Funny how it has to turn into an argument to get any good answers. There is finally some good info here! This is what I was after when I started this thread. 350-400hp would be fine for what I'm after. I just need enough power to overcome the rear tires when that trans is shoved into gear at about 3500 and nail it to keep the tires lit up until about 200-300'.

I don't think you have to worry about breaking the tires loose with a Y, they are a torquey engine and do that pretty easily. Matter of fact it's getting them to not spin that is the trick, most 1/8 mile tracks my car just spins the tires the full length of the track, last outing took off as easy as I could in first and brought it up to 5500 then hit second and it broke loose the remainder of the eight. Mine is a .060 over 292 with steel crank, Ross Pistons, .010" in the hole, G heads non ported but shaved .035 or .040" can't remember but I think I am around 9.5 on the compression, Mummert intake, Mummert (clay smith 272 cam) that is with a 9" posi it breaks loose not an open rear with top loader 4 speed ahead of it.

55 Vicky & customline

58 Rack Dump, 55 F350 yard truck, 57 F100

59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?

would like to visit your shop and will be in the area in approx 9 days. could you send your adress and if a visit is exceptable. regards cliff tate
at ct1940@shW.CA  

Billy, What happens if you launch her in 2nd? Lite 'em up??? If this happens it will be a low rear gear(5.50-6.00:1) with a 28-29" tire and a 1:1 transmission with no clutch or torque converter. This is a ridiculous idea to most people but I think it may work. The transmission was made for abuse and has a soft engagement valve. I just have to figure out some things like dragster or altered, front axle options, etc... I'll have significant headwork, larger valves and probably run a really high duration camshaft(310-320 degrees on a 108-110 lsa) and about 10:1 compression. May be leaning toward an altered the more I think about it for weight transfer reasons as well as the possibility of legalization...lol! If I find an old carcass with a title I could run antique tags and zoomies!!! I love ZOOMIES!!!!

Maybe this will tell you if you can overcome the rear tires? This was with my worn out Y-Block and still had the old " Slush-O-Matic " in it!!!  LOL 



I love the smell of burning rubber in the morning!

http://youtu.be/RdeX6BDjdXA




I love the smell of burning rubber in the morning!

I am not really a" brand man",i have a 78 Malibu with a modified 406 sbc in it and a glass T roadster with a 292 inline scrub 6 as well as my 55 ford with a 292.I like both the 6 and the Y better than the 400 just because I dont see them at every show and they are interesting to work on.All 3 are good,reliable engines and make more power than I can use..I reckon a Y forum is just not really the place to advocate SBCs.

Wasn't trying to advocate, just commenting. What rear gear ratio was in your car with the slush-O-matic burnout action???
What tire size??

Is that a dead punch or a brake torque?

I don't know if a burnout with street tires translates to anything meaningful once slicks are used, though the water box is usually used with slicks which might bring it to about the same amount of friction.

The Y produces a strong low end for its cid in stock form and significant increases in horsepower do not necessarily mean similar increases in torque because rpm is a function of that equation.  I suspect that any Y you build for the dragster will do the job.  Back to the example using my truck, HP calculators put it at 222 based on mph and 205 based on et, so lets say 210.  I enter 210hp with 1500lbs and it comes up with 11.22et.  Let's call it 12.  I haven't seen a 12 second anything that couldn't do a burn out.  Build one at 300hp or more and I really don't think you will have a problem.
And I don't really know anything about dragsters.  Maybe there are other dynamics involved, that more power is needed.  Hopefully people who know will speak up.



Lawrenceville, GA