam-only 503 cars are running so something seems to be up.
thts what the cam paper said and the heads are ported thts the numbers he said it was i bought it built...
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Old Sep 4, 2012 | 05:24 PM
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im sorry the exhaust vavle is 1.57
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Old Sep 4, 2012 | 05:29 PM
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Dyno?
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Old Sep 4, 2012 | 05:30 PM
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cam paper says gross vavle lift .510 for intake .540 exhaust
duration at .006 tappet lift intake 281 exahust 293
lope lift .3400 intake for exhaust .3600
and lobe separation 113
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Old Sep 4, 2012 | 05:30 PM
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no dyno
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Old Sep 4, 2012 | 05:30 PM
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what kinda time u think i could be putting down

Last edited by unioncarpenter84; Sep 4, 2012 at 05:38 PM.
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Old Sep 4, 2012 | 05:35 PM
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If the heads aren't butchered POS's and everything else is operating properly with good traction, reduced weight and good weather I'd imagine mid to high 11s is very doable.
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