hey guys I have decided to turbo the 12a I have in my vw baja. I have a pretty healthy "nissan motors" turbo from a 1985 300zx 3.0 liter. now the exhaust merges on the drivers side so all 6 cylinders push the turbo. I was wondering if this would be a good start on my project. it can push the 3.0 to 300hp no problem, but will it be enough for my 12a? or to much? I can do the fabrication part for the header easily. I don't care if it lags some I just don't want it to run outta breath. I am shooting for 250 hp. would a external wastegate be the way to go also? my engine only has 3000 miles on it since the rebuild.

I also have access to a mustang dyno, so tuning will be mandatory once setup. I found a friend with a cheap wideband for sale also so it will be instllaed also.

 

Seems like it will be a pretty good beginner starter, but unless someone know's the A/R's of the turbo, then it's hard to say. 250 hp is achievable with a turbo, but make sure you pump enough fuel in, or it'll pop quick.

On the wastegate, you'll have to look at the turbo and see if it's already got an internal wastegate. Most factory turbos do, but check to make sure. If it doesn't, then you're going to have to go external wastegate. 40mm should suffice rather well.

 

it has a internal wastegate set up at 5-6 lbs, so I will keep it at that level for now. I will try and get the A/R's for the turbo and post em here. I will probably make a external wastegate pipe centered between the two exhaust ports and just cap it for now. I am just using a flang, two pieces of thick stainless pipe made into a "V" shpae and exit into the turbo. It will be about a foot long.

just trying to get an idea if this is a good start for a turbo.

 

here is a link to some maps. on the one page it says the turbo is good for smalldisplacement engines with lower boost levels. mine is not a garrett, it is the nissan (hitachi???)turbo.

http://www.mygen.com/users/dbruce/my...sor%20Maps.htm

 

it's gonna choke the motor up top, but i wouldn't really worry about it. give it a shot. if you don't like it then grab another turbo

 

i think that turbo should be okay for your output goals. as FBII stated, it will probably be a bottleneck when you want more power though.

 

cool guys thanks. I will be running a 45dcoe. I have the wrap around intake finally.

 

here is a couple pics of the intake and old exhaust.

I got my homemade boost referenced FPR made.

the turbo flang is going to come off and be about 6 inches from the engine flang. both pipes joining together to make a "V" looking manifold.

1; will 2" stainless be ok for making the turbo manifold??

2; will the turbo be to close to the engine? there is alot of air blowing by being it is out and exposed not like under the hood.

 

oops heres the pics

 

i feel gypped! there aint a single picture of a turbo in dis thread!

air blowing across the turbo is a good thing, those snails get REALLLY hot... cooling will improve the longevity (though not by much if youre just blowing air on top of it.. but every bit helps), and it will help keep heat away from the engine.

here's something crazy: take a smaaaaalll oil cooler from an auto transmission and place it in series with the turbo's oil supply, in the vehicles airstream. on the feed side it will help cool your turbo bearings with cool oil, on the drain side it will help keep oil temps down improving engine soft seal longevity and preventing oil breakdown. thoughts?

 

sorry about no pics man, heres one.


Hey I just got a thunderbird turbo off the 2.3 engine. Looks to be in great shape. The compressor side reads 60ar. The exhaust side doesn't have the ar. It looks to have the t4 flang I belive?? spins good and fins look great. I am not sure if it was auto or stick, great price though $20.

Would this be better flow wise from the garrett t3 from the nissan?

This is a major on the buget turbo project. I mean homemade **** budget.
Vw bug buget even, the worse kind.

 

the one on the left is the nissan turbo

 

How dud you make your own boost reference FPR?!?! That sounds cool, let me in...

 

I will show a pic of it, you need a check valve also to make it work. the vw guys swear by it.

will the 2.3 turbo be enough for a 12a though? It is a stock port 12a.

 

bump cause I need to know if the 2.3 turbo will work ok for the 12a. thanks guys

 

hey what kind of intake/carb setup you got going on there?

 

it's not a T4. still a T3.

here is the compressor map for it http://www.turbocharged.com/catalog/compmaps/fig4.html

gonna be the same deal as the nissan.


stock w/ alot of work. hahaha

 

^^yeah alot,lol

cool, thanks man. It uses a different bolt pattern for the hot inlet so now I gotta fab up another flang. The good thing is the stock nissan turbo can go back on.

 

exhaust manifold finished for now.

I might drill a hole and run a external wg later. Its some tight fittin **** but hopefully well worth it.


thats my $200 burn box welding there. I cleaned it enough to use.

 

that bmx bike in the back is old school...what is that

 

^^^you get a brownie for noticing the old skyway ta. the best bike ever made.

 

did you leak test those welds? also, the flange that bolts up to the engine looks a bit on the thin side.... other than that tho, it should work great. looks identical to the manifold i made for an s4 turbo a long time ago

 

hey FB here is the wastegate ported out. I cannot get it much bigger due to the flapper it uses. I will make the flapper door tommorow, I got too drunk last night and any loud noises are not gonna be cool today. I had to hold onto the ground just so I wouldn't fall off the earth last night,lol.

 

aahahhaa, that looks pretty good. when you sober up just throw that door on there and you should be fine.

 

You like the 1/4 not-so-mega-pixle cheapo camera pic.