Rb25 Manifold/Turbo question.

[John Bristot]

I did some searching, and I didn't find the answer that I was looking for. I'm thinking about upgrading to a larger turbo. What turbos can I retain the stock manifold with not clearance issues(a/c etc)? I'm not looking for crazy power(300-350ish) I just want good spool. Would a GT30r be a good one? My main concern is to retain the stock ex. manifold.

Thanks once again.

[chixwithtrix]

I have a HKS 2835 on a stock manifold, but it is not in the 240 yet. It fit in the skyline it used to be in fine. The engine was dyno'd at 390 hp.

[John Bristot]

Cool. Looks like a nice a turbo. Only problem is that HKS turbos have a not so nice price tag.

[Neejay]

lol True. Any idea as to which one would be similar but still fit on the stock manifold?

[ANVIL]

im thinking about getting one from jgycustoms. they have internally waste gated turbos for stock replacement in a few different trims. i havent looked too much into them but they say stock replacement.

im probablly going to get a new turbo this winter or at least before next years race season but im looking to retain my current piping/exhaust and stay with an internal wastegate setup.

i was also thinking about getting an hks from a local dealer here, but yeah the price tag is up there as far as comparasion to others. i might try to make a reasonable deal with him for turbo/injectors and dyno tune...

if anyone else has any other good options post up,.

[Darius]

Get a Garrett 3071R with a .64 exhaust housing.

And the JGY turbo housings are the same as those from Australia that are pretty much a direct bolt-on. They at least have the same exhaust housing bolt pattern.

[John Bristot]

I'm at work so I can't go look at the motor, but the stock setup has a internal wastegate instead of a external right? If so, that would mean I would have to get the tubo listed above internally wastegated correct?

[ANVIL]

im looking for around 400 whp, can anyone recommend a good turbo for me? dont want anything too laggy

[ANVIL]

yes stock turbo is internally waste gated. you dont HAVE to get one internally waste gated but its more of a direct bolt on that way. im still a n00b about turbos but to my understanding external you would need more work into it to get it to work. you would have to get a waste gate and a manifold for external waste gate. probablly have to redo the turbo dump and also figure out what you would want to do with the waste gate dump.

[Darius]

Yes, external gate is way more complicated and more expensive when the stock manifold is setup for an internal gate. You don't necessarily need a new manifold though. Many people have welded wastegate flanges onto the stocker. Look up Gavster's build on zilvia. Should be on a page in the high 30's.

Even if you get a turbo with a different exhaust housing, you're still going to have to have a new elbow and down pipe fabbed up to fit properly. Nothing is ever as easy as bolting parts on with a turbo car.

[chixwithtrix]

im looking for around 400 whp, can anyone recommend a good turbo for me? dont want anything too laggy

HKS 2835 pro s is a good turbo for your goals, like I said, the engine I bought was dyno'd at 390 whp with it before I bought the setup used...thats the only reason I have an HKS turbo. You can probably get the same turbo just from Garrett. Small enough to spool fast too, I'll be using it for drift.

[John Bristot]

Yes, external gate is way more complicated and more expensive when the stock manifold is setup for an internal gate. You don't necessarily need a new manifold though. Many people have welded wastegate flanges onto the stocker. Look up Gavster's build on zilvia. Should be on a page in the high 30's.

Even if you get a turbo with a different exhaust housing, you're still going to have to have a new elbow and down pipe fabbed up to fit properly. Nothing is ever as easy as bolting parts on with a turbo car.

I will be using the Syko kit. I wonder if the elbow that comes with that kit will work. I sent SYKO an email about it.

[John Bristot]

Get a Garrett 3071R with a .64 exhaust housing.

And the JGY turbo housings are the same as those from Australia that are pretty much a direct bolt-on. They at least have the same exhaust housing bolt pattern.

Can you tell me if this is the right one? Do I need the default housing? Do I need any of the options they let you choose?

http://www.atpturbo.com/Mercha...e=GRT

[ANVIL]

HKS 2835 pro s is a good turbo for your goals, like I said, the engine I bought was dyno'd at 390 whp with it before I bought the setup used...thats the only reason I have an HKS turbo. You can probably get the same turbo just from Garrett. Small enough to spool fast too, I'll be using it for drift.

do you know what the hp range is on that?

[Darius]

That looks like it only comes in a T25 inlet. The stock manifold is a T3 inlet so you'll need to choose from this page.

http://www.atpturbo.com/Mercha...e=GRT

[chixwithtrix]

do you know what the hp range is on that?

no, not off the top of my head, you might be able to go on Garrett, HKS, or other manufacturer's website and see...and for any other turbo for that matter

[John Bristot]

That looks like it only comes in a T25 inlet. The stock manifold is a T3 inlet so you'll need to choose from this page.

http://www.atpturbo.com/Mercha...e=GRT

So I would need the .63 A/R housing with the T3 internal wastegate 5 bolt housing?

Are there any clearace issues?

[silviasgp06]

chixwithtrix, do you have access to the dyno sheet, ide like to know how fast the hks 2835 spools. ill eventually be driving my rb25 in drift and response is what im looking for. right now im looking at using the hy35 holset turbo,

john you should look into the HX/HY 35 holsets, very similar stats to the gt30(or was it the gt35) but they are great for 350 to 450 for about +/- $200 plus rebuild. spools from 3600-4000 i think. there alot of notes on nico about them.

[John Bristot]

chixwithtrix, do you have access to the dyno sheet, ide like to know how fast the hks 2835 spools. ill eventually be driving my rb25 in drift and response is what im looking for. right now im looking at using the hy35 holset turbo,

john you should look into the HX/HY 35 holsets, very similar stats to the gt30(or was it the gt35) but they are great for 350 to 450 for about +/- $200 plus rebuild. spools from 3600-4000 i think. there alot of notes on nico about them.

Thanks for the info. I've been reading about them.

[Darius]

Then you'd need a flange like this to fab up a down pipe with dump pipe. Probably want to recombine the two by welding upstream of the steering shaft. This is where the creativity begins. I'm not positive, but you might need a 1/4" T3 spacer flange and longer manifold outlet bolts to move the turbo out from the manifold a little bit. Just depends on the compressor housing.

http://www.atpturbo.com/Mercha...e=FLS