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what size wastegates to go w/my twin 70's? are 60mm too big?

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Old 06-09-2008, 10:02 PM
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Default what size wastegates to go w/my twin 70's? are 60mm too big?

Just as the title states:

I'm having trouble building boost at the line at the track. What's funny is, on the street, at the shop, or even in the parking lot at the track, it builds boost just fine w/in 5 seconds or so it's at full boost. But it seems as though after my burnout my waste gates are sticking open just a bit and my car will only build 2 or 3 lbs of boost. The car builds boost fine going down the track, but at the line it's not... What does this sound like to you guys? Thanks for your expertise! --Andy
Old 06-10-2008, 07:22 PM
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anyone?
Old 06-10-2008, 07:31 PM
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twin 60's, that is way overkill ??????

are these HKS,TIAL,JGS, Or Chinese 60's? If they are knockoff Chinese units the valve guides are prob bad.
Old 06-11-2008, 09:43 AM
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unfortunately they are chinese 60's...even if they are overkill(them being too big), will that cause my problem?
Old 06-11-2008, 11:25 AM
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wastegate size shouldn't matter unless they are leaking!!!
Old 06-11-2008, 11:56 AM
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Welcome to the world of cheap chinese gates. Probably leaking.....I swear they must use condoms for the diaphrams....lol.
Old 06-11-2008, 01:39 PM
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Best quote I ever heard "if you use race fuel the diaphragms will stick like bubble gum to carpet."
Old 06-11-2008, 04:07 PM
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Originally Posted by DrTurbo
Welcome to the world of cheap chinese gates. Probably leaking.....I swear they must use condoms for the diaphrams....lol.
so you don't think they're too big? what wg's should I go with?
Old 06-11-2008, 04:07 PM
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Originally Posted by Tiago
wastegate size shouldn't matter unless they are leaking!!!

what size are you running Tiago? Brand?
Old 06-11-2008, 04:10 PM
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We use 40mm units for our customers car with twins. Give us a shout if you need some.



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