Maybe it does for some but for myself that 2/10's difference is too small and can easily be compensated in different area's. Anywho I'm not here to argue or discredit anyone's opinion ;) .

And it can't make it up in others. This is wastegate on a 1.8L (~7psi) vs 12psi on a 1.6L

https://www.miataturbo.net/attachmen...ine=1320765847

The above are 300rwhp turbos, imagine a 450rwhp one.


Same story here:

http://www.boostedmiata.com/gallery2...ie_vs_vash.jpg

this time the 1.8L is running around 12psi and the 1.6L a lot more.

when you consider that a 57 trim will make peak torque around 5K or so on a 1.6L, it makes a big difference.

Guys, Im keen to build a street turbo setup for my 1991 1600cc Eunos Roadster. What exact spec of "Ebay" turbo is going to give me good spool up/response yet be able to make circa 200 BHP at the rear wheels???? Please can you reccomend specs or even better, postup a link to fleabay to highlight the right turbo?

I know budget turbos are not everyones cup of tea but this is a budget project for me having just finished my 650BHP R32 GT-R (the Mazda is my wifes fun car that I restored for her....now she wants more power thus the turbo).

Also....does anyone know the max boost you can run on a stock 1600cce engines before I need to goto forged internals (NOT BUDGET!!)

Thanks in advance peeps..............

Search Noob!

Any of the smaller t25s should get you there.

https://www.miataturbo.net/engine-performance-56/max-boost-stock-internals-1-6-a-61352/

What about a TD04 turbo off a Subaru imprezza WRX guys??

Lots of guys are running the td04s off of the mitsus so I don't see why not. Might wanna see if it has an odd flange though.

Cheers fella... A helpful reply!! As these are readily available for not a lot of cash I will go down this route I think. I've just got to find a manifold and downpipe and then I'm sorted!!

your a genus

yes subie OEM turbo is not a standard t2/3 whatever 4 bolt flange

Sigh nobody liked my borg warner turbo idea. almost as cheap as ebay. good quality. sigh

Running a TD04-13T off a WRX currently. Absolutely great turbo for the street, top end is weak for track use. BEGi created an adapter from when they built mine years ago and sell it on their site. Bonus is they are dirt cheap and have OEM reliability.

Karter, what psi are you boosting at and what bhp atw are you making?

Borg warner turbos rock...but they are not cheap!! Do any of u guys run holset diesel turbos? Their smallest unit spools up crazy fast and a lot of the 4 pot VW and audi guys see 500bhp with better response than the oem turbos !!! Check out HE221W turbo by holset!!!

Did someone just ask how much boost a motor can handle?! 10000PSI!!!!!

Dustin....thats some funny shit fella. Lets beat the noob up...appart from im only a noob to this foryum, already having fully build from a bare shell a Nissan R32 GT-R, currently running at 600BHP....all spec'd and built by me. Turbocharging my wifes 5 and thus joining this forum is a small project for me.

So please class me as well and truly De-Noobed......and please, no more wise guy answers to my questions eh???

If you wanna go fast, get a ride in a GT-R....mx-5's are just toys compared to the GT-R!!

Wow good for you! I've done a couple of motor swaps in gt-r's. A 89 and a 90. Also did single turbo conversions, full fab, cage, fuel cell, haltech. The whole nine yards. So the fact you have all this knowledge, and you ask how much boost a motor can handle is just retarded beyond belief. Because as you obviously know, 20 psi on a t25 turbo is different from 20psi on a gt40 turbo. But clearly you know that, and what you asked was just a lapse in judgement.

Funnyman, what I meant was what level of boost have people put through their stock internals before there is a need to go for a build. As you will know being a wise guy, all stock pistons and rods have a power level at which regardless of tune the comp ratio and power will cause them to break..... That is what I was trying to establish.... And in the UK and GTR world this is associated to the level of boost and bhp made by the mill. So....rather than taking the piss answer my question seriously if you can..... If not jog on and waste somebody else's time please ?

Ok seriously, is there just a language barrier here? The level of boost that your motor can handle is going to be based entirely on what turbo you are running. The stock internals have been known to break anywhere from 170 to 300HP. Most people run 200ish all day. Some people 250. As for how much BOOST is safe, see my previous post. Tell me what turbo and your supporting parts that go with it, and I'll tell you what boost your stock motor will probably handle.

How can that be the case mate....17 psi is 17 psi....regardless as to which turbo or turbo spec you have delivering the 17psi. If even with a good tune the stock internals give up the ghost at 17psi of boost then. For example, if you knew about RB26 engines if is a well known and well established fact that regardless of turbo, anything more than 1.2bar of boost = mashed internals.

I think we are going to have to draw a line under this one.....you are a long standing member of this forum and I respect that but at the same time, I have been a long standing member of most of the GTR forums for over 10 years now and like to think I am reasonably well thought of technically.

I would appreciate your Miata TB experiance though.....if we can quit the bitching?

I am going to build a fully forged engine for my wifes car but in the meantime I need to establish a basic setup that will allwo me to upgrade the turbo and injectors etc once the fully forged lump is ready.

So, I would like reccomedations with regards to exact turbo spec and manifold choice to allow the car to make a minimum of 200bhp at the wheels in a real street drivable form with enough ceiling to do the odd track day.

Can you help?

Cheers

Andy

You're missing a key component, and that is volume. Different sized turbos move different amounts of air, that's why they make different sized turbos. 15PSI on a T28 turbo is going to make about 250hp, 15PSI on a T25 sr20det nissan will make 200hp. The bigger turbo is pushing more air in, but it still the same pressure. If you want to make 200HP, get a t25 turbo.

wait... I thought your WEREN'T a noob.

:loser: :jerkit: :noob: