Thread: Turbo
View Single Post
Old 03-20-2004, 05:29 AM   #44
SkylineUSA
AF Fanatic
 
SkylineUSA's Avatar
 
Join Date: Apr 2001
Location: London, Arizona
Posts: 4,895
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via AIM to SkylineUSA
Re: Turbo

Quote:
Originally Posted by Derby
Speaking is silver, saying nothing at all is gold.

Of course they don't tell the cam setup. It is to magical to give that info. It is like putting the ECU tables on the net for download. They have to be better at something then the normal 'tuner'

Gt-power suite is a computer simulation program for intake and exhaust systems.
I have taken a look in the graphs of a friend of mine who is playing with cams for his turbo engine. He was looking for the best overlap. and after doing some simulation runs. (12 degrees 30 and 42) he came to the conclusion that it doesn't make a big difference. the only thing that differ was the VE at high revs. After the top-VE.

He did not play with different opening and closing times. But with the good programs the home-tuner can have the same data as a top secret.

Is there nobody who ever ordered a cam and did some measuring...?

Derby
Its not the that the lobes have not been checked, its the fact that to get a true comparioson, you need to be able to swap 5 or 6 cams in one day, on the same car, on the same dyno.

You can swap a 302 cam in about 2 hours, but I would imagine it would take a little longer to do a RB26 cam.
__________________

R32 GTR w/351w .020 forged, 8.9:1, PTK T76, Turbosmart 40 BC & 45 WG, Tial 40 BV, AFR 205s 310/245, 228/228 550/550 114 Hydro, 1.7rr, Isky RLs, 4" HKS exhaust, ARC 30x16x4 IC, 8 point cage, C2 gauges, 2 step, C4 3200 stall w/ R Manual & Hurst Ratchet shifter, 17" Panasport G7s, CSU 750 & bonnet, Vic Jr intake, 3.63 gears, Corbeau Carrera seats, Custom wide body, Bomex side skirts and rear 1/4 caps, Tommy Kaira bumper.
SkylineUSA is offline   Reply With Quote