Martin's 9180 EFR 1.45 Twin Scroll
 

Martin had previously been using an 8374 on a stock ECU in his Evo IX and made 750whp with a powerband that felt like a big block Chevy on the street. Like many things this was fun for awhile and needed stepped up. Using the foundation he already had, the plan went in motion to add the 9180. Martin originally was wanting to use the 1.05 housing like he had on his 8374 but I urged him to wait until the 1.45 was released. I think there was definitely a reason too {thumbup}

What we started with -

Evo IX

EnglishRacing LR2.4
Bushmaster raceported cylinder head
GSC R2 camshafts
Magnus V5
Wiseco 9:1 compression
R&R Rods
Full Race twin scroll turbo kit
ETS 4" FMIC
Fuel Injector Clinic 2150cc injectors
Twin Bosch 044 with surge tank
AEM series 2 and AQ1 for additional datalogging
Zeitronix ECA
E85

Attachment 273566

Higher boost only yielded more backpressure and no additional power on this setup, and shaftspeed was close to being maxxed. Like the last EFR on this car the dyno only tells half the story. On the street the car doesnt feel any different than the 8374, probably the most responsive 850whp 4 cylinder I have ever driven.

The tune is a little conservative since the car is being purposed for roll race events more than drag racing or anything short pull. The video will be up in the near future.

So the 1.45 was definitely needed? Is something else holding it back on the exhaust side or is it just maxed?

It could make a little more power with timing most likely, but backpressure exceeds 1:1 at 40psi with the 1.45 even. Turbine wheel size is the likely culprit.

Is the dyno graph of the 8374 posted. Would like to see a comparison.

looks like lots of fun on a highway pull!

In the EFR thread but I will bring it over here.

Attachment 273563

Corrected numbers to keep it comparable.

nice, do you have a pull we can see?

AWESOME! Been waiting to see this graph. I would be interested to see a larger cam used to see if it helps even more up top. Doesn't seem like this setup has any problems making torque.

good work!

Must admit that I really like the EFR turbos. One of these days I'll have to put one on my Evo.

The video is being put together still.

Wow, 200whp before 4k rpm and still making over 800whp.

Can't wait to drive it again, good job by the English crew again{thumbup}
These EFR's with the right combos make Evo's into beasts, I've always wanted the fattest power curve I could get with the most power out the top. So that's the quest, will take it to a few races again this year and see how she does. Was very impressed how well the 8374 on this car did at auto cross too(in the meat of the power almost the whole time) .
Will try this combo out at auto cross too this year, including 1/2 mile.

good comparison. it looks like it lost 100ft/lbs at 4200rpm. and the tq rise it takes to go from 200tq to 300tq doubled from 500rpm to 1000rpm. those are definitely losses you can feel. then the power gain from 5000-7000rpm is only 40-50hp. the high rpm power gains are nice, but I dont see how you can say the 1.45 was needed. the tq curve shapes are nearly identical. looks like the 1.05 on the smaller snail was doing quite well. overall I like the power curve of the 8374. the 9180 in this case looks too much like on and off switch.

nice numbers, Congrats!