trying to get to 500hp
12-23-11, 10:03 AM
#52
Rotating Performance.
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BW S366 flow = 80lbs/min.
80lbs X 14.471 = 1157.68.
1157.68 / 1.92 = 602 RRWHP!!!
No need for a bigger turbo, the only thing (IMO) that's an issue are your Bosch 1600 injectors
I would look into injector dynamics 2000.
80lbs X 14.471 = 1157.68.
1157.68 / 1.92 = 602 RRWHP!!!
No need for a bigger turbo, the only thing (IMO) that's an issue are your Bosch 1600 injectors
I would look into injector dynamics 2000.
12-23-11, 07:58 PM
#53
Senior Member
Thread Starter
Well the tuner didn't check the boost controller so it was on safety setting to 17 psi he told me the turbo was to small I would have prefered to stay with the s360 knowing what I know now
12-26-11, 01:10 PM
#54
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Thread Starter
then which borg warner turbo should i use for 450-500hp at under 20psi?
12-27-11, 09:44 AM
#57
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The S366 is a really nice turbo and IMO I see no reason in changing it or the MicroTech. If you plan on staying with the same tuner build around his likes/dislikes, maybe look into running water only not 50/50 it makes things a bit more simple for your tuner just my .02
12-27-11, 02:23 PM
#58
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Thread Starter
Going with a different tuner my current tuner is 2 difficult to get a hold of to tune and my new one likes power fc
01-14-12, 12:16 PM
#68
Racing Rotary Since 1983
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the S366, according to BW's compressor map makes 79 pounds at 40.5 psi. so it will make your 500 target.
dropping down to 18 psi, 71 pounds per minute are available tops.
so at 71
71 X 14.471 = 1027 CFM/ 1.92 = 535 rotary rw SAE hp is the max target
let's see if you have the fuel to do it...
we will disregard the AI BTUs as they are minimal on the plus side from the meth and are cancelled out from the water.
let's assum you are running 11.3 AFR
71 pounds of air divided by 11.3 AFR = 6.28 pounds of fuel
gasoline weighs 6.35 pounds per gallon.
6.28/6.35 = .989 gallons of gas per minute needed at 71 pounds of air
.989 gallons per minute is 3743 CC/Minute
550 X 2 = 1100
1600 X 2 = 3200
total is 4300 CC/Minute
subtract at least 10% for lag (delivery slippage due to opening/closing)
injectors are rated at wide open, no open/close.........
4300 X . 9 = 3870
injectors overheat malfunction don't work linearly above 85% duty so you need another 17% to not see above 85%
as you can see, after deducting for lag you are still needing to run them wide open which is a losing situation.
my guess is you ran (just) out of fuel deliverability.
howard
dropping down to 18 psi, 71 pounds per minute are available tops.
so at 71
71 X 14.471 = 1027 CFM/ 1.92 = 535 rotary rw SAE hp is the max target
let's see if you have the fuel to do it...
we will disregard the AI BTUs as they are minimal on the plus side from the meth and are cancelled out from the water.
let's assum you are running 11.3 AFR
71 pounds of air divided by 11.3 AFR = 6.28 pounds of fuel
gasoline weighs 6.35 pounds per gallon.
6.28/6.35 = .989 gallons of gas per minute needed at 71 pounds of air
.989 gallons per minute is 3743 CC/Minute
550 X 2 = 1100
1600 X 2 = 3200
total is 4300 CC/Minute
subtract at least 10% for lag (delivery slippage due to opening/closing)
injectors are rated at wide open, no open/close.........
4300 X . 9 = 3870
injectors overheat malfunction don't work linearly above 85% duty so you need another 17% to not see above 85%
as you can see, after deducting for lag you are still needing to run them wide open which is a losing situation.
my guess is you ran (just) out of fuel deliverability.
howard
01-14-12, 01:45 PM
#70
Senior Member
Thread Starter
wow yeah i spoke to a guy and he says my stock 550 injector arnt gonna do it so im gonna do the 1d 1000s on the low and 1600 on the high and will see what happens...also i was getting some stutter at full throttle with stock spark plugs and then we changed it to 115 on the leading and it went away anyone know the reason why that happens?
01-14-12, 01:48 PM
#71
Senior Member
Thread Starter
yeah it was a cold night so it was at 24psi i think i boost spiked and thats what happen....do you think i can do 500 at 18 with a good tuner also im running bosch 044 pump
01-14-12, 01:51 PM
#72
Senior Member
Thread Starter
01-14-12, 01:52 PM
#73
Racing Rotary Since 1983
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you want 10 heat range in all four holes... running to hot a plug retains heat around the plug which makes the area rise and lifts the apex seal off the housing. 10.5s would also work for you.
take a look at your plugs. do they look like they are running hot? what are you doing for premix in your gas?
what ignition? you will need a but more than stock above 400++ hp.
you are running a 1.3 L motor so making 400/500 hp you are generating alot more heat than the typical piston motor.... that's why you need some sort of AI to cool things a bit.
howard
take a look at your plugs. do they look like they are running hot? what are you doing for premix in your gas?
what ignition? you will need a but more than stock above 400++ hp.
you are running a 1.3 L motor so making 400/500 hp you are generating alot more heat than the typical piston motor.... that's why you need some sort of AI to cool things a bit.
howard
01-14-12, 01:53 PM
#74
https://www.rx7club.com/build-threads-294/juanmas-s5-tii-gt35r-start-dyno-tuning-983611/
granted that was an FC i built but the REW intake flows more as well as standard streetporting so 500 would be easily achievable at about 17psi on pump gas. the injector combo was 720/1680.
i ran 10.5 in leading and 9's in trailing, the trailings don't need to match the leadings as they don't run quite as hot and the surface discharge plug is superior in these engines so i try to retain them whenever possible. didn't even give me a hiccup at 10:1 AFR while spraying AI full trim with standard FC coils, but it did have a HKS Twin Power to back it up.
granted that was an FC i built but the REW intake flows more as well as standard streetporting so 500 would be easily achievable at about 17psi on pump gas. the injector combo was 720/1680.
i ran 10.5 in leading and 9's in trailing, the trailings don't need to match the leadings as they don't run quite as hot and the surface discharge plug is superior in these engines so i try to retain them whenever possible. didn't even give me a hiccup at 10:1 AFR while spraying AI full trim with standard FC coils, but it did have a HKS Twin Power to back it up.
Last edited by RotaryEvolution; 01-14-12 at 02:01 PM.