Dyno numbers on E85
02-23-09, 12:40 PM
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Dyno numbers on E85
Just came back from alex shop (the one who tunes my car)
and On E85 with a GT-47 (custom turbo) on 20lbs 699hp. Im waiting on him to give me the dynosheet! 4x1600 injectors
S4 rotors
p.s. not my car but a customers
and On E85 with a GT-47 (custom turbo) on 20lbs 699hp. Im waiting on him to give me the dynosheet! 4x1600 injectors
S4 rotors
p.s. not my car but a customers
02-23-09, 01:12 PM
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699 are you kidding me 
you should have add one more pound of boost and get over 700 haha , jk .. Dont know much about E85 besides being fuel made of plants... Is it good for our cars?
you should have add one more pound of boost and get over 700 haha , jk .. Dont know much about E85 besides being fuel made of plants... Is it good for our cars?
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02-23-09, 03:20 PM
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80mm im trying to find out what percent injectors causeonly 4x1600 is crazy. HOWEVER ITS A FREAKING BIG TURBO. GT47
i might not be able to get the sheet until tomorrow.
800 & some change on the motor
went to the track on prelli street tires and misshifted the whole way through a 11.8 @ 125 & 11.1 @ 131 and broke the rear end!
i might not be able to get the sheet until tomorrow.
800 & some change on the motor
went to the track on prelli street tires and misshifted the whole way through a 11.8 @ 125 & 11.1 @ 131 and broke the rear end!
02-23-09, 03:52 PM
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02-23-09, 04:38 PM
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No way he got that much HP with just 4x1680cc injectors. I dynoed mine at 530rwhp with 4x1680cc injectors and hit 97% duty cycle.
This was on my old 13b-rew BP engine and a T04Z turbo. And 1.35 bar of boost. And a fuel pressure set to 45 psi at 0 psi of vacume/boost.
If he got 699hp the dyno is way off on the numbers. Cause u will get max 600hp at the flywheel with 4 injectors.
JT
This was on my old 13b-rew BP engine and a T04Z turbo. And 1.35 bar of boost. And a fuel pressure set to 45 psi at 0 psi of vacume/boost.
If he got 699hp the dyno is way off on the numbers. Cause u will get max 600hp at the flywheel with 4 injectors.
JT
02-23-09, 05:05 PM
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/\ DYNODYNAMICS. ive seen the car it has only 4 1600 injectors. and he runs on e85. believe it or not!
there was a guy on here making 670 with 100/1600's with a gt42!
there was a guy on here making 670 with 100/1600's with a gt42!
02-24-09, 08:24 PM
#17
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i don't think so... not disputing your hp necessarily but definitely don't buy 4 1600 injectors w E85.
here's how i see it.
it takes 1.92 CFM to make one rotary rear wheel hp.
699 times 1.92 is 1342 CFM.
1342 CFM/14.471 is 92.72 lbs per minute of air.
let's say you did it at an AFR of 11.
92.72 pounds of air/ 11 is 8.43 pounds of gasoline.
but you didn't do it on gas... you did it on ethanol (i know E85 is 85/15... just hang with me.)
the equivalent Lamda to 11 gas is 4.8! if you were running 100% ethanol you would burn 19.32 pounds of ethanol per minute to make the same 11 AFR.
(alcohol has 9500 BTUs V gasoline at 18,400 BTUs per pound. the two quantities generate approx 184,000 BTUs)
converting from pounds per minute to CC/Minute:
to make 699 rw rotary hp on gasoline requires 5188 CC/Min
to make 699 rw rotary hp on (100%) ethanol requires 11,097 CC/Min
to do it on E85 takes 10,210 CC/Min
you have 4 1650 CC Min injectors.... that's 6600 CC/Min
that works out to 500 hp max at 100% duty cycle.
the car has either a whole lot of additional injectors or there's a typo on the hp.
FWIW i have a friend that makes 1000 rw rotary hp on 100% methanol and he has 14 1650 CC injectors.
'nothing personal here but it doesn't add up and will be interesting to hear the rest of the story.
one afterthought... injector flow rates are at a given pressure.. raise the pressure and you will get more flow. however, the increase in flow is the square root of the % change. in other words, if you moved pressure from 40 to 50, that would be a 25% increase in pressure but only a 5% increase in flow.
howard coleman
here's how i see it.
it takes 1.92 CFM to make one rotary rear wheel hp.
699 times 1.92 is 1342 CFM.
1342 CFM/14.471 is 92.72 lbs per minute of air.
let's say you did it at an AFR of 11.
92.72 pounds of air/ 11 is 8.43 pounds of gasoline.
but you didn't do it on gas... you did it on ethanol (i know E85 is 85/15... just hang with me.)
the equivalent Lamda to 11 gas is 4.8! if you were running 100% ethanol you would burn 19.32 pounds of ethanol per minute to make the same 11 AFR.
(alcohol has 9500 BTUs V gasoline at 18,400 BTUs per pound. the two quantities generate approx 184,000 BTUs)
converting from pounds per minute to CC/Minute:
to make 699 rw rotary hp on gasoline requires 5188 CC/Min
to make 699 rw rotary hp on (100%) ethanol requires 11,097 CC/Min
to do it on E85 takes 10,210 CC/Min
you have 4 1650 CC Min injectors.... that's 6600 CC/Min
that works out to 500 hp max at 100% duty cycle.
the car has either a whole lot of additional injectors or there's a typo on the hp.
FWIW i have a friend that makes 1000 rw rotary hp on 100% methanol and he has 14 1650 CC injectors.
'nothing personal here but it doesn't add up and will be interesting to hear the rest of the story.
one afterthought... injector flow rates are at a given pressure.. raise the pressure and you will get more flow. however, the increase in flow is the square root of the % change. in other words, if you moved pressure from 40 to 50, that would be a 25% increase in pressure but only a 5% increase in flow.
howard coleman
Last edited by Howard Coleman; 02-24-09 at 08:32 PM.
good info.
02-25-09, 09:31 AM
#19
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/\ if i take a picture of the car i will have proof so saturday when i go to the shop i can shut you up. Just hold your horses till saturday 
02-25-09, 10:21 AM
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i'm not doubting what you said but one person proved this is not possible because of the fuel requirement. this one guy told me he made 608hp at 18psi on pump gas with meth injection. then we asked him for a dyno sheet he never provided it. another time he said the car made 666hp then when he showed us the chart it was 530hp X 1.25. he calculated it because the run was made on a mustang dyno. so all i'm saying now is provide some proof aka dyno sheet like Mr Coleman enlightened us.
02-26-09, 07:47 AM
#24
i was also at the track on sunday and although i don't remember the trap speed i do remember that one of his best times was 11.2......i don't claim to know the HP of the car but the car has power. not easy to run that time on street tires. there was a lot of wheel spin....as you can imagine.
