hello
i just reciently bought an 87 buick gn and it is almost all stock only mods i have are flowmaster exhaust and a k&n stock air filter i cant complain i only paid $4500 for it i got it off of my dad. she runs pretty good. but i want to slowly work on making it faster i can only spend so much at one time or the wife will kill me. do i need to do anything to the car or can i just throw the thrasher chip in and go or do i need to change some things first.
thanks jason
Jason, congrats on the car. Here's a link to Thrasher website: http://www.thrasherchips.com/
Thrasher's site does advise having an adjustable fuel pressure regulator along with the chip itself. I do know that they tell you to set the fuel pressure at 45psi. That's why you apparantly need the regulator along w/ the chip. You shouldn't have a problem getting a good deal on a regulator. Even new ones are usually under $100.
You are doing the right thing by asking questions before adding a bunch of stuff. These cars really respond well to simple, basic mods. Just take your time & do not hesitate asking for advice. We all need each other to learn from. HTH
To be able to use the Thrasher chip you have to run at 45# of fuel pressure (Static).The stock setup will not work.You will have to upgrade your fuel pump and get an adjustable fuel pressure regulator.Also you need fuel pressure and boost gauges to be able to tune it after doing any mods.Hope this helps,Curt.
Sorry Joey,I must have been typing while you were posting, Curt.
Our own listmembers, Scott Simpson, Rob Wilson, and Russ Salerno are Thrasher distributors, and they actually support the chip. The website mentioned above is primarily for the FWD supercharged Buicks and don't offer support for the Thrasher chip anymore.
Just a fyi
Curt, no apology necessary.
Dwight, thanks for the info. I was not aware of that. I personally have never used a Thrasher chip, but they are very popular in the TR community.
thanks for the help guys i just didn't want to mess anything up.
jason
curt I'm in the same position as Jason how much should I expect to spend for upgraded fuel pump & an adjustable fuel pressure regulator? also i was told i could get more speed & keep my buick stock by getting a bigger downpipe, changing to a flow master exaust system, (i'm thinking of double duels)& sending more volts to my fuel pump is this true?
Walbro 307 ~ $100
Hotwire kit~ $75
237 regulator ~$40 or Adjustable regulator ~$100
Thrasher $25
Do the spring cleaning, then the upgrades, then smile as you roast the tires in 2nd gear.
Mark Tonazzi
87 GN 47K miles, above mods plus TB bypass, RJC power plate, Big mouth cold air kit, vent kit, ATR 2.5 duals and CAT. Tuned with Turbolink.
Other cars
88 Corvette Convertible
86 Monte Carlo SS 350/700R4/Posi
85 442
85 Monte Carlo SS
hey mark,
I tried to email you off line, but it came back.
My buddy is in the middle of restoring his 85 442. He has some questions about
certain parts. Do you think that you can answer some questions for him?
you can email me at jsta6@bellsouth.net
Walbro 307 ~ $100
Hotwire kit~ $75
237 regulator ~$40 or Adjustable regulator ~$100
Thrasher $25
i have a grand national that i just got, completly stock except for a K&N filter and dynomax super turbo exhaust, if i do those mods, what will my car be running?
Walbro 307 ~ $100
Hotwire kit~ $75
237 regulator ~$40 or Adjustable regulator ~$100
Thrasher $25
i have a grand national that i just got, completly stock except for a K&N filter and dynomax super turbo exhaust, if i do those mods, what will my car be running?
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What is it running now?
i dont really no, i have a kind of huge tranny problem that needs lots of attention before i can really push the car...
Hey Mark, what are you running at the track? My combo is almost identical to yours and I'm just curious what you're running. My best is a 13.4 @ 102 at 18psi on 94 octane. I think I was kind of lean though, but my pro-touring suspension set-up killed my 60' times (~2.1).
Thanks,
Sean
87 GN - 13k miles, cold air intake, Hemco plenum, ATR exhaust w/o cat, H.W. Walbro 307, AFPR, stock everything else
Actually, I have never ran mine at the track. I do know that the Thrasher chip increased my boost by a few lbs. over the stock chip, and I could also tell there was more boost with the exhaust and cold air mods too. My plan is to get the boost sensing harness and a boost gauge next. I have a couple of WOT blasts from 5 mph to ~90 mph recorded on my Turbo-link, all the numbers look good with 0.4 KR on one run, slightly up hill, and 0.0 on the other, level ground.
I'm sure my track times would suck because I am very traction limited, I only have 225/60 Gatorbacks all around. I know this much, once I get traction, the GN flies right by my Corvette, which only spins a little on launch. I owe much of that to the 16+ pounds of boost in 3rd gear!
No more mods for me until I can see exactly how much boost I am running :-)