Please post your E85 stock turbo IDC%
Jun 7, 2008, 10:15 PM
#1
Please post your E85 stock turbo IDC%
I'm trying to figure out what size injectors I need for an E85 tune. Looks like even with the knowledgeable shops injector selection is all over the map (pun intended).
RRE = 750cc
AMS = 880cc
English = 850-1,000cc
Vivid = 1,200cc
Please post your E85 injector size, max IDC%, and your PSI spike and PSI at red line.
By stock turbo, I mean VIII with VIII turbo, or IX with IX turbo , or VIII with IX turbo.
RRE = 750cc
AMS = 880cc
English = 850-1,000cc
Vivid = 1,200cc
Please post your E85 injector size, max IDC%, and your PSI spike and PSI at red line.
By stock turbo, I mean VIII with VIII turbo, or IX with IX turbo , or VIII with IX turbo.
Last edited by Jim in Tucson; Jun 9, 2008 at 10:12 PM.
Jun 7, 2008, 10:40 PM
#2
Evolved Member
iTrader: (1)
Join Date: Jul 2004
Location: Los Angeles
Posts: 851
Likes: 0
Received 0 Likes
on
0 Posts
I got tooned by RRE on my IX with stock turbo.
RC Engineering 1000cc injectors, 72% IDC @ 30psi on E85
55% IDC @ 22psi on Costco's finest 91 octane :P
With my old Denso 660cc injectors, i hit 125% IDC @ 28psi on E85.
RC Engineering 1000cc injectors, 72% IDC @ 30psi on E85
55% IDC @ 22psi on Costco's finest 91 octane :P
With my old Denso 660cc injectors, i hit 125% IDC @ 28psi on E85.
Jun 8, 2008, 07:39 AM
#5
Using skiracer as our only example so far, he's at 720cc, so with 880cc injectors his IDC would be 82%. That is right on the money in my book and confirms what I had already surmised. I'm thinking 880cc injectors are the way to go with the stock turbo and full bolt-ons.
Maybe AMS has done their research.
Hopefully we will get some more contributors to this thread.
Maybe AMS has done their research.
Hopefully we will get some more contributors to this thread.
Last edited by Jim in Tucson; Jun 8, 2008 at 08:17 AM.
Jun 8, 2008, 10:15 AM
#7
Evolved Member
iTrader: (1)
Join Date: Jul 2004
Location: Los Angeles
Posts: 851
Likes: 0
Received 0 Likes
on
0 Posts
Using skiracer as our only example so far, he's at 720cc, so with 880cc injectors his IDC would be 82%. That is right on the money in my book and confirms what I had already surmised. I'm thinking 880cc injectors are the way to go with the stock turbo and full bolt-ons.
Maybe AMS has done their research.
Hopefully we will get some more contributors to this thread.
Maybe AMS has done their research.
Hopefully we will get some more contributors to this thread.
Trending Topics
Jun 8, 2008, 01:41 PM
#8
Different evos with different mods and different boost control can hold more or less boost.
Example: Both evos hit 30psi peak. Both have 1000cc RC injectors. Evo A holds 20psi at 7000rpm, Evo B holds 22psi at 7000rpm. Which one would have higher peak IDC.
Jun 8, 2008, 07:01 PM
#9
Personally I think posting your max IDC at whatever RPM it happens at is better data as I know for a fact it's not 30psi of boost at your max IDC, which is probably around 7,xxx rpm.
Different evos with different mods and different boost control can hold more or less boost.
Example: Both evos hit 30psi peak. Both have 1000cc RC injectors. Evo A holds 20psi at 7000rpm, Evo B holds 22psi at 7000rpm. Which one would have higher peak IDC.
Different evos with different mods and different boost control can hold more or less boost.
Example: Both evos hit 30psi peak. Both have 1000cc RC injectors. Evo A holds 20psi at 7000rpm, Evo B holds 22psi at 7000rpm. Which one would have higher peak IDC.
You are correct, it can certainly make a big difference in injector flow. I improved the wording in the top post - I think.
Jun 8, 2008, 07:39 PM
#10
Bigger = better as long as your driveability isn't effected too badly, so if 1200s allow decent driveability get them. Always better to have head room than not to. Oh and if you are anything 100% or higher it is the same, because your injectors are static or always open, so now your fueling depends on the flow of your fuel pumps.
Jun 8, 2008, 07:43 PM
#11
If people have both data points, that is even better.
example: at 7000rpm, IDC is 84% and Boost is 21.4psi.
You can take the same Evo and have peak boost of 30, or 28, or 22 and if it's still 21.4 psi at 7000rpm, the peak IDC will be the same.
Jun 9, 2008, 04:52 PM
#15
Evolving Member
iTrader: (1)
Join Date: May 2007
Location: Portland, OR
Posts: 204
Likes: 0
Received 0 Likes
on
0 Posts
Bigger = better as long as your driveability isn't effected too badly, so if 1200s allow decent driveability get them. Always better to have head room than not to. Oh and if you are anything 100% or higher it is the same, because your injectors are static or always open, so now your fueling depends on the flow of your fuel pumps.