Gt 42 T6
01-06-2007, 12:06 PM
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Gt 42 T6
Starting to think about a totally different combo down the road. What is the opinion on the GT 42 T6 as I can get one cheap. It doesnt appear to spool up as fast as the PT 76 however top end flow appears better? Thoughts?
01-07-2007, 08:54 PM
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Originally Posted by vanillagorilla
What's the A/R on the exhaust? What size compressor is on that? A T6 turbo is a pretty large framed turbo, so what exactly are you plans? 4 digit hp/tq?
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01-07-2007, 10:06 PM
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Originally Posted by Stoichiometric
That is the compressor exducer size though, I thought turbos were called out by the inducer size which would be closer to 80mm on that unit??
The compressor inducer is 74mm - perhaps not that big? Still dont like the lag. Compressor map attached.
01-07-2007, 10:16 PM
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That turbo does not seem overkill to make 800-1000hp. I don't really know how the pro's and con's would weigh on decreased spool time vs. higher backpressure if you were to use a T4 flange. It seems like most people think a T4 76mm inducer turbo is on the small side for a 408, I am sure the response is excelent but it may not make great top end HP. Maybe the T6 74mm is a good balance between the two, responsive and still capable of big numbers without choking a 408. I was personally thinking about using a T6 88mm on my 408, but that will be a more race-specific truck.
What I am trying to say is; I don't know!
What I am trying to say is; I don't know!
01-08-2007, 02:35 PM
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No way is that turbo going to be laggy on a 402 or 408. I think it would be great. Just take the correct converter.
The turbo is really not that big physically. It is bigger than a PT76 because thats what I had on my truck originally, swapped to a GT42-76 for 2 days till I blew it up, then went to a GT47-88.
Not my truck but my old setup on a different truck with some bling work.
At 23psi on my stock lightning longblock:
The turbo is really not that big physically. It is bigger than a PT76 because thats what I had on my truck originally, swapped to a GT42-76 for 2 days till I blew it up, then went to a GT47-88.
Not my truck but my old setup on a different truck with some bling work.
At 23psi on my stock lightning longblock: