GT2871 USERS. SR motor

[slider2828]

You know seriously idaho if I were to do it all over again. I wouldn't do an sr... LS1 and call it a day... On track especially when its hot SR's can't run 18PSI... it would over heat for sure... I eman I have 19 row setrab oil cool and all the cooling venting and bla bla bla... still its not great..... I dunno for fun on teh street SR for sure... for track, its gotta be LS1 or somethign that doesn't create so much heat.... you can ask WhiteGLX about that....

[idahotuner]

i dont track my car though. just street and highways driving. ls1 is sickthe thought went through my head a couple times
bt i liek the sound of a 4cylinder turbo spooling

[longfellow]

You dont need 18psi on track when 14psi will do just fine. There are a lot of people who track SR cars with no real issues. I also think the Pignose front bumper creates a huge cooling problem.

[slider2828]

Originally Posted by longfellow

You dont need 18psi on track when 14psi will do just fine. There are a lot of people who track SR cars with no real issues. I also think the Pignose front bumper creates a huge cooling problem.

Uh... you telling me that I don't need the power at 18psi? why wouldn't I use it if its tuned for it?

Pignosed was gone a long long LOOOONG time ago....



Yes under panel and over panel is there too to direct air... Hoping a swirl pot will help.....

[boost]

i was at the same event with my beater s13 hatch (multi grey colored). i was wondering which car was yours. i was thinking it was the white one originally.

[slider2828]

O I remember... I am waiting for the some drifting pictures... but yeah... say wassup next time...

[longfellow]

Since you're having heat issues and don't want to lower the boost I would suggest ceramic coating as your next option to keep temps down.

A guy I know runs track days at Sebring in the middle of summer here in Florida and doesn't have too much of an issue after he ceramic coated pretty much everything on the hot-side of the motor. He said the temps in the engine bay dropped by more than 20*

You could also try running E85 since it keeps the combustion charge way cooler.

[idahotuner]

i wish we had e85 here

[S13 curtis]

Originally Posted by idahotuner

i wish we had e85 here

come down to florida

[idahotuner]

what do you guys think about the t2 gt3071r. i am seeing if they have a .64 version versus the .86. the problem i noticed with my gt2871r .64 was back pressure cause my pistons to get screwed up on the exhaust side but they were stock pistons. seems like a gt30 wheel with housings about the same size as gt2871, will flow more making a little more top end, with about the same boost response.

make about 400 to the wheels on 92 octane, with a 2.2 liter and ported head on the exhaust side. and once the center housing got spooling even if it took a littler longer it will have more rotational momentum and inertia.

[S13 curtis]

Originally Posted by idahotuner

what do you guys think about the t2 gt3071r. i am seeing if they have a .64 version versus the .86. the problem i noticed with my gt2871r .64 was back pressure cause my pistons to get screwed up on the exhaust side but they were stock pistons. seems like a gt30 wheel with housings about the same size as gt2871, will flow more making a little more top end, with about the same boost response.

make about 400 to the wheels on 92 octane, with a 2.2 liter and ported head on the exhaust side. and once the center housing got spooling even if it took a littler longer it will have more rotational momentum and inertia.

the 3071.64 will still have alot of back pressure, if anythhing go with the .86 and do an external wastegate or you can be like me and get the ATP .72 back housing

[idahotuner]

Originally Posted by S13 curtis

the 3071.64 will still have alot of back pressure, if anythhing go with the .86 and do an external wastegate or you can be like me and get the ATP .72 back housing

hmmmm is that internal or external.

if they made a bottom mount manifold that was externally gated i would like to see it.

can you give me a link to it.
yeah and i agree about the .86 being better after doing some more reading. i wouldnt mind full boost around 4200 becasue i will rev out to 8

[S13 curtis]

Originally Posted by idahotuner

hmmmm is that internal or external.

if they made a bottom mount manifold that was externally gated i would like to see it.

can you give me a link to it.
yeah and i agree about the .86 being better after doing some more reading. i wouldnt mind full boost around 4200 becasue i will rev out to 8

I upgraded my compressor housing and my exhaust housing went from the .64 to .72 external V44 backside and went to a GT3071 compressor housing.









I still havent had it mounted yet but it should be pretty fun once i get it running. especially since its running on ethanol.

[s15specR]

good stuff man, lets see that mounted!

[jspaeth]

Originally Posted by s15specR

good stuff man, lets see that mounted!

Yeah, I too would be interested to see what difference the 3071 compressor housing and 0.76 exhaust housing have on the power/spool characteristics versus the typical and 0.64 housings.

[idahotuner]

Originally Posted by S13 curtis

I upgraded my compressor housing and my exhaust housing went from the .64 to .72 external V44 backside and went to a GT3071 compressor housing.









I still havent had it mounted yet but it should be pretty fun once i get it running. especially since its running on ethanol.

so is that a gt2871 wit ha gt3071 housing on the front an an atp t2 external gated turbine housing?
i cant find that housing turbine housing? how much did that whole combo cost you. if some one bought the center section, they could combine them all for about the same price as a normal gt3071 seems

[idahotuner]

http://zilvia.net/f/tech-talk/230385...mm-wg-t2x.html found the link. i wonder if they will let you switch out when you order so you dont have to order both sections. i might have to call them tomorrow and ask.

[idahotuner]

CHRA - Garrett GT3071R-WG with 90 trim 56.5mm turbine wheel : atpturbo.com think i might pic up this center section, then peice it together. but ifs yours was originally a .64 a/r then it is the 84 trim, wonder waht difference the 90 trim would make

[idahotuner]

difference is the 56.5mm turbine vs the 60mm turbine
so i found this center section Garrett Turbo Replacement CHRA - GT3071R [CHRA-GT3071R] - $827.00 : Himni Racing, Turbocharger, Turbo, Garrett, Turbo Kit, GReddy, Mazda RX-7, HKS, Apexi, TiAL, TurboXS, TurboSmart, Flange, Turbonetics, Exhaust, Intercooler, ACT, Intake
combine it with Special Turbine Housing T25-EWG-44 : atpturbo.comCompressor housing for GT3071R with 71mm 56 trim wheel - 4" Inlet and 2" outlet : atpturbo.com and you pay exactly the same price asa gt3071 t2 but have a better turbo, then add in a tubular maifold, and the turbo outlet that is divdied as if it was for an internal gated turbo, seems like it would keep flow better coming out of the turbine.

i bet this set up full boost by 4000 rpm, and make a around 450 on pump gas

[sukimoto]

Originally Posted by idahotuner

difference is the 56.5mm turbine vs the 60mm turbine
so i found this center section Garrett Turbo Replacement CHRA - GT3071R [CHRA-GT3071R] - $827.00 : Himni Racing, Turbocharger, Turbo, Garrett, Turbo Kit, GReddy, Mazda RX-7, HKS, Apexi, TiAL, TurboXS, TurboSmart, Flange, Turbonetics, Exhaust, Intercooler, ACT, Intake
combine it with Special Turbine Housing T25-EWG-44 : atpturbo.comCompressor housing for GT3071R with 71mm 56 trim wheel - 4" Inlet and 2" outlet : atpturbo.com and you pay exactly the same price asa gt3071 t2 but have a better turbo, then add in a tubular maifold, and the turbo outlet that is divdied as if it was for an internal gated turbo, seems like it would keep flow better coming out of the turbine.

i bet this set up full boost by 4000 rpm, and make a around 450 on pump gas

i like this

[idahotuner]

and here you can buy the turbo for 1160 dollars. just select the correct options, i wonder if the 4 inch inlet really has any benifit over the 3. MAF to 3inch pipe, to 3 in inlet seems like would have the best flow. not to mention it would probably be cheaper.

Garrett GT3071R Ball Bearing Turbo (450 HP) [700382-3 , 700382] - $1,160.00 : Himni Racing, Turbocharger, Turbo, Garrett, Turbo Kit, GReddy, Mazda RX-7, HKS, Apexi, TiAL, TurboXS, TurboSmart, Flange, Turbonetics, Exhaust, Intercooler, ACT, Intake

[codyace]

Originally Posted by idahotuner

hey cody, which trim you running 56?

On the compressor side, yes the 56 trim A/R. However let it be known that A/R changes on the compressor side typically make for less to zero difference in HP, assuming th rest is the same. Will it change a few aspects? Yes technically, but it won't effect spool up and that sort. It's really interesting to read about how little an A/R change on a compressor effects power...very unlike the turbine sections which can make large differences.

Originally Posted by idahotuner

my sr i am putting together right now is a 2.2 mazworx block, last set up i posted earlier in this thread on a stock block i made 416 with a gt2871r .64

I still wish they never used that correction factor with your dyno. Shame on that dyno shop.

This is why when I run the dyno days, it's always give people uncorrected and STD numbers. It's amazing to see people running wild CF's to make pwoer, it's just not fair.

Originally Posted by longfellow

You dont need 18psi on track when 14psi will do just fine. There are a lot of people who track SR cars with no real issues. I also think the Pignose front bumper creates a huge cooling problem.

Correct. I run 12 and sometimes 16 when I wanna pass a higher power car that parks in the corners. No issues here after 4 years.

Originally Posted by idahotuner

what do you guys think about the t2 gt3071r. i am seeing if they have a .64 version versus the .86. the problem i noticed with my gt2871r .64 was back pressure cause my pistons to get screwed up on the exhaust side but they were stock pistons. seems like a gt30 wheel with housings about the same size as gt2871, will flow more making a little more top end, with about the same boost response.

I don't like the idea with such a small housing. However the backpressure didn't cause any 'ruining' on the pistons, that is what detonation was. Certainly backpressure can help induce a detonation prone sitution, but typically the detonation is already there.

Originally Posted by idahotuner

so is that a gt2871 wit ha gt3071 housing on the front an an atp t2 external gated turbine housing?

On paper it sounds like a fantastic idea, but as before, the biggest drawback has always been the turbine housing as the restriction. With a proper backside it may prove to be a 'hot setup'. For me, it was just easier to adapt a external gate onto the manifold than spend all the cash again hehe.

[jspaeth]

Originally Posted by codyace

On the compressor side, yes the 56 trim A/R. However let it be known that A/R changes on the compressor side typically make for less to zero difference in HP, assuming th rest is the same. Will it change a few aspects? Yes technically, but it won't effect spool up and that sort. It's really interesting to read about how little an A/R change on a compressor effects power...very unlike the turbine sections which can make large differences.

Cody, I am NOT CERTAIN, but I think you might be off a little here on your explanation.

From what I recall, the trim of the compressor wheel refers to the ratio of the area of the inducer to exducer.

On the 2871R, the exducer is 71 mm, so all that can change with different trims is the inducer size of the wheel.

But you were referring to "56 trim A/R"

I may be wrong, but I think A/R of the housing is completely different than the trim of the wheel.


And if you look on Garrett's website at the compressor map of the two different compressor wheel sizes:






The 56 trim does flow a little bit more than the 52 trim, but the difference is small.

[idahotuner]

i am trying to find something that will get me about the equivalent of 400 to the wheels with out running on the jagged edge of efficiency for the turbo but still have nice response.

while keeping it bottem mount for money savings

[MandTPhotography]

The fuck is this?


GT28 TURBO CHARGER +8PSI INTERNAL WASTEGATE T25 .86 A/R : eBay Motors (item 140339705839 end time Mar-11-10 18:56:04 PST)

[jspaeth]

Originally Posted by MandTPhotography

The fuck is this?


GT28 TURBO CHARGER +8PSI INTERNAL WASTEGATE T25 .86 A/R : eBay Motors (item 140339705839 end time Mar-11-10 18:56:04 PST)

Huh? That looks pretty legit to me.

That there is one of them "Turbo Chargers".

[MandTPhotography]

About as legit as a malaysian garage plastic surgery.


Half the shit on the store is misspelled.

[codyace]

Originally Posted by MandTPhotography

About as legit as a malaysian garage plastic surgery.


Half the shit on the store is misspelled.

What a fitting name

"Mirage Turbochargers"

lol!

[2fast4y0u]

figured i would put this issue in here because they are some smart ones posting here

so i drove my car home for the first time yesterday. let it sit in my garage and went to start it this morning...and it flooded like super style. pulled the plugs and they are soaked. so i cleaned em off, pulled the injector clips and turned the key. started up and ran for a sec, plugs the injectors back in and BAM, she starts and runs great.

now, where i keep my car in my shop, its never under 60 degrees and it was at my house in my garage where it got to..i dont know 40ish last night.
did the cold start cause this problem?

[codyace]

THat should be posted in general section, not here.

ps: that small temperature difference wouldn't make much of an issue in regard to the car flooding. check timing/coupler vacuum leaks and unsure your tune/ecu is correct.