What mods would you like to do for your Fit?
#21
02-17-2012 | 01:10 PM
Ethanol stoich AFR is much richer than Gas.
Gas stoich is 14.7:1, under boost on a high comp motor you may run as rich as 10.5:1AFR.
E98 scale AFR stoich is 9:1, and under boost you may have to run as fat as 6.5:1 or greater.
Eventually, E98 will be necessary to support the boost pressures I need to cram the amount of airflow I am aiming for through the poor lil SOHC.
And that 2150cc/min is @ 43psi, the Fits stock regulator runs 52psi to get some more headroom. At 52psi, they will move more. I can run more or less based on needs, up to the limitaions of the system I put behind them. But because of some of the flow properties of ethanol, they typically seem to max out at basically 1850cc/min @ 43 psi.
The Bosch pumps in parallel, run @ 16.5v on a 40A Kenne Bell boost-a-pump can support just enough for all for all of that. I'll be using the stockers as the primaries for cruise and idle, and then have the 2150s kick in referencing load.
For instance, Our motors dyno stock around 90whp. In the medium term, I want to make 300whp.
Long term, I want to make 500whp, granted I am going t be winding the motor out very high which will help.
This would require a density ratio of about 5.66, and with 70% compressor efficiency, and 80% charge cooler efficiency, the rough math suggest as much as 74psi boost is required. This could require a switch to methanol, hence the 2150s.
The relief valve cracking pressure on the pumps is listed @120psi. That leaves me about 3 psi head room, if I choose to run the injectors with a BFP of 43psi.
And the stockers will give me just shy of 800cc/min extra.
On E98 - 1850cc injectors by themselves @ 43psi will support ~76lbs/min airflow at 80% IDCs and 95lbs/min @ 100% IDC.
On Methanol, where stoich is 6.4:1AFR and often runs at 4.5:1 or greater under full load... it'll support about 40% less airflow.
So maxing out the injector @ 43 psi will get me about 57lbs/min, which based on my estimated BSFC at 74psi boost should be just enough to get me to 500whp.
So planning on E98, expecting to go to M100 potentially. Hence two rails, 8 injectors and more than 9L/min support. May need more fuel pump though.
I think having to go to a mechanical pump like a Weldon, crank/cam driven on a Fit would be worth it just for shits and giggles.
If your bored, try playing with these, itll help explain what I am rambling about lol:
http://pics.tdiclub.com/data/500/Turbo_PR_calcs1.xls
http://www.not2fast.com/turbo/glossa...orDutyCycle=85
http://www.turbodriven.com/performan...6_wrsin=92044&
Gas stoich is 14.7:1, under boost on a high comp motor you may run as rich as 10.5:1AFR.
E98 scale AFR stoich is 9:1, and under boost you may have to run as fat as 6.5:1 or greater.
Eventually, E98 will be necessary to support the boost pressures I need to cram the amount of airflow I am aiming for through the poor lil SOHC.
And that 2150cc/min is @ 43psi, the Fits stock regulator runs 52psi to get some more headroom. At 52psi, they will move more. I can run more or less based on needs, up to the limitaions of the system I put behind them. But because of some of the flow properties of ethanol, they typically seem to max out at basically 1850cc/min @ 43 psi.
The Bosch pumps in parallel, run @ 16.5v on a 40A Kenne Bell boost-a-pump can support just enough for all for all of that. I'll be using the stockers as the primaries for cruise and idle, and then have the 2150s kick in referencing load.
For instance, Our motors dyno stock around 90whp. In the medium term, I want to make 300whp.
Long term, I want to make 500whp, granted I am going t be winding the motor out very high which will help.
This would require a density ratio of about 5.66, and with 70% compressor efficiency, and 80% charge cooler efficiency, the rough math suggest as much as 74psi boost is required. This could require a switch to methanol, hence the 2150s.
The relief valve cracking pressure on the pumps is listed @120psi. That leaves me about 3 psi head room, if I choose to run the injectors with a BFP of 43psi.
And the stockers will give me just shy of 800cc/min extra.
On E98 - 1850cc injectors by themselves @ 43psi will support ~76lbs/min airflow at 80% IDCs and 95lbs/min @ 100% IDC.
On Methanol, where stoich is 6.4:1AFR and often runs at 4.5:1 or greater under full load... it'll support about 40% less airflow.
So maxing out the injector @ 43 psi will get me about 57lbs/min, which based on my estimated BSFC at 74psi boost should be just enough to get me to 500whp.
So planning on E98, expecting to go to M100 potentially. Hence two rails, 8 injectors and more than 9L/min support. May need more fuel pump though.
I think having to go to a mechanical pump like a Weldon, crank/cam driven on a Fit would be worth it just for shits and giggles.
If your bored, try playing with these, itll help explain what I am rambling about lol:
http://pics.tdiclub.com/data/500/Turbo_PR_calcs1.xls
http://www.not2fast.com/turbo/glossa...orDutyCycle=85
http://www.turbodriven.com/performan...6_wrsin=92044&
Last edited by DiamondStarMonsters; 02-17-2012 at 01:51 PM.
#23
02-17-2012 | 05:48 PM
Meanwhile, back in the non-automotive world...lol
What I want to do within the next 2-3 years:
SSR MS1-R, Work CR Kai, or Volk VR G2 wheels
Rear sway bar
T1R B-Pipe
Mugen front grill
Racing seats
Valve cover
Mugen/J's/Spoon oil and radiator caps
Engine bay dress up kit
Headliner wrapped
CF interior trim
Maybe a K swap in 10+ years if I don't go FI before that.
What I want to do within the next 2-3 years:
SSR MS1-R, Work CR Kai, or Volk VR G2 wheels
Rear sway bar
T1R B-Pipe
Mugen front grill
Racing seats
Valve cover
Mugen/J's/Spoon oil and radiator caps
Engine bay dress up kit
Headliner wrapped
CF interior trim
Maybe a K swap in 10+ years if I don't go FI before that.
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