Do YOU have 4, 6 or more CARBS on your HotRod ? Stand Up if you do !

So, do you have 4, 6, 8 or more carbs on your HotRod ?

What `combination ' are you using "

Did you do it 'Yourself' ?

If not, who did your set-up, and are you pleased with the quality, performance and price?

Do you "really" drive it allot ?

Have you pulled out all of your hair trying to make it run worth a **** ?

Would you do it again ?

I want to hear it from you, and post some pictures of your set up if you will.
Maybe we can shed some light on this subject for all to learn from.

I have a 401 Nailhead that really would look good with a bunch of carbs on top of it, but I'm not certain that I want all of the leaks and headaches that go with it.

Spand Up....... and let's here your story !

 

I've got six 94's on an old crower "U-Fab" log intake on top of my 354. Not sure how it's going to run yet as it's not done, but let me tell ya, it's a serious PITA to figure out the linkage!!!

 

I had six on the old y block then four on the Latham (but never ran it) and then six on the Lincoln and then 8 dueces on the other Lincoln. All built by HAMB'er ****ster and was very very happy with all of them. Plus, he makes them so damn pretty.

 

everything I've ever had was designed to run with two primaries and all the others as secondaries with progressive linkage. I've got a straight linkage from one of my old 8x2's if anyone needs one.

 

I have eight 97,s on my coupe yes the all work and work well.......

I set them up myself

Also its much eaiser on a blown engine

 

I am running all six 94's on a Offy intake, non progressive linkage, its all or nothing. It took me all this summer and 108 p***es this summer to learn the steup. First night at the track it only ran 15.7 to 16.0, and know has run 12.28......It has been a total killer experience....and would do it all over again. Would never run a single four barrel on this ride. It gets a complete jet change and drilled squirters for the track, unless your into m***ive bog off the line. I've sync. the carbs with a uni-sync, and have tried a vac*** gage set up ,that I made up. Now it has no bog or hessitation, just will plain old git....Racing it at the track has gained good info that made my street set up Evil...I also ended jetting each carb different based on how the plugs read. It wasn't easy but wasn't hard either. Keep a good log on all your changes. You really must have a love for it, changing 12 jets at the track can be some work, just a temp change, and you find your self re adjusting. The engine is a simple 327 .030 over @ 10.34 comp. Camel hump heads 2.02, small Isky stick with a 108 center line and .464 lift and 221 dur. @.050......Not much but seems to work great and gives me lots of vac*** to work with for the carbs. When I started runnin at the track I was only running the outer 4 carbs, and learned how to tune them in...Then brought on the center two, more air and fuel= more power........The linkage has to be dead on............Lots of fun.........Littleman.....wanna race

 

as soon as marty comes through with the desoto intake, i'll have 6 strombergs on the hemi. probably only run the center two since the motor is still stock, low compression, no cam, automatic with no gear in the rear.

i have a 283 with 6 holley 94's to go into a model A 5 window. aiming for 10:1, nice cam, 4 speed, 3.50 posi rear. will try to get all them to function. don't know if i'll go progressive or straight up on the linkage.

 

This is great information!

 

My soon to be set up in my truck?car? or whatever.

Will run progressive linkage.

 

Where are all of you with multi-carb set-ups ?

 

got six Holley 94s on the 401 Nailhead for the model A. the A is a looooong way from done but the motor looks cool sittin in the shop.

i bought the setup from my friend Denny Lesky (Ionia Hot Rod Shop) and he had had it rebuilt and setup by "some old German guy" who apparently knows his way around multi carb setups. i plan to run progressive linkage at the moment.

 

So, do you have 4, 6, 8 or more carbs on your HotRod ?

6.

What `combination ' are you using ?

6 97's on a log manifold.

Did you do it 'Yourself' ?

Yes, With help from my good buddy Marty at NW Speed who supplied me with a *****in linkage setup and jet plugs. http://www.nwspeedequipment.com

Do you "really" drive it allot ?

Daily.

Have you pulled out all of your hair trying to make it run worth a **** ?

No.

Would you do it again ?

Yes.

Carbs do not require voodoo, just knowledge. I suggest getting your hands on a David Vizard publication or the like. All carbs work off of the same basic theory... and it's a simple one at that. Tuning a multiple carb set up is very easy once you know and understand carb theory.

LP

 

LP,

What kind of MPG does your car get on the open road ?
Glenn

 

Hey Glenn, Heres a pic of the nailhead in BAD KARMA. It runs great but the Strombergs still weep a little. I only get about 4mpg but most of that is the motor

 

If I put the big gear on the bottom in my quick change I can get from 16 to 22 mpg. Keep in mind that I run a TH700 with overdrive and a lock-up converter. As long as I can keep my foot out of the throttle it gets good mileage... however, there is much more to life than gas mileage.

LP

 

Hmmmm, 4 MPG .....maybe that's why I'm leaning toward a Q-jet

 

She'll be getting a blower shortly w/ 6 carbs....

 

I'm running 4 97's inline on my 354. Did it myself. It's progressive starting with #3, then #2 and finally #1&4 come in. I put them on an open plenum chamber that sits on a four duece Weiand intake.

Runs good and idles nice. Best so far is a 13.42 and got 19 mpg on the drive home.

I don't drive it every day but I'm not afraid to take it out. Longest trip so far was just short of ten hours one way.

I cheated setting her up. Used an oxygen sensor and a Westach ****og air/fuel gauge.

My 97's just have kits in them, not a "real rebuild" so I live with some fuel weaping.

I'd definitely do it again!

 

Kerry, ....... I don't see using the tools available today as cheating, I see that as a major plus in getting the system right.

 

I guess it's not truly cheating but it's not "traditional". ;-) That would mean reading the plugs. Maybe it's just me but they don't seem to color with unleaded gas like I remember with the leaded stuff.

 

yea, but ! .... is welding with a Mig traditional? ....or using a 'Wiring-harness-kit' ??? ......I say your right-on-the-money, as todays junk-unleaded-fuel is difficult at best to read. Smart...very smart on your behalf.

 

Even with the sensors there is a learning curve. The oxygen sensor I was running was a single wire and took a while to heat up. Was sort of a pain. With the new lakes style pipes I made (getting aluminum power coated as we speak) I'm putting a heated sensor in so I get better readings, especially right at startup.

Now the interesting thing, having the gauge to watch can be sort of disconcerting with the 97's. Cruising down the highway I'll be right at 15:1 then all of the sudden it'll jump straight to 12:1 and after a while jump back to 16:1. Never found any good reason for the shifts. I'm sort of guessing at a sticking power valve (97's use a mechanical one) but you'd think that romping the throttle would take care of it and it often doesn't. Doesn't appear to be a fuel pressure thing either as I'm right at 2.5# cruising and am using Gross Jet float valves.

I have had some minor vapor lock issues. If I'm watching the gauge I can tell a couple of minutes before it starts to stumble. I've got an aux electric pump to resolve that.

 

I've gotta say, that I would most likley lean toward using either Carter or Rochester carbs, if for no better reason, tunability.

 

i was running 4 94's on my pontiac in the a, until the left front float got stuck and it leaned out the two front cylinders on the drivers side and popped holes in both pistons. i pulled the pontiac and threw a single 4 barrel sbc so i can sell the car soon. the pontiac is sitting in the garage, it will get fixed and eventually find its way into another car but probably something that will only run a 1/4 mile at a time.
the pontiac did run great with 4-2's but it had some other drivability problem, mostly just to much compression for the street. yes it would make more hp with a single 4 but that takes part of the fun out of it.

 

bttt

 

Kerry, I am interestd in learning the sensor/guage setup you speak of. Is it possible to do a tech post on it?

 

Here's mine. 401 nailhead, w/94's, progressive linkage from NW speed. NOS Offy log manifolds, vintage eelco fuel block from unclescooby. Haven't run it yet, but I'm getting closer!

 

Nothing to it really. I originally put a threaded bung in the drivers side exhaust pipe close to the headers where it wouldn't be seen easily. The single wire sensors use the heat of the exhaust to get to operating temp so they need to be near the engine but not to close. There is such a thing as to hot. It won't register till it warms up. The single wire runs to the Westach gauge. I used a single wire sensor originally cause they're cheap.

The pipes I'm changing to have the sensor further downstream (cooler) so I'm using a three wire sensor. Again cheap because I picked up an unused MSD one at a garage sale fore $.50! They run from $75 and up. Only one wire is for the sensor, the others are for a heating element to get the sensor to operating temp. This means the sensor should register almost immediately.

I really like the ****og Westach gauge. No dumb LED's. http://westach.com/ They don't sell to individuals but will direct you to vendors who will sell to you. Unfortunately the gauge I got from a dune buggy place out of California had a vendor name printed on the front. Intended to paint it black but still haven't. Someday...

Here's another site that covers the basics pretty well.

http://www.california.com/~eagle/instr.html

 

anyone else ?