E85 with this fuel set up work?
04-18-2019, 06:24 AM
#11
ill break down what he was saying a bit. psi is a irrelevant number. literally the only time that number matters is estimating how much psi you will need to run to achieve a hp goal and select an appropriate sized map sensor for that goal. psi does not make power, CFM does. how much CFM of air a turbo pumps out at a given psi varies greatly between turbos. making up some numbers here to provide an example, lets say a greddy turbo kit at 15psi makes 300whp vs guys on gtx35 making over 400 on 15psi. thats because the gtx flows more cfm at a given psi number.
that said there are a few really common turbos used on s2k's (gt30,gt35, 5858, 6262,6266, etc) so when people say 15psi on a 6262 people have a general idea of what that translates into....just saying 15psi and leaving out turbo info we have no idea
that said there are a few really common turbos used on s2k's (gt30,gt35, 5858, 6262,6266, etc) so when people say 15psi on a 6262 people have a general idea of what that translates into....just saying 15psi and leaving out turbo info we have no idea
04-18-2019, 08:03 AM
#12
I am also currently running a 200 series sxe. Get the 1.00 turbine housing. The others will choke the motor up top. You can look at my f24 build diary for the dyno chart. It maxxed out at a hair under 600hp @27psi
The following users liked this post:
S2kMano (08-14-2019)
04-20-2019, 08:42 AM
#13
04-20-2019, 11:01 AM
#14
I'm at 620/480 on E85. I'm running a Walbro 450 in tank feeding a surge tank with twin AEM 320's, -8an feed / -6an return lines. I was running FID 1200cc injectors but just put in some new ID1300 x2's for a little more headroom (haven't tuned them yet)
The following users liked this post:
S2kMano (08-14-2019)
04-20-2019, 03:43 PM
#17
ill break down what he was saying a bit. psi is a irrelevant number. literally the only time that number matters is estimating how much psi you will need to run to achieve a hp goal and select an appropriate sized map sensor for that goal. psi does not make power, CFM does. how much CFM of air a turbo pumps out at a given psi varies greatly between turbos. making up some numbers here to provide an example, lets say a greddy turbo kit at 15psi makes 300whp vs guys on gtx35 making over 400 on 15psi. thats because the gtx flows more cfm at a given psi number.
that said there are a few really common turbos used on s2k's (gt30,gt35, 5858, 6262,6266, etc) so when people say 15psi on a 6262 people have a general idea of what that translates into....just saying 15psi and leaving out turbo info we have no idea
that said there are a few really common turbos used on s2k's (gt30,gt35, 5858, 6262,6266, etc) so when people say 15psi on a 6262 people have a general idea of what that translates into....just saying 15psi and leaving out turbo info we have no idea
A 6262 doesn't flow the same through the exhaust side as a 6870. I prefer diameter to the small side of the wheel...that would be a 82mm/71mm rated for 750hp to 92mm/79mm rated for 1100hp. The bigger turbo would produce that pressure for the same air mass at a lower compressor speed and would probably wastegate more of the exhaust resulting lower back pressure and a lower expansion ratio in the turbine. It wouldn't produce more power. 15psi into a 2L engine at 8000rpm with 95 VE is the same amount of air burned with the same amount of fuel.
All of the sizing programs only count intake side parameters presumably because the turbo manufacturer already figured out the exhaust. 15psi at a specific IAT would determine the density of air; displacement, engine speed, and VE determine the volume. Combined that determines the mass which determines the power created.
Garret Boost Advisor: https://www.garrettmotion.com/boostadviser/. They lay out the calculations here: https://www.garrettmotion.com/racing...hoose-a-turbo/
A 2017 presentation on turbo modeling that might be interesting: https://www.ethz.ch/content/dam/ethz...r_Modeling.pdf
04-22-2019, 04:35 AM
#18
A 6262 doesn't flow the same through the exhaust side as a 6870. I prefer diameter to the small side of the wheel...that would be a 82mm/71mm rated for 750hp to 92mm/79mm rated for 1100hp. The bigger turbo would produce that pressure for the same air mass at a lower compressor speed and would probably wastegate more of the exhaust resulting lower back pressure and a lower expansion ratio in the turbine. It wouldn't produce more power. 15psi into a 2L engine at 8000rpm with 95 VE is the same amount of air burned with the same amount of fuel.
All of the sizing programs only count intake side parameters presumably because the turbo manufacturer already figured out the exhaust. 15psi at a specific IAT would determine the density of air; displacement, engine speed, and VE determine the volume. Combined that determines the mass which determines the power created.
Garret Boost Advisor: https://www.garrettmotion.com/boostadviser/. They lay out the calculations here: https://www.garrettmotion.com/racing...hoose-a-turbo/
A 2017 presentation on turbo modeling that might be interesting: https://www.ethz.ch/content/dam/ethz...r_Modeling.pdf
All of the sizing programs only count intake side parameters presumably because the turbo manufacturer already figured out the exhaust. 15psi at a specific IAT would determine the density of air; displacement, engine speed, and VE determine the volume. Combined that determines the mass which determines the power created.
Garret Boost Advisor: https://www.garrettmotion.com/boostadviser/. They lay out the calculations here: https://www.garrettmotion.com/racing...hoose-a-turbo/
A 2017 presentation on turbo modeling that might be interesting: https://www.ethz.ch/content/dam/ethz...r_Modeling.pdf
04-22-2019, 03:36 PM
#19
As previously stated psi number without knowing the turbo is mostly irrelevant. It’s all about CFM
I just got off the dyno today on e85. Grams 1000, stock lines/pressure regulator, aeromotive 340 in surge tank. Garrett g25-660 just about 15lbs. 95% duty cycle at 480whp
I just got off the dyno today on e85. Grams 1000, stock lines/pressure regulator, aeromotive 340 in surge tank. Garrett g25-660 just about 15lbs. 95% duty cycle at 480whp
04-22-2019, 04:54 PM
#20
As previously stated psi number without knowing the turbo is mostly irrelevant. It’s all about CFM
I just got off the dyno today on e85. Grams 1000, stock lines/pressure regulator, aeromotive 340 in surge tank. Garrett g25-660 just about 15lbs. 95% duty cycle at 480whp
I just got off the dyno today on e85. Grams 1000, stock lines/pressure regulator, aeromotive 340 in surge tank. Garrett g25-660 just about 15lbs. 95% duty cycle at 480whp
Not bad