[Ducks Goat]

I'm considering joining up with the local racing organization SEGA here in the Carolinas and run in their Super Stock class. The basic rules are 4 speed only with clutch shifting, the Pontiac engine weight breaks are 370 cid and lower runs at 9.5 lbs per cid and 371 cid and up will be at 8.5 lbs per cid. Intake/carb combo allowed is tri power, 2x4 with carters, or single Rochester. Period correct intakes only with no tunnel rams at all and no external mods. So I figure my best option is an Offenhauser 2x4. Cylinder heads basically any factory head and the only aluminum heads allowed must be NHRA approved. The cars have to be stock looking with no major or obvious lightening allowed. The car I plan on using is our '61 Catalina hardtop and try to mimic a SD the best I can. The only tires allowed are a spec tire from Hoosier 7.0/29.0-15. No kind of traction aids allowed other than boxed control arms, adjustable shocks, basically "stock" looking stuff. Currently the "record" is around 7.40 in the 1/8 mile.

Link to rules:

https://s3.amazonaws.com/ClubExpress...BUuTurpvpbo%3D

So my question to you guys is can the Offy intake support the horsepower needed to run around 7.30 or so in the 1/8 mile. I'm thinking the engine will be around 428-440 cubes with ported iron d-ports. Probably need around 480 or so engine hp to get the et needed. Any advice is welcome.

Thanks.

[Mike Davis]

I think it can be done with a 440 Combo. I tried to get QuainStott to relax the rules some and allow the Wenzler Intake since it will fit under the hood of most Pontiacs. You may want to check as the pictures of allowed intakes show a few tunnel rams and with some work a Wenzler can look very period correct.

The combo I was planning on running was similar my old set up from the 90's---
428 Block, .060,Factory N Crank, Crower Rods, Ross Pistons, Ported 62 Casting Heads, Comp Roller 260/268@.050, .400 lobe,
I ran the Offy 5499 intake on it, with 1 inch spacers and a pair of Carter Comp 750's. Car ran a best of 6.95 in the 1/8 with that combo.
I was going to change to the Wenzler and NHRA E Heads if I built an engine for the SEGA.

My issue is the rules keeps me from crossing over are no monster tachs, no autometer style gauges, and the hand lettering part . I understand why but after having to build a new engine, 4 speed trans set up, buy new wheels, driveshaft, tach, gauges to slow down a second in the 1/8 I opted out for now.

[Chief of the 60's]

The guy that runs it is a clown with very flakey rules. You are better off running in one of the NHRA Reunions.

[bpenrod]

His series, his rules, it's a great show and it keeps growing every year. They have started a couple of ss classes and thinking about some modified production classes a few years Dow the road.

[Ducks Goat]

Originally Posted by Mike Davis

I think it can be done with a 440 Combo. I tried to get QuainStott to relax the rules some and allow the Wenzler Intake since it will fit under the hood of most Pontiacs. You may want to check as the pictures of allowed intakes show a few tunnel rams and with some work a Wenzler can look very period correct.

The combo I was planning on running was similar my old set up from the 90's---
428 Block, .060,Factory N Crank, Crower Rods, Ross Pistons, Ported 62 Casting Heads, Comp Roller 260/268@.050, .400 lobe,
I ran the Offy 5499 intake on it, with 1 inch spacers and a pair of Carter Comp 750's. Car ran a best of 6.95 in the 1/8 with that combo.
I was going to change to the Wenzler and NHRA E Heads if I built an engine for the SEGA.

My issue is the rules keeps me from crossing over are no monster tachs, no autometer style gauges, and the hand lettering part . I understand why but after having to build a new engine, 4 speed trans set up, buy new wheels, driveshaft, tach, gauges to slow down a second in the 1/8 I opted out for now.

The tunnel rams are only allowed in the gasser classes, none at all in SS. I've already spoken with the two guys actually over the SS side of the group. Since this is a new build for me I don't have anything really invested it the build yet and since I was leaning towards a SD style car anyway it shouldn't empty my wallet to bad. Did you modify the Offy much?

[Ducks Goat]

Originally Posted by Chief of the 60's

The guy that runs it is a clown with very flakey rules. You are better off running in one of the NHRA Reunions.

I actually know Quain and the class rules don't bother me at all. SEGA actually started at a car show my club puts on years ago as well so there's a few members we're friends with. Plus the majority of the races are fairly close to home.

[Mike Davis]

Originally Posted by Ducks Goat

The tunnel rams are only allowed in the gasser classes, none at all in SS. I've already spoken with the two guys actually over the SS side of the group. Since this is a new build for me I don't have anything really invested it the build yet and since I was leaning towards a SD style car anyway it shouldn't empty my wallet to bad. Did you modify the Offy much?

The only modifications were,

Center divider was cut down around 3/4 inch, Top plate divider was removed, added a 1/2 open spacer and a 1" tapered HVH spacer. Intake was port matched to heads.

This set-up was around 3 tenths slower than a Warrior Tunnel Ram.

[Ducks Goat]

Thanks Mike.

[455-4+1]

I dont think the intake is a restriction. My pump gas manual trans street TA ran 7.40's 20 years ago with a modded iron Egr Qjet intake at 1850kg.
This was with a flat tappet hydraulic cam
I see no fuel restrictions, our 408 cid Group A Jetsprint engine made well over 600hp with Jim Robertson ported 48's at just under 14:1 comp.

A 400 to 440 inch engine with a great set of small chamber dports and a "hand" modded early qjet intake and a SS Qjet should get it done peice of cake. With the tire restriction u might be better off with less cubes and the 3.75" crank to get it off the line easier and wind it a little higher 😉

[Ducks Goat]

I was looking at 440 cid or so because I figured it wouldn't have as much torque down low as a bigger engine like I had in my '65, plus the weight to cube ratio might put me on the heavy side for a smaller cid engine. The car I'm gonna use is pretty nice and it can't really be lightened much by the rules anyway. I'm guessing with me in it it'll weight around 3700-3800 lbs. The fuel is a max of 110 or lower so can't really go to high on the compression. I just picked up the Offy 2x4 intake from John Holmes this weekend at a car show, he currently runs Arnie Beswick's Star of the Circuit '66 funny car. Plus found 2 real Carter Competition 750's and the same show. Gotta have 2x4 or 3x2 to look right in a '61 Catalina in my opinion. Thanks for the replies guys.

[65nss4spdGTO]

Here is the dyno sheet using the OFFY with 2-500CFM AFB’s, 462ci with ported D-Ports, had to raise the top of the runner via welding, but you couldn’t tell when finished.

Calvin Hill
Hill Performance
708-250-7420

[Ducks Goat]

That's some nice numbers for a pair of 500s.