OHV six carb / intake questions
studeb...@gmail.com
some guys aren't over there and still only on thr NG.
Okay, I've been running my custom 62 OHV six that has a 185 crank in
it and bored to practical maximum. I'm at a nominal 200 cubic inches.
I'm NOT at all satified with the stock carburator setup. I had the
carburator professionally rebuilt but still not happy. I've personally
had the carb apart several times and have not made any substantial
improvement. The carb works but just seems really crude. At times it
will load up and other times pop due to being too lean. Sometimes I
get really good performance out of it and other times downright really
poor. Not to mention I'm getting a poor 14mpg (and with a 3.31 rear
axle!).
Does anyone know of some modern replacement carb that will work on the
OHV sixes? I know theres several replacement carbs for the V8's but
anybody know of anything that will work on the six?
Also, anybody ever know of an aftermarket duel-carb setup for an OHV
six? I've heard rumors of that some exist but I've never confirmed
that. Anybody have one they will part with?
thanks!
Mike
are attempting to build up a hot rod type combination, cruser/freeway
gears are not going to help. 3.5's minimum and 3.70 would work better
when all of your engine hassles are figured out. But do this
first... You will tune it to run with the high gears and then have to
retune it all over again to work with the lower gears.
As for carburetors...can't help there except to say "experiment"! Hit
up you local wreaking yard AFTER you get the twin carb. manifold and
just grab a few carbs. with the same base plate pattern and stsrt
playing with them.
One other thing to try...hit up the rest of the gang over at the Stude
Racing site. Not sure if any have done this particular engine
combination but many have done some strange things....!
http://racingstudebakers.com/stl-web/bulletin/bb/index.php
Have fun with your experimenting..
Mike
scottl...@gmail.com
I haven't put one on my OHV 6 yet, but these carbs look good:
http://www.quadratec.com/products/product_search.php?cn=Carburetor&c=64
They're expensive though. Another alternative is the 2 barrel Weber
out of a Pinto.
This is a good site for stovebolt Chevy 6's. Check out the 2 barrel
carbs under Fuel and Induction. They have adapters too:
http://www.stoveboltengineco.com/acartpro/
Also, here's an adapter for a two barrel on Ebay:
I wish there was a 2 carb manifold for the OHV (and a split exhaust).
I have that setup for a flathead Champion 6 and I can confirm THEY
WILL NOT FIT the OHV (which is too bad). I'd like it if someone could
fab something up. Maybe if enough of us OHV guys get together...
Finally, Cathcart Studebaker does Champion 6's, but they also can do a
hot cam for the OHV if you ask for it ($200 plus exchange). I have
that on my wishlist:
http://www.cathcartsstudebaker.com/
Scott Rodgers
Robert W Hughes
> OHV sixes? I know theres several replacement carbs for the V8's but
> anybody know of anything that will work on the six?
Here is an idea that might require a little work and exprimentation -
find a 1980 GM X-car with the 2.8L V6. The carburetor will be a
Rochester Varajet. This is a two-barrel version of the Quadrajet, 1
primary barrel and one secondary barrel. Don't confuse this with the
Dualjet which was two primary barrels. This should be jetted about right
since it was made for a 173 cu in engine and with the flow controlled
secondary makes a very nice carb with good mileage and high performance
potential. The power mixture is controlled by an adjustable metering rod
linked to the flow control valve also which makes minor changes easy,
just remember leaner usually runs better then richer.
--
Robert W. Hughes (Bob)
BackYard Engineering
29:40.237N, 95:28.726W or perhaps 30:55.265N, 95:20.590W
Houston, Texas "The city with too much Oxygen"
rwh...@oplink.net
bob stehlik
I run a Studebaker 2 barrel on mine. Get a 2 to 1 barrel adapter for a
VW and bolt it on. Easy fix. Realy wakes up that 6, runs more like a
232 v8
studeb...@gmail.com
> On Sun, 02 Sep 2007 15:16:06 -0000, studebake...@gmail.com wrote:
>
> I run a Studebaker 2 barrel on mine. Get a 2 to 1 barrel adapter for a
> VW and bolt it on. Easy fix. Realy wakes up that 6, runs more like a
> 232 v8
Which Stude 2bbl are you using?
Thanks for the suggestions guys.
bob stehlik
I have run the later Stromberg off a 60 lark and I now run a 55 back
draft stromberg. I like the later model better but the one I have
needs to be rebuilt. I will put it back on as soon as I fix it. There
is another club member using the same configuration in his 53 HT that
has a overhead valve engine and he just loves it. My 60 Lark VI
flathead uses the same setup. You will have to tweak the linkage and
go to a manual choke. You can use the auto choke but it is a bear to
get adjusted. It coast me $10 for the adapter $7.95 for the choke kit
and a old carb out of my extra parts($19.95 for the rebuild kit). Gas
milage went from 23 to 18 but it was worth it I can now run over the
hills without problems.
Wizard of Oz
have the 3.54 rear and T96 transmission. The head has .100" milled off and
the manifolds gasket matched. I run a Holley 1940 that bolted straight on
and once I got the linkage setup it runs much better than the stock carb.
It's a wonderful carb and I have not had any problems with it. It has better
than stock performance but lacks power once the car is over 75mph. It will
pull along at 80mph and top out at 85/90mph but going up long uphill grades
will slow it down to 67/73 mph. When driving in mountains it's the lack of
gears and other cars in the way that slow it down.
The links below will show the carb at work. In video 1 you will hear the
engine under load taking of and going up through the rev range but you will
have to wait until after the traffic light change, the car on my left was
not stopped beside me so don't think he took off faster, he was driving
through the intersection. Video two will show the engine being taxed from a
long grade but does not go below 73mph. Video I'm just sitting with the
traffic at 80mph. Video 4 is the engine after the run and video 5 is the car
its self. A few paint patches but no rust 30K mile car.
Video 1: http://www.youtube.com/watch?v=s8WT36NQD3A Video 2:
http://www.youtube.com/watch?v=8HvqwMOoOgk Video 3:
http://www.youtube.com/watch?v=nzXin1QhjS8 Video 4:
http://www.youtube.com/watch?v=KgXyG6UQH00 Video 5:
http://www.youtube.com/watch?v=z5jBqJZCx-8
I have tried a larger Holley 500 2bbl with an adapter but it was a dog down
low but gave me an extra 5mph up top. I have a Holley economizer, which is a
copy of a Qudrajet but smaller, that I will try in the next few weeks. With
the small primaries it should be just the ticket. If you would like I can
take photos of any of the carbs or anything else on the car and post them at
webshots for viewing. Here is the 1940:
http://rides.webshots.com/photo/2498036170087432881IEgXsW?vhost=rides
I will have to look into the other suggestions and maybe try some out.
Wiz.
"bob stehlik" <ste...@mbol.us> wrote in message
news:geamd3l3guu7qqolc...@4ax.com...
studeb...@gmail.com
specific original application data or the code numbers for the
specific holley 1940 your running?
I think I'll try it out and find one - I'm ready to throw that piece
of junk original carb as far as I can throw it!
Thanks!
Wizard of Oz
the box someone has written General Motors 1974 225-250 with a black marker.
This could be true. It flows about 175-195 cfm depending on what you read.
It's not great but it's better than the stock carb and is smooth. The
location of the numbers are on the throttle side of the fuel bowl just near
the choke rods. 7649 and 1350 are stamped there but I can't match those
numbers. I will look for more info and get back to you.
Wiz.
<studeb...@gmail.com> wrote in message
news:1188788477.4...@r29g2000hsg.googlegroups.com...