Weird problem

[Gregory Chan]

, 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.
> 
Chris,
         I haven't dynoed the car as I am not a serious racer and the 
car is used for highway racing, hence my need for top speed. I 
just can't get past 6,000 rpm even down a hill.

gchan at compserv.senecac.on.ca