2G Need turbo help

[that2G98]

Does anyone have a good not too expensive FMU and Turbo manifold for a 420A motor they can point me towards. also i have a 14B turbo, what kind of wastegate do i need to buy for that?

 

[1990TSIAWDTALON]

The hot side will have the wastegate on it so wait until you get more of your parts for your build. You will need the exhaust housing so that should have a gate already on it.

 

[boostdawd]

If your planning on using the 14b then u can get an oem internal waste gate for cheap on the classifieds. What are your plans for the car?

 

[1990TSIAWDTALON]

Remember guys, he has a 420A. I am not familiar enough with turbo parts for that engine. If it has the same DSM flange as a 4G63 then the exhaust housing will work if not then he will need to browse the 420A section and see what those guys do when they put a turbo on.

 

[dsmcrzy]

Most of the manifolds on the market for the 420a are t3 flanged. So if he wants to use a mitsu turbo with the stock housing he will have to have a manifold custom made or alter one.

Unfortunately really all there is now are log manifolds which are a dime a dozen or spending a fair amount on a custom tubular manifold.

 

[ThunderChild]

Using a 14b on a 420a will require alot of effort and money, they dont have the same exhaust manifold bolt pattern. You'd be better off finding a t3 setup for a 420a, as you can go from t25 all the way to gt35 on a t3 footprint.

Here, lots of cheaper cast iron t3 manifolds.

Pick any t3 turbo that you like and a 38mm wastegate, would most likely have to make a custom o2housing/downpipe.

As far as FMU's, i have little to no knowledge on them, and my recommendation would be to swap in a return , type fuel system from a gst/gsx and use an AFPR.

@dsmcrzy could probabaly help you with more info.

Edit: he beat me to it

 

[that2G98]

If your planning on using the 14b then u can get an oem internal waste gate for cheap on the classifieds. What are your plans for the car?

My plans arent really to far for it at the moment, im looking to get it turboed for 8lbs just to start

 

[ThunderChild]

My plans arent really to far for it at the moment, im looking to get it turboed for 8lbs just to start

8 lbs on a t25 and 8 lbs on a gt35 are vastly different (just an example).

Having a goal/plan for the car is the first step, then a budget, then parts shopping. I highly recommend writing down your goals, parts wanted to obtain those, then start researching what parts will fit the bill. Picking up parts here-and-there can be done if you shop smart and are frugal.

Don't forget some kind of engine management solution. I cant recall if an SAFC will work on a 420a, but id recommend megasquirt anyway.

 

[dsmcrzy]

8 lbs on a t25 and 8 lbs on a gt35 are vastly different (just an example).

Having a goal/plan for the car is the first step, then a budget, then parts shopping. I highly recommend writing down your goals, parts wanted to obtain those, then start researching what parts will fit the bill. Picking up parts here-and-there can be done if you shop smart and are frugal.

Don't forget some kind of engine management solution. I cant recall if an SAFC will work on a 420a, but id recommend megasquirt anyway.

All of this. The engine management he was looking to use in his original post is an FMU. Which is sorta like a fuel pressure regulator. The most common to use for a 420a has a rising rate of 12 psi of fuel for 1 psi of boost. So basically you raise the fuel rail pressure so you don't have to change the pulse width of the injectors. Then you use a 'missing link' which basically fools the MAP sensor from reading positive pressure.

Not the most reliable setup. Since base fuel pressure is about 45 psi, at 8 lbs of boost you would be running around 140 psi at the fuel rail with a 12:1 fmu.

 

[dsmcrzy]

This is a pretty decent set of articles to go through if you want to stick with the 8psi of boost.

http://www.2gnt.com/index.php?d=Project_420a_Sleeper

http://www.dsmtuners.com/threads/how-to-build-a-420a-stage-2-turbo-kit-for-under-1000.181134/