What size turbo is best for 1.6 ?
 

Hey guys I just bought my miata and want to put together a turbo kit myself. What size turbo works best with a 91 1.6 . Also which manifold would you use. I want to make at least 250 rwhp with not to much lag. Any suggestions on fuels systems would be great. Basically I want to do it right but also on my own. I just sold my 650rwhp viper in order to buy a larger boat and bought this miata for fun.

do some browsing around the t3 s60 has quite a folowing i am one of the few that runs a 16g, some of the guys with more cash run BB turbos but ohwell as far as fueling is concerend if yuo have money wich i assum you do get a link, haltechm emanage ultimate, tec3, hydra, or megasquirt if you are handy with a soldering iron there are those edgeing into 300 whp range with stock ecu and components but not to many. You dif is the weakest link on the 1.6 but an upgrade to a 1.8 dif is very simple. the tranny should handle 250 lbft or abit more depending on how you drive it. also the stock clutch is only good for about 140-150whp. hope this helps a i said before just take some time and peruse the site and all your questions will be answered. this will help as well https://www.miataturbo.net/forums/showthread.php?t=4288

thanks a lot for the info

t3 .48.60 :bigtu:

The T3S60 is the right turbo for the job. .48 A/R turbine housing.

Mark

Get the BEGi manifold with the T3. Plus Corky used my turbo and made a template for the DP to match as well. (Standard 3 bolt outlet pattern)

Absolutley.

what he said;)

Making 250rwhp from 1600cc of displacement is no walk in the park. I mean, you'll need a pretty good dallop of boost, and it might be considerably laggier than you expect, especially coming from a Viper.

That being said, a T28-sized turbo (e.g. the Garrett GT2560-ish size) will get you there just fine. With outstanding tuning and a strong engine, you might get there with 12psi. Otherwise, figure ~15psi.

There is not much in the way of difference lag wise between a GT2560R and a T3S60 with the .48 a/r turbine. Especially considering the compressors are quite similar. I was able to make 10 PSI at 2800 RPM on a 1.6 with the T3, not that it will do anything since its not making any appreciable HP, but I suppose you can make more boost possibly with the GT2560R at the same RPM... Still it won't make appreciable power until about 4000 RPM. Just the nature of that 1.6 motor.

I only made 235 RWHP at 12 PSI on the 1.6 with the T3. Now that crazy bastard Ric Stevens was making 325 RWHP at ~20 PSI with a GT32 of some sort. Bone stock motor. Of course, any turbo is going to feel laggy when compared to a 10 cylinder naturally aspirated motor with considerable displacement.

Mark

Yeah, if you're making 10psi by 2800 RPM with the T3 .48 or 2560 with 1600cc, I think you're doing pretty good. So, it must've had that 12psi by, what, 2900-3000 RPM? With what kind of manifold, downpipe, intercooler was that?

My target is only ~7.5psi, but I'm not at full boost until somewhere north of 3000 RPM, and my turbo's probably only good for ~360 cfm, so it's fairly small.

You're right that the 1.6L just doesn't seem to really wake up until it comes on cam at ~4000 RPM, although you can certainly feel the extra torque at as little as maybe ~2750 RPM.

man I dont hit 10-12psi untill 3.8k with my BEGi manifold and DP.

me neither by 2.8K i only have like 6-7 psi :(

:( is right.

12 psi by 3700 though. cant wait to see what the 460's do. i might have ot go to a safc to run em but it'll be worth it.

I think it had 12 PSI by 3200 or so.

Manifold... Made by me. Tubular, mild steel.
Downpipe... Made by me. 2.5"
Intercooler... Cut down Ford Powerstroke Intercooler with custom endtanks.

Engine Management: Haltech

Mark

PS - Stop running log manifolds and you'll build boost earlier. ;)

But i have "Directed Pulse" :gay:

actually it spools signifigantly better than with the log manifold and even bette ryet with a boost silenoid.

I have a tubular manifold...mad of STAINLESS, fool :bigtu: But the runners aren't perfectly equal-length ;)

2.5" downpipe and exhaust, built by me :)

LOL, well maybe you went too big on the runners. I was using fairly small runners to keep the port velocity up. I suspect that might be a difference. I believe (IIRC) I used 1.25" ID primaries in this application.

Mark

How does the "directed pulse" compare, do you have any hard numbers or is all seat of the pants. Good thing Corky thought of it. ;)

Mark