OLD Modified Corvettes

[randy wilson]

Just sent it Dick.

[randy wilson]

Joe, that was a great article at competition plus. Great article. But the similarities are close, but not the same. They had 4 manufacturers, with 4 totally different cylinder heads. Don't know about American motors, and mopar, but, for instance, I believe the head of choice for GM was the 461X. For Ford, it naturally would be the canted valve Cleveland. I'm a little familiar with both, and the X head flowed around 220 out of the box, and with a great valve job, and what matching was involved, never exceeded 240 cfm. The Cleveland, out of the box would go 285 cfm. I don't know what the mopar 18 degree stuff did. There in lies the problem. Brodix, if anyone cares to look, are as follows. (And I'm close here, not exact.) Chevy, 269 intake, 179 exhaust, Ford, 272 intake, 202 exhaust, Mopar, 270 intake 200 exhaust. That class would still be going today, if they had something like that. Just my opinion. If you let the Chevy use external port plates, 1\2 inch thick, with no internal mods, the exhaust flow goes up to close to 200 cfm.

[randy wilson]

Here's the exact flow numbers at .700. Chevy, 269 intake, 182 exhaust, Ford, 270 intake, 202 exhaust, Mopar, 269 intake, 198 exhaust. Gentle men, start your engines!

[joespanova]

I'll vouch for the addition of port plates as my heads were tested years ago without the plates ( I have the numbers ) and now Larry Meaux has retested my heads and there was a considerable difference with just the plates. The plates were actually added years ago.
I'm anxious to see what he can do to improve them ( heads ).
I'd still prefer something replicating the old Modified Production cars of the late seventies to early / mid eighties.

[joespanova]

This car seems to get plenty of "ink" so I'll use this as a perfect example:

http://bangshift.com/gallery/the-gra...o-gallery.html

http://bangshift.com/blog/car-featur...69-camaro.html

[Dick Butler]

The vette was even better....

[randy wilson]

Beautiful car Joe! And would still look, and sound great with a spec say, 321 c.i.d. The challenge in my opinion, would come from the short block design, intake internal porting, cam choice, carb choice, gear ratio, and chassis set up. The challenge would still be there, and the hard workers would still be rewarded. It just takes the money, and guess work out of the heads. Valve jobs would be a MAJOR challenge. Just think, we would NEVER have to search for a better head, or the head porter of the week. We'd look at cams, and intakes REAL HARD. I've ran the spec head, and the thing I found consistently with 3 sets of Chevy heads, and 1 Ford set, was no 2 ports on the same head flow the same. But, it's the same challenge for everyone. The set I ran the best with flowed 258 on the best port, and 253 on the worst port at .700. I did see one head that flowed 269 on a couple of ports, but were slower on the car. Go figure. The way I look at that is, if you think those flow numbers got you beat, you were real close to winning.

[norm saibene]

to run good in super stock modifed it takes alot of hard work and is not chep first of all i think nhra does not care about the money to make your car run they are not going to put a class in there races because the pepole dont want to spend money that would be a better suggestion for ihra , nhra does not have enuff time to run the clsses they have like they are going to put a class with 10 cars in the rotation , there is enuff classes in super stock and stock to fit in, why try to change a good thing, that class would be good at weekend stock super stock races

[Mike Taylor 3601]

I like your ideals,the spec head,I believe is the equalizer between brands,and best for cost.
I think two things that would be required though are high side rev limiter,and wheelie bars,I like the ideal of 14X32 tire rule like SS has that Dick added,does'nt mean you have to use 14X32 but that is biggest you can use.
High side limiter is money saver,when you are spinning stick car wide open on starting line and break on launch,rev limiter will save bottom end,and will get you out w/bent valves at the worst.
I believe running mod type car w/out wheelie bars is risky and I don't know of any good reason not to have them.

Pictures of Granny Goose car brings back memories,My Dad has told story as long as can remember,about one of his favorite wins,was big race @ Mt. Park he beat the Granny Goose car in 1/4 finals and had bye to finals and was gave option to set it out so he was sitting in lanes wating for final round,Dave Lewis came over pulled money out of pocket and said this car ain't legal,my Dad said I tell you what pull yours over hear and you pull a bolt and I'll pull a bolt,he said Dave put his money back in his pocket and walked off.

Mike Taylor 3601

[randy wilson]

Mike, I like the idea of any size tire. I like the idea of a rev limiter, I like the idea of wheelie bars. I was just incorporating others thoughts, along with some of mine. I own belt drives, star vac pumps, external oil pumps, etc. Just was trying to appeal to those who fell by the wayside, because a $1,000 here, and a $1,000 there, and pretty soon, you're talking about some serious change. I think tires are a non issue now. Same with wheelie bars, and rev chips. The heads are, and will be the limiting factor. As long as they never let a gray area in, and stick to the rules.