taps

i have a tube chassis beretta,strut front,4 link 2500 lbs with me in it.430 gear ati glide,16x33 tire.a am going to run a 468 chevy,rectangular port edelbrock heads,636lift solid roller 871 bds supercharger,2 825 demon carbs on gas,going to run between 10 and 15 psi boost.motor is o ringed,callies crank all good parts,has anyone run a combo like this,i would like to know about what type of horsepower and performance to expect.also what do you think about a small shot of nos on this set up?

woodsman

taps do you know your base HP if not what compression are you running.

taps

dont know hp,running ross flat top blower piston,about 7.5 to 8 to 1

woodsman

taps you have to understand that this is just a guess and I am a bit conservative with the numbers because of the amount of variables in this. But going by the info that you gave I am going to have to say around a 5.90/5.80 ET & MPH 115/118 thats if you get the boost you show. Well be sure to let us know what it runs after your pass. And make sure you have all your safety stuff to go with a number like that.

taps

i did run the car with this engine minus blower had a single plane intake and 825 carb it went 620 at 112 in 1/8 and 975 at 135 in 1/4.i also tried it with a 150 nos shot,hitting it right after launch it went 904 at 155 in1/4 and584 at 118 in1/8.THANKS for info.

woodsman

OK taps I am glad to see that you have been that fast before. So you knowing how to run a car at that ET than my non conservative figure was a 5.60/5.70 an with a small shot like 75hp and no bigger and also with a retard control box you could see 5.40/5.50. Make sure your timing is right with that juice and talk to some people that have done it before to give you some hints on what not to do.

zipper06

Another thing to consider, blown gas cars love intercoolers.

Zip.

woodsman

Hey Zip I think thats why he was going for the nos to cool the air charge on the 871 blower. He is going to have a wild ride for sure.

zipper06

Could be you're right,
right now the big rod show is going on over her in Gulf Port, it's a week long show. there's a 68 chev truck with a 1071 blower on gas that the guy is driving around. He said before he put a 4"tall intercooler on the truck he couldn't drive it at all. He said with the intercooler it dyno'ed at 1000 HP and it's totally streetable with the big blk. He also said he only ran it 1 time and it didn't hook until 1/2 track on wide mickey street tires, it only ran low 11's but at 140MPH. They wouldn't let him run it again because he didn't have a full cage.

it was just a thought.

Zip.

woodsman

taps now that looks like a plan to me. Zip thats some very good info.