SSM RX7 Build

[cturbo28]

Anyone interested in seeing my FD project that I have been developing over the past two SCCA autocross seasons?

General Specs:

1993 base model FD.

Engine:
Stock re-man engine with about 6K on it.
Custom Precision Turbo HP5530SP with .78 AR T3 exhaust housing twin scroll.
Custom V-mount intercooler
Greddy elbow
Custom V-mount cross flow radiator "Afco"
Custom CAI 4"
Custom HPP Delrin engine mounts

Exhaust:

Custom 3.5" downpipe
Custom short runner turbo manifold divided with twin wastegates
Custom stainless flex joint
Custom 4" exhaust from DP.
Magna Flow 4" round exhaust
Custom 4" tip adjustable angles for sound restrictions

Fuel:

Bosch 044
Custom 5 gal aluminum cell
Custom fuel fill cap mounted on passenger side
-6 AN fuel lines
KG fuel rails
FPR aeromotive import style
Custom surge tank in-tank
ID2000 injectors

Electronics:

Haltech PS2000 tuned by Ludwig lmsefi.com
Haltech EGT's via CAN hub TC2 lmsefi.com
Haltech SSR for Electric water pump
AEM exhaust manifold pressure sensor lmsefi.com
AEM boost control pot lmsefi.com
Greddy boost gauge
NGK wideband lmsefi.com
LS2 coils (soon to be AEM)
Magnacore spark plug wires
NGK racing plugs (ouch) 10.5's
Greedy racing plugs 11's lmsefi.com

Suspension:

Custom valved Koni 28's aluminum body by Pro Parts
Custom spherical bearings on all pick up points.
Tri point front sway bar
Stock rear sway bar
Custom upper control arms ( adjustable on the car!) new design in progress
Custom lower front ball joint, replaced stock with spherical.
Rx7 store toe links and rear trailing arms

Shoes:

CCW 18x11 7.5 backspace fronts with Hoosier 315/30/18's
CCW 18x12 7.5 backspace rear with Hoosier 335/30/18's

Rain set up FNO1R-C 17x10 +35 All four 275/40/17's Hoosiers

Trans and stuff:

Stock trans with short shifter
Stock re-main flywheel
ACT pressure plate
LWFW (TBD) not installed at this time
TN clutch 4 puck solid disc
Kaaz diff set at 66%
Stock PPF
Delrin diff bushings
HPP racing diff brace
Custom HPP torque v-brace
4.10, 4.77, 4,44 gear ( trying to test to see which on is best for the car.


Aero:

Custom front splitter Aluma core ( made by Tomsn16)
New Ciro racing design rear wing.

Body:

Pettit rear flares
Custom English wheel rolled front fender to tuck the 315"s
Awesome bare custom hood with cut out for IC
Racing shield aluminum seats with custom aluminum mounts
Sparco steering wheel


Misc specs:

2510 lbs without driver
Relocated ABS system
Hawker battery relocated
Dyno sheet will be posted soon
SW20 EHPS mounted behind passenger seat.
EWP Craig Davis 7/21/12 installed


This is a picture of the last SCCA race last year held at our own Nashville Super Speedway in October.



Instead of flooding the Thread will a bunch of pictures I will just ad pics that people are interested in or request.

[djmtsu]

Looking good Carter!

Your car is a purposed built monster.

[calculon]

I'm interested in seeing pictures of the relocated ABS project.

[cturbo28]

Originally Posted by calculon

I'm interested in seeing pictures of the relocated ABS project.

Thanks for the interest. I will have to dig up some pictures on the ABS relocation. Here is a picture of the tank install with the ABS unit next to it. I mounted the ABS unit behind the passenger seat next to the tunnel. Also I pulled the ABS ECU from the Left rear and relocated it where the rear right speaker was located. I eliminated all the wiring from the driver side all the way around to the passenger side, the ABS ECU wiring harness basically circled the vehicle. I only had to splice about 10 wires to the unit itself. It was not as difficult as I thought it was.
I will dig up some more pictures, these are not that great for the ABS relocation. Also I used the -3AN speed flex lines with aluminum banjos from the unit all the way to each wheel.

Goals:

Weight reduction, relocate weight to the lightest corner of the car.

ABS ECU = 2.2 lbs
ABS unit = 14 lbs

relocated to right rear corner of car.

Removed 7 lbs of steel fittings, tees, brackets from the stock brake lines.

I have not had any issues with brakes, 2 seasons of racing so far. Well except for the master cylinder failing at NSS last year.

[cturbo28]

SpeedJunkie:

Thanks, I do have pictures of everything...Just need to find them all. I can post them slowly. I have the next two days off so I have plenty of time.
The FPR is just a compact design, nothing special. just smaller. I guess it sounds cool.

http://www.summitracing.com/parts/AEI-13105/



Pictures of the manifold build







I could not find a decent aftermarket fender to my liking so I had someone make some for me. The metal is really thin as you say but the English wheel does a nice job stretching the metal out. The only issue with this set up was cost. It really hurt the pocket.. The pictures do not do the fenders justice. They look stock. But try fitting 315's on 11" wide wheels with stock fenders.





I will make another post for the V-mount set up.

[speedjunkie]

Custom V-mount intercooler
Custom V-mount cross flow radiator
Custom CAI 4"
Custom 3.5" downpipe
Custom short runner turbo manifold divided with twin wastegates
Custom 4" exhaust from DP.
Magna Flow 4" round exhaust
Custom 4" tip adjustable angles for sound restrictions
Custom 5 gal aluminum cell
Custom fuel fill cap mounted on passenger side
FPR aeromotive import style
Custom surge tank in-tank
LS2 coils
Custom upper control arms ( adjustable on the car!) new design in progress
Custom lower front ball joint, replaced stock with spherical.
Custom torque v-brace
Awesome bare custom hood with cut out for IC
relocated ABS system


Do you have pics of these things? LOL!! I'm REALLY interested in the dual WG turbo manifold though. I've been wanting to do the EXACT same thing and I'd like to see what's possible. Are the runners equal length? What size WG are you using?

Also very interested in the custom VMIC. How big is the core on your IC? I'm looking to remake my IC for my V-mount as well. I've been wanting to do a vent in the hood like that too.

What is the v-brace you're talking about? And what about the FPR makes it euro style, what do you mean there? Really I'd just like to see how you have all this stuff set up.

I was thinking an english wheel could be used to change the fenders, but I'd been told the metal was too flimsy. Originally I was going to try to get mine done like that too but I went a different direction.

Pretty awesome, man! I'd actually like to see pics of the whole car but I know you don't want to flood the thread. This list would be cool but if you can at least put up pics of the VMIC and turbo manifold that would be great.

[MaczPayne]

SSM allows custom control arms? Hmmmm

[cturbo28]

Originally Posted by MaczPayne

SSM allows custom control arms? Hmmmm

Yes

Speedjunkie pics:

V-mount stuff,

HOOD, stripped of paint and cutting hole for IC vent.



Intercooler, core is 18x12x2.5, I also welded the IC pipes so I would eliminate hoses blowing off at a race.





4" CAI





AFCO dual pass radiator. This radiator is split in the center. The entry is on the passenger side and the water flows over and up to the driver side to exit. I also used the stock fans on the bottom.

[rx7 vinnie]

Carter is my hero........

[josh18_2k]

soooo you're not allowed to duct after the radiator, but intercooler is OK? sounds like that rule is broken.. (I'm XP btw, same ducting rules)

[cturbo28]

Originally Posted by josh18_2k

soooo you're not allowed to duct after the radiator, but intercooler is OK? sounds like that rule is broken.. (I'm XP btw, same ducting rules)

Good point but I do not have any "ducts" in or on my car. Also the cardboard was just used as a template (only good picture I had). The final design is 4 inches away from the IC. This means that the hood has a "vent". Rules say hoods are free. Also my hood is vented less than most after market bling bling ones. Thanks for the concern.

Answers for speedjunkie:

Do you have fans mounted to the back of your oil coolers? Yes one 10" fan.

Do you have any problems with oil drainage from the turbo to the pan? Not at all, and I am using the front drain also. I believe I use -10AN on that one.

Did you get that exhaust flange from Racing Beat? Yes

Did you use 304 or 321 for that runner? 321 SS from Burns stainless. everything is 321 up to the 4". The 4" exhaust is 409 and it starts at about the rear of the transmission.

Are you running water/coolant to those wastegates? Not at this time. This is one of my next season projects because I have over heated the rear diaphragm twice at a race limiting my boost to 15psi which = slow. Also I might have to relocate the WG since it is close to the DP.

I can't believe you were able to route the WG dump back into the exhaust too, that's awesome. It was not easy, also in SSM we cannot run open WG's. All exhaust must exit rearward of the rear axles.

What brand IC core is that? Did you do the same size piping on both ends of the IC? the IC is a cheap ebay core, I was experimenting and did not want to spend big bucks on a IC if it did not work. Also it is 2.5" in and out. I think I have pretty good response if not too much sometimes. Bell IC cores would be my first choice too.

Have you ever used a different IC and different exhaust manifold with that turbo? If so, is there a noticeable difference in response between this setup and that one? I have not had anything different, I plan to change something this year if I have time. I went from a stock set up to this so with that it was a BIG difference.

[josh18_2k]

Originally Posted by cturbo28

Good point but I do not have any "ducts" in or on my car. Also the cardboard was just used as a template (only good picture I had). The final design is 4 inches away from the IC. This means that the hood has a "vent". Rules say hoods are free. Also my hood is vented less than most after market bling bling ones. Thanks for the concern.

dont mean to call you out, this has been a confusing rule for me, and probably a pile of other people. They say no ducting after the radiator, but hood is free, so theres all kinds of room for interpretation there. isnt a fan shroud considered ducting? how far away from the rad/intercooler does the hood material have to be to not be considered ducting? i know you've been running with the big boys for a while, so maybe you've accumulated a clearer defination than i have.

[tomsn16]

Pics of the final hood vent. No issues with the big boys at Nationals this year that we know of.

[cturbo28]

Originally Posted by josh18_2k

dont mean to call you out, this has been a confusing rule for me, and probably a pile of other people. They say no ducting after the radiator, but hood is free, so theres all kinds of room for interpretation there. isnt a fan shroud considered ducting? how far away from the rad/intercooler does the hood material have to be to not be considered ducting? i know you've been running with the big boys for a while, so maybe you've accumulated a clearer defination than i have.

No problem, It is always good to get another opinion on the interpretation of the rules. They are confusing. I have not received a clearer definition but my competition has not had an issue with it. They even ask why I did not run the opening all the way up to the IC.....

[speedjunkie]

Originally Posted by cturbo28

Answers for speedjunkie:

Do you have fans mounted to the back of your oil coolers? Yes one 10" fan.

Do you have any problems with oil drainage from the turbo to the pan? Not at all, and I am using the front drain also. I believe I use -10AN on that one.

Did you get that exhaust flange from Racing Beat? Yes

Did you use 304 or 321 for that runner? 321 SS from Burns stainless. everything is 321 up to the 4". The 4" exhaust is 409 and it starts at about the rear of the transmission.

Are you running water/coolant to those wastegates? Not at this time. This is one of my next season projects because I have over heated the rear diaphragm twice at a race limiting my boost to 15psi which = slow. Also I might have to relocate the WG since it is close to the DP.

I can't believe you were able to route the WG dump back into the exhaust too, that's awesome. It was not easy, also in SSM we cannot run open WG's. All exhaust must exit rearward of the rear axles.

What brand IC core is that? Did you do the same size piping on both ends of the IC? the IC is a cheap ebay core, I was experimenting and did not want to spend big bucks on a IC if it did not work. Also it is 2.5" in and out. I think I have pretty good response if not too much sometimes. Bell IC cores would be my first choice too.

Have you ever used a different IC and different exhaust manifold with that turbo? If so, is there a noticeable difference in response between this setup and that one? I have not had anything different, I plan to change something this year if I have time. I went from a stock set up to this so with that it was a BIG difference.

Ok, I thought I might have seen evidence of that, but I thought maybe those things were just holding the screen on the back.

So glad to hear you don't have any issues with oil drainage. I'm kinda worried about the waste gate being heat soaked though, but I guess water cooling will help that. Have you thought about where you're going to get the water from and route it back to? Where are you thinking of relocating it to? Have you thought about making a heat shield for that WG?

Is there any concern welding the 321 to the 304? Mainly about cracking where the 321 meets the 304 flange? About the 4" though, is it not started at the back of the turbo? Or are you saying you started using 409 at the rear of the tranny and prior to that it's 321? That must have been pricy for all that 321 lol. So THAT'S why you plumbed them back into the exhaust. I wonder if there is some kind of quick disconnect for that piping to make it easier to connect.

Yeah I can understand using a cheap core for an experiment. Do you notice any drawbacks to that ebay core? I guess it's working for you if you're racing with it lol. I'm still wary of what size core to get, I'd rather experiment with a cheap core too but if it works I don't want to build another one with a name brand core. Although maybe it would still be worth it to try.

So as far as response, what would you say about how much difference there is between this and stock twins?

That fuel setup is crazy haha. I'd love to do something like that, I'm just not sure what all to do.

Thanks for the help!