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Laggy R32 Gtst

Acidik

By Acidik,
in Engines & Forced Induction

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Acidik Collaborator

Acidik

Posted
Posted

This is something that has been bugging me for ages and I have finally had enough!

I have a 32 with a (from what I can gather) a T04e 'AIReasearch' turbo 'upgrade' and all the supporting mods (gtr pump, fuel pressure regulator, 3in exhaust off the turb0, 3.5 off the cat, and 3in intercooler piping!???).

My dilema is the car is incredibly laggy, I am talking full boost 5k. Now is this the turbo or the 3inch intercooler piping (I would have thought once the piping is filled with air it would make little difference).

I know these turbos are old and well not the best so could this be the problem? The car pulls hard all the way to rev limiter producing and really kicks you in the pants from about 5k.

If this is the problem, what is the best turbo that is reponsive down low and still pulls qute hard through the range.

Thanks in advance.

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Moodles2 Grand Master

Moodles2

Posted
Posted

AirResearch is what Garrett was called back then, sounds like a old-school bush bearing turbo, all bush bearing turbos are incredibly laggy.. a nice new Garrett GT ballbearing turbo should make a world of difference, as for which one to choose, read the RB20/RB25 dyno thread. this thread will most likely get locked.. next time search.

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STATUS Grand Master

STATUS

Posted
Posted
AirResearch is what Garrett was called back then, sounds like a old-school bush bearing turbo, all bush bearing turbos are incredibly laggy.. a nice new Garrett GT ballbearing turbo should make a world of difference, as for which one to choose, read the RB20/RB25 dyno thread. this thread will most likely get locked.. next time search.

rubbish the core is irrelevant, the trims and housing are the important part. The turbo in the op post is old tech trim and housing wise... slapping in a bb core wont help it 1 iota, so like i said the core is irrelevant.

Plenty of bush bearing turbo's offer awesome response.

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Yts Rising Star

Yts

Posted
Posted
That's right. I've got a garrett gt2876 on my rb20 and i don't see full boost until about 4500rpm and before that it's just a pig. Looks like it's time for a downsize in turbo or upsize in engine.

tdo6 20g on mine, full boost by 3200rpm doesnt compromise down low that much either best turbo choice i have seen on an rb20 and i have over 270kw atw so power is good also

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femno Grand Master

femno

Posted
Posted
..., all bush bearing turbos are incredibly laggy..

Bahah the stupidest thing ive read in a long time. Complete lies.

You obviously dont know what a Trust turbo can do.

The turbo you want is a HKS 2530. Best turbo evarrrrr for the RB20. Close to std response (use cam gears to aid response) and can make 220-230kw with fairly reasonable boost.

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Roy Grand Master

Roy

Posted
Posted (edited)
tdo6 20g on mine, full boost by 3200rpm doesnt compromise down low that much either best turbo choice i have seen on an rb20 and i have over 270kw atw so power is good also

Either you have a TD06 on an RB25DE and you dont realise you dont have an RB20...or its a type and you meant 4200rpm...or something else is going on. I know of a few TD06 setups getting around now and there is no way on earth most people are making 16-20psi at 3,400rpm and still making 270rwkws.

Interesting for Femno and Russman to drive my car with a TD06-20G when i get back on October. The 2530 is a good thing, but i am still tempted to say the slightly laggier TD06-20G is worth living with for the wider power band and 30rwkws odd more power it can give you. I am making about 19psi at 4,400rpm or something. But really, it doesnt get its boogie on until about 4,600rpm, irrespective what the boost guage says

Bu agree with URAS, combination of wheel sizes and housings mean its probably a turbo better off an RB25, not a lower compression, shorter stroke smaller cc RB20

Edited by Roy
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