Please remember i am still tuning this car. it is coming right along though, if i could just get it to keep from falling on it's face out of the whole. i think the car has mid to high 12's in it. feels very solid too. anyhow one of the runs we took the exhaust off and the car was way lean so i just crept it down the track. anyhow, i am car 37 in the slips. I hotlapped it a couple of times also to try and see how consistent it was. not bad. 13.25 constistently.
Best Time was a 13.148 @106.477

SPECS:
88 gt
95 Northstar
288 cams (CHRFab)
Holley Commander (CHRFab)
4t80e trans w/ PCS Controller
3.11 Final Drive
3200 Stall Converter
coilovers front and rear
Weight- 3120lbs w/ me in it
Street tires (225/65/15)

[This message has been edited by Totty (edited 10-15-2007).]

Good job. You getting any wheel spin?

What final drive do you have?

I think running a higher stall converter would definately help. It looks like you've got the power there.

nope no wheel spin,
I am running the 3.11 ratio. now that my speeds have increased i wish i had gone ahead and done the 3.71 and a limited slip, that way i could shift into 3rd earlier. before i wasn't hitting 3rd gear in the quarter but now i have it shifting at 7500 rpms instead of 8250 rpms. any opinions of a limited slip for the 4t80e?

[This message has been edited by Totty (edited 10-15-2007).]

How much are the CHRFab 288 cams supposed to be worth over stock?
Even not fully tuned, you've got some good consistency there. Nice runs.

quote Originally posted by Totty: nope no wheel spin, I am running the 3.11 ratio. now that my speeds have increased i wish i had gone ahead and done the 3.71 and a limited slip, that way i could shift into 3rd earlier. before i wasn't hitting 3rd gear in the quarter but now i have it shifting at 7500 rpms instead of 8250 rpms. any opinions of a limited slip for the 4t80e?

That 3.11 is going to kill your 288 cams. You need to get them breathing sooner. If you used a 3.11 trans/drivetrain, that means you have the lower stall converter too... a double whammy.

Steal a 3.71 final from a wrecked car at the junkyard, swap it in and drop 0.5 sec off your time*.

*YMMV

I could chirp the tires shifting when I had 215's in the rear. With the 255's, it doesn't do that anymore.

Nice times. Is that on sticky tires? If I read correctly your 60' is in the 2s. You should be able to cut near two tens out of that. How are you launching it?

How do you like the PCS controller? I'm getting ready to buy one.

sorry for the delay in response.

Formula88: the 288 cams are rated at about 75 hp over stock. however i am still running the factory downpipes which is a little restrictive and not exactly balanced. i would say i am at about 370hp overall. i am looking to get some dyno time before winter sets in but i want to redo my exhaust first. just looking for some options other than a dual inlet/dual outlet magnaflow i have now. i think the exhaust is working against itself in the low end.

ryan.hess: i know now the 3.11 is killing me. how hard is it to change the final drive in the car? i did change the converter out for a custom 3200 stall from TCS in Arizona http://www.tcsperformance.com/. w/ the low ratio though i don't think i am getting the full benifit.

Alex4mula: the runs were all on stock street tires (some crappy mastercrafts). I tried a couple of different launches. I the first few runs i launched at about 2500rpms. then i tried flashing it at about 1500 and it didn't seem to hesitate as much but i don't think my 60' times were as good.

rockcrawl: the PCS Controller is great. it has absolutly unlimited abilities. i have just begun to scratch the surface too. i don't think my shift points are were they should be right now. Alan (CHRFab) http://www.chrfab.com told me to let it shift at about 8250rpms but for some reason it isn't shifting there. There isn't one thing i would change about either of the computer set ups (trans or engine) that i have. they make tunning very easy and user friendly. you just have to know what differences the changes are making.

I added a lot more fuel and some more timing and changed my wide band o2 compensation settings so i am hoping this helps my low end power.

[This message has been edited by Totty (edited 10-17-2007).]

quote Originally posted by Totty: ryan.hess: i know now the 3.11 is killing me. how hard is it to change the final drive in the car? i did change the converter out for a custom 3200 stall from TCS in Arizona http://www.tcsperformance.com/. w/ the low ratio though i don't think i am getting the full benifit.

That depends on your setup and how much room you left yourself.

I did it, and I would call it a 9.8/10 on the difficulty meter. If the transmission was out and laying around, it would be a 2/10 and take you maybe an hour to do. I had to grind things down to pull off the tail housing cover, and it just got worse from there.

I feel like i left myself room on that side. of course i will have to take the suspension apart and the axle out but the only mount that i have right there is the factory mount. I am assuming you just have to take the housing apart at the passenger side axle housing?

Yep. And if you can slide the cover off without much trouble, you can probably slide the FD gears out without trouble.

I'm curious how mine performs next season with the getreg. I've got a few little tricks to tinker with over the winter.

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NorthStar Powered

Hey ryan.hess,
you wouldn't happen to have a 3.71 unit would you?

quote Originally posted by Totty: Hey ryan.hess, you wouldn't happen to have a 3.71 unit would you?

How to tell without dissasembling. I have a 4t80 e out of a Eldo. numbers??

Great looking times for where you are at right now. It pulls like a train comming down the last 1/8 thats for sure.

I dont know if its gearing or tuning, but your main weakness seems to be the lower side, and the launch. This could mean suspension problems, or just a gear ratio issue that is showing itself alot in the first 1/8.

I would say with those traps and 60', you are not any where near your HP estimate. I would guess about 265-270whp, but exhaust and more dialing in with that dang ECU would help a ton I imagine. I know things are a different game with that tank of a 80e transmission too.

Well it's been a few months since i have really gotten to drive the car. i have had some time to do some more tuning and i have figured out the reason for my hesitation off the line. i got that straightened out and i can't wait to go back to the track and see what a difference it makes. now i think i am going to have traction problems. the stock mastercraft 215's just don't hook up, haha. after that i am going to try the dyno out and get a few tuning issues resolved.

i have been kicking around the final drive ratio swap and i would love to do it but i still don't have a definate answer on what it takes and what parts i need.

quote Originally posted by Totty: i have been kicking around the final drive ratio swap and i would love to do it but i still don't have a definate answer on what it takes and what parts i need.

Yeah I am still unclear on how to ID a 4t80E gear ratio withotu having to take it apart. Is there any codes on the trans?

quote Originally posted by Totty: Formula88: the 288 cams are rated at about 75 hp over stock. however i am still running the factory downpipes which is a little restrictive and not exactly balanced. i would say i am at about 370hp overall. i am looking to get some dyno time before winter sets in but i want to redo my exhaust first. just looking for some options other than a dual inlet/dual outlet magnaflow i have now. i think the exhaust is working against itself in the low end.

CHRFAB rates those cams 75hp with mild head porting as well. Might be 50hp without. Would need to dyno before and after to see how much they really help.

Good to see more cars at the track. I'm sure a good dyno tune will help you a lot. I have not spoke with many people that like the holley commander. Hopefully it works well for you.

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Buy a fiero, become a mechanic
3.4 dohc Install
Sub Install
Northstar Install

quote Originally posted by Totty: Well it's been a few months since i have really gotten to drive the car. i have had some time to do some more tuning and i have figured out the reason for my hesitation off the line. i got that straightened out and i can't wait to go back to the track and see what a difference it makes. now i think i am going to have traction problems. the stock mastercraft 215's just don't hook up, haha. after that i am going to try the dyno out and get a few tuning issues resolved. i have been kicking around the final drive ratio swap and i would love to do it but i still don't have a definate answer on what it takes and what parts i need.

The final drive swap is honestly not really a final drive, its more of a gear ratio, because its before the actual transmission, although it functions the same...

[tact]
While trying my hardest to say this nicely, I dont think the tires are a problem. My experience seems to show that without shock loads going to tires, you can have just about any hunks of rubber on the back of a fiero and run 1.7's. I think the hesitation was the biggest problem, and better tires never hurt, but dont expect them to solve your "inexperienced launching" problem unless they are a "dripping wet with rubber" slick. [/tact]