4T80E/Turbo-S/C... TIME FOR A NEW THREAD? - Page 35 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 12-19-2007, 12:44 AM   #341
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As you might have read, I was too anxious and coud not wait to run it. I estimated by seat of the pants to be around 300whp. I was pretty darn close! 315whp and 400wtq. That'* as much tq as my 455 Pontiac put out! The power was made on 6psi turbo and 16psi total boost, which works out to the */c "squeezing" another ~7.5psi. That'* RIGHT where I wanted the */c to be! Now, with another 2-3psi boost from the turbo, I should be at about 21-22psi total!!!! How awesome is that? 8psi at the turbo, 8psi at the */c makes 21psi!!!!!!!

But I digress. The head set will arrive Wed morning and I'll be putting it all back together. I am refitting the head studs, this time using Loctite for a permanent installation. (And a pellet or two to make sure they seal this time!) I realized I used the black goo aviation sealer in the block threads, I always used that in the old days for any bolts going in the water and oil galley plugs, too. Used it on SBC head bolts with never a problem! Oh, well, gotta clean the threads in the block real good....

here'* the dyno chart. Remember, this was with no water in the intercoolers and 6deg KR for a miserable total of only 3deg timing! The pcm starts pulling timing almost immediately, look at the tq curve and you'll see when it hits, right at 70mph (about 3500, peak tq rpm usually, but not on 3deg timing!)

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Old 12-19-2007, 01:05 AM   #342
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nice #* jeff.

i cant wait to see where ur at when its a lil more fine tuned.
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Old 12-19-2007, 01:11 AM   #343
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Nice I can't wait to see the car tuned and intercooled!
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Old 12-19-2007, 02:03 AM   #344
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Great stuff! Hope you realize how fun this is for the rest of us to watch. I can't wait until you get everything figured out properly!
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Old 12-19-2007, 04:50 PM   #345
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and can we say, torque monster?
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Old 12-19-2007, 06:45 PM   #346
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That torque curve is beautiful! Please tune it to perfection!
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Old 12-19-2007, 06:55 PM   #347
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Quote:
Originally Posted by samueljackson
and can we say, torque monster?
I expect the tq to rise once I get the timing to hold. I expect at least 425wtq on the same combined 16psi and peak around 3500rpm
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Old 12-19-2007, 10:31 PM   #348
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Jeez, that atta give an LS7 a run for its money when its tuned.
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Old 12-19-2007, 11:05 PM   #349
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Much better than an LS7.
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Old 12-19-2007, 11:58 PM   #350
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Quote:
Originally Posted by 2000SilverBullet
Much better than an LS7.
Nah, the LS7 is 505hp. Right now I'm only about 400-425. When I am finished, it'll be about 550-600!
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