ultimatejay

iTrader: (1)

New Derek did it again. Go the 12a!

http://www.grs-motorsports.com/video...29enero/21.wmv

Judge Ito

huge run for that 12A..

KNONFS

iTrader: (14)

They keep pushing the lil engine!

rotaryB-2000

7.42 on a 12A...

Using ..... Goopy Apex Seals!

http://grs-motorsports.com/fotos/man...29enero/48.jpghttp://www.grs-motorsports.com/video.../29enero/2.wmv

I can just imagine a 12A in the 6's

sen2two

iTrader: (10)

12a is still the number one choice for me as far as motors go.

ultimatejay

iTrader: (1)

I love the 12a too but good luck finding parts like good housings without paying an arm and a leg. I wonder how much it costs to machine 13b housings to 12a specs? Does anyone know? That would be a beast of a 12a motor using machined 13b rotor housings to 12a specs and using Cosmo irons with a custom intake manifold.I bet my left nut that's what these guys are using.

sen2two

iTrader: (10)

That's what I am working on right now. If you use 86+ plates, no need to machine the water jacket grooves either. Makes it much easier.

The reason I started working on this is because I have so many 13b housings that would be beautiful if I could mill off a little from each side to get rid of the flaking. I am building a Jig now to do this. Just finished up my PP jig

ultimatejay

iTrader: (1)

Yeah, all you would need to do is mill 5mm from each side of a 13b housing and use the irons you mentioned. PPort would be even easier because you don't have to mess with a custom intake manifold.

gready123456

i have some pairs of brand spanking new 12a rotor housings i bought ages ago for cheap (very cheap) heheh but i live in Trinidad and Tobago its an island in the Caribbean man i am seeing some ridiculous prices for those housings in the US something like 800+ us thats just very sad i really like my 12a's BTW nice carb Jay really nice work on the deuce

rex3

iTrader: (2)

Crazy how 12a parts so expensive. How about early 12a parts 74. Are they sought after? I have a 74 engine just sitting around.

Judge Ito

I heard through the grapevine Jim Mederer(Racing Beat) did a 12A with cosmo plates many years ago for a road race team..and yes I have connections to machined 13B housings to 12A specs.

ultimatejay

iTrader: (1)

Yeah you can sell those housings for big money and thanks for the kind words.

Ito, I bet that combo with one of your bridgeports would run like a stripped *** ape.

sen2two

iTrader: (10)

I don't believe milling them alone would put them withing tolerance. They would need to be milled down very close on a very well indexed mill, then placed on a surface grinder to complete the job. This will get you within .0001 instead of .001 with a very nice surface finish.

Judge Ito

I've had a set in my hand. funny to see the words 13B in a 12A width..

sen2two

iTrader: (10)

^Do you know the machining process they used? Wonder if it's different from how I am planning on doing it?


The way I am doing it will work very well, it's just very time consuming. I was also going to mill off the 13b and engrave something there.

ultimatejay

iTrader: (1)

You should be able to take it to a machine shop that resurfaces cylinder heads. It just has to be square and 70mm width. Should be a piece of cake for most shops.