Ok,

I have an 88 HF with a b18c5 block and PR3 head and ECU. The head has all the ITR internals. Running a J1 tranny with a good clutch. I ran a 14.4 @97mph with a 2.1 60 foot time. I am running a PR3 ECU with all the basic bolt ons. I do not have any codes and I know that I am at least a decent driver. I did a compression test on the pistons and they were 240, 245, 225, 250. I know I should be running better times. At least in the high 13's, Could it be that my piston rings are going? That 14.4 was a clean run on drag radials. Any ideas?

Sal

 

is the ecu chipped?

 

What RPMs are you shifting at? Unless you've got an aftermarket tach, or a JDM SiR, you're gonna have to ignore the stock USDM Si one basically.

 

the times are pretty good. nothing unusual. remember you are not running a complete B18c5, the pr3 head is not a type R head and you are still running a pr3 ecu which is not the greatest ECU. convert to an obd1 ecu and get some ITR cams, and that thing will be way better.
and your compression is good. its the head and ecu is what holding you back.

 

No the ECU is not chipped. I shift right before the rev limiter. I have it down prettey well because when the needle is pegged a split second later the rev limiter kicks in. I am actually using all the ITR internals. I have the cams, and the valve springs and retainers. What is a safe RPM to shift with all the ITR internals. What should I set my rev limiter at?

Sal


[Modified by ACRXGuy, 10:00 PM 11/24/2002]

 

thats not good.

 

im assuming cilly 3 needs new rings

 

Would that cause that much of a loss in performance, if I have to change out the rings then I am not doing it half ***. I will just put in some stronger pistons and rods to prep it for a turbo. What would be a good set of pistons and rods for this car?

 

That comp is a little down, did you do a wet test as well? I wouldn't worry too too much about that cylinder, it won't be slowing you down much. Do a wet test next, and see what your values turn out to be than. If they raise a little, and even out, than your rings in that cylinder are a little weak. But still, 225psi is HUGE compression, it is not low by any means. Just in comparison to the other cylinders. But it is still well within tolerance.

Those times are not terrible, definatley the ecu needs some changing. Maybe try getting more traction, cause your probably spinning like a ****, even though your 60s are pretty good.

 

Can you explain how to do the wet test? What would you suggest doing to the ECU. I was thinking of just raising the rev limiter. Nothing to advanced. I have a fuel pressure regulater as well as 270cc RC injectors, so I dont think I really need to mess with the fuel. What RPM is the ITR Valve train safe to go up too?