superior_force

good man

I love my Pettit ECU, and I get pretty tired of the PFC crowd whining about how much better their little $1200 toy is

Kento

I don't doubt that the coating's integrity is questionable, but I wonder if any small particles that did "flake off" would stop in the exhaust path. I'd figure they'd be big enough to be carried with the airflow right out the exhaust.

That's my main interest: how your car reacts when driven hard. Granted, your conditions and engine setup are different, but I'm wondering how your oil/coolant temps will be nonetheless. The improved fuel consumption is interesting, even if you did change your engine setup.

maxcooper

I don't mean that I thought I would find bits of it still hanging around in the turbo manifold, I meant that I didn't see any evidence of particles flowing through the manifold or hitting the turbine. I think you'd see little contact spots and perhaps some turbine erosion if the coating was flaking off.

-Max

HDP

iTrader: (2)

Wow, is the coating that hard that it would cause damage to the turbine if it flaked off? That coating sounds almost too risky to even attempt.

maxcooper

I don't think it really needs to be that hard to damage or at least leave a mark on the super-fast spinning turbine. Ever look at turbo compressors that have been in service a long time, perhaps with a less-than-fantastic air filter? There is often some kind of erosion from particles hitting the fast-spinning compressor wheel.

There is some risk, but it isn't that huge. I decided to risk it, even though I don't expect the benefits to be that large. Swain said they had done this for some race rotaries (NA, I am sure) over the years without incident. I suspect other turbo rotary folks have tried it, though I have never heard any reports good or bad. One of the rotary shops lists both the thermal coating for the face and some slippery stuff for the sides of the rotors. Swain lists thermal coat for the faces and some other stuff for the rotor gears. I'm not the first to try this. Forum member Batman tried it before I did and probably has more miles on his engine already.

-Max

HDP

iTrader: (2)

Yeah but you are referring to sand and road debris. At the correct velocity, it will completely destroy metal. I don't think I would risk something that could possibly flake off and could cause that much damage.

lopedl

iTrader: (1)

Congrats on your new project? Sounds like your dumping some serious ca$h into it.

adam c

iTrader: (2)

Hi Mahjik,

Looks like you started this thread when I was out of town. This is the first time I have seen it. I like what you have done so far

Last time we talked, you were going to port the intake, and leave the exhaust ports alone. Did you stay with that setup?

Mahjik

iTrader: (1)

Well, I wouldn't say "serious cash", but I am spending more money than a some people would spend.

Yep, it's not a large port on the intake, but just enough to add some more power. I didn't get any pictures of the side housings, but I suppose I can snap a few this weekend.

saxyman990

I personally feel that street porting only the intakes helps to smooth things out, but does not result in good horsepower gains. More power can be gained even with very small alternations to the exhaust. When I had my engine ported, I was concerned about loosing low-end power when porting the exhaust. But Steve Kan did my port work, and he did an amazing job. I noticed very minimal low-end loss, but a great deal more power in the upper rev ranges. I suggest that you talk to Steve and get his opinion. Just my $0.02

BTW - Looks great so far!

-Rob

Mahjik

iTrader: (1)

Thanks, but I did my fair share of research (with more than one builder) before deciding on what type of porting I was going with. I picked what suited my needs.

lopedl

iTrader: (1)

how much do you think you will be in it by the time its done?

Mahjik

iTrader: (1)

Right now, I'm at about $3300 for just the engine side of things (without the oil cooler, Knightsports headlight kit, roll bar and the other odds and ends).

This is without the rebuild kit added in and the gasket kit. I'll be replacing most if not all coolant/fuel/oil sensors as it goes back together (as well as reconditioning the fuel system).

So, there is still a ways to go.

I got nailed this year with taxes, so it will probably be next month before I can shell out any real money for the rest of the stuff.

RTS3GEN

Goddamn Taxes! I almost got nailed for an involuntary distribution on my old 401K. I rolled it into another 401k but I still got the distribution and had to claim the taxes, what a mess!
Art

rynberg

I just realized that I hadn't posted in this thread....good luck with your rebuild project, Mahjik. We're going slightly different directions with our rebuilds but both of us are trying to do things RIGHT. Hope everything works out for you.

Mahjik

iTrader: (1)

I hear ya. We got slapped for a little over the $10k mark. What sucks is we are getting limited on the Schedule A and everywhere else so we only have 2 options:

1. Buy a bigger house (ain't happening)
2. Withhold extra off the paychecks (and extra $500 per check!)

This sucks...

Thanks Rynberg. I was actually quite content with my old performance. If my current path only gave me the same performance but better reliability (and a prettier engine bay), I'd still be happy with the result. I think I should have a little extra performance with this setup overall than before. In the end, I'm sure I'll be happy with it as at least it will be done *my* way (no one else to blame but me).

Mahjik

iTrader: (1)

A few more parts arrived:





Upper intake manifold and throttle body...



T-Stat housing...



Crossover pipe...

Larz

WHere are you getting the baffled oil pan from? A-spec's seems a little pricey to me. Or are you custom fabbing it?

Mahjik

iTrader: (1)

I wasn't aware A-Spec was selling a baffle for the oil pan. I know they have their own stronger aftermarket oil pan.

I was planning on fabbing it, but was helped out greatly by a forum member so that part is taken care of...

I do plan on using the Gotham Racing Oil Pan brace.

rynberg

Nice shiny parts.

SERIES7

Hey Max, how long have you had your fd out of the shop?

DFW RX-7 Cook

iTrader: (1)

Well I know that you should get a least 5 more RWHP from my polishing process. I can't devulge super secret HP gain numbers from the coating process. It's secret, But I can assure you that its way more than a Vinyl Decal! LOL!
I hope that you enjoy the parts and I appreciate the mention in the tread. Free advertising has never hurt.

M104-AMG

iTrader: (8)

All this talk of "carbon build-up" has me worried.

I have M2 Stage III ECU, and these are my mods:

1) Greddy/Trust catback exhaust
2) Down-pipe
2) Efini Y-pipe
3) '99 spec air housing

Should I stick with my stock ECU ?

Will the M2 Stage III be too rich ?

Is the only way to be sure is to dyno it with a wide-band O2-sensor ?

BTW: I'm planning to install a free-flow metallic catalytic converter.

Most of all, good luck. I'd like to do the same to my blown motor . . .

TIA,
:-) neil

IamRobbyah

Mahjik:

I always love to see custom build ups. My motor just went (still need to get a compression test). I would love to be able to do a complete overhaul like yours, but broke college student + poor wages = one very sad fd driver. Once I get the comp. checked, I'll be able to start my build-up. Hopefully the guy I bought the car from, might be able to lend a hand. So far I have ~ 2,000 saved up. I just can't wait to get started.

Your doing a great job so far, keep up the good work. I look forward to watch your progress in the future.

F0RSAKEN

Awsome work so far man, hope everything goes smoothly 'till its all buttoned back up. And ouch about the taxes damn man, its nice being poor, I dont make enough for them to take money from me, so I still get almost half of them back, 1.5k (helps being in college )