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Rb20det Boost Questions

ryano

By ryano,
in Engines & Forced Induction

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ryano Contributor

ryano

Posted
Posted

Gday all, just a couple quick questions. First I will give some info.

Ok my car is an r32gtst with stock rb20det stock manifold, HKS 2530, split dump and 3 inch exhaust with de-cat and 2 mufflers (streeter). It makes just over 300hp atw on 1.16bar.

First question is- What kind of exhaust temps should I be seing on my guage as I'm boosting and does it usually move up to this point fairly quick from when just cruising off boost? I think mine usually goes up to around 7-8x100deg

Second question is- Is it likely my car over boosts to around 1.5bar from 1.16 when on full load due to the standard manifold not flowing enough or exhaust being restrictive?(the mufflers are high flow RSR)

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https://www.sau.com.au/forums/topic/186149-rb20det-boost-questions/
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zebra Grand Master

zebra

Posted
Posted

Too much restriction will cause a lack of boost or boost tapering off at high revs as the turbine wheel cant get enough gas to flow through it at speed.

700-800 degrees Exh Temp sounds pretty normal.

Andrew

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