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My PT6265 build...

Old 12-17-09, 07:36 PM
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My PT6265 build...

I bought the car, one of the solenoids was messed up, and the 2nd turbo wasn't coming online, so I decided to go with a single turbo setup for reliability and performance reasons, I'm hoping to make around 470rwhp

The turbo has a .96 hotside, and is ball bearing as well, hopefully I see decent spool, if not, I'll go to a divided 1.00 hotside. I'm running 850/1300 setup with the FPD delete, as well as a rewired 255 in the tank....among many other supporting mods. Also gonna go the route of 'dudesmann's water injection setup preturbo....gonna see what the car will do on 93 octane and WI...I'd be happy with an 18psi tune.















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Old 12-18-09, 12:18 AM
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Looks like you have a divided manifold (typical eBay manifold?), why in the world would you go .96 NON-DIVIDED? You realize a 1.00 divided turbine housing on a divided manifold spools FASTER and makes MORE power? Even a .84 divided would have worked better then the .96 (much quicker spool with roughly same peak power under 1 bar of boost). It's a win win.

Sweet heat shield BTW and nice plumbing work and great choice of turbo (aside form the turbine housing).
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Old 12-18-09, 01:56 AM
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Originally Posted by RacerXtreme7 View Post
Looks like you have a divided manifold (typical eBay manifold?), why in the world would you go .96 NON-DIVIDED? You realize a 1.00 divided turbine housing on a divided manifold spools FASTER and makes MORE power? Even a .84 divided would have worked better then the .96 (much quicker spool with roughly same peak power under 1 bar of boost). It's a win win.

Sweet heat shield BTW and nice plumbing work and great choice of turbo (aside form the turbine housing).
The .96 is standard from PTE, the 1.00 divided isnt. He is saving money off the bat and seeing if spool is good enough, and if not, he can spend the extra and get a different housing. And the 1.00 isnt likely to make much if any more power than the .96.
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Old 12-18-09, 02:39 AM
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Originally Posted by RacerXtreme7 View Post
Looks like you have a divided manifold (typical eBay manifold?), why in the world would you go .96 NON-DIVIDED? You realize a 1.00 divided turbine housing on a divided manifold spools FASTER and makes MORE power? Even a .84 divided would have worked better then the .96 (much quicker spool with roughly same peak power under 1 bar of boost). It's a win win.

Sweet heat shield BTW and nice plumbing work and great choice of turbo (aside form the turbine housing).
ScorpionT answered it pretty well for me...I'd probably never run an .84...more heat and a crippled top end isn't worth the gains in spool.

To comment on the manifold yes it's the ebay manifold, I'm going to run it until it cracks. I have seen some who have had issues with them, and I have seen others who haven't had a problem at all. I just can't justify spending $1000+ on an exhaust manifold with probably less material cost and half the labor to make when compared to the exhaust manifold options during my 4 cylinder days of equal craftsmanship. Ill take my risk before digging into my resources.
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Old 12-18-09, 05:14 AM
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Good luck with the build. I am in the process of a 6765 build. Quick question... don't you think you will be close to maxing out that one fuel pump if you're looking to make around 470hp? why not just spend an extra hundo and ride out? also I don't think you will have an issue with spool time. its all pretty relative anyway.
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Old 12-18-09, 08:22 AM
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Neat build!

Is the heat shield one of those universal stainless steel bowls you see in the cheap tool stores? Always wanted to hack one up or tack a couple together for that purpose......if not please divulge its origin

This engine is all stock? No porting etc? Will be a good platform to see how these precision turbos spin up.
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Old 12-18-09, 08:34 AM
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Yeah that's a stainless pot heatshield, you can tell. pretty neat
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Old 12-18-09, 09:45 AM
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Originally Posted by hondahater View Post
Yeah that's a stainless pot heatshield, you can tell. pretty neat
LOL! I could steal one of those from my Moms kitchen. Is it just floating there or is it bolted down?
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Old 12-18-09, 09:49 AM
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Originally Posted by TheAsset View Post
I'd probably never run an .84...more heat and a crippled top end isn't worth the gains in spool.
If you were running a larger turbo I'd agree. But seeing as I've seen plenty of 500whp+ cars on a P-trim .84 divided. I'll kindly disagree. Last one on the dyno here did [email protected] on a stock unopened TII. Never fell flat. No crippled anything. Not knocking your build in any way. Just saying a .84 divided turbine is good for over 500whp at reasonable boost levels, and I'm sure ScorpionT will be the first to point out that a precision 65 will outperform the standard P-trim At least that's what precision tells us.

~S~
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Old 12-18-09, 10:55 AM
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Nice
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Old 12-18-09, 06:19 PM
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Originally Posted by w94rx7tt View Post
Good luck with the build. I am in the process of a 6765 build. Quick question... don't you think you will be close to maxing out that one fuel pump if you're looking to make around 470hp? why not just spend an extra hundo and ride out? also I don't think you will have an issue with spool time. its all pretty relative anyway.
I will probably end up upgrading the 2nd fuel rail, getting a 2nd pump, and putting 1600's in...I'm just not really sure on the limits of the stock FPR or when an upgrade is actually necessary, I've been getting mixed results while searching on here, Ill probably email the tuner and see what he prefers for my power goals

Originally Posted by classicauto View Post
Neat build!

Is the heat shield one of those universal stainless steel bowls you see in the cheap tool stores? Always wanted to hack one up or tack a couple together for that purpose......if not please divulge its origin

This engine is all stock? No porting etc? Will be a good platform to see how these precision turbos spin up.
The engine has a mild SP from PFS, the pot is just a little $12 gig I bought from Target here, I mocked it up and drilled the holes to mount it, Ill pop a few pics of that process up.

Originally Posted by Zero R View Post
If you were running a larger turbo I'd agree. But seeing as I've seen plenty of 500whp+ cars on a P-trim .84 divided. I'll kindly disagree. Last one on the dyno here did [email protected] on a stock unopened TII. Never fell flat. No crippled anything. Not knocking your build in any way. Just saying a .84 divided turbine is good for over 500whp at reasonable boost levels, and I'm sure ScorpionT will be the first to point out that a precision 65 will outperform the standard P-trim At least that's what precision tells us.

~S~
Smaller hotside = more heat...regardless of the performance I was aiming more towards reliability in terms of reducing heat as much as possible...Ill sacrifice a little spool time. I as well am not knocking the .84 hotside, but I know its probably the lower limit for hotside choice, I just enjoy a little foreplay before the fun begins
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Old 12-19-09, 12:02 AM
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After doing some chatting, I guess ill shoot for 410-420rwhp with this setup, otherwise I'd need to upgrade to 1600's, add another pump, and a FPR to the setup to dance around the 500rwhp area, and that's easily another $400 I don't feel like spending :/ I guess Ill see what I can get out of the fuel setup I have at the moment (Reweired 255 -->850/1300 -->FPD Delete)
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Old 01-17-10, 09:46 PM
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Finally got the downpipe fitted how I like it, it'll be getting welded tomorrow. The little cardboard box is probably where I'll try and fit a reservoir for my water injection, just gonna see if I can find something that dimension. Piping should be done real soon once I get a hold of a 2.5" 45 degree coupler.





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Old 01-17-10, 11:28 PM
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I'm loving that heat shield!
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Old 01-17-10, 11:32 PM
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whats the square box for?
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Old 01-17-10, 11:40 PM
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Originally Posted by BigTurbo74 View Post
I'm loving that heat shield!
Yea I can't wait to see what it does with some real heat under it.

Originally Posted by Indian View Post
whats the square box for?
I was figuring out what size reservoir I was going to run for the water injection. That box ended up being 8x5x5 roughly. I did a few calculations and it should sustain 350cc's at full tilt for more than a few minutes but we'll see what happens in the real world, if anything I may try running a reservoir where the coolant overflow is
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Old 01-19-10, 09:20 PM
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Looks awful tasty! i am in the process of doing a Billet PT6765 build, i went with the H cover .75/.96 AR turbo. the exhaust will be done tomorrow. getting a custom 4 inch from the turbo back. it was a real tight fit putting that turbo in! Hope it really screams, i should have pictures of it all tomorrow. I do enjoy me some precision turbos!
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Old 01-21-10, 07:09 PM
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I'm in the middle of a 6265 build my self but due to no tuners around it might be awhile before I get running good. I also noticed your turbo is watercooled Precision is now going with a non watercooled chra. I will be shooting for the 500 mark myself.
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Old 01-21-10, 08:33 PM
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Originally Posted by ikpfal View Post
I'm in the middle of a 6265 build my self but due to no tuners around it might be awhile before I get running good. I also noticed your turbo is watercooled Precision is now going with a non watercooled chra. I will be shooting for the 500 mark myself.
Yea I believe their new line is the GTX turbos or something along those lines, I feel more comfortable with coolant running through it as well.

I just really wish I could find a compressor map for the turbo, my roommate is running the same turbo on his motor (2JZ) with the .82 hotside and made 505rwhp at 18psi and 640rwhp at 25psi on race gas....What's the usual power difference between a piston and rotary motor?

Last edited by TheAsset; 01-21-10 at 08:36 PM.
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Old 02-21-10, 02:52 AM
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Its alive!!! ...Got a few kinks to workout but happy to hear her running again.
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Old 02-21-10, 08:16 AM
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Originally Posted by TheAsset View Post
Yea I believe their new line is the GTX turbos or something along those lines, I feel more comfortable with coolant running through it as well.

I just really wish I could find a compressor map for the turbo, my roommate is running the same turbo on his motor (2JZ) with the .82 hotside and made 505rwhp at 18psi and 640rwhp at 25psi on race gas....What's the usual power difference between a piston and rotary motor?
Glad to see it done man. Enjoy the car to the max.

And as far as determining the hp difference in piston vs rotary look at a few of Howard Colemans threads. He breaks down each turbo and what it will make on different motors. I got a buddy with a 3.0l inline 6 in a bmw m3 that makes 600hp at 19psi on a gt4094. So we are way off from that.

Good luck man.
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Old 02-21-10, 09:51 AM
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"What's the usual power difference between a piston and rotary motor?"

based soley on equal AIRFLOW...

a 600 rwhp piston engine equates to a 462 rwhp rotary.

this does not necessarily put the rotary at a disadvantage as it will flow MORE air than a piston engine based on equal displacements. so you just run a larger turbo.

a GT4094 makes 80 pounds of air at 33 PSI. at 80 the rpm plot is vertical indicating the turbo is maxed out.

80 makes 800 piston hp and 615 rotary hp. (you just divide by 1.3... in other words,

80 times 10 = 800 piston hp divided by 1.3 = 615 rotary.

that's why we need to understand this when buying a turbo... we need to use OUR metrics.

howard
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Old 02-21-10, 10:14 AM
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I knew you would chime in Howard. Thanks
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Old 02-21-10, 01:11 PM
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Originally Posted by Howard Coleman CPR View Post
"What's the usual power difference between a piston and rotary motor?"

based soley on equal AIRFLOW...

a 600 rwhp piston engine equates to a 462 rwhp rotary.

this does not necessarily put the rotary at a disadvantage as it will flow MORE air than a piston engine based on equal displacements. so you just run a larger turbo.

a GT4094 makes 80 pounds of air at 33 PSI. at 80 the rpm plot is vertical indicating the turbo is maxed out.

80 makes 800 piston hp and 615 rotary hp. (you just divide by 1.3... in other words,

80 times 10 = 800 piston hp divided by 1.3 = 615 rotary.

that's why we need to understand this when buying a turbo... we need to use OUR metrics.

howard
You're a good man Thanks for chiming in.

Ill def try and get some info and numbers up once I get the car tuned
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Old 03-03-10, 03:16 PM
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Car took it's first trip around the neighborhood today Waiting on the DLI/Wideband to show up and then all that's left on the list is the pumpless water injection and a tune. Feels good to get some face time in again haha
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