2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Turbo lag opinions

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Old Jul 31, 2011 | 11:47 PM
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Turbo lag opinions

I have a full cut bridgeport s5 turbo block. There is an Air Research(Garrett) turbo really cheap on our version of Ebay(Its called Trademe) trouble is the exhaust side is 1.32 a/r and its divided. Is this gonna be incredibly lag-tastic? I dont want to run high boost either, maybe 10-12psi. Am i gonna be stuck waiting and waiting and waiting and when it hits is it gonna come on slow and fade away or come on strong and stay strong til the end?

Last edited by ben.farnath; Jul 31, 2011 at 11:57 PM.
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Old Jul 31, 2011 | 11:58 PM
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How much power do you plan to make? that's quite large...if your goal is under 400hp it may be a bit laggy down low.
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Old Aug 1, 2011 | 12:13 AM
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i would be happy anywhere between 350-450. but 450 would be fairly extreme.
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Old Aug 1, 2011 | 10:22 AM
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That's a recipe for lag. Any more info on the turbo? Like wheel sizes?

At the very least go down to the 1.15 housing on a full bridge.
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Old Aug 1, 2011 | 12:51 PM
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well a full bridgeport shifts the powerband into the higher rpm ranges anyway
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Old Aug 1, 2011 | 07:12 PM
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jus drive faster than lag won't be a issue
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Old Aug 1, 2011 | 10:43 PM
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Originally Posted by AmviciousRav
jus drive faster than lag won't be a issue
hahaha nice

50mm wheel induction side with a .60 a/r housing and 65mm exhaust wheel and the 1.32 a/r exhaust housing divided entry. the wheel sizes are from the sellers eyechrometer. its an air research TO4
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Old Aug 2, 2011 | 12:26 PM
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It sounds like it could be a T04b from a diesel. A 50mm inducer is pretty small; if you could confirm a 70mm compressor exducer size, that would make it a step above a T04b S-trim. So it would flow somewhere under 40 lbs/min around 1 bar. If we use Howard Coleman's HP estimate for that airflow, you get about 300 whp: https://www.rx7club.com/3rd-generation-specific-1993-2002-16/feeding-turbo-rotary-horsepower-airflow-fuels-881992/.
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Old Aug 2, 2011 | 11:04 PM
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oh yea so its rubbish then. cool wont buy it. cheers guys.
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Old Aug 9, 2011 | 02:28 AM
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I just bought this instead. Lag-tastic or not im excited. Its got a 22cm squared exhaust housing. I think its an h1e. Anyone running one and have opinions?


By benfarnath at 2011-08-09

By benfarnIath at 2011-08-09
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Old Aug 16, 2011 | 03:01 AM
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wooooo it arrived yesterday! now i need to make a manifold.

By benfarnath at 2011-08-15
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Old Aug 16, 2011 | 03:43 AM
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thats rather large, probably will have some lag but when it boosts its gonna be like a major kick in the ***** - but in a good way.
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Old Aug 16, 2011 | 03:44 AM
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haha yea thats what everyone says (not in such words but to that effect) lookin forward to it
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Old Aug 16, 2011 | 08:03 AM
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HUGE!@!@!@!@!@!@! lol XD
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