C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old May 19, 2006 | 10:34 AM
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Default Performance mods

I currently have a stock 87, Mods I am planning on doing are

Headers & catback
Dana 36 I am not sure what gears are in there now but looking at 3.54's
Port my stock heads
52mm Throtle body
Big mouth intake
Large tube runners
ZZ9 or ZZ409 cam
new prom

Anything I am missing? what kind of power over stock am i looking at with these mods? I am not looking to break any speed records here and that is obvoius with what I suggested but just looking to get into some respectful power numbers like 350 to 400 chp & ctq.

Thanks

Last edited by corvette87; May 19, 2006 at 10:49 AM.
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Old May 19, 2006 | 10:47 AM
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Originally Posted by corvette87
I currently have a stock 87, Mods I am planning on doing are

Headers & catback
Dana 36 I am not sure what gears are in there now but looking at 3.54's
Port my stock heads
52mm Throtle body
Big mouth intake
Large tube runners
ZZ9 or ZZ409 cam
new prom

Anything I am missing? what kind of power over stock am i looking at with these mods? I not looking to break any speed records here and that is obvoius with what I suggested but just looking to get into some respectful power numbers like 350 to 400 chp & ctq.

Thanks
Get a super ram and a 219 cam, that will make a significant increase in power over the big mount large tube runner combination.
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Old May 19, 2006 | 11:24 AM
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You need a SR and 219 to make your goals easily. Although you could make the lower end of that with what you've listed, you wont get near 400chp on a 350.

Dont need gears, and ZZ409 is not a good fit for TPI.

Last edited by vader86; May 19, 2006 at 11:33 AM.
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Old May 20, 2006 | 02:28 PM
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Thanks guys, What about the mini ram?
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Old May 20, 2006 | 02:40 PM
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Are you aiming for dyno numbers, or better 1/4 mile and acceleration? These are two different things. Do you race it?
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Old May 20, 2006 | 03:58 PM
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LT, SR. or MR all have there intended use.

MR will definitely make the highest HP, and be a great choice for a 10-11 sec car.
SR is a great intake for a mid 11-13 sec car that is driven a lot on the street.
LT runners with a BM base is great for near stock to 12.50ish and basically a street combo.

I have run all of these on my '87 and they all worked well when I was at a certain ET.

Additionally, cam selection (as well as other parts) will be highly dependent on the intake and the requisite operating RPM.

Aaron
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Old May 20, 2006 | 04:13 PM
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Is your car a stick or an auto?
From what I have heard (I'm no expert) if you are looking for 1/4 mile times the Mini ram is a better choice than the Superram for hooking up with a manual tranny.
Wait for someone else to confirm this though.
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Old May 20, 2006 | 05:14 PM
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I haven't yet with this car but will see some track use but mostly street. I would like to get some good dyno numbers and good acceleration. I want to be in the 12's for the 1/4mile is my ultimate goal.
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Old May 20, 2006 | 05:26 PM
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have seen cars running high 8s with a miniram. definitely works
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Old May 20, 2006 | 05:53 PM
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Originally Posted by DieL
have seen cars running high 8s with a miniram. definitely works
The mini ram was only one mod of many to be running 8's.

It's also not overly expensive.
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Old May 20, 2006 | 06:55 PM
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If his car has D36 then its automatic, in which case you can put the 219, SR, and a decent TC in there and pull mid 12s no problem.

Read my website if you are trying to decide between MR and SR, SR is better suited for you.
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Old May 20, 2006 | 07:33 PM
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Yes it is auto with the Dana 36. I will take look
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Old May 21, 2006 | 12:10 PM
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Thanks for the infor guys. I Think the SR is the right setup for me. I will do some research on that but is anyone running a SR setup I can peek at?
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Old May 21, 2006 | 12:18 PM
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Check out my engine pics - in 04 I had a SR
http://s8.photobucket.com/albums/a26/vet85us/?sc=2

Watch for used ones.
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