PAGING Jose and other!!!!
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From: Mufflerville, CA
PAGING Jose and other!!!! Quick easy question:
I am buying a short block ASAP. I am going to run my T76gts. I tried my best with the compressor map but I am not so familliar with how to accuratly analyze my motors needs.
Would a stock bore 364 be more efficient than a 370? Thanks. I would like to maximize my T76gts without choking it at all.
I am buying a short block ASAP. I am going to run my T76gts. I tried my best with the compressor map but I am not so familliar with how to accuratly analyze my motors needs.
Would a stock bore 364 be more efficient than a 370? Thanks. I would like to maximize my T76gts without choking it at all.
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370 is the biggest i would do on a 76, plus the extra cubes will allow for a nice sized turbo later on down the road if desired, for instance an S88 on a 370 like Kyle
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Originally Posted by ninetres
lol
**** it. I'm gonna go with a 364, since it sounds like a 370 would be too big.
**** it. I'm gonna go with a 364, since it sounds like a 370 would be too big.
If you've got a badass set of heads and a cam to match them for your application then you can run the turbo you want with smaller cubes and still be better off. Now if the heads and cam are fairly stock it would take more to make out that turbo at 364 CI then it would with a sweet heads cam setup at less cubic inches. You have to look at the whole picture with that motor to choose the turbo setup. Airflow i believe plays more of a role then does CI..
I'm saying backpressure through that t4 flanged 76 is gonna choke that thing out up high much quicker than on a 34X" engine... Remember Kyle's large-frame 76 (GT42 I think) on those same cubes and what his results were...
Whats the goal for the car? ****, engineermike has ~700rwhp with his 383ci LTx log manifold kit with a T76GTS THRU AN AUTO TRANNY. If this isnt going to be an all out race setup, then you'll be fine 383ci or under.
Originally Posted by Frost
I'm saying backpressure through that t4 flanged 76 is gonna choke that thing out up high much quicker than on a 34X" engine... Remember Kyle's large-frame 76 (GT42 I think) on those same cubes and what his results were...
We'll let him chime in. 
better flowing heads wont help it would actually hurt. The more air that comes in the more that has to go back out and thats where the backpressure is made. Enough exhaust cant flow throught the exhaust housing and exhaust so backpressure builds up.
Originally Posted by V6 Bird
I also would like to believe he has a very nice set of heads on that 370" motor too We'll let him chime in.
We'll let him chime in.Yes they did flow rather nice..
I just know what we saw with my combo.... and what happened when we switched to the S88 with less boost....
Kyle
Originally Posted by ABeasst
better flowing heads wont help it would actually hurt. The more air that comes in the more that has to go back out and thats where the backpressure is made. Enough exhaust cant flow throught the exhaust housing and exhaust so backpressure builds up.
The engine is one big Air pump...The more efficient it is with moving air the more it will create issues on the back side.
Originally Posted by Smearin
I dont think you can compare the s88 to a 76.. those things flow very well .. i think the only thing comparable is that they are the same size...
Did you really even read this thread????? It was comparing when i had my GT42-76mm turbo and how choked i was with it with a 370ci motor.....
Turbo to small..........