Thats a great article! Lots of insight! I still think that I am going to cast my own aluminum manifold after I set up my tilting furnace. But we shall see how that goes.
and there will be lots more to come, i have just dug up my late 50's early 60's copies of Customs Illustrated - Custom Craft - Custom Cars - Speed & Custom - Custom Rodder - Rodding & Re-styling - Car Speed & Style and Travis (clssy56) & myself are going to go through them & pull out some of the neat tech tricks that are in them. U'll have to give us some time BUT i think it'll be worth it, hell just looking through them i'm amazed at what they did back then.. &&& i wish i could get a subscription on ANY magazine at the prices they had bad then.... $2.50 to $3.50 for a full year damnnnnnnnnn thats cheap....joe
Cool article. One thing occurs to me though. I would think that the runners should be flush with the bottom of the intake box (plenum) as possible so as to improve flow and simply to drain off any excess fuel? Seems my uncle told me about a sheetmetal intake he made once and a float stuck and dumped fuel into the plenum, then when he fired it, the carb coughed and blew the top off the intake. Maybe my schizophrenic uncle told me a wild tale but sounds conceivable to me. On a second note, what's with all the "science" of flow and shaping of the runners for cast manifolds if a sheet metal deal works so good?! I'm betting the homemade job is not quite in the same league. However, big time Pro Stock racers use a sheetmetal intake, maybe it's a matter of street driven moderation vs. mucho gas drag racing application? WTH?! Anyway, be careful Gearheads.
Take ten minutes and cut a gasket shaped (without the intake ports cut out) piece of tin to bolt under each of the side flanges. That way you won't be dropping welding spatter down into your cylinders. JOE
[ QUOTE ] Cool article. One thing occurs to me though. I would think that the runners should be flush with the bottom of the intake box (plenum) as possible so as to improve flow and simply to drain off any excess fuel? Seems my uncle told me about a sheetmetal intake he made once and a float stuck and dumped fuel into the plenum, then when he fired it, the carb coughed and blew the top off the intake. Maybe my schizophrenic uncle told me a wild tale but sounds conceivable to me. On a second note, what's with all the "science" of flow and shaping of the runners for cast manifolds if a sheet metal deal works so good?! I'm betting the homemade job is not quite in the same league. However, big time Pro Stock racers use a sheetmetal intake, maybe it's a matter of street driven moderation vs. mucho gas drag racing application? WTH?! Anyway, be careful Gearheads. [/ QUOTE ] Modern sheetmetal intakes have a v shaped plenum instead of a box. I think having a V could help with streetability also due to the reduced plenum volume. Also, smaller runners would make it more streetable. Some creative hammer work could improve the looks too....rounding the corners and such. My 331 cad is gonna get tunnel rammed !!!!
The coolest part is there are no plazma cutters or CNC Bridgeport mills in sight. Just a little more grinding and fileing.
I think I would like to build one for my "Y"....maybe a dual duece intake instead of looking again for another triple setup, and since Im running a 272 for now. change is good, difference is better.!!!!
It looks like they totally ignored/eliminated any carb heat p***ages. This would make the engine slow to warm up. I guess this was an accepted cost of doing business?
Hey... Use'n a bit of old tech & new tech. We built a t-ram for the Poncho... Used two modified Q-Jets modified, run'n 4:10 gear get 13.4 MPG in a 31 coupe.. Idles fine, starts good.looks Ok as well Photo enclosed if all goes well Pontiac Slim
i think my IQ jumped a few points higher reading that. AWESOME post. now i wonder if anyone will post a picture of samiyam's sam-o-ram 1?
.......very cool post. In 1970, there was a young black kid that has a candy apple '55 Chevy with a built 6 banger in it. He was running a 4bbl carb on an intake manifold he had made from a section of driveshaft tubing. This thing was STOUT! Would pull the front wheels in second. He was also in the Doug Griffith Road Runner Club in Baltimore. Home Built American Ingenuity!! Viva La HAMB...........
Kinda makes you wanna cry....just think, now you could really freak people out and put FIVE deuces on something ....sorry, just talkin' outta my *** again...
I wish more folks did this kind of stuff... and $75.00 bucks was a bunch of money back in the day...when average wages were like what $100 - 200 bucks a week... another thought is to take your gasket to a cnc waterjet cutter or someone with a cnc lazer on even fust a pattern torch or cnc plasma and have them draw out the pattern and cut the plate for you... it saves a bunch of work on clean up...
Great article, thanks for posting it. I've always wanted to build a tube manifold more for show than anything else... Take for instance this design: Have a circular tube, about 10-12" in dia, and then from that have the 1 1/2ft long runners come down to the cylinders. Back on the circular tube, i'd have 4 or 5 motorcycle side draft carbs. So, basically all you'd see is a ring of carbs. I'd call it "The Ring of Fire"... Not sure how it would run... the trick would be to get it to run without flooding or having any flat-spots. Not a performance design, more for that fun "Munsters Coach" type of thing..
[ QUOTE ] GREAT idea to post.... I'll buy ya a BEER [/ QUOTE ] I'll hold ya to it the next time you come to or through St. Louis
Alot of motor cycle carbs do not have accelerator pumps. They don't need them because everything is so light,acceleration is instantaneous. Full size cars need accelerator pumps because they are much heavier. Just one more thing to consider.
I'll keep this up for a couple weeks.... Save it if you want. If you miss out email me or PM me and I'll email it to you. Since I haven't found a job, I had to close my Tri-5 site, as it was costing too much to have up... so I have really limited space now.
The Jalopy Journal
