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Rb25det Turbo Upgrade

gun_33

By gun_33,
in South Australia

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D_Stirls Veteran

D_Stirls

Posted
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It would be depending on the power that you were chasing.

A GT3071R will support 270>300kw (with a big rear housing) but will be laggier than a gt2871R as it has a 60mm turbine wheel rather that the 53.8mm turbine wheel found in the 2871R. Also the GT3071R runs a 56 trim compressor which will also be slightly laggier than the 52 trim which is the most common trim used on the GT2871R although the 56 trim is available with the GT2871R's.

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gun_33 Explorer

gun_33

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whilst i have everybody's attention :P:D:D:D i am just about to purchase some poncams of the for sale section. they are in engine is there anyway i can tell that they are in fact poncams before purchase?

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SLED Grand Master

SLED

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not sure if they have any markings that determine whether or not they are "B"'s etc without measuring lobes with a dial gauge................speaking of lobes, if the cams are still in the motor, I wouldn't be touching them before checking lobes & journals regardless of mileage.

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D_Stirls Veteran

D_Stirls

Posted
Posted (edited)
So where do I start shopping for a NS111 compressor wheel and housing? :P

The NS111 wheel is the T28 9 blade turbine wheel. I thnk that you will find it's cheaper to buy a complete CHRA than to buy just the compressor wheel, get the housing machined to fit and then get the assembly balanced. Infact it might be the cheapest to get a complete GT2871R swap the T2 turbine housing over with the T3 housing on your 2530 then sell the 2530 as a complete turbo, going this route you will probably on be paying a few hundred once the 2530's sold, and you can swap the housings yourself.

As for the cam they should have the lift and duration stamped on the back end of the cam and the shaft itself will have Tomei cast into it.

EDIT!! Looks like i could be wrong about Tomei being cast into the cam as i have just look at some pictures and it looks like they don't. I know my HKS do but Tomei mustn't.

IMG_0768.jpg

IMG_0766.jpg

Edited by D_Stirls
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Tangles Grand Master

Tangles

Posted
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rm rb26 greddy 'ss' street-special cams are marked "grex ss"

if I recall correctly my rb25 tomei poncams were marked; were NIB so had no worries.

sounds nice on idle :)

rueben - sell the hks 2530 and purchase a new turbo, more economical that way & better value for money IMHO

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RubyRS4 Grand Master

RubyRS4

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reuben - sell the hks 2530 and purchase a new turbo, more economical that way & better value for money IMHO

:) By the time the 2530 sells, I'd be able to afford an R35 :(

Figured I'd just have a much better chance of building the turbo I want, rather than rely on selling, then finding the right turbo. Plus I don't have to deal with tyre-kickers.

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RubyRS4 Grand Master

RubyRS4

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How long would it take to deliver a 3076? I'll need to sell the 2530 first. So I'll be without a car for the duration of "sell-buy".

And its my daily.

:)

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D_Stirls Veteran

D_Stirls

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The T3 housing i the thing that's not easy to come by. I'm pretty sure that Ryans GT2871R was actually a GT-RS, which is the same turbo except that HKS offer a T3 turbine housing where as Garrett don't. That is why i'm suggesting buying the complete turbo and swapping just the rear housings.ATP offer aftermarket T3 housings for the T28 based turbos though.

I GT3071R will be $11963 posted from the states (i think it's canada actually). That's a 0.82 A/R with the 2.75 inlet 2 inch out compressor housing (which looks closer to the factory turbo than the 4 inch inlet version.

I just had a look and ATP will do you a 2871R CHRA and compressor housing for $1204 posted.

A complete GT2871R will be round the $1600 mark posted, but then you can sell the GT2530 complete.

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RubyRS4 Grand Master

RubyRS4

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well i am getting mine from the US so yeah expect at least a couple of weeks

This is not an option.

The T3 housing i the thing that's not easy to come by. I'm pretty sure that Ryans GT2871R was actually a GT-RS, which is the same turbo except that HKS offer a T3 turbine housing where as Garrett don't. That is why i'm suggesting buying the complete turbo and swapping just the rear housings.ATP offer aftermarket T3 housings for the T28 based turbos though.

I GT3071R will be $11963 posted from the states (i think it's canada actually). That's a 0.82 A/R with the 2.75 inlet 2 inch out compressor housing (which looks closer to the factory turbo than the 4 inch inlet version.

Is this a typo? :)

I just had a look and ATP will do you a 2871R CHRA and compressor housing for $1204 posted.

A complete GT2871R will be round the $1600 mark posted, but then you can sell the GT2530 complete.

Might look into this option.

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