60 foot times.

[mphfreak]

Whats the best way to quicken my 60 foot times on the ice sled without sacrificing top end. Right now ive lightened up heels of my weights with steep cams. Finding that i cant get quicker then 1.28 sec. in 60 feet. Does removing heel weight help to come out of hole quicker with the steep cams? Ive tried shallower cams with more heel weight and not much change. I can grind more but not sure if this is the way to go.

1040cc custom 4 cyl. 9800 rpm in wahl open mod 136 inche chassis.
best set up yet...
3 ramp bearcat primary converted by microbelmont to a quick change. 65 gr. heelclickers with 2 grams in tip( engaging at 5500rpm. bearcat secondary with red white cat spring 55 / 49 helix. (best 60 foot 1.28 @5.35 sec 660 feet)

Any help to get that 60 foot time near 1 sec. would be nice. What am i not seeing guys? Help me out .

Thanks

 

[MDS]

om

MPH Freak,
A lot of things enter in to having a fast OM:
Is the carburation clean?
Does the sled transfer properly?
Are you hooking up?
How much HP?
Gear Ratio
Remember, with the Bear Cat Secondary, and Primary; 1 7/16 Belt is required, and your Gear Ratio will be approximately 17% taller.
With a 5.35ET, you're also loosing a lot on the big end. MPH should be 134-135, and ET should be in the 4.80s.


MDS

 

[mphfreak]

mod

4 cyl dual rotary. 286 hp down east. at 9800 rpm.
The sled leaves the line without spinning with skis about 6 inches carrying for about 80 feet. transfers beautifully.

Just got back from testing. got 60 foot times down to 1.15 and 660 foot time down to a 5.11. We are using brower timing lazers. We find the numbers we get from this is are always 2 tenths slower then the race track at 660 feet. Elevation here is 2500 feet, (northern Alberta)

We are playing with gearing at the moment...Geared for 137 mph. may need to go up a tooth or two.

 

[Kraven]

4 cyl dual rotary. 286 hp down east. at 9800 rpm.
The sled leaves the line without spinning with skis about 6 inches carrying for about 80 feet. transfers beautifully.

Just got back from testing. got 60 foot times down to 1.15 and 660 foot time down to a 5.11. We are using brower timing lazers. We find the numbers we get from this is are always 2 tenths slower then the race track at 660 feet. Elevation here is 2500 feet, (northern Alberta)

We are playing with gearing at the moment...Geared for 137 mph. may need to go up a tooth or two.

Just a thought, with the skis I'm assuming above the timing lights @ the 60' mark, is the front of the track then tripping the timers for a" falsely" slower 60' time????????

 

[mphfreak]

we set the lazers to catch the hood, which at 60 feet is about 12 inches off the ground. it is the same length as the skis. Went racing this weeknd and we pulled 9 out of 11 races average 1.00 sec 60 footers. Our fastest E.t was 5.08. Getting there slowly. The browers are definetly only good for testing and a good indication of results. The timer itself is slower then any race track we been too. Its better then seat of the pants because that fools you.

Had to pull out of the finals because the recoil flew apart and took the msd triggers with it. Next item on the to buy list is an electric starter.
No more recoils.