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Author Topic: Aaz safe boost  (Read 733 times)

October 18, 2018, 07:15:34 pm

RunninWild

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Aaz safe boost
« on: October 18, 2018, 07:15:34 pm »
How much boost can stock internals handle? I just took my taco with a freshly rebuilt aaz with arp head and main studs and its making 34psi with my holset he221w. The thing flies but I think this might be a bit much for it? I'm upgrading to an alh in the near future but I need to sell this without a hole in the block 😂



Reply #1December 15, 2018, 09:53:24 am

smutts

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Re: Aaz safe boost
« Reply #1 on: December 15, 2018, 09:53:24 am »
With stock boost about 10 psi max, you must be pretty close! ;)

Close to "Bang!" that is.

I'm the wrong one to ask, as I find walking much slower than a slow, but working, car. ;D
« Last Edit: December 15, 2018, 09:57:11 am by smutts »

Reply #2March 04, 2019, 08:55:35 pm

chrisg

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Re: Aaz safe boost
« Reply #2 on: March 04, 2019, 08:55:35 pm »
My old AAZ lasted 6 months at 40psi with a t3. But it had stock studs. It suffered the common cyl#3 main rod cap failure. Iíve seen it happen to quite a few. The early 1.9s had weaker mains (so Iím told) and with a lot of boost it tends to crack them and shoot them through the block

Reply #3March 07, 2019, 05:08:14 pm

Spokerider

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Re: Aaz safe boost
« Reply #3 on: March 07, 2019, 05:08:14 pm »
My old AAZ lasted 6 months at 40psi with a t3. But it had stock studs. It suffered the common cyl#3 main rod cap failure. Iíve seen it happen to quite a few. The early 1.9s had weaker mains (so Iím told) and with a lot of boost it tends to crack them and shoot them through the block

 I have acquired an aaz that had exactly this happen to it.
 Big hole in the block.
 What is the likely-hood that the cylinder head will still be ok after this catastrophic failure? I've not disassembled the engine to look yet.

Reply #4March 08, 2019, 08:04:38 am

RabbitJockey

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Re: Aaz safe boost
« Reply #4 on: March 08, 2019, 08:04:38 am »
max boost really depends more on the turbo and how much fuel is going with it.

40 psi from a stock t3 is going to be a lot harder on an aaz than an he221
98 Pontiac Grand Prix GT:stock daily
 81 Jetta: in progress 1.6td, ported head, holset turbo.
81 Rabbit:AAZ, hybrid T3 turbo, Giles pump, lightened fw, and yellow clutchnet clutch.

 

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