So I need to figure out this Hemi thing for my pickup. One thing I'm stuck on is carburation. I will use 3 or 4 of something, no interest in single or dual 4bbl for this project. I've got literally a bushel basket of good rebuildable Rochester 2GC, but I think I only have like 2 buildable 97s. Buying three or four new ones is outta the question for me, the whole Hemi thing is a late addition, so the budget is only semi there to start with. My question is something along the lines of, how come no one ever uses Rochesters on a Hemi, or I have I just never seen it?? Is it a serious bit of sacrilige or what? In a perfect world, two more Stromberg cores would fall outta the tree beside my shop, but you know how that goes.
i don't think i've ever seen rochesters on a hemi before either. but maybe that's partially because there isn't a multi-carb intake made for a hemi that rochesters would bolt to? i don't know. BUT, that doesn't mean that something can't be made to accept rochesters.
Yeah, I shoulda been more clear...whatever I use, the manifold will be a U fab type deal, so that's no problem. But you could have the major answer there, every multi carb mani I've seen has 3 bolt carb flanges. So now maybe it becomes, is it goofy to put Rochesters on a Hemi?
no, in my opinion, it would not be goofy to put rochesters on a hemi. i am not a mopar guy , but i like hemis, and anything with multi carb setups on it. i think it would be cool. the motor won't know what carbs are on it.
Hello hillbillyhell, I quess that biggest reason why you have not seen Rochesters on a Hemi is that usually Hemi-intakes are for three-bolt carbs. Another reason might be that Mopar guys dont want GM-parts on Mopar engine? Third reason might be that small base Rochesters flow about 280 cfm and Strombergs 97's 150 cfm; important thing to notice on a multi-carb set-up.
The very few I've ever seen had "log-style" manifolds to accomodate the larger based Rochester carbs. Just two long cylindrical tubes with six flat base plates fabricated on top of each side! It made a rather unique looking home-made carb base with a "valley cover" between the logs. That was YEARS ago.
Lakeheaders.com makes all kinds of log manifolds.A 4 carb//2CG base bolt(small base) pattern is available from them. A 4 jug log manifold with 4 roch. on a 331 chrysler would work nicely. 4 carbs would roughly be 1120 cfm,...just like 2 600 4 barrel carbs. On a nice warmed over 331(cam,mild head work and stock bottom end....it would be trick.I do not think a progressive linkage would work(could be wrong here) What kind and size is your hemi? Don't try on a baby hemi.....too much cfm....those things choke on a 3x2 setup. If you have a big chrysler or Desoto....I beleive you would have no problem.
It's because hemi's were available with single and dual quad intakes early in their development,so why mess around with multi 2 bbls when you dont have to back then...
Hey, thanks for the reply Jeff! Does this mean you're not mad about the Canada thing?? I don't know yet if I'm gonna use the 270 or the 331. I was really planning on three carbs, I figured three on a 331 would work pretty well. If I use the 270, it's gonna be on the verge of overcarbed, like you said. On the 270, I think I'd try to scrounge another 97. Which motor I use will come down to wether the extended bellhousing on the 331 is gonna fit my current tunnel or not. The 270 of course adapts to my existing bellhousing. Again, thanks for the replys Jeff and everyone.
Here's a roadster we did. http://www.hispeedcustoms.com/IMAGES/CARS/32roadster/pages/28_tif.htm http://www.hispeedcustoms.com/IMAGES/CARS/32roadster/pages/24_tif.htm
HILLBILLYHELL..... Aww hell no..we were just having fun.....don't be crazy ha ha ha Hey Hi*Speed.....I saw your roadster at a GG show a coupla years back.....you should start a thread on them nifty spindle mount/Buell brakes ya got there. A very slick set up
Hemis are getting to be about like SBS's these days. Ha Ha Ha I am going back to SBC's after this. This HEMI game is way to expensive. I believe PAW makes a Tri Power Rochester plate that works with the same tunnel ram intake that I put my 8X2 plate on the punk. I would just keep the SBC in there if I were you, you have the whole truck built already anyway. Just finish what you have and build something else for the hemi.
Jeff - thanks a lot - they were a *****, but not nearly as much as clearing the mags (long story). It was all well worth it. I'll do a thread soon - I feel like I should post more anyway considering as much as I'm on here. The car is currently on display in the Petersen Museum along with many spectacular others.
Hi*Speed Your 32 is is *****'in ride... from front to back.....I am sure the crew would be very interested in a whole shakedown. Yea..Plowboy is right... Hemis are very $$$$.........
Here's another setup with 2GC, but like Plowboy said there ain't nothing wrong with keeping your SBC setup, It looked pretty good to me.
The Jalopy Journal
