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I also had my engine built by dave and group 9 at lecso auto IND...
and when i took out the cams to replace with stock cams, i got some performance back.
This is exactly one of the things jack did for me at his shop when i was down there, was decide to replace daves cams with stock ones. Actually we went with a NON turbo 2.0 intake cam, and a normal turbo 2.0 exhaust cam.
i had custom mapped DI/APC and LH fuel chips from SQR (1990 9k turbo), and even with the new programs, the cams were still just being counter-productive to the whole setup.
Basically the program i am running, and probably your program too, has the HIGHEST and BEST performance levels at the low to mid RPM range. i'm not familiar with yoru car and it's mods, but if you haven't had custom tuned chips yet, and they are some sort of generic drop in replacement, then this is my guess.
If that is the case, than you might be able to handle 7,000-7500 rpm at redline, but it sounds like there isn't much going on up there in the computer programs, you know?
With daves cams, i could bounce my tach off the rev limiter at like 62-6500 rpm all day long without hurting anything, but it would take a considerable ammount of time to get up there. With his cams acceleration and spool was slower at the low rpms ranges, but once i reached 4k rpms, the engine would accelrate VERY hard.... HOWEVER, boost levels had tapered off by then... so it was all mis-matched.
The cams just did not work for my setup. They woudl be great for someone who could had a huge turbo, and maybe a stand alone computer system.
So... to give you an example of how my new computer progams are running, so you could compare it to yours and see if you might be better off with stock cams....
Boost reaches 7-10 psi by 2K rpms, and reaches it's peak of 20psi at 3K rpms. Everyone once it a while, it'll spike to 21-22psi, but it'll always level off perfectly at 20psi by 3Krpm and after. It holds 20psi all the way up to just after 4krpm, but not quite 4500, at which point it'll taper off pretty drasitcally to 15psi, where it will stay until redline.
I'm actually not sure if it hold 15psi all the way until redline, there MIGHT be another taper off in the high high rpm ranges, to like 10 psi or something.
Anyways...
that's the best program i could get for my car, period. That's the nicest thing i could ever hope to get for performance out of the stock computers... and as you can see... if it's STILL tapering boost at 4k rpm range, than nice big cams that pull in the higher rpm range are really being counter productive... because when the maximum boost leela are going on, the cams aren't really doing much, they aren't really helping to spool the turbo either... and then when they KICK in, the boost levels in the programs is tapering off... and it just sucks. ;)
i think you get my point. I'm not saying this is the exact problem in your car with your cames, but it was mine. I sold the performance cams to someone who can use them.
I guess all there is to say is, swap the cams with stock cams, do a dyno run, and post results. At the least, it'll be "educational" ;)
-gavin
posted by 69.168.104...
, Sat, 23 Oct 2004 17:31:39
, Sat, 23 Oct 2004 05:13:22, Sat, 23 Oct 2004 18:51:10
, Sat, 23 Oct 2004 12:06:07
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