rotaryPOWAH

Allrighty guys, here's the deal.

I just received a turbo that was listed as "stock rx7 turbo w/ manifold" (for a SCREAMING deal, nonetheless) which i am assuming means that it was pulled from a second gen with a turbo and 13B. Needless to say, i have a 1985 12a equiped gsl (as shown in the avatar). First off, the only reason i bought the turbo was because it was cheep (100 bucks with a claim that it works), so i figured why not, right?

So here i am, a 15 year old with a turbo, manifold, and a 12A, and i have absolutey no clue on how to install it. (damn kids, right? )

Now, i know the principle on how a turbo operates, and i have no issue putting some man hours into the car, i would consider myslef fairly machanically minded, however, due to the lack of tools and little experience, i'd say hand-fabricating any high tolerence parts would be out of the question, however, i have no idea on where to start.

Is there any complete write ups that i could understand and perhaps use to install this hunk of metal in my car? i have used the search feature of this thread, and perhaps i am a little slow when it comes to the internet because i didn't find a thing. Could you guys perhaps lead me in the right direction?

Thanks guys, i appreciate your time.

later
-Kyle

skir2222

First, what kind of car do you have? Is it fuel injected? When you add more air you are going to need to add more fuel, so what are you going to do about that? How much boost do you plan on pushing? What are you going to do for your intercooler setup? Search around for 12a turbo's so you can hopefully see what your getting into. This might not work out to how you think it will.

skir2222

Here you go.
https://www.rx7club.com/showthread.p...ight=12a+turbo

I don't think what you bought will be able to fit onto the car from looking at those pictures in that thread. Also you are going to need a downpipe, oil feed, and oil drain.

Here's some of the prices he paid stated in his thread...

So far.

Manifold $450.00
Carb , carb hat and intake manifold $650.00
Turbocharger $450.00
Intercooler Free - old turbo del sol project
Oil lines feed and drain with fittings $100.00
Racing beat oil filter pedestal $64.00
intercooler piping $150.00

total so far $1,864.00

Have not ordered a fuel pump or regulator yet I'm gonna order the mallory units from racing beat

And I'm doing all the work myself so that helps cut the cost alot
Not sure how much it cost to do a TII swap but I'm sure Ill be close to that . My goal was to do this cheaper than that.

I would say be prepared to spend over 2000$

kenn_chan

Kyle these two shortened sentences explains the whole thing.

but enough of me being unsociable and mean

down and dirty, the 13b rotor width is 10 millimeters wider than the 12a, which means that 2 rotors x 10 millimeters =20mm x .5 (each side is half off) and you come up with a 5 mm difference per bolt. so, easyest way is to get a 12a flange from racing beat, grind the bolt hole positions off of the 13b manifold and get a good welder to weld the cast steel 13bt manifold to to the mild steel 12a flange this then allows the turbine and manifold to bolt up.

next is to get an aftermarket 13bt down pipe for the 2nd gen you will need to cut the catalytic convertor mating flange off of the stock downpipe, and the 13bt downpipe, weld the 12a flange onto the 13bt downpipe, with a little fabbing you will now have the turbo pretty much mated up. yeah you need some pipeing from turbo to the inlet hat and same for oil feed, return as well as water feed and return but thats minor.

up until this point its been easy, and relatively cheap... nows when it gets hard and expensive ya see the physical mounting part is easy, its the extra fuel, and the spark control (that you do not have) that will destroy your motor repeatedly.

that being said due to a: the high compression of your engine, b: lack of control over the fuel and spark. c: lack of advanced fabricating abilities. you are probably better sitting back, taking your time, and slowly researching what all you need. while the stock 13bt turbine does a great job on the 12a motor you need to look at the fuel and spark side of the equation before you touch anything.

now Ihave mentioned fuel control (fuel system upgrades) and spark control (ECU options/upgrades) . use the search button research the above, and PM me when you have finished researching.

please do not be alarmed or angry if I send you back out to search for more specific items in the meantime i think you will find the following to be true after you research a little.... 4~5K dollars would be the cheapest you can get your car up and running

2.5k haltech + fuelsystem
1k misc fabricating
1 K a good tuner to dial it in
500 to fab up a front mount IC.

this does not cover the more important but oft overlooked items, such as Brakes your project will be very short lived if you cannot stop the first time you take off. radiator, and the million and one other things that are required.....

good luck

Kenn

rotaryPOWAH

Thanks a ton for the help guys.

I can honestly say i am a touch sticker shocked (from the price).
And yes, i understand that a carborated car will be much harder to configure with a turbo than say and EFI car, which, by now i am thinking this whole deal may be damn near impossible for me to configure, but i wasn't expecting much with only buying a 100 dollar turbo and manifold. I'll look more into it tomarrow and farther on into the future considering the fact that the car runs fine and a turbo-less car is better than a car-less turbo.
About the entire fuel thing i do figure that you would have to somehow richen the mixture only when ample boost is supplied, but then again i do not know too much on how to do that (or something simular to that). i currently have an intercooler off of a wrecked rx7 that is to the point where it is unfixable (either that or not worth it) so i do have a system of cooling the compressed air. getting it back into the engine (and the manifold alignment, as kenn chan said) would be the hard part. with all this to think about tonight im considering ghetto rigging a huge brushless motor into the car along with a crap ton of lithium polymere cells to just avoid all this forced induction stuff that is involved in internal combustion engines. But in all seriousness, i have not commited too much, so the pain of not having a turbo won't hurt as bad. I will have to look more into it.
right now i gotta go to sleep.

Thanks again guys.

marcus219

everyone, knows, your in, over your head, over your head....lol. that song is great.

just do your research and piece her together. budget builds are a must for a first timer like yourself. that way when you break and/or wreck it...your not out too much money