15 PSI and 91 octane?
06-18-2015, 06:22 AM
#21
Originally Posted by profit_child' timestamp='1434595073' post='23651969
Just curious how much 93 octane would help in this matter compared to 91?
03-21-2017, 07:44 AM
#22
I'm turbo charged and I have be running 14-15 psi on the stock motor on straight 91 octane for many many years with over 40,000 turbo charged miles. My stock f20c now has 120,000 miles and makes 450whp at 14-15 psi on straight 91 octane and 617whp on e85 at 20psi. All tuned on a flexfuel setup on aem series 2. But in general I run straigh 91 octane 90% of the time.
A supercharger should be much easier to do this because if your running 15psi you really only have that for a split second at redline instead of someone that is turbines like myself. I hit 15psi at 5,000rpm and it hold 15psi till redline at 9,000rpm
Here is my boost plot. Low line is 14-15 psi on 91 octane. Higher line is e85.
A supercharger should be much easier to do this because if your running 15psi you really only have that for a split second at redline instead of someone that is turbines like myself. I hit 15psi at 5,000rpm and it hold 15psi till redline at 9,000rpm
Here is my boost plot. Low line is 14-15 psi on 91 octane. Higher line is e85.
03-21-2017, 07:53 AM
#23
If your tuner isn't comfortable doing it, then A. don't do it, or B get a tuner that is. But you need a confident/experienced tuner for the set up. Yours isn't apparently so I wouldn't trust him, if he doesn't trust himself with your equipment. The equipment should do it, unless its not working efficiently.
Last edited by s2000Junky; 03-21-2017 at 07:55 AM.
03-21-2017, 10:12 AM
#24
<img src="http://i28.photobucket.com/albums/c236/riceball777/car/s2000/FA431D1D-62A7-4507-A11C-C5761E27BE1B_zpst7hnh230.jpg" border="0" alt=" photo FA431D1D-62A7-4507-A11C-C5761E27BE1B_zpst7hnh230.jpg"/>
Last edited by riceball777; 03-24-2017 at 12:35 AM.
04-03-2017, 04:13 PM
#25
yes I still have my turbo s2000. But I have since then switched from the gtx3576r to a smaller gtx3076r Ptuning setup in vavor of better spool and better low end power. My stock f20c now has 130,000 mikes and makes 425whp on 91 octane at 13psi and 588whp on e85 at 20-21 psi. But on cold 40-50 degree weather on 91 octane it does hit 14-15psi. You can definitely push more boost on 91 octane with a bigger turbo safely.
<img src="http://i28.photobucket.com/albums/c236/riceball777/car/s2000/FA431D1D-62A7-4507-A11C-C5761E27BE1B_zpst7hnh230.jpg" border="0" alt=" photo FA431D1D-62A7-4507-A11C-C5761E27BE1B_zpst7hnh230.jpg"/>
<img src="http://i28.photobucket.com/albums/c236/riceball777/car/s2000/FA431D1D-62A7-4507-A11C-C5761E27BE1B_zpst7hnh230.jpg" border="0" alt=" photo FA431D1D-62A7-4507-A11C-C5761E27BE1B_zpst7hnh230.jpg"/>
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