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Building RB20DET for boost

JankityJenkins
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JankityJenkins Rookie

JankityJenkins

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Posted

Howdy y'all looking for some insight on doing a some what of a mild build on the ole rb20. Yeah yeah I know why dont you just go rb25, cuz I dont want to conform to what everyone else does.

 

Anyways I have 270 8.8mm cams coming from otaku garage for the head. I want to build head, valve springs, lifters, valves, and of course porting as I am going to be running bigger turbo. Preferably a gt3071r.

 

I am not wanting to do anything to my 40k mile bottom end besides bearings, unless any of you recommend anything.

 

Any insight and ideas from your knowledge would be greatly appreciated from you wild dream boats from down under that do some crazy shit with RBs

 

Best regards @JankityJenkins from the states

#mulletlife #rbprty

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KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

Hi you crazy wild rebel you. There are some highly strung RB20s around. For your 40 psi screamer you will want a custom exhaust manifold and a huge exhaust to suit. And as I always say its all in the tune so get a Link  Ecu  or such like and find a really good tuner!

GTSBoy Grand Master

GTSBoy

Posted
Posted

Not rebuilding the bottom end on a REALLY OLD engine is not always the right move when you're talking about headwork and big cams. There's no point in talking about porting and big cams unless planning on lots of boost and big revs. Massive boost + cast pistons not always good bedfellows.

270° cams on an RB20 = lag for days, boost from 4500 up to 9000+. I'd be thinking about new rods and/or rod prep, ARP rod bolts, forged pistons. At the least. Probably worth considering the oil pump situation too.

Otherwise, it is fairly common to see RB20s run about 260-270rwkW without much preparation and run for a few years before popping.

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Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

It's 2019 and people still talk about GT3071? 

Put a GTX3071R Gen 2, twin scroll it's mum, twin gates, proper SINCO manifold.

PRP block brace, PRP coil kit, 100mm Plazmaman Cooler, Plazmaman Plenum, Motec M150, Samsonas, and MCA Golds

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