Mach1

I have been driving/racing a LS1 FD RX7 for about a year now, just picked up a 92 Miata, stock 1.6, old style FM turbo kit with GT2560. The old style kit has the messy IC pipe routing, the turbine outlet is welded steel, not cast, ECU is MSPNP. I got it tuned and running well on the street, I am trying to figure out what I need to do to prepare for a track day, I hear all of these horror stories about turbo miatas at the track, I am just trying to keep my bases covered, Inconel studs are a good place to start, what other reliability issues do I need to worry about? As far as tuning goes, rich=high egts from what I understand, should I target ~11.5:1 to keep my egt's in check? Any other input would be great. Thanks in advance!

JasonC SBB

Cooling system, oil cooling, heat shielding.

Mach1

Already have a nice radiator and a 12x12x1 oil cooler. Any examples of the heat shielding? How hot do these cars run when being driven hard, my LS1 would run all the way to 235 but they run on the high side.

flier129

iTrader: (7)

Look into coolant reroute if your concerned about cooling issues.

Which in my opinion, any heavily tracked turbo miata should have the coolant reroute. Not necessary, just a nice pre-caution.

BTW, specs on ls1 rx7?!

mgeoffriau

iTrader: (7)

Yeah, pics of FD prease.

Mach1

thirdgen

iTrader: (26)

I used to use the similar kit, if you're talking about the intercooler piping that uses a top exit compressor orientation, then cuts in front of the pulleys and into the top of the intercooler tank.
I clocked my compressor housing so it became a bottom exit. Then I cut the piping and made it go from the compressor, directly to the I/C. It eliminated that big mess of piping, and really cleaned things up.

Mach1

94, TSP 5.3 Stg 2.5 heads, MS3 cam, Stg 3 T56.

Mach1

Yep that's what I am talking about, after you reclock how did you mount the wastegate since the mounting points are on the wrong side, it looks like FM's updated kit had a diff bracket welded to the WG so it mounts on the back of the compressor housing instead of the front.

rharris19

iTrader: (41)

nevermind

BenR

iTrader: (2)

Too much timing retard also increases egt.

My sawzall vented hood made a huge difference in water and under hood temps.

Inconel and v bands are proving to be good solutions. For me, I went 3/8" A286 bolts, safetywire, nords and high temp threadlock along with this bracket on the wastegate all in one shot. Seems to be secure so far.

http://i70.photobucket.com/albums/i107/1Il/IMGP0868.jpg



On the RX7 did you ever replace the pillowballs on the rear control arms? Do you happen to know a source for them?

Mach1

No I didn't but the best price I found thats not mazdaspeed was tasca auto parts.
http://www.tascaparts.com

thirdgen

iTrader: (26)

It's actually better that it mounts to the back of the compressor housing. I would take the actuator off, then remove the snap ring and turn your compressor. Fit the piping up from the intercooler to the compressor. Mine was a tight fit at my radiator hose, but it worked. Try to weld all the piping together and have as little couplings as possible. I used 1 coupling at the I/C and the other at the compressor flange. After everything looks like it fits nicely, put your actuator up against the compressor like it was before. Use the wastegate actuator as a template and mark 2 holes, then pull the compressor off. Look at the other side where the original bolt holes were and take note how deep they go. Now drill 2 more holes where you marked for the actuator, and tap them out to the correct thread pitch. Then put the compressor back on, put the snap ring in, put the actuator on, then the I/C piping and clamps and you're done.
If I remember right, I think this eliminated about 3' of the original plumbing.

TurboTim

iTrader: (9)

oh WTF man. wow.

flier129

iTrader: (7)

What turned you away from tracking the v8 FD? Expenses?

Quite a few members here nut all over themselves when they hear the letters LS and FD together......














including myself, brb changing pants.

Mach1

I love the car but it's just too nice to be tracking, I don't want to hack it all up. Since I got the bug I wanted to find something else to track, never really had much time with a turbo car so I figured a turbo miata would be fun, and it has been so far, plus it's cheap

flier129

iTrader: (7)

Im back with new pants.


I figured that was the case. Put your location in your profile so we know where to go to stalk you :-D

Mach1

Done

Machismo

iTrader: (1)

Hello neighbor... Have I seen this car at Pennington Field?

Mach1

Howdy, never had it at Pennington, just TMS and Mineral Wells. I usually run with Texas Time Trials and the BMW CCA. I don't get enough out of ER at this point in my "racing career"