went to track with mpfi swap

[gsf1200m]

I converted over to mpfi in my 91 STD a couple weeks ago, and all it had before that was a CAI.
My base time was 18.4@72 with a 2.6 60' time.
Tonight i brought that down to a 17.3@75.
I was hoping for a little bit faster but that is more than a second off so im pretty happy.
Im still using the crappy 4 speed so i think that may be one of my problems.
Hopefully that will be going next summer as well as a header and cat back, and then i should be in the 16s.
Oh ya, on flat highway, my top speed increased from 95 to 110.

[gsf1200m]

My new 60' time was 2.4.

[tbk49]

1 second off is pretty good improvement, i think your tranny is really screwing you over though, its gearing is the worst for 1/4 miles.

[gsf1200m]

Ya, I wish I had time or money to get rid of it now, but i will have to wait til summer when college is over.
I know those horsepower calculators are not correct, but I figure mayb the difference in my before and after times will give me a good estimate of how much horsepower I have added.
So when I did it, the calculator said that I gained 19 at the flywheel and 15 at the wheels, which seems pretty consistent for what other people have gained with this sway.

[Ace$nyper]

cool to hear your liking teh MPFI i should have mine soon i'm hoping for a high 16s though

[gsf1200m]

Ya, everything is going fine with it so far.
THe car takes a little longer to crank over than beofre and takes a little while longer to warm up, but other than that its awesome.
I was hoping for 16.9, but that didnt happen.
Do you have a 5 speed and any other mods?

[Ace$nyper]

i got teh four speed but i have whole cat back cat wheels tires other junk and take out rear seats spare tire all that junk for track.

[fredthedragon]

what ecu do you have? and have dude i swaped to a 5 speed and it's definately worth it i do 90 sometimes on accident, if that gives you any idea about the performance increase, but all i have is dx trannie and ecu.

[gsf1200m]

If youre asking me im using the Si ecu.
I just compared my best before slip to my best after.
What i found was that in the first 8th mile i dropped my time by .8 seconds.
But in the second 8th mile i only dropped .3 seconds, which suggests that the tranny is screwing me when i shift into third at aroudn the half way mark.
I really wish i could swap out now.
Do you guys recommend the Dx tranny or the Si?

[Ace$nyper]

SI tranny is better then DX imho.

[4g4d_getone]

i swapped out for the mpfi like 3 months ago and it did a whole lotta difference. and then after that i put on a cai and that made a good difference also. now my next project is to get this fukn motor installed.

[Masta]

SI tranny for sure

[fredthedragon]

definately si tranny i'm regretting paying to have my dx tranny yanked from my totaled car for the price i payed for it i could have bought an si tranny completely restored, it's better than a Sexualy Transmitted Disease transmission. abd the fifth gear is really nice, you will like.