When they rated the TR at 245 hp back in '87...
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That was just a number GM put on the car because the vette was "rated" at 255 hp. Watch the "245" hp buick GN race the lighter "255" hp corvette and see who wins the 1/4 mile. But to answer your question I would have to guess that it was rated at stock boost levels ~10 psi.
getchasum
MISSING 2 CYLINDERS???
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Some where on the net there is a clip of a stock GN on a dyno from back in 87 as it left lhe factory, think maybe it was even the last GN off the assm line, hp was in the low 300 range.
No, not at all!!
The original wastegate actuator only had a 12# srping in it, so getting even that was a good day. The stock gauge only peaked at 15, you wouldn't want that pegged out all the time.
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Jim Ruggles...
I was in his shop while he was dyno testing an "out of the crate", 87, stock ECM. 290@ the flywheel.
Deducting for the "in car" the accessories, I'd guess the 245 is close.
As for boost, as I recall, that started out at about 18, and worked it's way down to about 13 in top gear. Chip gooroos should be able to tell how it was programmed...
I was in his shop while he was dyno testing an "out of the crate", 87, stock ECM. 290@ the flywheel.
Deducting for the "in car" the accessories, I'd guess the 245 is close.
As for boost, as I recall, that started out at about 18, and worked it's way down to about 13 in top gear. Chip gooroos should be able to tell how it was programmed...
The horsepower was 235 for 86 and 245 for 87 to acceive this in 86 the boost was 13 and in 87 it got turned up to 15 the stock boost gauge has + or - of 3 lbs. It was derated for insurance, it was increase in 87 to stay ahead of the corvette. Thus the slogan from GM engineers "We brake for Corvettes". Still the only car to be the fasstest production car other than the vette for Gm.
Gary Wells
White turbo Buick trailer park trash
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I would rather remain silent and be thought of as a fool than to speak up and remove all doubt.
If you know something then speak up. It hasn't stopped you in the past! :biggrin:
turbofish38
Le Pétomane
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Count me in for the last comic standing than.
The numbers GM published are just fictional numbers. Purely numbers just pulled out of thin air. The press cars were ringers. Drag out the Moroso Dream Wheel and depending on what ET you look at you will see numbers ranging from 200 to 350. Can that God awful Vette has to be on top myth once and for all. Read any book you can on the Corvette. Especially those written by the engineers such a McClelland. There were quite a few years that the Vette wasn't the most powerfull car built. Chevy could care less. They had a saying. If you got beat by a GN than you didn't race long enough. No speed limiter on a Vette! Okay enough with the vent. I say fictional. Here's the story I read back in the 80's. The reason was because of the 200-4R tranny. You know darn well how much power you can tweak from a turbo Buick. Buick was there first afterall. And this goes back to the hot air days. Okay so now you have this monster and you have the car. Now you have to get the power to the ground. You call up the Hydramatic division for a trans. They ask what is your target torque. You say you just saw 400 on the dyno. They say good luck. We dont have a tranny. Now your pissed.What do you do? Tone down the power a little. Wait and call them back. Now you play a little game called "what can you build for us" so we can all be happy. We and Us meaning the bean counters are in on this project. The 235/245 number was a compromise. Thus the invention of the BQ and later BRF version of the 200-4R. Kind of like, I'm going to write a number on a piece of paper and you tell me if that's okay? Use some logic and reason and you'll see that this holds true. What's the best 200-4R? Yep. How long will a stock BRF run before it needs something? Yep. Why doesn't the 700-R4 come with a BOP bolt pattern? Yep.The TR would be a dog without the 2.76 first gear ratio. Yep.
With all of that. Does it really make a difference at what boost level they used. Common sense would tell you that you can't make 245 horses with out it.
Hey anybody want to hear my story on the Intercooler? It's about the same.
The numbers GM published are just fictional numbers. Purely numbers just pulled out of thin air. The press cars were ringers. Drag out the Moroso Dream Wheel and depending on what ET you look at you will see numbers ranging from 200 to 350. Can that God awful Vette has to be on top myth once and for all. Read any book you can on the Corvette. Especially those written by the engineers such a McClelland. There were quite a few years that the Vette wasn't the most powerfull car built. Chevy could care less. They had a saying. If you got beat by a GN than you didn't race long enough. No speed limiter on a Vette! Okay enough with the vent. I say fictional. Here's the story I read back in the 80's. The reason was because of the 200-4R tranny. You know darn well how much power you can tweak from a turbo Buick. Buick was there first afterall. And this goes back to the hot air days. Okay so now you have this monster and you have the car. Now you have to get the power to the ground. You call up the Hydramatic division for a trans. They ask what is your target torque. You say you just saw 400 on the dyno. They say good luck. We dont have a tranny. Now your pissed.What do you do? Tone down the power a little. Wait and call them back. Now you play a little game called "what can you build for us" so we can all be happy. We and Us meaning the bean counters are in on this project. The 235/245 number was a compromise. Thus the invention of the BQ and later BRF version of the 200-4R. Kind of like, I'm going to write a number on a piece of paper and you tell me if that's okay? Use some logic and reason and you'll see that this holds true. What's the best 200-4R? Yep. How long will a stock BRF run before it needs something? Yep. Why doesn't the 700-R4 come with a BOP bolt pattern? Yep.The TR would be a dog without the 2.76 first gear ratio. Yep.
With all of that. Does it really make a difference at what boost level they used. Common sense would tell you that you can't make 245 horses with out it.
Hey anybody want to hear my story on the Intercooler? It's about the same.
Common sense would tell you that you can't make 245 horses with out it.
.
True then.... Not anymore!!
BuckeyeTroop
Active Member
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Just refering to all the "guesses" on what the original boost was supposed to be back in 86/87... I no longer wish to argue such points on these forums anylonger, here the last few years there seems to be a huge plethora of self appointed experts that have been into T/R's a re a "few" years. I'm sure you've noticed the change in the board(s) the last few years...right?
That's why you see me posting so seldom anylonger.
It's just not much fun anymore.
It just seems that those of us that have doing this since "day one" are banging our heads against the wall more and more and more when trying to add something to a discussion.
I'm sure if you've been paying close attention, most of the "originals" are no longer even on the board. There's good reason.
Sorry, didn't mean for this post to be so long.
