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My Gtr Build And Split Pulse

AaronGTR32

By AaronGTR32,
in Engines & Forced Induction

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AaronGTR32 Apprentice

AaronGTR32

Posted
Posted

Hey guys, im currently in the middle of building my r32 gtr, its getting all the supporting mods like bigger fmic, injectors, computor, pump, sump, etc.. only difference was i chose to run a single turbo with a 6boost manifold, split pulsed, t3 flange with a gtx3582r with a split pulsed .82 housing.

Now my builders and tuner strongly recommended me to go bigger with the exhaust housing go to a 1.06. Although there are no split pulsed 1.06 for gtx35 in t3 flange.

i guess i should mention the engine is getting rebuilt with, tomei type b cams, forged pistons, forged rods and bearings. they said there is vertualy not much difference in turbo lag between the .82 and 1.06 with the rb26 hence the suggestion of changing.

Is my turbo really gunna run out of breath with the .82 housing on a non stroked engine?

Should i change my housing the a 1.06 open t3 and will manifold work fine still with that setup? been 2x 40mm waste gates too cause of the split pusle setup.

Or should i keep my .82 split pulse setup?

I just wanna do it right the first time, thanks guy for any input.

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https://www.sau.com.au/forums/topic/388574-my-gtr-build-and-split-pulse/
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R31Nismoid Grand Master

R31Nismoid

Posted
Posted

.82 split pulse will indeed be small. It's not the "normal" size of a .82 from a single housing - that is the point they are making.

Most generally seem to go the 1.06/T4 split pulse if heading down that road. Or a .82 in a non-split setup.

AaronGTR32 Apprentice

AaronGTR32

Posted
  • Author
Posted

Thanks nismoid. I kinda understand now.

so is there is a difference in size between the split pulse .82 and open .82? i thought it was ratio and it would be the same dispite the divider in the middle.

Does that mean my manifold is not good? should i bother getting the t4?

or

its fine just switch it to a 1.06 open housing?

I really wish i went the t4 flange, kyle from 6boost suggested that the t4 is probably too big and stick with the t3 .82 housing. Im not blaming him. just wished i did my research before hand. :( :( :( :( :(

god dayummmmmmm

scotty nm35 Grand Master

scotty nm35

Posted
Posted

Im running an open 1.06 Tial rear on a GTX3071, I would say there would be 2-300 rpm difference in spool between that and the 0.82.

Go the larger housing to keep exhaust temps down, especially if you plan to ramp the boost up.

An open housing will bolt up to the T3 split manifold no problem. I wouldnt worry about the flange.

AaronGTR32 Apprentice

AaronGTR32

Posted
  • Author
Posted

Yeah thanks for that mate, i did see that but because its from america and ive had bad experiences buying shit from over sea's and not fitting etc. On the other hand australia gets our turbo's from america aye? so it would work?

AaronGTR32 Apprentice

AaronGTR32

Posted
  • Author
Posted

Im running an open 1.06 Tial rear on a GTX3071, I would say there would be 2-300 rpm difference in spool between that and the 0.82.

Go the larger housing to keep exhaust temps down, especially if you plan to ramp the boost up.

An open housing will bolt up to the T3 split manifold no problem. I wouldnt worry about the flange.

ah ok thanks heaps for the advice man, im gunna check out that t3 split pulse 1.06 housing on that website black br32 sugggested (from america). if its no good ill just get the open 1.06.

thanks :)

JonnoHR31 Grand Master

JonnoHR31

Posted
Posted (edited)

im currently using the t4 version of that ATP housing. i purchased it off their housing website any problems.

it fits and works but the casting isnt up to the same standards as the garrett housings. having said that though they seam to work fine and perform well. i had a few troubles with fitment but all of them were due to the massive T4 flange and manifold design, with a T3 flange it should be easy.

Edited by JonnoHR31
AaronGTR32 Apprentice

AaronGTR32

Posted
  • Author
Posted

im currently using the t4 version of that ATP housing. i purchased it off their housing website any problems.

it fits and works but the casting isnt up to the same standards as the garrett housings. having said that though they seam to work fine and perform well. i had a few troubles with fitment but all of them were due to the massive T4 flange and manifold design, with a T3 flange it should be easy.

ah thats good to no, atleast i can trust to buy off them, How long till u got the part?

Thats weird cause on the caption for the housing it says "GT35R 1.06 A/R T3 divided (twin-scroll) turbine housing. Garrett casting, 3" V-band outlet."

So it isnt made by garrett? So there was no problem fitting it to the turbo, just to the manifold? why is that i thought its just 4 bolts?

Thanks heaps aye

JonnoHR31 Grand Master

JonnoHR31

Posted
Posted (edited)

yer your right that is a garrett casting, sorry. in that case it'll be fine.

the T4 flange fouled on one of the compressor housing bolts (i couldnt rotate it out of the way) so i had to leave it out and undoing/tightening the oil feed requires taking off the compressor housing. also due to the design to seperate the turbo from manifold i had to take both out of the car with the lines attached and do it on the ground, impossible to get to on the motor. but its from a combination of the massive T4 flange and the design of the hks low mount manifold.

edit: cant remember how long postage took sorry, was way too long ago

Edited by JonnoHR31
GTScotT Grand Master

GTScotT

Posted
Posted

Im pretty sure if you call Kyle he will be able to change the flange for you to T4 if needed

Im also fairly certain a lot of manifolds are coming out T3/T4 split pulse friendly. IE with a T4 sized base plate and T3 split pulse ports and bolt holes to suit both. I am under the impression running a T4 split pulse on a manifold like that wouldnt hurt anything, probbly best to talk to kyle about that though.

AaronGTR32 Apprentice

AaronGTR32

Posted
  • Author
Posted

Im pretty sure if you call Kyle he will be able to change the flange for you to T4 if needed

Im also fairly certain a lot of manifolds are coming out T3/T4 split pulse friendly. IE with a T4 sized base plate and T3 split pulse ports and bolt holes to suit both. I am under the impression running a T4 split pulse on a manifold like that wouldnt hurt anything, probbly best to talk to kyle about that though.

yeah true, bit late now tho cause my build is in progress :(

Ah really wish i new that before hand lol.

AaronGTR32 Apprentice

AaronGTR32

Posted
  • Author
Posted

yer your right that is a garrett casting, sorry. in that case it'll be fine.

the T4 flange fouled on one of the compressor housing bolts (i couldnt rotate it out of the way) so i had to leave it out and undoing/tightening the oil feed requires taking off the compressor housing. also due to the design to seperate the turbo from manifold i had to take both out of the car with the lines attached and do it on the ground, impossible to get to on the motor. but its from a combination of the massive T4 flange and the design of the hks low mount manifold.

edit: cant remember how long postage took sorry, was way too long ago

ah right, haha that is a bit of mucking around, glad to hear it worked out for u in the end tho. i sent them a message about it, if not ill just go a t3 1.06 open housing.

BMYHOE Proficient

BMYHOE

Posted
Posted

i have a t4 divided 1.06 ATP rear housing on a gtx35, like Jonno said there are a pain but nothing you should run away from.

lucky me i can get all my comp cover bolts on and i actually ended up making a 200 degree open end spanner to help do up the lines still a bitch but works.

im running a 6boost t4 divied manifold and bolts up not a prob.

AaronGTR32 Apprentice

AaronGTR32

Posted
  • Author
Posted

i have a t4 divided 1.06 ATP rear housing on a gtx35, like Jonno said there are a pain but nothing you should run away from.

lucky me i can get all my comp cover bolts on and i actually ended up making a 200 degree open end spanner to help do up the lines still a bitch but works.

im running a 6boost t4 divied manifold and bolts up not a prob.

Ah really, thanks ill probably order the t3 1.06 divided off ATP then as i just discovered the mark up price on these housings is huge in australia. Its a bit late to send my manifold up to kyle to get it changed to t4, maybe one day when i upgrade to a bigger turbo. (hopefully it can be done without dramas).

the gtx35 ure running it on rb26? how is it? sound good? what boost u running it at? when does full boost kick it? you happy u chose that turbo?

thanks heaps for the info mate.

BMYHOE Proficient

BMYHOE

Posted
Posted

havnt got any numbers yet, the set up is on a RB30with 26 head dry sump motor.

i went this setup cause i thought it would be the most responsive setup but still achieve 500-550rwhp on E85

its all in a S14a silvia.. track car been setup for curcuit / time attack

Lithium Grand Master

Lithium

Posted
Posted

Lol thats overkill for 500-550whp on E85 man - should still see >600whp on a DD if you leaned on it a bit. Just be a bit wary of EGTs on the track/drift, one of the guys here had one on his SR20 S15 running 600-700hp @ hubs on E85 and the divider in the ATP TS housing cracked... not ideal.

BMYHOE Proficient

BMYHOE

Posted
Posted

yeah i know just want it to be reliable as well and be able to add more power if needed for different curcuits like Eastern creek

thats not good about the divider, i think ill be going individual EGT sensors on the manifold runners to make sure tune is as reliable as it can be

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