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

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Old May 10, 2011 | 12:22 PM
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it what i read somewhere true that the 58mm TB's aren't street friendly for some reason?
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Old May 10, 2011 | 12:23 PM
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Originally Posted by aklim
If your bodyshop can't do it, there might be some other issue. Mine didn't blend anything.

Sure. You just cannot simply slap on a 58mm TB and expect it do do anything. You need the supporting stuff like the plenum and manifold, etc, etc.
oh yea well i know that i was just wonder that is i went all the way if it would be drivable... i forget what site but one that sold the throttle body's suggest not going over 52 for street applications
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Old May 10, 2011 | 12:29 PM
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Originally Posted by RedBowTies88
it what i read somewhere true that the 58mm TB's aren't street friendly for some reason?
I can tell you my friend went slower at the track with a 58 TB as opposed to stock and we did back to back runs. HOWEVER we were taking a car that was bone stock
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Old May 10, 2011 | 12:35 PM
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oh i believe you im just trying to look at the big picture so i can generate a list of the stuff i need. the mini and stealth rams accept the stock configuration thottle body's correct?


im trying to decide if i wanna try and see what i can get out of the TPI or just go to a ram right away...
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Old May 10, 2011 | 12:40 PM
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If youre even open to a ram type intake just do it youll probably switch up to it anyway.
If youre in love with the look of the TPI different story
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Old May 10, 2011 | 12:42 PM
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Originally Posted by RedBowTies88
oh i believe you im just trying to look at the big picture so i can generate a list of the stuff i need. the mini and stealth rams accept the stock configuration thottle body's correct?


im trying to decide if i wanna try and see what i can get out of the TPI or just go to a ram right away...
Sure. They all have the same bolt pattern
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Old May 10, 2011 | 12:42 PM
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i couldn't care less about the looks! i just like going fast and now that my truck is pretty settled i wanna put some fun money into the car...

just 900 for the intake + 400 for the fuel rails + the money for headwork and a cam adds up quick.. plus i don't know what my stock (Brand new but stock) clutch will handle


Originally Posted by aklim
Sure. They all have the same bolt pattern

good deal. thanks a ton for all the help man
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Old May 10, 2011 | 12:59 PM
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Originally Posted by RedBowTies88
they didn't have to blend it to get it to look right? only because the paint on my car is in pretty good shape ide kick myself if i let it start to look any worse.
Don't Greenwood scoops sit on top w/o needing to be blended? Find their website, you'll see.



Originally Posted by RedBowTies88
that holley power pack with the stealt ram/rails/TB and all that jazz is going for 2k on summit...sound reasonable? can you daily drive a 58mm TB? i've heard its not ideal
If you want a steathram, get the basic unit and rails. It's about $600 total IIRC. (you don't need the electronics)

You don't NEED an aftermarket TB either. The stock unit flows enough to support 350hp. You could opt for a 52 or 58 and get a couple extra ponies....probably less than 10. Tuning will take care of any flow/AFR differences. With a cam, ported heads, intake, and exhaust you'll need a tune anyway. It will include adjustments for all TB openings.

FWIW, another member mcrx24 was running a TPIS TPI setup last year on the stock tune. He got 322rwhp and 396rwtq. It had a hotcam, TPIS ported heads, TPIS bigmouth intake, and TPIS headers on a PACE 350 block. ZF6 stick transplanted into an 88.
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Old May 10, 2011 | 01:03 PM
  #29  
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Originally Posted by GREGGPENN
Don't Greenwood scoops sit on top w/o needing to be blended? Find their website, you'll see.





If you want a steathram, get the basic unit and rails. It's about $600 total IIRC. (you don't need the electronics)

You don't NEED an aftermarket TB either. The stock unit flows enough to support 350hp. You could opt for a 52 or 58 and get a couple extra ponies....probably less than 10. Tuning will take care of any flow/AFR differences. With a cam, ported heads, intake, and exhaust you'll need a tune anyway. It will include adjustments for all TB openings.

FWIW, another member mcrx24 was running a TPIS TPI setup last year on the stock tune. He got 322rwhp and 396rwtq. It had a hotcam, TPIS ported heads, TPIS bigmouth intake, and TPIS headers on a PACE 350 block. ZF6 stick transplanted into an 88.

thanks ill look that up about the scoop.

you don't think ill need injectors or any of that stuff? what kinda power would i make if i went to the ram with stock heads and cam? would it be any improvement at all until i could afford to have my heads ported or a set of afr's..

also, what do people use to tune these? i own and am very familiar with efilive V2 but obd-1 stuff looks like a whole different animal
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Old May 10, 2011 | 01:06 PM
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Originally Posted by RedBowTies88
that holley power pack with the stealt ram/rails/TB and all that jazz is going for 2k on summit...sound reasonable? can you daily drive a 58mm TB? i've heard its not ideal
Gregg is right. I am controlling my system with the stock ECM. You will need to hook up your fuel hose and mount your MAP sensor on the plenum but that only involves a drill.
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Old May 10, 2011 | 01:08 PM
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stock ecm but its been tuned right?

sorry for my ignorance..not sure what these computers are capable of
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Old May 10, 2011 | 01:12 PM
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Originally Posted by RedBowTies88
thanks ill look that up about the scoop.

you don't think ill need injectors or any of that stuff? what kinda power would i make if i went to the ram with stock heads and cam? would it be any improvement at all until i could afford to have my heads ported or a set of afr's..

also, what do people use to tune these? i own and am very familiar with efilive V2 but obd-1 stuff looks like a whole different animal
See thread HERE

You should get new injectors if the old injectors are stock Multecs. Probably need upgraded injectors if you want to make 350 RWHP

I got mine dyno tuned by Hitech Motorsport
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Old May 10, 2011 | 01:16 PM
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Originally Posted by RedBowTies88
stock ecm but its been tuned right?

sorry for my ignorance..not sure what these computers are capable of
The chip has been tuned but the rest is stock
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Old May 10, 2011 | 01:18 PM
  #34  
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so does that only control injection then? im used to slightly more complex ecu's lol
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Old May 10, 2011 | 01:25 PM
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Originally Posted by RedBowTies88
so does that only control injection then? im used to slightly more complex ecu's lol
Injection, IAC, advance, etc, etc. Same as what your ECM controls today
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Old May 10, 2011 | 01:31 PM
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ok nice... where i can get a tunable chip?
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Old May 10, 2011 | 01:33 PM
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Originally Posted by RedBowTies88
ok nice... where i can get a tunable chip?
Your EPROM in the ECM is tunable already. They have to wipe out the program and flash it
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Old May 10, 2011 | 01:57 PM
  #38  
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gotcha. are there any programs sold to the general public that allow for home tuning?

sorry again i just don't know jack about obd-1 tuning
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Old May 10, 2011 | 02:42 PM
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Originally Posted by RedBowTies88
gotcha. are there any programs sold to the general public that allow for home tuning?

sorry again i just don't know jack about obd-1 tuning
There are. Look in the Scan and Tune section. I don't want to do it myself since it involves learning and that usually involves trial and error which can lead to KABOOM. The time it would take me to figure it all out, it would be cheaper and easier to hire someone to do it since I don't do it on a daily basis. A mistake can lead to breaking an engine
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Old May 10, 2011 | 03:02 PM
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Originally Posted by RedBowTies88
you don't think ill need injectors or any of that stuff? what kinda power would i make if i went to the ram with stock heads and cam? would it be any improvement at all until i could afford to have my heads ported or a set of afr's..

also, what do people use to tune these? i own and am very familiar with efilive V2 but obd-1 stuff looks like a whole different animal
Look at threads from Chaos about 6mo-1yr ago. He ran that combo IIRC. I'm pretty sure he dyno'd it too.

It will be an improvement -- especially in topend. Get 24lb SVOs and you'll be good to go.

Moates provides a plug-in board that piggy-backs in place of your mem-cal. It's flashable. TunerPro or Tunercat allow you to change parms to complete the tune. WideBand sensor makes it foolproof. Or you can do a PCM4Less/MSeven chip. They are custom tuners.
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