EF w/ B20B VTEC Bogging Problem Help

[ryaneg]

Here's what I've got -

1991 Civic SI
B20B
GSR head
GSR computer
Stock cam
B16 transmission with Exedy flywheel
310 cc injectors
Walbro 255 fuel pump with AEM FPR

Here's my problem -

1st gear, the car pulls really good
Shift into 2nd and the car boggs, if you stay on the throttle the bogging goes away.
Same in 3rd and 4th gear.

What do you think it could be? Thanks.

 

[FLounder]

so you are running it on a stock gsr computer? it needs to be tuned! how do you know your a/f ratio is anywhere near where it should be?

the biggest problem i see is when you put the bigger injectors and fpr on there you must get it tuned afterwards in order for it to run right. also, theres the fact that you have 0.2 bigger displacement and a different compression ratio than a gsr, so of course the gsr computer is not going to run it perfectly. although if you had stock injectors and stock fuel pressure it probably would run at least ok...

 

[ryaneg]

Yes, a stock GSR.

I also have a B20B VTEC in my EG with the stock GSR computer and it runs fine. And, that car has a Garrett turbo in it. No bogging or anything without tuning.