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 Mazda RX-7s
 Turbocharged NA
 how much psi can a N/A handle
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4 Posts

Posted - Sep 06 2004 :  03:25:51 AM  Show Profile  Reply with Quote
and i also wanted to know what size injectors i need for the safc

Aaron Cake
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Canada
6718 Posts

Posted - Sep 07 2004 :  09:14:54 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
The amount of boost an engine can handle is not a set figure. It depends on many things. The type of turbo, the intercooler, fuel and ignition, condition of the engine, how it's ported, etc. are all a factor.

Generally speaking, the stock turbo is good to about 14 PSI, and starts loosing efficiency quickly at 12PSI.

As for injectors, what are you trying to do?

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n/a
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4 Posts

Posted - Sep 10 2004 :  09:54:04 AM  Show Profile  Reply with Quote
quote:

The amount of boost an engine can handle is not a set figure. It depends on many things. The type of turbo, the intercooler, fuel and ignition, condition of the engine, how it's ported, etc. are all a factor.

Generally speaking, the stock turbo is good to about 14 PSI, and starts loosing efficiency quickly at 12PSI.

As for injectors, what are you trying to do?





ive got a 87 N/A GXL stock motor;that i want to turbo;i bought a cheapo ssautochrome turbo mani that im going to modify;modify meaning extra support and extend it to clear the LIM;i can install it ; i just dont know about fuel management on these;i would like to do 10psi on a safc tuned;oh its a t4 mani;what would be the best size turbo for my application

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Aaron Cake
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Canada
6718 Posts

Posted - Sep 13 2004 :  09:09:06 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
Don't take this the wrong way. I'm just going to tell you what I tell everyone else in this situation.

If you have to ask, you can't do it.

That said, start off with the stock turbo and a set of 550CC injectors. Better if you are running 680 or 720CC secondaries. The S-AFC should manage this easily.

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4 Posts

Posted - Sep 13 2004 :  3:19:11 PM  Show Profile  Reply with Quote
quote:

Don't take this the wrong way. I'm just going to tell you what I tell everyone else in this situation.

If you have to ask, you can't do it.

That said, start off with the stock turbo and a set of 550CC injectors. Better if you are running 680 or 720CC secondaries. The S-AFC should manage this easily.





i only needed to know a few details;i have turbod a N/A car before

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Aaron Cake
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Canada
6718 Posts

Posted - Sep 14 2004 :  08:52:58 AM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
quote:

i only needed to know a few details;i have turbod a N/A car before



I find this hard to believe. All the questions you asked were elementary to any turbo project.

Not trying to be an ass, but I'm sort of tired of people assuming this project will be a quick and easy first project.

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n/a
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4 Posts

Posted - Sep 14 2004 :  6:44:03 PM  Show Profile  Reply with Quote
i'll post pics when im done;and the reason for the after market manifold and turbo; is so i dont have notch the frame;it has a external wastegate

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