What are you guys doing for intercoolers in your C4 vettes on high boost applications? I've outgrown the standard ATI intercooler that came with my kit (small intercooler that lays on top of the air box) and I've been trying to figure out a good way to install intercooler(s) and I'm stumped! Any ideas or suggestions would be appreciated.

 

I will try to get some pictures of mine and post them in the next couple weeks
You can't believe how much better a big custom intercooler is over the ATI not only does it flow much more but air inlet temp is much lower.

 

Thanks, looking forward to the photos!

 

Black bart
Please post IC pix. Eventually I will need custom IC as well.

Chris (Brand X) How is your new motor going? did you have a chance to snap some pix of your new 8 ribs brackets and spacer specs. I am reallly lookning forward to this. Thanks bud

PS. Chris do you happen to know Shalin? I am going to see him in delaware for street tunning on my car in 5/5/03

Bruce


[Modified by Bruce, 8:03 AM 4/19/2003]

 

Hey Bruce,

The crank pulley I was using was a proto-type Keith from Forced Fed let me borrow and had to give it back to him after it. I recently sent my crank pulley off to ASP pulleys to have them press an 8-rib pulley on it and weld it in place (Keith's pulley had an aluminum 8-rib that was locked in place by set screws...one backed out and ate my optispark--will go w/welded unit).

I've been spending lots of time in the garage getting things ready (e.g., detailing under hood, clearancing the block for 396 stroker, trying to figure out how to splice an Accell gen VII into my stock wiring harness, etc.) However, the project is on hold until mid-May as my AFR heads are on back order.

I will try to email you some photos in the near future and I will mail you a template as soon as I figure out a better tensioner method (currently using manual tensioner...trying to go with a spring type from a 5.0 Mustang). As for the offset, won't know for sure until I see what ASP does to the pulley.

As for the intercooler, I was seeing an 7 psi drop across the ATI unit...too much cfm for that small unit to flow (at 18 psi I'm making about 1000-1200 cfm). I was thinking of going with either an air-to-water or water injection unit from Spearco, as I can't seem to figure out a good way to install air-to-air intercooler. Was looking at doing a twin high flow from ATI but plumbing looked like an L.A. freeway interchange.

I don't know Shalin Patel but I've heard of him--heard he knows his stuff on LT1-Edit and blower car tuning. Amazing what these guys can do with a computer. Let me know how that turns out.

CT

 

As for the intercooler, I was seeing an 7 psi drop across the ATI unit...too much cfm for that small unit to flow (at 18 psi I'm making about 1000-1200 cfm). I was thinking of going with either an air-to-water or water injection unit from Spearco, as I can't seem to figure out a good way to install air-to-air intercooler. Was looking at doing a twin high flow from ATI but plumbing looked like an L.A. freeway interchange.

I don't know Shalin Patel but I've heard of him--heard he knows his stuff on LT1-Edit and blower car tuning. Amazing what these guys can do with a computer. Let me know how that turns out.

[/QUOTE] This is why I built a custom intercooler the ati unit is a poor engineered intercooler not only because it is too restrictive but it blocks the air flow to the radiator. The ati is so small that the end tanks are in front of the radiator they are about three inches wide so that is six inches plus a three inch hose down the right side so now you have nine inches of the radiator blocked. Most people think that installing a intercooler will cause overheating but that is not true if you have a core in front of the radiator instead of solid metal. I have a custom built Spearco that measures 3x16x26 inches I don't remember the size of the ati but I think it is about 8x11.
My intercooler will flow 1500+ cfm with a 1.5 pressure drop if you wanted to flow more than that it will but you will see a increase in pressure drop but there is no way that you are going to get 1500 cfm into your engine. I have a 16 inch Spal pusher fan installed in front of the intercooler more for cooling the charge air than for engine cooling. I have my Gen.7 dfi setup to control the fans and a manual switch to override it if I choose to do so.
This is not easy install it requires a lot of custom metal fabrication but like all things in live you get out of it what you put into it. All tubing is three inches and instead of going under the radiator like ati { NO GROUND CLEARANCE } I used another path so that the tubes are above the bottom of the radiator.
As for using the wheelwell for intercoolers I have a MSD digital-7 box in the right side and a tank for water/alcohol injection on the left side. Besides that it would look poopie with tubes everywhere. I installed one of those things that goes in the front license plate cover but instead of routing it to the air intake it just blow straight into the intercooler and that made enough difference that on the open road the fan rarely runs. My intake temp. has dropped dramatically. I dont have any pictures but will try to post some in the near future. By the way the new gen.7 with wide band is light years ahead of the old ones if you ever buy one go with the wide band the Gen.7 without is not that much different than the old gen.6 that I had but the pro version wide band is incredible.

 

Chris/Black Bart
Man you guy are awsome. I am still learning every time I come this board. Chris, I will give Keith a call about his alumimun 8 ribs crank pulley.

When I am start making near max boost with the new 8 rib setup, Then I will look into custom IC as you guys have.


Bruce

 

If Keith can't build what you want try ASP I had them build mine I got the first set of 8 rib pulleys that they made for a L98. When I called he said he had never built any but thought that he could. I had him to build mine from billet aluminum

 

Bart, regarding the gen Vll DFI, is the box a direct exchange? That is, can you replace the 6 with the 7 and use the existing wire harness that connected the 6?

 

Bruce,

Blackbart is right about the gen VII...I recently went to one. There is a guy out of the west coast that can make a splice-in wiring harness for the LT1 obd1 cars. At some point, the maf sensor will become useless and you'll need to up the map sensor and injectors (currently run 2 bar "may" be upping to 3 bar w/new engine and 84# injectors...50# injectors max out around 550 rwhp). Backbart has a different crank pulley than the LT1 but ASP can mod your current pulley to add the 8-rib drive. Keith has ordered a large quantity of "all new" custom application pulleys from someone (not a retrofit), same idea as the ASP 8-rib pulley. He is also pulling together a cog drive setup...everything will look the same except in cog teeth. However, the D1SC isn't up to the loads a cog can place on it...if I go that route (can't image I will if I can make 18 psi w/D1SC) upgrade to the F1SC first (F1SC has a transmission that can hold up to the cog).

Blackbart, it sounds like you do injection on top of your air-to-air, is that correct? I thought about the Spearco water injection but wasn't sure how well it worked...I'd like to know how it is working for you. Also, you car sounds like it is at the place I'm trying to get to...any photos would be greatly appreciated.

 

No it is entirely different.
I sold my old system to a member on this forum. I only changed because I had to go to the low impedance injectors and hated too spend the money but after I got the new one installed sure glad I switched. Can't tell you about all the improvments here or I would be typing all day but I have the Pro-version they are not all the same. Some think they only make the one but I can tell you that the pro-version with the wide band option is awesome if you get one buy the wide band. If you don't get the wide band then stick with what you have.

 

Hey Bruce,
I think I've figured out this digital camera thing...its only been since Christmas I've been trying to download these photos...apparently I haven't!
CT




[Modified by Brand-X, 8:04 PM 4/23/2003]

 

Chris. those lunati rod look prety sweet. They are definately stronger than the H beam. Look like those 28cc JE pistons bursted up prety good with 18psi of boost with a lean fuel.


Bruce

 

Yeah, I broke it good! Actually, I had two pistons that looked like that.

I edited the post above and added a few photos.



[Modified by Brand-X, 8:11 PM 4/21/2003]

 

TTT

If anyone has any good solutions to intercooling a C4, I would like to hear about it.

Black bart, I look forward to the photos of your setup...very interested in the mounting location and plumbing.

PS--has anyone on here ever done this rally? http://www.gumball3000.com


[Modified by Brand-X, 9:14 PM 4/23/2003]

 

Has anyone tried an air-to-water intercooler on a C4? If so, how well did it work?

 

I'm running alch/H2O injection on my L383 SC...it was a must.....works like a champ....no need to reinvent the wheel here...the Grand National folks have a system that will adapt to the C-4. You can set the pressure switch to kick in to suit your engine needs. Here is just one of many links out there:

Enjoy,
Frank

http://home.att.net/~stevemon/AlcoholInjMod.html


[Modified by Corvette86, 9:00 PM 5/2/2003]

 

What works depends on how much boost a person is running. I have a Spearco Water\ Alcohol injection system plus a VERY large custom built Spearco intercooler and two high performance spal fans one pulls the other is a pusher to maintain high air flow through the intercooler also use a MSD boost retard and still fight detonation. C\R is only 9.1 :auto: