Drag Racing Discussions > Front Engine Dragsters

Some basic simple questions

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Curly1:
Second race in and it was good for Number 1 Qualifier and a runner up finish but it was not with out some issues and drama.  Still spinning at the hit too much and bouncing in the shut down.  My plan next time is to raise wheelie bar and tire pressure a little more. I may experiment with raising launch RPM to hit the tires harder and keep the chassis loaded. Right now I am just not sure what is the best way to get this thing handling better and down the track every time and with out drama.
The spin is about .3 into the run and drive shaft RPM spikes up to 1800 RPM and then drops to 1400 and from there it climbs normally and as speed increases.
When I built it I thought the full size battery up in the very nose would help performance, but now I am thinking it is too much up front and may be limiting weight transfer on the launch? Car weighs 1730 and has 389 on the front. I could save 35 Lbs by going to a Lithium battery up front if I have to. What does have to happen is to get this thing working where I do not have any aborted runs unless track is just not there.

I am looking for any help and suggestions here.

wideopen231:
why spend money on lithium.Just remount battery back at engine.If I remember you had issue with spinning motor faster and 12' less wire should help that although you seem to have corrected it>again if I am thinking about your deal and not someone else's. Not that all cars are same and all rules fit every car. Park's told me I needed 300# on front. I am sure the guys with more FED experience will correct me if wrong.  I don't really believe that is issue since most of the time keeping front end down is more of issue. IMO do one or other.Wheelie bar or move weight,not both. Old rule never do two things at same time,if it works.Which one was it. I would put jack under front end pickup till bar hits good and adjust from there. I am firm believer in leaving hard so my vote for the 1/2 cent its worth is for more rpm first then others.

wideopen231:
whats #1 q = et________/MPH________

Curly1:
I am going to try raising tire pressure, launch RPM and wheelie bar first. I am not going to Lithiium battery unless I have to and get video that confirms what it is doing. Right now I just am not sure what it is doing or how to fix it.

AWAG:
Why does everyone say to put a jack under the front end to see how high it is when the wheelie bar hits? The front end gets picked up by the pinion trying to climb ring gear. So wouldn't the front of the motor be your leverage point? Shouldn't you put the jack there so you can take into account the chassis flex? I had an old fed that was a late 60's 186" car. When I put a wheelie bar on it I first set it at 3". That car wouldn't do anything but sit there on that starting line and just spin. Front tires never raised a bit.  What was happening was with that narrow chassis it had a lot of flex in it. Once I put 5" under the wheel it started behaving. This was only with a mild sbc

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