how much boost can a stock 12a handle
05-24-06, 01:30 PM
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how much boost can a stock 12a handle
I just bought a turbo kit for my 85 12a and i was just wondering how much boost can i run in that car safely and i was wondering if anybody had any tips on setting up a intercooler whille still running carb any input is apreciated
05-24-06, 02:57 PM
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I'm assuming it's blow through, since he's talking about running an intercooler. I run 10psi on my rebuilt and ported 12a. I hear that's a pretty good level. Some say 14psi is fine though, but I would suggest you have a rebuilt motor, maybe with some oil modifications, higher psi regulator, higher flow oil pump, and def go over to a air/oil oil cooler since your car came with the beehive oil cooler stock.
05-24-06, 07:07 PM
#5
The simplest answer, until they pop. Then you start over with a fresh motor and learn to tune from there. I've seen psi numbers as high as 28-32, by guys that have been doing boosted rotary for years, and know how to do it.
10-14 psi is generally a decent number, depending on turbo, intercooling and maybe even water/alcohol injection. These numbers should be worked up to, not used as a starting point. 6-8 psi to begin with, then work up from there with tuning.
10-14 psi is generally a decent number, depending on turbo, intercooling and maybe even water/alcohol injection. These numbers should be worked up to, not used as a starting point. 6-8 psi to begin with, then work up from there with tuning.
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05-25-06, 07:18 PM
#12
wouldnt more than 10psi on a carb be hard on it? i was also toying with the idea of instead of doing my t2 engine swap, just building my 12a and throwing a turbo on it. not tryin to thread hijack, but what all would need to be done? already have a mikuni carb, and plan on rebuilding and porting the 12a. gotta have a car hat and manifold and turbo of course... so what else?
05-26-06, 02:33 AM
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Originally Posted by 81gsl12a
21psi is the max a 12a can take...im not going it say it will take it for very long but it can handle 21psi...that is the max with a very good tune
05-26-06, 10:26 AM
#16
Originally Posted by REVHED
On what basis can you make a blanket statement like that? There are way too many variables... type of fuel, size of turbo, intercooler efficiency, quality of the tune, etc.
the question was "how much boost can a stock 12a handle" and i know of ppl that have run 21psi. zac(FBII) on his old set up had run 21psi a few times but it never blew when he was runing that much boost... but the motor will not last a long time
i know a rotary building in FL that told me the same thing. He didint say how long it would last but he did say it could handle it..than i had 1st hand of 21psi with zac's car hitting 21psi....
that is what i basis my statement on..
05-26-06, 03:53 PM
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ok
no it has a lot of miles but i picked up a turbo for 100 bucks and the entire kit is in good shape i just didnt know about the boost capacity of the 12a its got nothing done to it but what could i do to make this better
05-26-06, 05:00 PM
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Originally Posted by 81gsl12a
the question was "how much boost can a stock 12a handle" and i know of ppl that have run 21psi. zac(FBII) on his old set up had run 21psi a few times but it never blew when he was runing that much boost... but the motor will not last a long time
i know a rotary building in FL that told me the same thing. He didint say how long it would last but he did say it could handle it..than i had 1st hand of 21psi with zac's car hitting 21psi....
that is what i basis my statement on..
i know a rotary building in FL that told me the same thing. He didint say how long it would last but he did say it could handle it..than i had 1st hand of 21psi with zac's car hitting 21psi....
that is what i basis my statement on..
The point I'm making is, you can't say a certain engine will handle x ammount of boost pressure because it depends on the exact setup.
Last edited by REVHED; 05-26-06 at 05:02 PM.
