What should I be running?

[TurboTer]

Any idea what my 1985 GN should be running? I have all of my mods listed in my sig. Also, by February I'd like to upgrade the injectors, add an adj. fuel pressure regulator, put in a 2800 stall, convert to an 86/87 ECM, and add an electric fan. You think by then I should be able to hit 12's? I never ran the car and I have no idea what it is currently doing.

 

[TurboTer]

Whoa, no one?

 

[BuickTV6]

What kinda chip are you running? And injectors? Sounds like you got what it takes to get yourself into the high 12's at least, but i would say tuning will be the big issue. If you're tuned, with a Ta49 you should do pretty decent, cause they spool not too shabby with the stock convertor. Do you have T-link or any other type of program to tune your car?

 

[boostmaster]

Hold on a minute Terry!!! One thing for sure with all that extra air flow, big down pipe, big exhaust, cold air kit. A good cam wouldn't hurt, but not a necessity (stock ones have been in the 10's). Butttt you diffenitly need to get yourself some new injectors at a min. some 36lbers but no larger than 42lbers. Best to install them when installing the turbo so you don't have to do it twice. Trying to bolt on a big turbo with stock injectors is just a waste of time. All you'll be doing is knocking yourself into head gasket heaven.

 

[racemybuick]

Sounds like a strong mid to high 13 sec GN. Without those injectors, and especially without a good chip, you are not going to break into the 12's unless that car is running perfect.
My mods are almost identical to yours as I am slowly putting the car together. I recently got a .30 over block, which has shown a 12.8 slip with a really decent combo of a 33 turbo, 36# injectors I believe, 3" dp, eletric dump pipe, nitto drags, a whole mess of other goodies, and that car was pretty well tuned. No cam, but heavy porting. That was for a 12.8 slip, just prior to the slicks and a posi rear. Ask Herb Fishman, or turboregal84. He sold me his engine. These cars are pretty tempormental, and you need a whole lotta air, and enough fuel to keep that beast happy. If you want to make a fast car, porting is almost required. That intake is junk and blocks a lot of good flow. Heads should be at least gasket matched with the intake. Ask anyone on this board who does not have an intercooler, it takes a lot of work on our cars to get those 12 sec slips. You can do a search on this forum and find out what I asked about how to get the 12 sec mods. There is also a recipe page on GNTTYPE.org. Good luck...I think you have a strong car, and you definately got the mods for a high 13 sec with good tuning, but if youre looking for faster, I think you about half way there.

Good luck!

John

 

[Chad Oliver]

12-13's

that's my guess. How was your old intercooled car setup?

 

[TurboTer]

Thanks for all the info guys. I have decided not to install certain parts in dribs and drabs. I'm gonna install all the parts at once. Which brand are the 42 pound injectors? Anyone have a link to them? To change the ECM, do I need just the 1986/1987 ECM, MAF, MAT, and Caspers wire kit, or something else? Is it true a Scanmaster 2.1 won't work correctly until all this is done?

 

[TurboTer]

Wow, no one here can answer these simple questions?

 

[boostmaster]

Upgrades !!!

Terry I don't know how to post a link but is the site that you will find a good deal on injectors. As far as the size injectors I think maybe 37-40 lbers will be your best bet cause 42's have had a rep for being fat on the low end and may be hard to tune for beginers. As far as the ECM conversion all you need is an 86-7 ECM, maf, mat sensor and mat sensor wire, you can actually run the mat sensor later if you want to. Hope this helps.

 

[irockwithdirt]

Curious how U went about installing your TA49?

Thanks, Kevin

 

[TurboTer]

Re: Upgrades !!!

Originally posted by boostmaster
Terry I don't know how to post a link but is the site that you will find a good deal on injectors. As far as the size injectors I think maybe 37-40 lbers will be your best bet cause 42's have had a rep for being fat on the low end and may be hard to tune for beginers. As far as the ECM conversion all you need is an 86-7 ECM, maf, mat sensor and mat sensor wire, you can actually run the mat sensor later if you want to. Hope this helps. http://www.racetronix.com

I wen't to the site and didn't see any 40's, but they had 37 and 42's. Some were flow matched, and some weren't. Should I opt for flow matched, which run about $10 more each?

 

[TurboTer]

Re: Re: Upgrades !!!

Originally posted by TurboTer
I wen't to the site and didn't see any 40's, but they had 37 and 42's. Some were flow matched, and some weren't. Should I opt for flow matched, which run about $10 more each?

 

[boostmaster]

wont make much of a difference. either way you go.

 

[mike85gn]

I'd go with 36# or 42.5# (aka 009) injectors with your setup, add the adjustable fuel pressure regulator, convert the ECM, then get a chip from www.turbotweak.com. FWIW, I have less mods than you do (TA-33, downpipe, K&N, AFPR+hotwired pump) and my best is in my sig. You can also check out the performance recipe I wrote up at http://www.gnttype.org/techarea/recipes/hotair2.html. Good luck!