Drag Racing Discussions > Front Engine Dragsters

The boys from Kansas are at it again

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JrFuel Hayden:
Thanks Bill for your interest in comp and JrFuel racing. I'm uncertain that allowing alum heads would attract more teams, and I don't want the current Heritage JrFuel teams feeling they have to spend a bunch on a rule change. Also, let me repeat, "iron heads make more power than alum". An example came from a Texas racer bought/ built a set of iron heads when SWJFA changed their rules to come closer to Heritage rules, So the racer not happy he was going to add more weight, dyno tested his new iron heads, and was shocked to see he picked-up 50 hp over his alum heads. With no other changes, IE same valve sizes, port size and combustion size. OK, now you ask, HOW can that happen, alum cools better than iron, so you have more heat in your combustion cambers, and alky likes more heat, besides the fact that heat IS energy.  I try to get my heads up to 200° with water in the block and heads, while staging. You may have to lean your barrel valve [ and readjust your idle] to built good heat.
When I was looking at alum head options I looked for alum "Spec" heads to try to keep cost down, but only found heads that flowed less than our current iron heads. If we do allow alum heads, does that mean we could run the latest Gen Hemi heads ? Or AJR billet heads ?
So Bill, if your comp car can switch to iron heads .................

ricardo1967:
If modern Jr Fuel can't tip the can, shouldn't it be called Jr Alky instead??  ;D

JrFuel Hayden:
Again when the new nostalgia JrFuel was formed in the 80's, the idea was to make the new cars LOOK like the nitro JF cars of the 60's, and not cost as much to build and race. Also the new JF cars could not run the same combo as the nitro JF, because nobody makes a slick that you could smoke to 1/2 track, plus it seems all tracks use VHT, so smokers was out.  New rules were NO nitro [ pure methanol] , max tire width 12", 2 speed auto trans [ no Lenco] which means Powerglide, 3.5 lb/ci like the old days, stack injectors, zoomie pipes, and all iron heads and blocks. Then when some teams discovered the New Zealand made 14° & 23° raised runner iron heads the performance picked up, and because it costs about $20k to convert to the 14° combo, some racers suggested making an "A" and a "B" class.
I hope this clears-up some questions.
BTW isn't methanol a "FUEL" it's not gasoline , right ?

Jon

ricardo1967:

--- Quote from: JrFuel Hayden on March 31, 2015, 12:09:05 AM ---Again when the new nostalgia JrFuel was formed in the 80's, the idea was to make the new cars LOOK like the nitro JF cars of the 60's, and not cost as much to build and race. Also the new JF cars could not run the same combo as the nitro JF, because nobody makes a slick that you could smoke to 1/2 track, plus it seems all tracks use VHT, so smokers was out.  New rules were NO nitro [ pure methanol] , max tire width 12", 2 speed auto trans [ no Lenco] which means Powerglide, 3.5 lb/ci like the old days, stack injectors, zoomie pipes, and all iron heads and blocks. Then when some teams discovered the New Zealand made 14° & 23° raised runner iron heads the performance picked up, and because it costs about $20k to convert to the 14° combo, some racers suggested making an "A" and a "B" class.
I hope this clears-up some questions.
BTW isn't methanol a "FUEL" it's not gasoline , right ?

Jon

--- End quote ---

Thanks for the education Jon!

wideopen231:
Ricardo you now owe Jon 10 bucks. Hey baby education in America cost money. Running joke of mine and just seemed to fit.

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