Defprun

Who here, on this board, has the highest hp from a N/A 12a or 13b (carburated) for that matter. I'm interested in knowing, because I plan on getting the most out of the engine, and would like to know what I could do without going overboard on porting. I'm more interested in knowing the output of the 12a, but i wont discriminate if someone has a rather powerful 13b.
If you just know someone with a powerful 12a, please post that as well. Thank you

Fennix_sr

i know somone that has one with 270+hp 13B carbed... well hes picking it up prety soon if all goes well for him.

purple82

I've seen dyno sheets of a race car with 260hp with a fuel injected, heavily ported 13b. The torque and hp were very peaky and not very streetable.

Defprun

Yeah, that's what I'm talking about!!!! But those monsters are probably Peripheral or Bridge ports Any that are just running a streetport??? Peeky hp rocks!!!

Wankelguy

My friend was getting 285 hp out of a bridge-ported OLD STYLE (dual distributor) 12A using a downdraft Weber. Sorry, I don't remember if it was a 48mm or 51mm. The motor was in a 165 mph RX3 that was raced in GT3 class.

MikeLMR

I think Crispeed has worked on a 12a street port with twin webbers thats putting out about 260hp !

it was in a thread a few pages down from this one

Fennix_sr

the car im talkin about has a holly 650 ... RB headers straight pipe to a super trap... heavily SP i am prety sure racing trans i dont remember who made it... it was origionaly a circle track race but was takin out of the races and had it slightly moded for the road ( suspension n ****) its running about 267 HP i think 13B but the guy had it carbed. thing sounds freakin amazing it burries the rpm tach i believe it revs to around 13k rpm ...without destroying the engine. obviously it has a lightened fly, and all those goodies.

specRX7_22

theres someone on this board with the user name '680rwhp12a'. i assumed it was a joke?

Narcisse91

He claims its true, and has posted dyno charts, but I guess noone believes him. I don't know why, as I haven't been around this forum long enough to get a feel for different members.

If you go to:
http://www.mazdacomp.com/customerscars.html
they list cars running 10s, 11s that are NA (although only in a couple cases do they specify NO2 use). That's a lot more than 275hp, but they're drag cars, and probably not what this guy is looking for.

1st7heaven

I know your wanting 12a stuff but I was at RX7.com while they were dinoing a 13b, p.p, fuel injected, with Jacobs ign(non turbo, no nos)............298hp at the rear wheels!!! Whats that make at the motor............320?????

Redwood

I'll need a dyno before I buy into this (or at least some other confirmations).
I don't think he's joking. If it really is a joke, he's taking it quite far Check out some of the threads he talks about his car in and see what it has done. Pretty extensive.

specRX7_22

and he claims 680 RW hp, meaning the engines making 7 hundred something. thats really hard to believe, but if its true thats insane.