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Manifold Shortening For Bigger Turbo ?

CALEBSNZ

By CALEBSNZ,
in Engines & Forced Induction

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CALEBSNZ Newbie

CALEBSNZ

Posted
Posted

So i got a new rb20det and its running standard 20det sidemount turbo , i want to put my t3t4 back on but its ennificient on a 20 kicking in around 4000-7000k i heard if manifold is shortened it will kick in quicker and be more effecient , is this true and is it worth it ?

CALEBSNZ Newbie

CALEBSNZ

Posted
  • Author
Posted

idk i was just told this by a mate and i wasnt really paying to much attention but i would assume turbo manifold , i just want more boost out of it and i already have the turbo so it would be good if i could run that but have it kick in lower revs

CALEBSNZ Newbie

CALEBSNZ

Posted
  • Author
Posted

yea stock manifold sidemount , thats what i was thinking but he said hes done it before and its a piece of piss so idk haha but it doesnt sound like something you would do i guess i would have to look into it more but i agree hacking into manifold doesnt sound logical haha

Ben C34 Grand Master

Ben C34

Posted
Posted

you can disconnect the actuator

Yep, easiest and cheapest way to unlock max boost, pull off wastegate line. (seeing as you got fairly confused about the manifold thing, that is a joke)

niZmO_Man Grand Master

niZmO_Man

Posted
Posted

Tell whatever hybrid turbo you have. Buy a NEO6 turbo, it bolts straight on. Put the RB20 actuator on that and enjoy 10psi. It kicks in around 3,000rpm (probably a bit earlier if you had a full exhaust). Good for some fast driving, better fuel economy while putting around. Win win.

Dan_J Veteran

Dan_J

Posted
Posted

this applies to manifold pipe diameter, bigger pipe = more lag but some top end power, where as smaller pipe is more response but top end power is reduced

so stock manifold is more responsive due to smaller diameter pipe

you might have a boost leak or if not your running a r33 turbo/actuator for that 6psi

r32gtrs Rookie

r32gtrs

Posted
Posted

sounds like its normal for an ebay t3/t4 turbo (whatever that is who really knows) to spool extremely late on a 20. you cannot shorten the maniifold someones just talking crap to you. better off selling it and putting on an rb25 standard turbo. car will be like new car to drive, will be so much quicker and more enjoyable.

eightsixboy Mentor

eightsixboy

Posted
Posted

Op6 rear housing is a little big for a 20, considering you can't run a lot of boost through them I wouldn't bother, better of selling one he has and buying a 2530 or similar, at least will have the potential to make decent power and have great spool.

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