cjernigan

Trying to decide what type of mani to build, a plain old log would be easy but would another style flow better enough to go through the trouble of building it. This is a for a 1.8 miata with wiseco pistons and pauter rods. Planning on running a T3/T4 turbo with external Tial WG that i have already. I want a near sideways turbo placement but a ram is out of the question cause I would have to eliminate my power steering for that. So lets say like 45-10* from being horizontal to the block. A lower turbo placement than top mount is also necessary for me to more easily fit a 3" downpipe. I've seen mani's like this and they all work fine, but would the long runner length help enough to matter?
I'll be using a standard T3 flange, not that crazy *** turbo flange that is on that log.
Engine bay can be seen here with current T25 HKS cast topmount setup w/ crazy ex-wg placement.
The plan is to mount the turbo forward and low enough that i can fit a 3" DP without too many crazy bends while being being to retain powersteering. I'll be doing a over the radiator type IC with 2.25-2.5" pipe (prob. 2.5). Should make for a nice setup with limited amounts of lag due to lacking flow and long twisty piping everywhere.

Of course some necessary ****.






My engine bay now.

LSD Motorsports

All **** must be placed directly in the body of your post. I will let you slide this time, your engine bay is definately not the friendliest, a short top mount would be most beneficial really. You want to keep the turbo as close to level as possible for good oil flow. There is always a balance between long and short runners, ideally youd like to match the lengths of all runners or have a multiple there of the cyl's that fire at different times. Longer equals better heat dissapation over more surface area. However, the longer the runners, the better chance you have of heat escaping, so if you go long, try and get a jet hot coating or a wrap.
Car looks great !

cjernigan

Sorry about the **** mishap. I made the post and realized attaching wasn't going to display it, so i decided to host the images for ease of viewing. It won't happen again
Edited the post with some more info and an engine bay pic.

I've clocked all the turbo's i've installed on the car thus far so oil draining shouldn't be to much of a problem, with miata's you drain to a tapped hole in the pan much like most cars. Turbo CHRA is currently clocked like 10 * in order for my T2 Oil drain adapter to clear one of the studs on the mani.

ososlohatch

somewhat local guy has a turbo'd miata . somewhere on 1320video.com i'm pretty sure he just bought a kit though, fly'n high miata kit or some bullshit, ran a 13.2 on 12 psi.. just thought id share

cjernigan

Yeah Flyin' Miata makes turbo kits for the Miata as well as Bell Engineering (author of Maximum Boost) I'm not going the kit route as everything I have now it HMT style already. Screw high kit prices, I want real power.

cjernigan

Nobody else have any thoughts on this?

ososlohatch

not really, just do it, id use a top mount for sure

Toysrme

I've got a statement, not so much a thought...
if all you're looking to amke is 350hp. It doesn't really make a flying ----'s differance. Tubular manis are going to be better, but you could make a measily 350hp on any reasonable manifold with a descent turbo.

ryan89crx

true

jsut go with what fits best and is easiest to make

crush

you made the mistake of posting ****... that took everyones mind off the subject at hand, and put their hands in their pants...