Gt47?

T

Twin Turbo T

New Member
Joined
Jan 22, 2003
Is any one running a GT4780 or 4788?:confused: How do they spool, compared to a PT88? Which AR. housing? Time,boost? Any info would be helpful? Thanks
 
Twin Turbo T said:
Is any one running a GT4780 or 4788?:confused: How do they spool, compared to a PT88? Which AR. housing? Time,boost? Any info would be helpful? Thanks
Click to expand...

Talk to Ted A., he should be able to give you some good information.
 
Twin Turbo T said:
Is any one running a GT4780 or 4788?:confused: How do they spool, compared to a PT88? Which AR. housing? Time,boost? Any info would be helpful? Thanks
Click to expand...

We can now build the GT47 on a T4 flange as well so it will spool very similar to the PT88. The PT88 is a good bit smaller and uses the older 7 blade TV series comp wheel. It doesn't quite flow what the GT47 can, but its still a nice piece. A GT47 with a T4 or the T6 flange is still a solid 8 sec turbo at weight. How fast are you looking to go?
 
JZ 97 SS 1500 said:
We can now build the GT47 on a T4 flange as well so it will spool very similar to the PT88. The PT88 is a good bit smaller and uses the older 7 blade TV series comp wheel. It doesn't quite flow what the GT47 can, but its still a nice piece. A GT47 with a T4 or the T6 flange is still a solid 8 sec turbo at weight. How fast are you looking to go?
Click to expand...

I know this. looking for more "hand on" info, guys that are running this turbo.
 
We are running the GT 47. So far I am very impressed with the power it makes. A lot of variables come into play at this level so it is crucial the whole combo is right to get the most out of it. It takes a good bit of tweaking the fuel tables and spark tables to get it spooled up somewhat fast. Right now I can go from just under 0 psi to 9 psi in about 2.3 seconds and that was at Oceola and it was pretty hot and humid and my tune was still a little fat on spoolup.
 
I asume this is an 88 compressor wheel, and #160 inj. ? Do you think that it spools faster than a PT88? I was just wondering about the stall on the convertor. Thanks, Ted A.:) good info.
 
could a gt42/76 and a 47/80 be swapped out without plumbing changes? mines a hybrid and the pipes will have to be custom.
 
chevyII said:
could a gt42/76 and a 47/80 be swapped out without plumbing changes? mines a hybrid and the pipes will have to be custom.
Click to expand...

If you want to go bigger and stick with the same plumbing in a GT42 frame, then the GT45F-78 is the biggest you can go. It has the larger 87mm turbine wheel, 78mm compressor wheel combination. Its a LDP turbine wheel as well and 11 blade design versus the 12 blade design of the GT45-DBB.
 
Hello Everyone. I just wanted to take a moment and let everyone know that we have been offering that turbocharger for a few years now. You can get a 78mm version (GT4578R) or there is one version that is slightly larger (GT4508R) that features an 80mm compressor wheel. Either version is available with a GT42 compressor cover (versus the larger GT47 compressor cover) and features a T4 exhaust housing. I believe we have a few customers that have run those turbos that post regularly on the board.

Regards,

Pete @ Precision Turbo
 
PTE Pete, I think the turbo that Jose is talking about GT45Fis a journal-bearing turbo. Does Precision offer a non-ballbearing GT45?
 
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