what turbo?

Dan Dillinger · October 30, 2011, 04:24:50 PM

Looking for a single turbo for my 13b MX5 swap.

I\'m running a 13b engine from a import FC RX7 (s4 engine?)

Hoping to get a T4 turbo manifold for it from a s5 engine and find a turbo to fit this.

The turbo must be relatively small but be able to produce 350 ish bhp?

Space is a big issue for me!

Any help at all?

I also want the turbo to be able to spool up quick, not really up for mega turbo lag!

i\'ll be running an apexi power FC for management

Cheers

Dan

m1tch · October 30, 2011, 04:53:34 PM

The S5 engine has the same turbo manifold, its not a T4, the turbo is large for piston standards, but quite small for rotary standard, most is about 300bhp at 0.9bar, Spooling isn\'t an issue on a rotary, its got loads of exhaust gasses so can spool \'large\' turbos with ease, most upgraded turbos are T04s, should give you the power you want.

I have a T4 manifold for an FC btw

This is an OEM turbo:

Size comparison - T88 (currently for sale) on the left, OEM in the middle, OEM T25 turbo (this is from a 300zx)

here is Speedline import\'s MX7 build:

http://www.mazdarotaryclub.com/forums/showthread.php?t=60704

Here is my spare T4 manifold:

Dan Dillinger · October 30, 2011, 06:23:04 PM

ahh, sorry i\'m still learning!

I was hoping to use the standard manifold?

What turbo would you suggest? I want to keep the turbo position stock , not like the mx7 build.

m1tch · October 30, 2011, 06:56:19 PM

You could build a hybrid turbo using the OEM hot side and bolting on a larger compressor housing - give Prof a PM about that, hes making good power

L18M · October 30, 2011, 06:57:48 PM

Hi, im running a t04e (not sure which trim) but got 374bhp on ported engine running 1bar with more to give.
.89 hot side i believe or was it .91 sth like that (is small). boost early and had more puff to give even at 6 /7 k rpm.

judging by ur power wants i\'d say go similar spec.
hth

Dan Dillinger · October 30, 2011, 08:13:14 PM

Will the t04e turbo bolt onto the standard manifold yeh?

Liam, your turbo sounds ideal!

I\'ll keep an eye out for one

m1tch · October 30, 2011, 08:21:18 PM

Quote from: Dan Dillinger;796686Will the t04e turbo bolt onto the standard manifold yeh?

Liam, your turbo sounds ideal!

I\'ll keep an eye out for one

No, it won\'t bolt up to an OEM manifold, its a different stud pattern! You need a T4 manifold to run a T4 turbo!

L18M · October 30, 2011, 08:31:57 PM

as above. i have a xs power one somewhere with my mechanic i dont need.
its moves the tub forward a little though.

Dan Dillinger · October 30, 2011, 08:56:02 PM

Sorry, complete newbie here!

I think i\'ll go for the T04E turbo and have a custom manifold made, I doubt an aftermarket manifold will fit, space is really tight.

Thanks guys.

m1tch · October 30, 2011, 08:58:21 PM

They fit fine even if the turbo is forward a bit:

http://www.youtube.com/watch?v=g-6sJg4xpWw&feature=related

Dan Dillinger · October 30, 2011, 10:29:56 PM

yeh, I want space up front for a v mount set-up tho