difference between q-trim s-trim and x-trim

[WhiteT78Supra]

If your motor is 231-235 CI and you want to maintain the 3-bolt style turbine housing, then you are currently limited to the GT-Q turbine wheel, until someone designs a larger 3-bolt turbine housing to work with the GT-S and the X trim turbine wheels. PTEs current line of 3-bolt Buick turbine housing turbos are made for the GT-Q turbine wheel.

Patrick,

Actually, Innovative makes a 3-bolt style turbine housing that works with their X-Trim wheel...

 

[RUQWKNF]

Interesting.
I guess the only real world testing at this power level would be what Dave Bamford reported on his TSM car when he tried the ITS 70 X trim.

Interesting indeed.

Patrick

 

[nailheadpowered]

what about going to a 4 bolt setup? as i was thinking of just going to a 76x trim innovative dbb and use an adapter for now to my 3 bolt? would it be beneficiall go to a 4 bolt setup? as i have the ability to go either way staying with the 3 bolt or changing completely over to a 4 bolt and would the 76 be too big? and is the Q trim suffecient or should i seriously consider the S/X trim setup? I should state that i am taking my turbo to innovative to have it redone, I just need to decide on 74 or 76 and which trim and housing.

 

[nailheadpowered]

what was that?

 

[RUQWKNF]

Well the short and skinny of it is his car ran 9.23 @147mph with the PT70 GTQ and if I remember correctly the fastest it ran with the Innovative 70mm X-trim was 9.50's @142-143mph... Keep in mind this is with the Buick 3-bolt style configuration.. If I remember correctly he said the car needed more boost with the X-trim to make the same power as the GTQ so I'm guessing this means on the Buick V6 which has heads that don't flow very well you can't take advantage of the more efficient wheel.. I know on the 2JZ motors many guys run upwards of 40lbs of boost and because of the high flowing 3V head design it can take advantage of a more efficient wheel like the X-trim.

Above is what I was referring too and his motor was a 248 CI stroker 109 setup.

If you know your stage motor won't be far off, then go with either the 74 or 76 GTS with dbb from PTE. You will have to change over the downpipe to a v-band setup and an external wastegate setup on the cross over pipe, even if you run a 3-4 bolt adapter flange on 3-bolt headers.

The 74 will have a more useable power band for the smaller motor than the 76 will. The 76 is a more peaky compressor wheel, where as the 74 will make more power over the entire rpm range. I prefer the 74 on a street car and the 76 on an all out stage II race car where rpm and cylinder head flow plays a significant factor. I also prefer the Garrett dual ball bearing cartridge over all of the other ball bearing manufacturers out there.
No matter what, even with ball bearings, on a 235ci 109, you will still need a high stall converter to make it rip on the street. Then again, you could use a 3500 stall and let it be the poor mans traction control.
I'm done.

Patrick

 

[nailheadpowered]

WOW thanks for the info, my setup is pretty good at the moment short of major upgrades i.e. 109 30 over JE pistons billet crank and all 4 billet caps ported and polished heads with large valves ported intake cam headers with external 44mm tial wastegate attached to the passenger header 70mm tb and plenum with 83lb inj fast xfi razors alky control and im installing a 3800 stall nonlu converter in my modified 200r4 etc. etc. im looking to go to the TA heads with a 224/224 roller cam want to be sure when i get a turbo it will work well with future upgrades/stage setup thanks for the info and the explanation as it is hard with so many options of turbo's and most of all getting good sound advice. thanks.

 

[John Wilde]

poor mans traction control.

Patrick

This is making me want to try a 6152 or a 6776BB with my stock D5...
Yes I am crazy like that....

 

[nailheadpowered]

LOL hell im just trying to figure out the best turbo for my car and it seems to be the 74dbb now to figure out if i should stay with the 3 bolt or go with a 4 bolt? and stay with the basic dp setup or change to the v-band setup? damn this is racking my brain LOL.

 

[JZ 97 SS 1500]

Their is alot more difference between those turbine wheels then has been discussed. Also the X trim is a CNC cut down version of the R. R-trim is a full 100trim wheel.....sucks on small cube cars.