Turbocharging a bonneville? - Page 4 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-10-2003, 03:11 PM   #31
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Didn't SLP make a Firehawk from a 3800 V6 and turbocharged it. If I am not mistaken that was the fastest Firehawk ever made.
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Old 02-10-2003, 03:32 PM   #32
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Quote:
Originally Posted by Bigfunkytown
Quote:
Originally Posted by willwren
Let'* all remember the great-grandaddy of our drivetrains was a.......TURBO. Some of the guys here have driven those cars.
Are you talking the tubo hydromatic transmission? My dads truck had one with the positrac transmission on his silveradoe big ten truck. I used to kill vettes in that thing back in high school in the late 70s/early 80s.
Nope. I mean the Buick Grand National. Turbo 3800 V6, RWD. The roots of our drivetrain.
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Old 02-10-2003, 11:40 PM   #33
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Quote:
Originally Posted by Buddha Jones
Didn't SLP make a Firehawk from a 3800 V6 and turbocharged it. If I am not mistaken that was the fastest Firehawk ever made.

Yes they did... In the late 80'*/early 90'*. They made a few turbo V6'*. Very very rare. Only a few thousand made. I have seen a few around here and you can make them pretty quick but with most 80'* cars require alot of maintenance.
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Old 02-12-2003, 03:17 AM   #34
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so someone is making a turbo kit. How are you going to trick the computer to run more boost?
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Old 02-12-2003, 08:19 AM   #35
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Couldn't you run a T3 or T4 off just one side of the exhaust like some diesels do and get suficient boost? And with a turbo, unlike a supercharger; your engine would spool up in such a way as not to overburden the tranny (because the tranny is constantly adjusting to the added stress, rather its already spinning at a higher rpm when it dose get stabed) unlike a granfted on supercharger would. With a supercharger you get instant power which pirs the hell out our trannys. As for the computer; I don't think it would be that big a problem as long as you upgraded the fuel delivery system. This would cause the computer to not have to adjust as quickly as it might have had to do otherwise. The trick is to use as many stock parts as you can on this thing. Five pounds of boost should be realistic for our engines and tranny. Wouldn't go more than that. As I do more research I've learned that even your radiator fluid would have to be upgraded. We need to keep this thing as simple as possible.
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Old 02-12-2003, 07:45 PM   #36
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Bigfunkytown -

You can run a turbo off one side of the exhaust, but there are many problems. You have one side of the engine that is freeflowing and the other side with cork. And no cars or diesels do that off of one side. No engine runs off one side because that is wasted exhaust that could be used for spooling the turbo. And superchargers getting instant power is not necessairly true. A roots or whipple will have instant power. A centrifgal (which is the compressor side of a turbo basically) makes boost at higher rpm'*. For the computer and fuel system, basically the easiest way is to add 2 large injectors with a controller in conjunction with the stock injectors. So the stock computer controls the stock injectors and you have your seperate unit control the other 2 for the extra fuel delivery. The trick is not to use stock parts because they are not designed for that abuse. You can run more than 5 lbs of boost, just add an intercooler, heat is the enemy that'* why stock you could actually really only do 7-8lbs. But with an intercooler you can up it to around 10lbs. Having to change out your radiator is not really necessary with doing this. Only in certain cases where you live in hot enviornments. Like Texas for example. Yes keep things simple, but also having the right tools.
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Old 02-12-2003, 08:36 PM   #37
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Quote:
Originally Posted by 99BonnevilleSE
Bigfunkytown -

You can run a turbo off one side of the exhaust, but there are many problems. You have one side of the engine that is freeflowing and the other side with cork. And no cars or diesels do that off of one side. No engine runs off one side because that is wasted exhaust that could be used for spooling the turbo. And superchargers getting instant power is not necessairly true. A roots or whipple will have instant power. A centrifgal (which is the compressor side of a turbo basically) makes boost at higher rpm'*. For the computer and fuel system, basically the easiest way is to add 2 large injectors with a controller in conjunction with the stock injectors. So the stock computer controls the stock injectors and you have your seperate unit control the other 2 for the extra fuel delivery. The trick is not to use stock parts because they are not designed for that abuse. You can run more than 5 lbs of boost, just add an intercooler, heat is the enemy that'* why stock you could actually really only do 7-8lbs. But with an intercooler you can up it to around 10lbs. Having to change out your radiator is not really necessary with doing this. Only in certain cases where you live in hot enviornments. Like Texas for example. Yes keep things simple, but also having the right tools.
Errrr,.......I am in Texas
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Old 02-12-2003, 08:50 PM   #38
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I know, that'* why I used it as an example. The temperature and humidity would for you to upgrade to a larger radiator for a turbo kit possibly. Depends.
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Old 02-14-2003, 12:47 AM   #39
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hey 99BonnevilleSE, I read that the computer will shut off the car if it reads much more than ambient boost pressure (14psi) because it dosent think it has enough fuel for the amount of air thats coming into the engine. I belive this is called overboost cutout. Im fairly unsure about this but I do know a zener diode can be put in between the airflow sensor and the computer in order to make it look like your running normal boost. Also how do you recommend adding an extra fuel injector. I have seen several different ways and I am looking for as many options that I can find. Oh one more thing in your kit do you plan to have any sort of boost control like a bleeder valve or a solenoid setup. Thanks
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Old 02-17-2003, 01:11 AM   #40
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99BonnevilleSE
How do you plan to set up the oil inlet and oil outlet lines. Are you going to put a T fitting at the oil pressure line (assuming you have one). If not that when what. And where on the oil pan are you going to connect the outlet line too. Oh and are you going to make custom headers. And I really want to know how your gonna deal with the computer. I dont know if its a problem with the pontiac computer or not. thanks man turbos rule
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