How to increase boost??

[greatwhitenorth84GN1of452]

Hey everyone, im new to the forum live in alberta canada, I have an 84 GN with the stock engine pulled and in storage running an 86 Intercooled powertrain. Just had the car gone through by a professional shop, installed a FAST system, new injectors, boost controller. It has a bigger than stock turbo and intercooler but stock engine internals.
Issue is I can only run up to about 6lbs boost without risking detonation on 91 octane. I dont believe the best way to build power is to shoot water/meth into the engine and my mechanic wont even consider installing it. I know alot of you all in the us are having good luck running E85 but its new and very hard to find at service stations up here. Im at about 275 at the rear wheels but it just dosent have the jump i was looking for after investing over 8 k into the car. I want to get into the 10's and Im contemplating aluminum heads and roller cam set up but still think the boost has to be looked at prior to another large investment. Id love to hear any info you would like to suggest. Thanks alot
Brent

 

[we4Mateo]

Hey everyone, im new to the forum live in alberta canada, I have an 84 GN with the stock engine pulled and in storage running an 86 Intercooled powertrain. Just had the car gone through by a professional shop, installed a FAST system, new injectors, boost controller. It has a bigger than stock turbo and intercooler but stock engine internals.
Issue is I can only run up to about 6lbs boost without risking detonation on 91 octane. I dont believe the best way to build power is to shoot water/meth into the engine and my mechanic wont even consider installing it. I know alot of you all in the us are having good luck running E85 but its new and very hard to find at service stations up here. Im at about 275 at the rear wheels but it just dosent have the jump i was looking for after investing over 8 k into the car. I want to get into the 10's and Im contemplating aluminum heads and roller cam set up but still think the boost has to be looked at prior to another large investment. Id love to hear any info you would like to suggest. Thanks alot
Brent

There's a tune issue if you can't get an intercooled car to at least 12psi without kr even on 91octane. Pull timing until you can do that and see what you have. 275 is pretty stout for 6psi. What is done to the motor to flow enough to make that much power on 6psi?

Alky is totally the way to go btw unless you want to run race gas all the time.

 

[turbo89]

Hey everyone, im new to the forum live in alberta canada, I have an 84 GN with the stock engine pulled and in storage running an 86 Intercooled powertrain. Just had the car gone through by a professional shop, installed a FAST system, new injectors, boost controller. It has a bigger than stock turbo and intercooler but stock engine internals.
Issue is I can only run up to about 6lbs boost without risking detonation on 91 octane. I dont believe the best way to build power is to shoot water/meth into the engine and my mechanic wont even consider installing it. I know alot of you all in the us are having good luck running E85 but its new and very hard to find at service stations up here. Im at about 275 at the rear wheels but it just dosent have the jump i was looking for after investing over 8 k into the car. I want to get into the 10's and Im contemplating aluminum heads and roller cam set up but still think the boost has to be looked at prior to another large investment. Id love to hear any info you would like to suggest. Thanks alot
Brent

First Fire the Shop you took it to .. a FAST on a stock Car ? really ?

Second .. do some researching on here ..

I would probably take half the parts you had put on OFF as stock with just a chip they will make more than what your putting down ...

Chip. fuel pump.. injectors... hotwire... valve springs ... 44 / 49 turbo .. E85 .. scantool ... LEARN to TUNE ...

 

[Braxton Jordt]

Why WOULDNT you go with methanol injection? I have it and run 25 pounds with no kr at all on 91 octane

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[earlbrown]

Because you need to make the car run right before you add alky. You've has some 'performance' add-on stuff added that's got your car messed up. No reason to add another factor at this point.

 

[Braxton Jordt]

I don't believe the best way to make power is to spray methanol and that his mechanic won't even consider it is what he said....If the car was running right. He wouldn't go with alky

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[hungerbuhler1]

Get a new mechanic.

 

[QwikStop]

This just doesn't sound right.....

 

[626gn]

Get a new mechanic.

X2

 

[TurboBuRick]

Something is wrong. You should be able to run 17-18 pounds without a problem. What is your wot afr and timing?
If the guy tuning is not real familiar with the turbo Buick's I could see the timing being way to high and fuel way too lean. Without alky and running low octane, 18-20 degrees timing in low gear (1st-2nd) 17-18 in (3rd) max. AFR's in the low 11's high 10's.


There are some people afraid of alky. They are uneducated but not completely off their rocker. I can't tell you how many alky pumps I've replaced on peeps cars who had no idea it was not working. With that said it's not something you assume will always work. You have to be on the ball. Hell I've seen guys blow hg's because the pump failed, replace the gaskets and do it again never bothering to test the alky system.

Have the tuner set the timing and fuel targets to the above values and see how it goes.

Another option is to call Harline Performance and pay Cal to make you a file. He knows fast xfi and turbo Buick's very well.

Good luck!

 

[greatwhitenorth84GN1of452]

1st There are limited shops available up here that even remotely know how to tune/work on these cars and I got totaly screwed by the first guy I took it to. 3k and it would stall at intersections
2nd I bought the system off Cal who wrote the program on these cars
3rd The guy tuning my car is a former race mechanic and works on nothing but High end turbo and supercharged cars and races a turbo supra through the us and canada
I only got the car back from the shop to put instorage for winter so never got a chance to check all the numbers but it just didnt launch like i thought it would have after the upgrades
as far as the alchy he showed me engine internals about how the swirling air flow forces the heavier water/meth to the outside of the intake, with some cylinders getting alot of water/meth and others getting none, it made sense to me, the damage was real and like i said he will not even install it for me and as far as shops go im screwed up here, unless anyone has any suggestions for shops in the Calgary Alberta area???

 

[Braxton Jordt]

Do tons of research on here and do work yourself. I'd never pay anyone to work on my gn. I just have been reading and learning. Also. High end turbo cars doesn't clarify much. Buicks are not like a turbo supra, rx7 or whatever high end turbo car means.

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[earlbrown]

as far as the alchy he showed me engine internals about how the swirling air flow forces the heavier water/meth to the outside of the intake, with some cylinders getting alot of water/meth and others getting none, it made sense to me, the damage was real and like i said he will not even install it for me and as far as shops go im screwed up here, unless anyone has any suggestions for shops in the Calgary Alberta area???

Well there you go. No reason to use real world experiences to the positive on that alky garbage. :\

 

[greatwhitenorth84GN1of452]

Do tons of research on here and do work yourself. I'd never pay anyone to work on my gn. I just have been reading and learning. Also. High end turbo cars doesn't clarify much. Buicks are not like a turbo supra, rx7 or whatever high end turbo car means.

Posted from the TurboBuick.Com mobile app

By high end I ment any time i have been in his shop hes only got turbo'd and twin turbo's toyotas and nissans and big dollar muscle cars ( 69 camaro, big block, stroked and blown, on NoS running race tires that hes tuning on the dyno .........not saying that makes him a GN expert, thats why im here to make sure im not being misled but i trust his reputation and clients

 

[turbo89]

By high end I ment any time i have been in his shop hes only got turbo'd and twin turbo's toyotas and nissans and big dollar muscle cars ( 69 camaro, big block, stroked and blown, on NoS running race tires that hes tuning on the dyno .........not saying that makes him a GN expert, thats why im here to make sure im not being misled but i trust his reputation and clients

No offense .. but his reputation is self explanatory ... 8K in upgrades and 275 hp .. no need to say anything else .. you could have gotten that with $100

 

[earlbrown]

........not saying that makes him a GN expert, thats why im here to make sure im not being misled but i trust his reputation and clients

From what I've read, it's both. You trust his tuning AND you're being mislead.

No offense .. but his reputation is self explanatory ... 8K in upgrades and 275 hp .. no need to say anything else .. you could have gotten that with $100

I guess I'm more of a 'results' kinda guy more than a 'reputation' kinda guy.

It had more than 275hp when it was sitting at the dealership in 1987.

 

[Bescurred]

8k in upgrades will get you almost double that 275 #... Don't be afraid to turn your own wrenches.

Your racing buddy is blowing smoke and taking your money.

 

[artrenee10]

What computer chip is in the car?

No offense but what do you personally know of your GN that your mechanic hasn't told you?

Do you have a scanmaster even?

Start here.


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[LEW_86]

Im new to the turbo buick scene also, but what has been mentioned before... Read, learn and do your own work especially the simple tasks. At the same time you will begin to know your vehicle and understand its capabilities to include the limitations. I have learned that these cars are like women. Show them love and respect you will reap the rewards!

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[Vince13]

Try contacting Morretto Motorsportz (bought Campbell Automotive a few years ago) in Edmonton. They had a mechanic there named Nolan who was big into Sy/Ty's and GN's and had a good reputation.
Don Campbell built my motor a few years ago but I think he has retired.

You still have 4 months of winter ahead of you so read everything you can on this site especially posts from Nick Micale, Bison, Turbobob and the other tech advisors. Also read everything on Vortex Buick site.

You really need to become self sufficient up here, it is a small community and everyone I have met does as much of their own work as possible. Once you have studied as much as you can you know what you are comfortable tackling yourself and when it makes sense to contact a vendor.