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Actually... he'll only be at 82% duty cycle with 4 x 1600cc at 9500 rpm. If he brings it up to 9500 rpm, he should be able to hit 730 hp.
My calculations at 10.5 AFR give 660 hp at 8000 rpm, so he's right on the money. I would say his bridgeport flows slightly more than my calculated flow which is for a large streetport. Here's the calculated dyno plot according to his set-up. Attachment 709766 Injector Pulsewidth rpm Primary (ms) Secondary (ms) 1000 7.70 0.00 1500 9.20 0.00 2000 10.84 0.00 2500 12.62 0.00 3000 14.56 0.00 3500 8.35 8.35 4000 9.27 9.27 4500 10.20 10.20 5000 11.16 11.16 5500 12.67 12.67 6000 12.27 12.27 6500 12.12 12.12 7000 11.86 11.86 7500 11.61 11.61 8000 11.35 11.35 8500 11.09 11.09 9000 10.83 10.83 9500 10.58 10.58 Duty Cycle (%) rpm Primary Secondary 1000 6.42 0.00 1500 11.50 0.00 2000 18.06 0.00 2500 26.29 0.00 3000 36.41 0.00 3500 24.35 24.35 4000 30.89 30.89 4500 38.24 38.24 5000 46.50 46.50 5500 58.05 58.05 6000 61.35 61.35 6500 65.67 65.67 7000 69.21 69.21 7500 72.54 72.54 8000 75.66 75.66 8500 78.56 78.56 9000 81.25 81.25 9500 83.72 83.72 |
Oh shit forgot he has E85. So he's actually at 90% at 9500 rpm. Oops.
rpm Pri (ms) Sec (ms) 1000 8.30 0.00 1500 9.92 0.00 2000 11.68 0.00 2500 13.60 0.00 3000 15.70 0.00 3500 9.00 9.00 4000 9.99 9.99 4500 11.00 11.00 5000 12.03 12.03 5500 13.66 13.66 6000 13.23 13.23 6500 13.07 13.07 7000 12.79 12.79 7500 12.52 12.52 8000 12.24 12.24 8500 11.96 11.96 9000 11.68 11.68 9500 11.40 11.40 Duty (%) rpm Pri Sec 1000 6.92 0.00 1500 12.40 0.00 2000 19.47 0.00 2500 28.34 0.00 3000 39.26 0.00 3500 26.26 26.26 4000 33.31 33.31 4500 41.24 41.24 5000 50.13 50.13 5500 62.60 62.60 6000 66.15 66.15 6500 70.80 70.80 7000 74.63 74.63 7500 78.22 78.22 8000 81.58 81.58 8500 84.71 84.71 9000 87.61 87.61 9500 90.27 90.27 |
^^^^^^ I calculated for E15 instead of E85. You guys are right. 4x1600 is impossible. He hits 80% duty cycle at 5000 rpm.
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here's a pic of some of the runs he sent me... you can see how lean it was :shocking:
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Wow...... That's the leanest AFR I've ever seen on a 600 hp car.
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Originally Posted by ChrisRX8PR
(Post 9145669)
Ok so correct me if I am wrong...
He is running 15 deg advance, and he is retarding 10Deg at 25psi? or at 15? or what? Doesn't this mean he is running at 5Deg advance actual timing and this is pretty conservative for a E85 rotary, right? I am running e 85 25 advance with a Tmap of -17 above 16psi which puts me at 8deg actual advance with a split of 8 going down to a split of 6 towards the upper rpm range but my engine is a renesis which is 10:1 compression. I am running an lt10s with ls2 coils and I boost up to 20-21psi due to the fact that my Microtech only goes up to 20psi. The turbo is a Precision turbo PT71GTQ...2 X -044 pumps with aeromotive regulator, 2X 720cc Primaries, 2X 1000cc Primary 2's and 2X1680cc Secondaries(renesis has 6 injectors total). Also if he is running 5 deg actual advance, 10deg of gap would put him at -5deg for the trailing, is this better?, worse? Am I pushing mine too much...Any thoughts.. Great numbers by the way :). Thanks for the help. Chris Anyone? Chris |
Originally Posted by series3
(Post 9160316)
here's a pic of some of the runs he sent me... you can see how lean it was :shocking:
I think he needs enrichen the mixture but we should be very careful calling foul his numbers. Barry |
thanks Jared. i apologise for missing the fact that ethanol has 34% BTUs than methanol.
howard coleman |
Originally Posted by enzo250
(Post 9092335)
Usually when a wastegate is too small you will have boost go up NOT down....
Boost drops when there's a restriction in the exhaust or your overspinning the turbo.. |
Originally Posted by IronMdnX
(Post 9090331)
This info might change things
Gas = 19000 BTU Methanal = 9500 BTU Ethanol =12500 BTU E85 =13475 BTU So our guy's 670rwhp is entirely possible if he's pushing his injectors to the max. with a little higher line pressure as well... which he was probably doing. His ''regular'' everyday tune would probably be at 22-23psi & 630rwhp to keep it within the injectors regular use safe limits... |
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