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Wanted to share another EFR success story. Just finished up on the dyno this morning and will be running the first event this weekend. Here are some specs and a few pictures. You can see many more pictures here if interested: FP Miata ? Slambert Performance Engineering
Rusty beyond repair 2004 MSM and clean southern rust free 1999 tub are the donor vehicles for this build.
Purpose: Autocross (some track days here and there), specifically built for FP (F Prepared) Weight: 2058 without ballast, but has to be ballasted up to 2206.
Engine:
Typical boost motor with a few exceptions...
MSM Head and Block
11:1 Pistons
Ported Head
+1 intake, +2 exhaust
TSE manifold
EFR6758
Custom 3in downpipe and 3in exhaust
Gutted MSM intake manifold
Skunk2 64mm Throttle Body
Customer V-mount intercooler/radiator (FD RX7 components)
Power:
Dyno below (400/349) is at 21psi and is the final pull. We did have one previous pull that crept up to 22.8psi and put down 411/358, but it was early in the tuning session and was not a curve worth displaying.
E85
Chassis:
Custom cage
Delrin bushing througout
Xidas
Electric (adjustable) power steering - GM retrofit.
Depowered rack
Swaybars and spring rates TBD. I have a starting point, but I'm sure that will change.
15x10 6ULs with 275 or 295 A7 (or Hoosier/Avon slicks) - Pictures are 15x9s with 245s for the street/rain/etc
Driveline:
Stock MSM 6spd
ACT clutch / flywheel
Stock 4.1 torsen diff out of MSM
Still a lot of work to do before I would consider it a finished product, but wanted to share what I have so far.
Engine:
Typical boost motor with a few exceptions...
MSM Head and Block
11:1 Pistons
Ported Head
+1 intake, +2 exhaust
TSE manifold
EFR6758
Custom 3in downpipe and 3in exhaust
Gutted MSM intake manifold
Skunk2 64mm Throttle Body
Customer V-mount intercooler/radiator (FD RX7 components)
Power:
Dyno below (400/349) is at 21psi and is the final pull. We did have one previous pull that crept up to 22.8psi and put down 411/368, but it was early in the tuning session and was not a curve worth displaying.
E85
I love it. 349tq at 21psi and 368tq at 23psi indicates that the turbo is still totally happy in that boost range. An intake manifold would probably be worth a lot, since you found 19ft.lbs but only 11whp.
Dyno pull starts at 2600rpm and the ****** still makes 200ft.lbs by 3100rpm, on a Mustang dyno. If that's not response and low-end power, I don't know what is. ******* wild.
I can picture colipto salivating over this thread.
Originally Posted by Savington
I love it. 349tq at 21psi and 368tq at 23psi indicates that the turbo is still totally happy in that boost range. An intake manifold would probably be worth a lot, since you found 19ft.lbs but only 11whp.
Dyno pull starts at 2600rpm and the ****** still makes 200ft.lbs by 3100rpm, on a Mustang dyno. If that's not response and low-end power, I don't know what is. ******* wild.
How much increase would you expect with a squaretop here? Or would that be a silly option instead of just going for the modified honda intake?
On an autocross car, he's got the perfect setup. On a road race car, I'd expect a Squaretop to be worth 10-15whp on top, more above 6500rpm. With the 5A cam in that car, it should carry better than that, but the IM restricts it.
His Facebook and fprod build thread on here talk about it. It's custom, from a Cruze or something weird. And a guy makes a controller for it. I can link when on a comp.
His Facebook and fprod build thread on here talk about it. It's custom, from a Cruze or something weird. And a guy makes a controller for it. I can link when on a comp.
Yeah, its pretty common with some other cars IIRC. Theres like a billion different chevys that use the same or almost the same unit. I wanted to do it on my car instead of the volvo pump but modifications to the steering column inside the passenger compartment arent legal in my class.
Saturn Ion - from 2003 to 2006 - only in steering column with metal ECU case.
cliffnotes : steering column needs wired directly to the battery, requires an 80a feed circuit, control circuit much lower obviously, will require mild fabrication to mount, most utilize full saturn column, with a re-welded intermediate shaft, there is a thermal shuftdown built in, and there are reports that the motor overheats on autocross cars, but not rallycross cars, so your results may vary.
On an autocross car, he's got the perfect setup. On a road race car, I'd expect a Squaretop to be worth 10-15whp on top, more above 6500rpm. With the 5A cam in that car, it should carry better than that, but the IM restricts it.
You'd lose the msm intake cam then, but I think the VVT's gains are greater. I see what you're asking though re:using the squaretop to get upper end gains and using the vvt to prop up the midrange.
Bench race all you want, but with a build like this he probably chose the parts he did with a reason.
Correct, but still curious about how all the various combinations play out. More of a question for folks like Savington who have played a bit of combination roulette.
Apologize for the derail though. Super excited to see how things play out for the OP.
Got to drive this thing yesterday, it's a hoot. Shawn looks to have not mentioned that since he is running in FP, he has to run a 46MM restrictor on the inlet side of the turbo, which is why more boost didn't do much for him. Was very impressed with the feel of the Xidas and even the lateral grip of the VR1s, which did pretty well on a very loose surface.
03-31-2017, 04:10 PM
Meet the Ogre....EFR6758 purpose built rase car.
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