Who has a STRAIGHT 6 in your HotRod? Come On, stand up!

Watch for Offy intakes set up for 2 one barrel, 3 one barrel, or 4 barrel, I see them on ebay frequently, search '250 Chevy' or '292 chevy' all of the 194 stuff will be in there (the stock heads are the same on 194 /230 /250 /292). Also Clifford makes one for 4 barrel, water heated, if you want to run headers. If you want to keep the stock exhaust manifold with the heat riser the offys are the choice as they bolt right on to the stock exhaust manifold, which you can split and run duals.

Mileage on my 250 is 18mpg with 2 potbelly Rochesters on offy manifold with no overdrive with 4:1(I'm not sure of the exact number, it's out of a mazda B2000 truck) . With the high torque I'm getting with the 250 it would drive a much lower rear end ratio nicely I think, since I don't even need to use low gear to get off the dime. I estimate that with rear ratio somewhere in 3:1 range highway milage should be around 25mpg. The manifold in the picture, on 250, will bolt onto the 194.

 

In my hot rod 29 Nash, still developing it, a Chevy 292 with three monojet carbs. When I'm done with lump port head work and cam, it'll be a real tire burner.....
Right now it's in the fun stages, driving it a lot and loving it!

 

That's good mileage, What rearend ratio are you running?

 

Those engine turned side covers are bitchin!

 

Stock Chevy 250 with TH350. Offy 3 X 1 manifod with 3 Rochester Bs running on center carb and a Petronix ignition. Fair performance in a light vehicle.

 

Really?
So the combustion chamber in the head on a 194 is the same width as that found on the rest of the Nova 6's (and the 153)?

Your axle ratio should be 3.91:1. I've got an '89 B2200. I believe they started using that ratio with the advent of the B1800.
Great milage, btw!



6narow

 

Twisted 6, Yes its a old Clifford with 3x2 Holley, The guy at clifford told me that it would take 700 HP, to run that unit. I wanted something that was going to easy on the street what do you think.

 

WILD!
Those exhaust pipes look like a set of guns off a WWII fighter plane!

Speaking of which, I've seen those "straight-out" type of exhaust pipes before.
Does someone manufacture those or are you guys building them custom, just for your rods?



6narow

 

250 w/ 4 speed. Home made intake & exhaust.

 

The head would better handle that intake with a lump port.Which would help speed the air flow up.And maybe very well help the low end side of things. But that intake was still more designed for mid to top end power.Pretty much like the clifford intake
(4 and dual 4s intake)compaired to the Offey which is a Very good Low end to mid Range power Intake. But If ?? it was me I'd try it anyway. Just use small CFM carbs
And get some type of balance tube. And if you didn't want to drill the intake to add one USE a small (1/2 inch ) spacer under the carb and drill & Tap for lets say a 3/8 size tube.Also as for a Spacer USE a 2bore spacer NOT a Open holed spacer,This will help trick the carbs(Vacum signal) in thinking they are sitting lower on the intake.

 

Thanks, I jacked up one rear wheel, truned the pinion till the tire went around once and the pinon had turned twice. now I know the exact.

I am running 30.5 inch tall tires (500x20s on original 1929 20 inch wheels) which helps with the mileage I'm sure.

 

Here's a Canadian 194 in my '63 Acadian Canso

 

Here's mine, nothin special, 235 rebuilt by sears allstate, though I don't know when. It was stuck when I got it, but I got it freed up and checked it out, lapped a couple valves, then added HEI, split manifold, and rochester 2V. Just got it running, this was recorded today.

 

Yeah, believe it or not, that little axle holds a 43 tooth ring gear!
Yours and mine share an 11 tooth pinion, thus the 3.91 ratio (actually, 3.9090909...)
The Mazda 4by's change that to a 10 tooth pinion, which drops the gear ratio down to 4.30:1 (rear axle on 4x4 larger, but front differential/third member is the same as ours).
@ 60mph, your engine is turning 2584+ rpm.
Not a bad speed.
My Dad's '74 C-10 had a 250. @ 65 MPH (indicated on speedo. Actual speed closer to 60) his engine was turning a little over 3K and we'd often average 15-17 MPG going across to the other side of the state to go hunting, when I was a kid.
I miss that old truck.



6narow

 

BobW,

Sweet car!
Cudos on the work you did on it. Sano!
What's with the 4 little hoses leading to the top of the radiator, though?
Just trying something different?




6narow

 

Yup!.......for now....
Soon to be replaced by a 440....but dont fret, the 230 will live on in a '30's Sedan. She purrs just too damn sweet to toss it.

 

so then i take it this nova wagon im picking upfriday, since it had 13 inch wheels and tires stock with 3:36 rear gears and now has 14's it will go down the highway pretty good id like to drop a t-5 into it since its already a stick.

 

6narow, thanks for the kind remarks. I used a vintage sprint car radiator that was set up for 4 corner cooling on a small block Chevy. I water heated the intake manifold and I have a heater, so the beast has about 18 hose clamps. To balance out the engine compartment, I ran 3 of the exhaust pipes under the engine and out the right side into a matching megaphone.
Bob

 

BobW,

VERY COOL!
Thanks for explaning that (and "18 hose clamps" - ROTFLMAO! )
BTW, Do I spot a Firestone "Town & Country" tire wrapped around the drivers side front wheel?
----------------------------------------------------

283Nova,

Your little six oughta do just fine.
That's a nice ratio that used to be offered in the 8.2" rear ends.
I had that exact ratio in my old '73 Vega GT wagon and it did alright.
185/70-13's gave me about 22MPG @ 55 and 112MPH on the top end...not bad for a stock 2.3L four, eh?

If you want to figure out engine speed, like I did with 29Nash's car, I used the following algebric formula:

Speed in MPH x effective final drive ratio x 336 / tire height

This will give you the engine's RPM at a given road speed when using a tire of a specific height.

...for instance, with 29Nash's car, if he's going 60mph, has 3.91 gears in the rear end (and high gear is 1:1), using 30.5" tall tires, then the formula looks like this:

60 x 3.91 x 336 / 30.5 = 2584.4459 RPM

Since you want to run a tranny with an O.D. high gear, just remember to calculate the effective gear ratio when in 5th (axle ratio x tranny O.D. ratio).

In your case, if you don't change the rear axle gears, your effective gear ratio in 5th would be 2.5536:1 (3.36 x .76).

The nice thing about this formula is that you can run forwards or backwards (can't always do that with all formulas).

...SO...

If you want to know what gear ratio will give you a certain engine speed using a specific tire height, just run it backwards and multiply where you divded and visa versa.

For instance, with 29Nash's car; if he wanted to know what gear ratio would give him 60 MPH @ an engine speed of 2000RPM, using 30.5" tall tires, the formula would look like this:

2000 x 30.5 / 336 / 60 = 3.0257935:1

If he were using an OD tranny, then he'd simply divide that gear ratio he came up with, by the OD and that would give him the axle's ratio.

For instance, if he was running 25% of OD, then he'd do this:

3.0257935 / .75 = 4.0343913



If you don't know, off hand, the height of your tires, you can simply measure them and that'll be pretty close...

...OR...

Calculate the height, using the tire's listed size.
Remember that the older bias-ply car tires used an 82% aspect ratio. "Lettered" tires tended to use a 78% aspect ratio (but you can't plug letters into this math formula, so that info may be moot anyway )

For instance, my old Vega had 185/70-13's.
What I do is translate the width of the tire ("185") from metric to inches, by dividing by 25.4 (25.4mm = 1").
Multiply that number by the aspect ratio ("70"), and don't forget to hit the "%" button on your calculator, instead of the "=" button, this time.
This gives you the height of the sidewall.
Since you measure the sidewall twice when measuring the height of a tire, you double that figure ("x2"), then ADD ("+") in the wheel's diameter ("13").
I come up with 23.19685", which I round off to 23.2".
That's the calculated height of the 185/70-13's I used to use.

Hopefully that didn't give you brain freeze ( ), and will help you when it comes to figuring out how exactly you want to setup the drive-train of your wagon.




6narow

 

my brain it hurts so much thats damn good info, thanks 6narow, for some reason i keep figuring this thing is gonna be screaming at 3097 rpm down the highway holy shit!

 

I stuck a '62 235 in my 37 chevy, dual ss intake/exhaust, T-5, 35" wires in rear with 3:08. Runs great!

 

37Rat,

Sweet ride!
Nice work.
How did you build the intake manifold?
--------------------------------------------

283Nova,

Yeah, I usually make everyone's brain hurt whenever I post something like that.
Ah well, just digest it for a while, refer back to it a few times, play with it, you'll get the hang of it.
Its nothing real difficult. Just some info I've picked up over the years.



6narow

 

Hey 6narow! Thanks a bunch for the calculatin'. Since posting that last I received via FEDEX two 650X20 tires for my rear axle, they're just a bit taller than 33 inches. I spent yesterday morning putting them on and took it for a drive, it felt better. No matter what the response in performance my buddys say it looks bad ass.

Side note; I have two cars, one is 29 chevy pickup with 250 with 2 potbelly Rochesters on Offy intake, the other is 29 Nash with 292 with 3 monojets on a stock intake I converted. The Nash is the one I put the 650s on. I have to slap myself when talking about, not to confuse one from the other!
Like you suggested in your long explanation I did try to figure it out and got the BRAIN FREEZE just as you predicted!

Anyhow I'm figuring out at 60 mph the motor in the car with the 650s (33 inch tall) is doin' around 2200 turns?


Thanks a bunch for the input!

 

292 Chevy with 3 Rochester Monojets.
250 Chevy with 2 Potbelly Rochesters

 

29nash,

Those are some meaty tires!
...you'll start pushin' deuce-and-a-half sizes if ya' go any bigger.

Glad I could be of service.
I got a little brain freeze when I started playin' with that stuff, in the beginning, too.
As I told 283Nova, just play with it, you'll get the hang of it (it can help pass the time while you're doing #2 on "the throne". That's what I do ).



6narow

 

Thanks!

 

yer welcome!

 

i do

 

Righteous ride, truckedup28!
LOVE that colour in the engine bay and the engine.
Is that Teal, or is it called something else?
Can't wait to see the finished product.
Can you please give some details on the motor?


6narow

 

I'm putting together a 56 sedan with a 250 chevy. Propane carb, trunk mount turbo, 3spd with overdrive. Lowered, sitting on steelies with wide whites. No pics yet. Currently building motor mounts. Need a 4bbl intake if someone has one to get rid of.