cpt_gloval

iTrader: (1)

i'm performing initial research on a series 4 13b swap for my 83 GSL. right now i'm leaning towards a carb setup, and gsl-se tranny.

i understand that i'll need a 12a front cover for the OMP mounting, and a GSL-SE motor mount.

will i be able to adapt the 12a ignition system to the 13b motor (as in, i don't want to use the ecu if i don't have to)??

Directfreak

iTrader: (2)

You're not going Turbo, so just use your 12A Tranny. Very little difference between it and an SE one. No ral strength difference either (just gearing)

Yep. Or a GSL-SE Front cover would work as well

Yep, just use your 12A Dizzy.

cpt_gloval

iTrader: (1)

really? i was under the impression that the stock 12a tranny was a bit underbuilt... my goal for this swap is about 160hp.

also, if a 12a tranny will indeed be up to the task, would it bolt directly up to the 13b motor??

Directfreak

iTrader: (2)

160HP? No Problem. That's what a stock port 12A has. - JUST KIDDING! Seriously, many people have about 200HP with Street/bridge port 12A's, and the stock tranny holds up fine. It's the "Intant-on" high torque of Turbos that usually make 'em break.

Bolt up with no problem. Just have use the 12A Flywheel and pressure plate for a 12A, and 13B ones for the 13B. (Actually, even a 12A cluctch would work on a 13B)

diabolical1

iTrader: (3)

yeah ... the swap is pretty straightforward

you don't absolutely NEED an SE front cover, but if you can get one, then do it because the the 13B uses 4 oil metering lines, whereas the 12A provides just two - it's just something to consider, but it's not that big of a deal to remedy.

a lot of the intakes out there for the 6-port engines seem to use the lower stock manifold (Holley is the only one that I know of that does not, but there may be something that I don't know about) ... so in terms of intake you're a little more limited than if you ran a 4-port engine, but you do have choices ...

other than that, i can't think of any problems that i had.

cpt_gloval

iTrader: (1)

as far as activating the 5th and 6th ports, have there been any solutions not involving the airpump (which is how they're activated, as far as i know). i plan on not installing one.

diabolical1

iTrader: (3)

if, i'm not mistaken, i believe it was feedback from the exhaust that activated the 5th and 6th ports.

at any rate, i just took the sleeves out of them and leave them open all the time. i experimented with them once, by closing them for a while, but i honestly did not notice much of a difference.

82streetracer

iTrader: (1)

i am doing a similar swap, if I premix, can I just use my existing 12a frint cover?

diabolical1

iTrader: (3)

yeah ... i don't see why not, then you can just plug two of the lines and be good to go.

cpt_gloval

iTrader: (1)

would that provide enough oil to keep the engine sufficiently lubed?

Directfreak

iTrader: (2)

When you pre-mix, you have to set the ratio for high-RPM operation. The other 99% of the time, you will be running way too much oil in you gas. This will make the car feel less powerful, foul your plugs much faster, and give a nice brown oily stain/smoke coming out of your muffler onto your rear spoiler.

I like pre-mixing for ease of mind, but on a daily driven street car, keep the OMP. On my Turbo conversion I will still use the OMP (at max setting) and still run a little two-stroke in the gas. But I am just paranoid.

cpt_gloval

iTrader: (1)

also, to ask a dumb question:

what kinda power can i expect to get out of a s4 motor, decent carb setup, and a racing beat exhaust?

Directfreak

iTrader: (2)

About the same as a GSL-SE 6 port motor. Once you go carb, they are pretty much the same.

Oh, and the answer is about 180 HP on a stock port give or take a few.