patsmx5

iTrader: (16)

Yeah, I'm glad I did now. The lag kinda sucks, but... It's worth the wait.

Took a few friends for rides and they're all in disbelief. And it's only 7 PSI. I'm gonna turn it up some soon, but dunno how much is safe. IE- how much power I'm making. I guess I"m around 230-240whp at 7 PSI right now. It's a lot stronger than the 100 shot ever was.

patsmx5

iTrader: (16)

That map by no means has a lot of advance. By no means whatsoever.

AbeFM

iTrader: (3)

Yeah - I was going to comment on that - 4k for f'ing 12 psi??! Heh. Needs work. There's no reason not to see at least 10 psi by 3k. You have a semi decent exhaust, right?

Then again, in second gear, RPM changes faster than boost builds. Do a 5th gear pull and tell me what you get.

Also, 11:1 is probably a bit more conservative than you need to be.

I wouldn't worry about 12 psi, that's fine. A bit more advance might help keep you out of it. Anyway, the motors will hold together pretty well. Pauls all stock internals motor is running 17 psi or something, for 310 whp, so I'm sure you're good at an untuned 12, don't even worry about dropping it. Work on spool up!

And congrats, it's tons of fun. As soon as you get over this automatic idea of yours...

AbeFM

iTrader: (3)

I wonder about that, I wonder a lot. I think people put "100 shot" on and think they get 100 hp out of it. I have my doubts. 240 whp on 7 psi is... probably a motor with a pretty good tune. I don't think you're there, not on 7 psi. I'm not saying it's not fast, just not as powerful as you think. 200 whp is a lot!

patsmx5

iTrader: (16)

Yeah, the boost was on by ~4400 in second gear from a 3K roll. Haven't done a 4th or 5th gear pull yet.

And yeah, I may tune it leaner, I dunno. Gonna see how it does and go from there.

FWIW I'm running a GT3271. Sorta just like a 2560, but journal bearing and a divided gasses .78 turbine.

And yeah, I need to get the MBC on there. That alone should help with spool.

Automatic is probably gonna happen unless a 6 speed falls in my lap for free or forged 5 speed gears become super affordable.

Well, I have a lot of headwork. I also ported the intake manfiold recently. 3" exhaust, straight through, no cat, 20x12x3 core IC with measured 1* increase in temps at 7 PSI vs no boost . Granted it's not tuned. But it's better than what most run.

And the 100 shot was 100 extra at the wheels, so even at stock power, 110, that's 210. This is more umph than the nitrous ever was. But I'm guessing as I have no dyno proof.

18psi

iTrader: (76)

do you have dyno sheets of the nitrous adding 100hp more? I think thats what abe was getting at. I dont think a 100shot adds exactly 100 but I may be horribly wrong

patsmx5

iTrader: (16)

Uh, that's how nitrous is rated. A "100 shot" is 100 hp. Now some kits advertise the shot as flywheel hp or wheel hp. Mine was actually a 106 shot at the wheels, or 127 flywheel HP. Something like that. So yeah, it was 100 to the wheels at 950 PSI bottle pressure.

AbeFM

iTrader: (3)

Don't think you can be horribly wrong there. And I assume there's a bit more tuning to be done to hit 100 hp with 100 hp in nitrous. Otherwise, why not just call 14 psi a "2x hp air shot"? Cause it doesn't work that way.

Of course, I could be horribly wrong. Dyno?

patsmx5

iTrader: (16)

For the most part, a XX shot is an XX hp increase. For a small shot like my 100 shot, it was 90-100 hp extra depending on my RPM. In the grand scheme of things, a nitrous setup is MUCH MUCH simpler than a turbo setup. Many less things that happen and many less variables. There are many many efficiencies and losses that must be accounted for with a turbo setup to predict HP/boost. With nitrous, you meter the exact amount of nitrous/fuel going in. It's a known you can accurately calculate. You spray in 500 HP worth of nitrous, it goes in. But if you can't expel the exhaust well, then some of the air/fuel that normally goes into the engine will not, and your total HP will not be what you think.

Cliffs: you bitches don't know **** 'bout nawz.

Toddcod

iTrader: (8)

Yea, I would call Corkey Bell about the psi you should push with that turbo!

Didn't Stephanie push 200hp at 6 psi with a similar Turbo.

Do you still have your NOS kit? You could shoot a small shot till you get to boost.


Keep in mind, stock miata's suck till 4000 rpms anyway. So it is just like driving stock, then the rocket kicks in.

In my opinion, if you are hitting full boost at 4000rpms, you are doing gooooood!

AbeFM

iTrader: (3)

So says the 1.6l driver. :-) Everyone with a 1.6 says that. The NB 1.8's with VIC and all that really do have a pretty wide curve. I got full boost at ~3800 rpm with factory exhaust, cats, and a piggyback. Now I run more boost, and in high gear can see 12 psi at 2700 rpm. So... 4400 is a bit high. Won't mean it can't be fast, but it'll feel a hell of a lot better to drive.

Certainly the times I've let supercharger guys drive my car, they all ask me if I want to buy a used supercharger. :-)



As to the NOS, yeah, I was thinking that you still have to fuel it. I guess what I was thinking is if you underfuel, you won't be able to burn it, and if you over fuel, you'll kill the efficiency of the fuel, so you go from 110 gasoline hp to 100 nitros plus 50 gasoline.

But like you said, I don't know anything about it.

NA6C-Guy

iTrader: (1)

Good job on getting it done and on the road. Seeing these stories here recently is breaking my heart, but keeping me motivated. Cant wait to actually have a little power on reserve, and to be able to pass people without having to go wot at 70mph.

Toddcod

iTrader: (8)

He has a GT3271.

I have a 2560 and I am full boost 13-14psi around 3200-3500, even in first gear take offs. After I am moving, it is almost instant whenever I hit it.

Pat, How does the exhaust Sound?

patsmx5

iTrader: (16)

Installing an MBC.

Exhaust is quieter with the turbo. And quieter than I thought it would be I'll add. Truely didn't think it would help this much. Haven't done much highway cruising, but so far, it's.... ok.

patsmx5

iTrader: (16)

So, I installed a MBC. Set it to what I thought would be maybe 1 pound more than wastegate and hit overboost at 180 kPa. (7 PSI waste gate) Then put overboost to 190 and still hit it. Put overboost to 200 kPa and I was running 190 kPa... at 14:1 AFR's! But no detonation. Finally got the touchy ****** adjusted. I'm running 174 kPa now, or 10.7 PSI boost with overboost set to 190 kPa. And I tuned it so now I"m running 11.5:1 in boost. Runs very well I must say. Seemless and strong. But laggy as hell!

Almost burned my car down too: So yeah, I just left the grocery store on my way home. About 2 miles from home, I think I smell a hint of gasoline. As I'm driving, I keep thinking I smell gas. Just barely. Get home, leave it running, pop the hood, and slowly raise it and look. Gas is POURING from the #1 injector onto the alternator! Scared shitless as I've seen gas fires before. I lower the hood, kill the engine, and grab a water hose. (pretty much useless, and we had no fire extinguishers whatsoever), and wait. And wait. I slowly raise the hood and I can see gasoline boiling off the intake manifold and alternator. I shut the hood and let it cool, watching with a water hose to try to fight it should it catch on fire. Thank god it didn't catch fire.

So for the umptenth time I just redid the fuel injector o-rings. Before, I was always having problems getting them to seal into the cylinder head, but never an actual fuel leak. Heh. It better not leak again.

Crank it up and check and no fuel leaks. So I take it around the block, and back home and check again. No leaks. Let it run and keep watching, all looks well. Whew.

So I go buy me a fire extinguisher. Got one from Wal-Mart for like 14 bucks. It's not big, but it's better than having nothing. Probably the best 14 bucks I ever spent on the car.

CLIFFS: Ebay special MBC's are touchy some bitches. RC fuel injectors don't like me. Everybody on the forum should carry a fire extinguisher for no more than they cost.

patsmx5

iTrader: (16)

Oh yeah, and first two kill stories.

First, I'm sitting at a red light when a V6 mustang with cool blue headlights pulls up behind me. I leave the light, I'm going about 25 in second and he changes lanes while flooring it to pass me. I roll on it in second. Bout the time he's right beside me this laggy thing spools and I proceed to put 5 car lengths between us rather quickly. He got back behind me.

Then on the way home from Wal-mart a newer stock red civic pulls up beside me at the red light. Turns green, I take off like normal. Few seconds later he guns it. I put it in second and put it to the floor. Momentarily I flew by him.

I love boost. Almost got to run a modded camaro but I was in the turn lane...

18psi

iTrader: (76)

any chance of video's pat? I am dying to see your car in action, especially some speedo/tach vids to see how this beast dropkicks you upon spoolup... oh and some pics of the finished up engine bay would be nice...

people with large turbo's are my hero's, its crazy and unpractical, but something about a gt3xx turbo that makes me drool.

what miata?

nice... its good to be boosted...... hey can u log full throttle run and post up the log file... i would like to see intake temps with ur set up and i just would like to see some other logs besides mine......

what size injetors u running?

patsmx5

iTrader: (16)

Yeah, I'll do some video's in a few days. Probably over the weekend. Still getting used to it and getting it tuned some. Actually, today was the first time I tuned anything. And I'll get some pics and writeups on different things in a few days once I get back to MSU and get settled in.


Running RC 550's.

Here's a log. Don't have any good long pulls to really judge its effectiveness. All of the boosted pulls on this log are 2nd or 3rd gear. I suppose at higher speeds and more load they may be higher, but then again, I'd have more airflow through the IC too.... So far I get 5-8 *F higher than ambient temps when cruising with a 2-4* F increase in temps during boost. Acceptable for me.

****, can't get it to attach either, I think it's too big. PM me your email and I'll send it to you that way.

what miata?

what are your outside temp where you are? and yea post up some vids intrested to see how it pulls......