I was thinking of pulling the belt for some runs my next time out in my quest to reach 11's. Anyone notice any signifigant gains from this and did you run into any problems with it like a dead battery afterward? Thanks.

 

I usaully see a .1 and 1mph gain from dropping the belt. You can only run once or twice at the most with the before the battery gets weak and may not start the car after the second run w/o charging. I don't do it too often but it definately makes a difference. Someone form Thunder says like 15rwhp The best wau to do it is run the car a few passes then drop the belt for the last good run. I am looking for a way to just run the alternator and not the others like the LS1 guys do (shortbelt) but I haven't really looked at it yet.

 

Wow those are some nice gains! I'm putting in a new Optima red top to be safe since my original isn't holding a very good charge anymore. I think I'll give it my best next time with the belt and if that still doesn't do it I'll try removing it for the last run or two, plus I'll probably pull some more weight to to be safe

 

I gained 14.7 rwhp on the dyno when I dropped mine. But I'm not quite stock so no clue what it will get on a stock motor. I know frank B says his is good for a consistant .07 to .08. clint says .1. Me..when I saw what it was costing me I got rid of all that crap. I relocated my alternator to the bottom and only run one little tiny short belt. Not to mention it save me 22 lbs...heheheh.

 

Tim, what relocation brackets did you use?

 

Interesting gains...I always thought it wasnt worth anything appreciable. Ill have to try that next spring.

 

I tried to make 2 passes this year without the belt & the car missfired bad on both passes. Ran it again with it back on a few weeks later & it was normal again...

 

madman

 

An alternator running at full charge usually only eats up 5 hp at the most. If your battery isn't run down then it's not going to be working at full charge even with all the electrical devices turned on.

Unless you have a fully charged battery or two on every pass, it's better to use an alternator. The ignition plus all the other electrical components work better at 13.6 volts.

With the electric fan, water pump, ignition, transbrake etc, I still use an alternator but I've also used 2 batteries. I just pulled the second battery out this winter to save some weight.

 

Has anyone ever tried a 16volt battery?
Most ProStock cars use this. I wonder if that would be a better route as for voltage drops, this way the voltage still remains up.

Consider this on the alternator when running it put outs anywhere from 13.5-14volts I don't see why not it would not work.