I want 300 HP, opinions on my component list..
 

The car already has the built motor to handle enough boost to reach that goal no problem. It's currently running T-25 setup and that is all gonna go in order to reach the new goal. I don't want to talk about transmission's and rearends, i know more power can break them, worry about that when and if it comes.

Planned Components:
Manifold/3" DP and Exhaust/IC piping (Fab'd By Me, Over Rad IC Piping)
T3 Turbine platform. Want opinions on different turbos.
Megasquirt Fuel and Spark, wired in parallel with stock ECU.
550 cc injectors (Have from RX-7 cleaned, ready to go)
DO Alky Kit

I have read most everything, talked to people, and looked at compressor maps for different turbos. There are many turbos that are efficient enough to reach my goal of 300 HP and surpass it. What turbo(s) are going to be most efficient for this setup and why do you think so? Early spooling, or lower temps whatever reason you think one is better, fill me in with your experience or knowledge.
Will my stock fuel pump be enough with MS with 550s for 300 HP or will i need larger ones or a walbro, any thing like that.
Thanks guys.

If you are willing to drop a few clams on your turbo the GT3271 will get you there. If you are feeling cheap, then the same $200 cheap ass chinese turbo I run can take you there. Budget is going to be a primary driver.

Personally while 550's at 7000 RPM are capable of doing the job, you will be pushing them. Something larger would be nice, but raising the fuel pressure and using a walbro 255hp would address the injector issue.

So really, it's a matter of how much you want to spend on the turbo. The Precision SC-61 will make mad power, but does spool later.

Mark

Mark's Recipe works, so does Andy's, I would look at something along those lines.

Unless your thinking more?:bigtu:

Mark are you and Andy running the same turbo when it comes down to A/R ratios. I know he has the real thing and you have the ghettocharger but is everything else similar?
Think his is GT3271 .78a/r hotside -- .50 a/r coldside.
They spool soon enough for my liking, I'm not the type to like boost by 2000 RPM anyway IMO that's just unnecessary. I'll be building a log mani this spring for the turbo and a $200 ghettocharger could be easily squeezed into the budget for that in order to have it all together by May maybe.
You say it would be pushing it with the 550s at 7000 RPM, would 750's be more along the lines of ideal or something around that size. I'll stick with the 550s for now cause they're cleaned and paid for, but knowledge is a great thing.

Jefe, I'll stick with 300 for now with the idea of building a system that would be able to produce more power with a turbo swap and more fuel.

marks ghettocharger is a 57 trim garrett clone. Its not really comparable to the GT3271 but it seems that both turbos react about the same when it comes down to it. My turbo will spool a little sooner but wont make as much power after 7200 rpm since my compressor flows less than his. If I was you and I wanted a 300whp turbo that will hit full boost from 3500 to 4500 I would go with the GT3271....but thats just me;)

Thanks for the input.
What's the max PSI for the GT3271 or HP ceiling you think we'd see on our built motors?

24psi, 380whp

Good lord that would be glorious.
What are you shooting for? After the manifold, what's next?

Yer nuts :bigtu:

I am pretty sure Im gonna run an EMU and use 550's and up the pressure to get enough fuel to the engine. I wont run over 21psi, so my goal is to make 350whp @ 21psi on stock cams. After that Im thinking of trying out a set of 264' cams to get another 15whp revving out to 7500 or so.

I thought you were going hydra? Thought about MS?

I was gonna use a Hydra but I cant make up my mind.

AEM. so much better. wish I could run one easily in my 01.

I will concur with Andy, he has the better turbo in many respects for the application. My $200 turbo was an experiment, a rather decent result for the $$$$ spent, but I'd rather have the GT3271.

Andy's .78 A/R turbine outspools my .63 A/R turbine.

This may change a bit as the boost gets turned up. I, like Andy, am shooting for about 350 RWHP.

Mark

First to 350whp wins;)

Since I am waiting on castings, I think you are gonna win.

Mark

I dont think I can hit 350whp on a stock ecu setup w/ fmu.....thats REALLY pushing it;)

Come on, make it happen you're so close.

Why in the world would you choose EMU over the Hydra?

$$$$$

MS that shit!! $$$$ cheaper and much better than EMU.

The worst part about Andy's turbo and its' not a huge deal is the DP flange on it. Why did Garrett go with something that's totally different than the standard stuff that's already out there? Seems like a typical T3 5-bolt Ford flange would have worked fine with the split inlet and cast downpipe elbows are available off the shelf. Or even cooler the v-band on the GT3571 woulda been nice.

A competent welder can make a downpipe but finding one used will never happen.

Frank

That's what I was thinking. Could you not for less than the price of the EMU get into an MS system and have far more capability. Any reason not to MS?
I was wondering why you were on the wall about EMU vs. Hydra. The hydra is so damn expensive it's ridiculous.
A v-band downpipe would definitely be nice to have, if I can I'll go that route even though those damn Vbands are so much $$.

I honestly love to tinker with my car, but MS isnt for me I dont think. I need more reliability out of it. Not that MS isnt reliable, but lets face it....the hydra would be a little more polished:)

Boulder das andy dont give in we can strap a 255 aux on there for a daul feed and try for 160psi fp, and anything goes. i hope it just doesnt go :crx: that is embarasing :gay:

You can try that and let me know how well it works:eek4:

OK maybe later. somebody has to be the test monkey on stupid shit might as well be me

Well andyfloyd, there are people makig 1000hp+ with MS. I think it would do alright for a little miata. I'm not saying its better than a hydra, but it is definitely better than an EMU.

It may be better than an EMU, but I dont think I would have a problem making 350whp with an EMU either, and thats all I really want;)

True, but don't you think electronic boost control, water injection control and knock sensor retard would be nice? And it's still $200+ cheaper.

I would have thought a T3/T04E at somewhere between 15 and 18 psi would be enough for low 300s, no? The exact number would obviously depend on tuning. I have no idea really.

I dont know personally but I have heard the 48 trim stage 1 manifold goes up to 300whp and the stage 3 goes up to 350whp or so. I suspect this would have a much bigger limiting effect than the compressor size. If you want zero chance of running out of turbine you could always run a 63 trim like the honda guys.

stage 3 will go for WAY more than 350whp. You can make mid 400's w/ a stage 3 and a .48 turbine ( but the backpressure will kill topend ). You could use a stage 3 in a .63 turbine housing and make 550whp ( been done before on honda engines ).

Sure MS sounds nice, but like I said I dont want to constantly be tinkering with it which I know I would be doing. This doesnt mean that its not reliable, but I would rather spend a ton of money on a Link, or Hydra just to have a little extra reliability. I was thinking about doing the EMU because its pretty darn good for a piggyback and I could get 350whp out of it ( and like I said in the end thats all I want ). Whenever I run the 350whp map its gonna be on 110octane anyways so I wont worry about blowing things up:)

Go AEM ;)