SS FP RED for road race?
Sounds like you want EFR7670 or GTX3076.
For absolutely amazing experience up to 30-32psi, EFR7670.
There is plenty of data on this forum, check R/TERnie's build thread to see more.
On his 2.2 in 4th gear it was fully spooled about 3500rpm.
2.3 will spool it sooner. For each 6mm of stroke spool seems to improve by 250rpm.
FYI: for roadcourse, depending on a lot of things, you may want to know that many Portland area SCCA competitors use 2.3 with EFR7163.
BrianAWD is one that comes to mind.
ON track you cannot run 30-35psi and stay in one piece: 25-26psi is likely the highest boost any experienced builder/tuner of racing Evos would recommend.
And at that pressure EFR7163 is singing all the way to 7800rpm on Brian's Evo 2.3.
For absolutely amazing experience up to 30-32psi, EFR7670.
There is plenty of data on this forum, check R/TERnie's build thread to see more.
On his 2.2 in 4th gear it was fully spooled about 3500rpm.
2.3 will spool it sooner. For each 6mm of stroke spool seems to improve by 250rpm.
FYI: for roadcourse, depending on a lot of things, you may want to know that many Portland area SCCA competitors use 2.3 with EFR7163.
BrianAWD is one that comes to mind.
ON track you cannot run 30-35psi and stay in one piece: 25-26psi is likely the highest boost any experienced builder/tuner of racing Evos would recommend.
And at that pressure EFR7163 is singing all the way to 7800rpm on Brian's Evo 2.3.
FYI, R2 even on stroker are not all they were meant to be.
Most who owned, sold them, for S2.
I see considerable added lag all the way up to 5000-5500 where S2/R2 equalize, than maybe R2 can make tiny bit more top end, but seems not worth the trade off unless its a 1/2 mile race car.
Most who owned, sold them, for S2.
I see considerable added lag all the way up to 5000-5500 where S2/R2 equalize, than maybe R2 can make tiny bit more top end, but seems not worth the trade off unless its a 1/2 mile race car.
Sounds like you want EFR7670 or GTX3076.
For absolutely amazing experience up to 30-32psi, EFR7670.
There is plenty of data on this forum, check R/TERnie's build thread to see more.
On his 2.2 in 4th gear it was fully spooled about 3500rpm.
2.3 will spool it sooner. For each 6mm of stroke spool seems to improve by 250rpm.
FYI: for roadcourse, depending on a lot of things, you may want to know that many Portland area SCCA competitors use 2.3 with EFR7163.
BrianAWD is one that comes to mind.
ON track you cannot run 30-35psi and stay in one piece: 25-26psi is likely the highest boost any experienced builder/tuner of racing Evos would recommend.
And at that pressure EFR7163 is singing all the way to 7800rpm on Brian's Evo 2.3.
For absolutely amazing experience up to 30-32psi, EFR7670.
There is plenty of data on this forum, check R/TERnie's build thread to see more.
On his 2.2 in 4th gear it was fully spooled about 3500rpm.
2.3 will spool it sooner. For each 6mm of stroke spool seems to improve by 250rpm.
FYI: for roadcourse, depending on a lot of things, you may want to know that many Portland area SCCA competitors use 2.3 with EFR7163.
BrianAWD is one that comes to mind.
ON track you cannot run 30-35psi and stay in one piece: 25-26psi is likely the highest boost any experienced builder/tuner of racing Evos would recommend.
And at that pressure EFR7163 is singing all the way to 7800rpm on Brian's Evo 2.3.
Le sigh, I thinking am going to sell the R2 cams. I hate to take a hit on them but definitely want a broad power band and good all around performer. Purchased them a while ago, put them in vacuum bags with oil and set them on the shelf. Now it seems the hype is over and most are recommending me to go with the S2 for my goals.
my setup fits any IWG T4 EFR, has large bore runners too.. Personally I wouldnt run more than 7670.. and I would rather run a TS 7670 than a SS 7163
Attachment 325003
Who makes your setup? A IWG 7670 would definitely fit the bill. Does the setup fit with AC? It looks like it from the picture and is a must in Texas.
Last edited by mt057; Dec 27, 2017 at 04:13 PM.
Yeah, I prefer the TS too for response and spool... SS is probably worth 30 ish HP, but I am just guessing..
I designed and made it and yes it is AC compatible... Alpinaturbo here will run one on his evo 6 too.. we just cant decide if he should go 7163 or 7670....
The whole system did requre custom manifold, DP, but also new engine mount and I also changed the WG mount to a new design which I think is better than stock.. I also added a turbo support from below. Will post some pics on the whole system next week..
I designed and made it and yes it is AC compatible... Alpinaturbo here will run one on his evo 6 too.. we just cant decide if he should go 7163 or 7670....

The whole system did requre custom manifold, DP, but also new engine mount and I also changed the WG mount to a new design which I think is better than stock.. I also added a turbo support from below. Will post some pics on the whole system next week..
Yeah, I prefer the TS too for response and spool... SS is probably worth 30 ish HP, but I am just guessing..
I designed and made it and yes it is AC compatible... Alpinaturbo here will run one on his evo 6 too.. we just cant decide if he should go 7163 or 7670....
The whole system did requre custom manifold, DP, but also new engine mount and I also changed the WG mount to a new design which I think is better than stock.. I also added a turbo support from below. Will post some pics on the whole system next week..
I designed and made it and yes it is AC compatible... Alpinaturbo here will run one on his evo 6 too.. we just cant decide if he should go 7163 or 7670....

The whole system did requre custom manifold, DP, but also new engine mount and I also changed the WG mount to a new design which I think is better than stock.. I also added a turbo support from below. Will post some pics on the whole system next week..
I am hoping to make a decision this week on which setup to go with since the FP turbos are on sale and would help save some cash. I am starting to look heavily at the 7163 and 7670 though.
I think that once you decide to get a tubular manifold for stock frame turbo you could have had a full frame kit instead..
mind you, efr will require an aftermarket WG actuator, because stock one is too weak and a slimline fan.. so it is not a cheap kit by any means.. The first kit I made will run on 2.3 in the US... mine will be 2.0 on 7163.
Attachment 324995
mind you, efr will require an aftermarket WG actuator, because stock one is too weak and a slimline fan.. so it is not a cheap kit by any means.. The first kit I made will run on 2.3 in the US... mine will be 2.0 on 7163.
Attachment 324995
Looks good!
I already have a down pipe, O2 housing, 18psi waste gate actuator and slim fan with an EVO6 style radiator. So all I would need to go back to an FP RED is a new MHI housing, have it ported for the turbine and the turbo. I am considering picking up the cast race manifold to top it off though.
A good kit would be nice and an upgraded waste gate actuator would be a must with the 7163 or 7670 to help hold 30+. So many options.
I already have a down pipe, O2 housing, 18psi waste gate actuator and slim fan with an EVO6 style radiator. So all I would need to go back to an FP RED is a new MHI housing, have it ported for the turbine and the turbo. I am considering picking up the cast race manifold to top it off though.
A good kit would be nice and an upgraded waste gate actuator would be a must with the 7163 or 7670 to help hold 30+. So many options.
A properly sized twin scroll housing will have better spool up and transient response vs single scroll, and It won't hurt power.
Last edited by letsgetthisdone; Dec 28, 2017 at 12:48 PM.
Ayoustin, I think LetsGetThisDone meant that twin scroll Will Have better spool and transient response, but also hardly be done on power on top end to Single V-band Scroll.
He is proponent of twin scroll..likely fingers flying too fast
Kikiturbo said I am dweling 7163 vs 7670:
I like to research everything before making a choice.
I am finding evidence on E85, that on Evo 7670 will top out about 550-575whp. Eric (R/TErnie) has consistently done 550-557whp on his 2.2 EFR7670 and only upon pushing hard made it to 575whp.|
550whp was obtained at 30psi, with GSC S3 cams - which help especially top end.
While BrianAWD Evo 2.3 EFR7163 made an easy 549whp at same English Racing Dyno at 27psi.
And he used GSC S1 cams.
On pump twin scroll 7163 seems to make safe 450whp on stock block, possibly slightly more on built motor which you can push a bit more.
Eric (R/TErnie) made 450whp roughly on 92 pump at 21psi on 7670.
Perhaps on Pump gas EFR7670 has an advantage over 7163, but on E85, it seems they are closer than we thought.
With 7163 much improved spool, perhaps 300+rpm sooner, and likely better transient response, I am re-thinking my 7670 proposal.
He is proponent of twin scroll..likely fingers flying too fast
Kikiturbo said I am dweling 7163 vs 7670:
I like to research everything before making a choice.
I am finding evidence on E85, that on Evo 7670 will top out about 550-575whp. Eric (R/TErnie) has consistently done 550-557whp on his 2.2 EFR7670 and only upon pushing hard made it to 575whp.|
550whp was obtained at 30psi, with GSC S3 cams - which help especially top end.
While BrianAWD Evo 2.3 EFR7163 made an easy 549whp at same English Racing Dyno at 27psi.
And he used GSC S1 cams.
On pump twin scroll 7163 seems to make safe 450whp on stock block, possibly slightly more on built motor which you can push a bit more.
Eric (R/TErnie) made 450whp roughly on 92 pump at 21psi on 7670.
Perhaps on Pump gas EFR7670 has an advantage over 7163, but on E85, it seems they are closer than we thought.
With 7163 much improved spool, perhaps 300+rpm sooner, and likely better transient response, I am re-thinking my 7670 proposal.











