T76GTS vs GT47
#2
That's not even a fair comparison. They are way different sizes and hp potentials. A better comparison would be the 76GTS versus the GT42.
Anyway, the 76GTS will support 1100 or so hp and will usually fit in the engine compartment without major surgery. The GT47 will go up to 1500 hp and is physically way too big to fit in the engine bay without moving around alot of metal.
Mike
Anyway, the 76GTS will support 1100 or so hp and will usually fit in the engine compartment without major surgery. The GT47 will go up to 1500 hp and is physically way too big to fit in the engine bay without moving around alot of metal.
Mike
#3
Thanks. Interestingly enough, there is a company offering the 76 as standard, with an available flange for the GT47. But they make no mention that it won't physically fit in the same space. Appreciated.
The car is slated for 700+ hp, so it sounds like the 76 will do nicely. Do you know (roughly) what boost level a 383 would need to obtain this objective? With an intercooler, of course.
The car is slated for 700+ hp, so it sounds like the 76 will do nicely. Do you know (roughly) what boost level a 383 would need to obtain this objective? With an intercooler, of course.
#4
Originally Posted by koolaid_kid
Do you know (roughly) what boost level a 383 would need to obtain this objective? With an intercooler, of course.
Interestingly enough, back when I was running 11 psi on my old 383, I estimated the fwhp to be around 680. It made 550 rwhp through an A3/loose converter and pulled about 133 in the quarter. That was with AFR 210 heads, a 224/236 cam, a Vortech water/air aftercooler, with the T76GTS.
Mike
#5
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go w/ the 76GTS, you'll love it! as far as hp, i have no idea since my car will probably never see a dyno. on 20psi, and a very conservative tune (no more than 19* of timing), i should already be in the mid to low 10 sec 1/4 and have run a 6.94 in the 1/8th w/ plenty of room to spare. gotta line out this suspension.
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#9
Originally Posted by MIGHTYMOUSE
my gut is that the 76 might be small on the exhaust side for a 383.... i guess it depends on the rpm range of the engine
Mike
#11
Originally Posted by MIGHTYMOUSE
and if your gate is wide open running the turbo hard, imagine the boost stability problems he may run into cutting it down to 700fwhp..maybe even need a second gate
Mike
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Originally Posted by engineermike
I've pulled 146 in the quarter at full weight with a T76GTS .96 on 388 cid. The WG is wide open, too, so there's more in it. It will do fine, depending on goals. Rpm will be limited to ~6300 with those cid and that turbo.
Mike
Mike
#17
Originally Posted by eLTwerker
What would be the next step up from a 76? I'm going w/ 400rwhp NA 383 + turbo and would like power to 6500. I'm only looking for max 600-650rwhp.
Mike
#18
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I have a GT47-88 up front:
http://psj.ls1tech.com/gallery/main....d=10&g2_page=5
I'm not a turbo expert, but I'd be considered about how it spooled out back though I don't really know anything about rear mounts.
http://psj.ls1tech.com/gallery/main....d=10&g2_page=5
I'm not a turbo expert, but I'd be considered about how it spooled out back though I don't really know anything about rear mounts.
#19
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Originally Posted by eLTwerker
What would be the next step up from a 76? I'm going w/ 400rwhp NA 383 + turbo and would like power to 6500. I'm only looking for max 600-650rwhp.