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Mar 20, 2018 | 06:05 AM

Javier PR

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From: Puerto Rico

4g63

Hi! We run a Mitsubishi Eclipse V6 3.0L in road racing under SCCA STU rules. We are considering an engine swap to the turbo 2.0L 4G63 Evo engine. We would need to have a 35mm (1.4”) restrictor plate. Anyone know if that would make sense or how much would that plate impact performance?

Mar 20, 2018 | 08:58 AM

Dallas J

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From: Portland, Or

35mm restrictor as a pretty big effect on power up top. WannabeGTS (I think thats his name here, Zach at PRE) has an FP Evo with a restrictor and might be able to give more info on the limits. I recall SCCA use to run something like a 37mm but had to increase it because that was too aggressive.

Mar 20, 2018 | 10:16 AM

kikiturbo

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Joined: Mar 2008

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From: Croatia

Quote:

Originally Posted by Javier PR

try avoiding a simple plate but get a proper turbo inlet restrictor.. like https://www.raetech.com/Restrictors/Restrictor_GT.php

gr N cars used to run 32 mm which limits them to about 260 or so hp.. my guess is that with a good 35mm setup you are looking at 350 hp or so..