Average rwhp per psi on E85?
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From: Arnaudville, LA
Average rwhp per psi on E85? What would you all say the average rwhp per psi of boost on E85 and safe tune? I realize many variables come into play..... Just asking what you all think it would be from what you have seen for a street car. Give a range from low to hight if you would like. I am referring to as a example 20 rwhp per 1 psi or 25 rwhp per 1 psi ect......
Thanks
Brian
Thanks
Brian
very hard to call, if you are on the efficiency island of the compressor, then you will have huge gains compared to being on the surge line or the choke line. 20rwhp is a good approximation per psi. Keep in mind however that timing is more indicative of the power that will be realized.
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In order to be useful, any answers to this question should specify which turbo or supercharger the results came from.
To give you an idea of how much difference that can make: In my Subaru, 17psi with the stock turbo was good for about 260whp (stock power is about 215whp, so that's a gain of 2.6whp per psi), whereas the GT3076 that's in it now makes 22psi and 375whp (gain of 7.3whp per psi). Bigger turbos make around 450 with boost in the teens, so 12ish whp/psi. The same sort of thing will apply with an LS, except the whp numbers will be more-than-doubled because the displacement is more-than-doubled.
So, PSI numbers tend to be more misleading than useful. Be careful with them.
To give you an idea of how much difference that can make: In my Subaru, 17psi with the stock turbo was good for about 260whp (stock power is about 215whp, so that's a gain of 2.6whp per psi), whereas the GT3076 that's in it now makes 22psi and 375whp (gain of 7.3whp per psi). Bigger turbos make around 450 with boost in the teens, so 12ish whp/psi. The same sort of thing will apply with an LS, except the whp numbers will be more-than-doubled because the displacement is more-than-doubled.
So, PSI numbers tend to be more misleading than useful. Be careful with them.
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11 Second Club
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From: Arnaudville, LA
Subeone........Hopefully i will be on that magical efficiency island LOL..... I plan to just push this motor to 14 psi and chill while I put the next motor together.
