Weird problem

[Chris Howard]

At 13:27 12/11/96 EDT, you wrote:
>Hi all,
>         I have been on this list now for quite a while now and I 
>have learnt much about fuel injections systems, however, I have a 
>problem which I am at a loss to solve. The car is a Toyota Corolla
>GTS with a 4AG motor. I have 10.5:1 pistons, 288 cams and a tweaked
>stock EFI system. The motor redlines the gears up to 4th, however, 
>5th does not go past 6,000 rpm and I am losing quite a lot of top 
>speed here as the redline is at 7,500 rpm. I have done an indicated 
>speed of 210 km/h with the present wheel/tire combination and a stock 
>engine @ 7,000 rpm in 5th gear before. 
>       Has anyone here experienced something like this before and can 
>offer some suggestions? Any suggestions are welcome.
>

Have you dynoed the car? Is the power peak above 6000? Maybe there is a
drop in the power curve at 6000 which makes you top out there in 5th. Try
going down a hill, it might make it past 6000 and then go all the way.

Good luck,



Chris Howard
Computer Science
University of New South Wales
email: s2184002 at cse.unsw.edu.au
Web: http://www.usyd.edu.au/~choward - Aussie Touring Car Action