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Disco Patato On Rb20

quincy777

By quincy777,
in Engines & Forced Induction

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quincy777 Community Regular

quincy777

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Posted (edited)

I have just put one of these (GT28RS) on rb20 and results are different then expected. Has anyone else have one on there rb20. I don't wont 2530 results even though should be similar.

Without a specific tune, power feels good but seems to be laggier then expected with 1.1 bar by 4300rpm!? Any comparisions would be good.

BTW Mods include: Power FC, AVCR, FMIC, GTR injectors, Z32, Pump, full exhaust, cold air intake and heat shield.

Thanks

Edited by quincy777
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https://www.sau.com.au/forums/topic/90059-disco-patato-on-rb20/
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Dale FZ1 Veteran

Dale FZ1

Posted
Posted
I have just put one of these (GT28RS) on rb20 and results are different then expected.

I'd be interested to know how you got it fitted. Flange adaptor, and other fittings required? Much cost in that stuff?

cheers

quincy777 Community Regular

quincy777

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Had some great help at GT Auto in croydon putting the turbo on. Needs adapters, new dump pipe, and new water and oil lines. Actuator also needs some fabrication. Wayne at GT is the guy you want.

Anyone have even have an idea whether my results are on the right track??

BHDave Grand Master

BHDave

Posted
Posted

It seems pretty laggy for a 2530 equivalent. The discos rated around the mid 300 hp mark, my old highflow rated at 470-480 (stage 2 gcg) was coming on around the same point.

I think the step down at the adapter could be causing a few problems, maybe. I would have thought the turbo would be making decent boost at 3500 or so.

What is the response like? Is it coming on really slowly initially than shooting up to 1.1bar or is it building to say .6 quickly and then slowly rising to 1.1?

Dee 33 Community Regular

Dee 33

Posted
Posted

It could be the way your boost controller is set up.

When I picked my car up after a shitload of work and money it would only boost to about 9 psi then creep up to 14 as the revs approaches 6.5k.

I then found out that for some crazy reason my bleed valve was completely shut. Opened it up and all better :P

quincy777 Community Regular

quincy777

Posted
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Posted

Thats what I thought. Response is just what you discribe, comes on really slow then bang you have all of it, which is getting annoying for wheel spin, and overtaking where you get the delay before taking off. What is that caused by. I have checked the obvious - leaks and actuator preload.

BHDave Grand Master

BHDave

Posted
Posted

You seem to be getting big turbo/small engine type response but a disco isn't a big turbo.

Can you check the part number? Check it against the numbers listed on www.turbobygarrett.com .GT2860RS is the disco i think.

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