FrEaK

alright gents, i have 81 GSL 12a , whats the best easiest cheapest way to get to around 250 hp, becasue thats right where i want to be. Input appreciated.

Max7

Best - Turbo
Easiest - 150 Shot of NOS

680RWHP12A

turbo

purple82

An old Camero.

lovintha7

Turbo....14 psi boost

and it's CamAro.

Directfreak

iTrader: (2)

Nitrous.

clean85owner

Supercharger.

Directfreak

iTrader: (2)

Show me a Supercharged 13B Making 250 to the wheels.

clean85owner

Everybody is scared of trying something new. Give me the money, and I will gladly show you a supercharged 13B putting 250 to the wheels.

I have very little doubt in my mind that a large streetported 13B with a 7" Camden supercharger running 8-9 pounds of boost and a boost prepped carb will hit that mark.

My motor, when new, made ~215 flywheel horsepower. That's N/A and only a mild streetport. Going by the rule of thumb that 1 PSi of forced induction boost is roughly 8 wheel horsepower (on a properly tuned motor); that would mean 9PSi would make ~72 wheel horsepower. Given 20% drivetrain lose, ~215 flywheel horsepower is ~172 wheel horsepower. 172 + 72 = 244, and if that is not close enough to 250whp; you can go with a large streetport and pretty easily hit the 250 whp mark.

Now, that is all on paper, which does not mean it would actually be truth. What we need is someone to step up and actually try it. I'd love to be the first to try it, but, alas, I am broke. DAVID GRIMES, however, is supposedly trying this setup. I don't know if he is going with a large streetport or not, but I am anticipating his results.

...Or, you can be a sheep and slap on a turbo...

seanrot

iTrader: (2)

All that is great, but um the guy that started the thread asked about the 12a

Time to restart the math

bbmac

I say turbo.I will be able to back up the nubers in the spring when my blow thru is finished(hopefully)

clean85owner

Yes, but DirectFreak asked about a 13B.

Paradox

iTrader: (1)

you can't beat a turbo for power, but with the amount of boost you're going to need to make 250hp it might get a little scary on the reliablity of the engine.

shm21284

Read the thread on building a 12a turbo... You're going to have a fun time building the engine to sutain 250 hp, no doubt, but its expensive and time consuming. It will be unreliable with just "strapping on a turbo" and ignoring these essential upgrades (all in this thread):

https://www.rx7club.com/1st-gen-archive-71/engine-how-build-high-output-12a-turbo-without-blowing-up-your-motor-380353/

You may also consider buying a 13b 4 port, street porting it, putting NA rotors in it, and putting Racing Beat intake manifold and exhaust headers with a carburetor (cheapest way, EFI if you wanna spend more money). Those make around 230.

Directfreak

iTrader: (2)

Eh..

YapaKanichi

shm21284 - that sounds like my setup. It's great man.

Freak - that setup I have or something similar to it will put you in your seat. It won't hold you there but it's fast. I hate driving the Honda when I have to it's the worst feeling I've ever had going from the Mazda to the Honda.

clean85owner

That is what I have, and, as said, made a claimed 215 flywheel horsepower. Surely, a slightly larger street port, and a really good carb, you can probably eek out 230hp, but not wheel horsepower.

Edit- YapaKanichi is correct. With this setup, it is quick enough to push you into the seat and do great burnouts/donuts, but it isn't "OH SNAP!" fast. Heh. It's great for daily driving, though. I think you'd be very happy with a similar set-up.

purple82

Geek check.

DAVID GRIMES

Gimme a few months