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Old 08-05-2015, 12:06 PM   #1
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Default >10 PSI on Rotrex track driven NB2s

Is anyone running more than 10 PSI on their Rotrex 2001 plus track car? If so any issues when doing track days with our 10:1 compression and detonation?
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Old 08-05-2015, 03:22 PM   #2
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Is anyone running more than 10 PSI on their Rotrex 2001 plus track car? If so any issues when doing track days with our 10:1 compression and detonation?
</p><p>&nbsp;</p><p>What are you planning on using for engine management. If its a fully programmable stand alone you can pull timing if you run into knock</p>
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Old 08-05-2015, 04:15 PM   #3
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I am doing that with a AEM FIC, but concerned going up to 12 PSI (with 75 mm pulley)might be a bit too much for track days since the NB2 engine is 10:1 compression

Last edited by tomiboy; 08-11-2015 at 09:12 AM.
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Old 10-01-2015, 02:02 PM   #4
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I am doing that with a AEM FIC, but concerned going up to 12 PSI (with 75 mm pulley)might be a bit too much for track days since the NB2 engine is 10:1 compression
I have an NB2 engine with the AEM FIC running 10psi, so granted, this is not an apples to apples conversation because of two less psi, but my cars has 5k+ track only miles and so far...so good.

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Old 10-01-2015, 02:15 PM   #5
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I am doing that with a AEM FIC, but concerned going up to 12 PSI (with 75 mm pulley)might be a bit too much for track days since the NB2 engine is 10:1 compression
NB2 engine will make just as much power as the earlier motors. You just might have to run less timing than them.

If you're concerned about the extra 2psi, pull some timing out.
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Old 10-01-2015, 02:52 PM   #6
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I have an NB2 engine with the AEM FIC running 10psi, so granted, this is not an apples to apples conversation because of two less psi, but my cars has 5k+ track only miles and so far...so good.
That's where I'm at now ....10 PSI. I also have many track miles without issues. Just don't want to have any if I raise the boost
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Old 10-01-2015, 03:10 PM   #7
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That's where I'm at now ....10 PSI. I also have many track miles without issues. Just don't want to have any if I raise the boost
Fair enough! Please keep the thread (me!) updated as I feel 10 PSI feels sufficient for now, however, I do not think a substantial amount of time has ever passed without me wondering if I could squeeze any more power reliably out of a setup.

How do you like the AEM FIC for as far as tuning? I still have a slight idle issue and have read that the Megasquirt may rectify this situation.
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Old 10-01-2015, 04:28 PM   #8
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Is anyone running more than 10 PSI on their Rotrex 2001 plus track car? If so any issues when doing track days with our 10:1 compression and detonation?
I ran 22 PSI on 10.5:1 with my whipple. With water injection. Now run 9:1 and more boost but no WI but more E85.

Easy button for your setup is more octane.
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Old 10-01-2015, 05:05 PM   #9
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I ran 22 PSI on 10.5:1 with my whipple. With water injection. Now run 9:1 and more boost but no WI but more E85.

Easy button for your setup is more octane.
I've been contemplating E85
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Old 10-01-2015, 05:14 PM   #10
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I've been contemplating E85
I daily my miata, and I have to drive about 20-25min to the closest E85 station. But other than that, totally worth it. If you track the car, it's a good idea. Will keep that motor from ever detonating and let you run more boost too. Win/win.
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Old 10-01-2015, 05:19 PM   #11
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I've been contemplating E85
Also I gotta say Vlad told me to do it for years, and I didn't listen. I should have. I'm planning to buy a few jugs to store E85 in so I can refuel the car at home to cut down on my number of trips to the E85 station.
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Old 10-01-2015, 05:56 PM   #12
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Not only do I have a number of E85 stations around my home, but the gas station we fill up at, next to the track I frequent, has it also

Last edited by tomiboy; 10-02-2015 at 08:57 AM.
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Old 10-01-2015, 06:03 PM   #13
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Unless things change by the time I want to increase the boost, at the moment there are zero public E85 fueling stations in Connecticut.
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Old 10-01-2015, 09:51 PM   #14
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Not only do I have a number of E85 stations around my home, but the gas station we fill up at next to the track I frequent has it also
Nice. Well there's your answer! Wish I was in your situation.
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Old 10-02-2015, 08:56 AM   #15
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Fair enough! Please keep the thread (me!) updated as I feel 10 PSI feels sufficient for now, however, I do not think a substantial amount of time has ever passed without me wondering if I could squeeze any more power reliably out of a setup.

How do you like the AEM FIC for as far as tuning? I still have a slight idle issue and have read that the Megasquirt may rectify this situation.
I didn't tune the FIC myself. I just did data logs and Ken Hill tuned it via emails. It runs like stock. I wanted to maintain the ability to pass our emission testing. You an pick them up used for $150. You also need a Boomslang harness
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Old 10-02-2015, 03:21 PM   #16
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Not only do I have a number of E85 stations around my home, but the gas station we fill up at, next to the track I frequent, has it also
You probably know this, but just to state the obvious, you can't just go and fill up with E85 and call it a day, you need to retune for it.
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Old 10-02-2015, 05:16 PM   #17
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and bigger injectors
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Old 10-02-2015, 05:18 PM   #18
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and bigger injectors
Oh yeah, hadn't looked at your signature. Definitely bigger injectors too. Cheers.
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