400rwtq @ 4100rpms
#1
400rwtq @ 4100rpms
I see a lot of people complaining about not making low end torque/power and figured I would share. This was for fun, and we didn't get to complete the run as it was out of fuel injector( 98% IDC). This is a 2 rotor on stock ports running E85 with out TDX61 turbo system, v mount, Adaptronic E440D Select, aem coils, 3.5" exhaust, ID1000/2000s etc. All one needs to do is run a medium frame turbo @ high boost. The run was finished @ 481rwhp/396rwhp @ 22psi, and fuel pressure was later raised to 5 bar. It also survived the weekend of roadcourse racing.
#4
Racing Rotary Since 1983
iTrader: (6)
of course the 30 psi of boost is the key to the big power number at 4100... and alcohol is the key to higher boost, in this case E85/ethanol.
just for fun i did my fuel/power calculation...
E85
two 1000 primary
two 2000 secondary
Gross injector cap 6000 CC/Min
Net Injector Delivery
minus 8% as duty cycle was 92%
minus 13% lag
5116 CC Minute Net Injector Delivery
5116 is 1.351 gallons per minute
1.351 GPM is 8.578 pounds per minute
adjust to E85 BTUs
8.578 X .708 = 6.081 pounds per minute
6.081 X 10.5 AFR = 63.85 pounds per minute air
63.85 X 14.471 = 924 CFM
924 CFM/ 1.92 = 481 rotary rwhp (SAE)
the dyno was done at STD correction so the SAE hp was
481 X .97995 = 471 SAE.
given that there are always many variables final numbers are of course only approximate.
running 30 psi w a rotary is always an eye opener.
i may have recounted this before on the board but it is worth repeating:
this last winter Luke Stubbs was dynoing a Genesis coupe (turbo 4 cyl, 2L) w a GT3076. the best he could do on pump before running into detonation was 420 rw. he drained the tank, filled it w half pump and half E60 (winter blend in Green Bay) and made 570! all due to being able to run higher boost which is just what Elliott did.
yet another success for alcohol, it isn't just for breakfast anymore.
howard
just for fun i did my fuel/power calculation...
E85
two 1000 primary
two 2000 secondary
Gross injector cap 6000 CC/Min
Net Injector Delivery
minus 8% as duty cycle was 92%
minus 13% lag
5116 CC Minute Net Injector Delivery
5116 is 1.351 gallons per minute
1.351 GPM is 8.578 pounds per minute
adjust to E85 BTUs
8.578 X .708 = 6.081 pounds per minute
6.081 X 10.5 AFR = 63.85 pounds per minute air
63.85 X 14.471 = 924 CFM
924 CFM/ 1.92 = 481 rotary rwhp (SAE)
the dyno was done at STD correction so the SAE hp was
481 X .97995 = 471 SAE.
given that there are always many variables final numbers are of course only approximate.
running 30 psi w a rotary is always an eye opener.
i may have recounted this before on the board but it is worth repeating:
this last winter Luke Stubbs was dynoing a Genesis coupe (turbo 4 cyl, 2L) w a GT3076. the best he could do on pump before running into detonation was 420 rw. he drained the tank, filled it w half pump and half E60 (winter blend in Green Bay) and made 570! all due to being able to run higher boost which is just what Elliott did.
yet another success for alcohol, it isn't just for breakfast anymore.
howard
#5
This is the first car I've ever dyno tuned on E85, and it is definitely very impressive. Not only is it extremely hard to detonate, but the engine coolant temps stay SO LOW. This stuff is a must for any track car in my opinion. We ran 27 psi at the track, and the water temps never went over 190 degrees F. I would have to look at the datalog, but I know for a fact on the the dyno it was never over 174F @ 22psi.
Here is the final dyno pull @ 22psi.
We intend to go back for some more dyno tuning later, and eventually see how much power the turbo will make @ 30+psi.
Here is the final dyno pull @ 22psi.
We intend to go back for some more dyno tuning later, and eventually see how much power the turbo will make @ 30+psi.
#7
FD Project
iTrader: (58)
Now that I'm running E85 my water temps never go above 176f here in South Florida, I'm running same 1000/2000 injector combo and @25psi my afr deeps to 10.2 afr. Running dual Aeromotive 340 base with base fuel pressure at 60psi.
Below 19 psi afr are around 11.5, I Need to pull fuel above 19 psi and raise boost another 3 psi to reach 28psi to compare with my 28 psi fuel map.
Below 19 psi afr are around 11.5, I Need to pull fuel above 19 psi and raise boost another 3 psi to reach 28psi to compare with my 28 psi fuel map.
Trending Topics
#8
Now that I'm running E85 my water temps never go above 176f here in South Florida, I'm running same 1000/2000 injector combo and @25psi my afr deeps to 10.2 afr. Running dual Aeromotive 340 base with base fuel pressure at 60psi.
Below 19 psi afr are around 11.5, I Need to pull fuel above 19 psi and raise boost another 3 psi to reach 28psi to compare with my 28 psi fuel map.
Below 19 psi afr are around 11.5, I Need to pull fuel above 19 psi and raise boost another 3 psi to reach 28psi to compare with my 28 psi fuel map.
Do you have a dyno plot of your final run? I haven't personally dyno tuned one at the 25+ psi range, and I would really like to see the torque curve..
#11
Corn Fed FD
iTrader: (1)
I'll share my old dyno and log on e85 with microwreck lt10s, x4, bosch coils,
rb template street port intake, stock port exhaust, gt4094r with .85ar hotside,
twin walbro pumps, 4x bosch 1600cc secondary, and id1000 primary,
this was on hot texas august 105+* weather on engine that had
couple years of couple hundred drag and dyno passes, close to 40k miles
on that build
rb template street port intake, stock port exhaust, gt4094r with .85ar hotside,
twin walbro pumps, 4x bosch 1600cc secondary, and id1000 primary,
this was on hot texas august 105+* weather on engine that had
couple years of couple hundred drag and dyno passes, close to 40k miles
on that build
#13
The king of the highway!
iTrader: (2)
Join Date: May 2004
Location: Home of the 305 Boyz(miami)
Posts: 2,988
Likes: 0
Received 0 Likes
on
0 Posts
Now that I'm running E85 my water temps never go above 176f here in South Florida, I'm running same 1000/2000 injector combo and @25psi my afr deeps to 10.2 afr. Running dual Aeromotive 340 base with base fuel pressure at 60psi.
Below 19 psi afr are around 11.5, I Need to pull fuel above 19 psi and raise boost another 3 psi to reach 28psi to compare with my 28 psi fuel map.
Below 19 psi afr are around 11.5, I Need to pull fuel above 19 psi and raise boost another 3 psi to reach 28psi to compare with my 28 psi fuel map.
#15
It wasn't that was the first thing I checked. I can't remember which screen it is in the dynojet software, but its very obvious. The car also made nearly 300rwtq at the same rpm during the 22psi run.. Its completely believable to gain 100 more rwtq from 8 more psi.
#17
Full Member
^^^^^ Has always been my strategy on piston engines. (Evo)
Plan top do the same with my 13B. Can run gear dependent boost tables with the MoTeC so will be hittkng it hard down low in the low gears and tapering towards redline, moreso in the higher gears.
Hope to get a somewhat similar curve out of the 13B.
Plan top do the same with my 13B. Can run gear dependent boost tables with the MoTeC so will be hittkng it hard down low in the low gears and tapering towards redline, moreso in the higher gears.
Hope to get a somewhat similar curve out of the 13B.
#21
Actually...
FUELS DATA
......................................AFR......... .FAR..........ER........Lambda
E85 stoichiometric..........9.765.......0.10235...1... ......1
E85 max power rich........6.975.......0.1434.....1.40.....0.7143
E85 max power lean......8.4687.....0.118.......1.153....0.8673
Last edited by Bwarrrrrp; 06-27-13 at 09:49 AM.
#22
Full Member
iTrader: (1)
A quick note on this, stoichiometric for e85 is much lower than any ulp petrol at approximately 10:1 AFR (I haven't bothered to interpolate from ethanol but it would be close to this figure). Therefore running above this is effectively throwing potential power away - max power would be less than this.
Actually...
FUELS DATA
......................................AFR......... .FAR..........ER........Lambda
E85 stoichiometric..........9.765.......0.10235...1... ......1
E85 max power rich........6.975.......0.1434.....1.40.....0.7143
E85 max power lean......8.4687.....0.118.......1.153....0.8673
Actually...
FUELS DATA
......................................AFR......... .FAR..........ER........Lambda
E85 stoichiometric..........9.765.......0.10235...1... ......1
E85 max power rich........6.975.......0.1434.....1.40.....0.7143
E85 max power lean......8.4687.....0.118.......1.153....0.8673
I mentioned 12.0:1 (gasoline/petrol based AFR ratio) due to that's the AFR measurement ratio that was used for tuning this engine. The info you posted is absolutely correct, however without including the corresponding information in gasoline based AFR's it's it's going to cause confusion for the majority of those reading this thread (those that don't fully understand the difference in lambda vs displayed AFR). This table will help further illustrate the difference in displayed AFR vs Lambda for different fuels included gas/petrol and E85.
#23
It's an interesting concept, because the repercussions of running lean means significant torque is lost. The idea of reducing boost to gain power might seem foreign but nonetheless that would be the effect. I don't expect ethanol to have exactly the same consumption loop as petrol but it would be fairly close.