pretty respectable. what did you have to modify on the JE piston? flycut the valve reliefs,if so how much. also how much do the lower cases need bored to accept a 108 cylinder. thanks. Im wondering cause im at the point of making some changes and just havent decided what i want to do. thanks

 

thats sweet!

 

Very nice I like this, Because this is almost the same exact build I'm doing for my drag bike plus I'm spraying it.:wow:

 

hell yeah woods, i wanna see that bad boy:wow:

 

I like The #'s would have liked to see it with less smoothing. Congrats on the build

 

Nice curve..good numbers

 

your dyno sure does like flat lines. Not saying anything bad but I've done a ton of dynoing and never seen such flat graphs on a dyno ever, even at smoothing5. Any thoughts on that? And by the way, that is a sweet combo!

 

It might have something to do with the cyl head. just sayin

 

nice pull out on the rpm,, its interesting what they do sometimes...

where is the Tq at though? with an 815 should produce a healthy amount

 

The dyno readings appear to be low. The stock bore readings are the verification.

Old Posts

Overview:
Torque is what you feel and acceleration is when the ground torque results in the quickest time over a measured distance. To achieve the best ground torque you need the widest band with the highest RPM.
The small blocks generate the widest and highest rpm torque.
Example: 450 with 37 ft lbs X 3.63 (gearing)= 134 ground torque.
Weight quad/driver 450 lbs / 134 = 3.35 lbs per torque. = 70 mph

700 with 55 ft lbs X 2.85 = 158 ground torque
500 lbs / 158 = 3.16 lbs per torque = 72 mph

650 with 50 ft lbs X 3.33 = 165 ground torque
525 lbs / 165 = 3.18 = 72 mph

815 with adjusted torque of 59 Ft lbs X 3.33 = 196 ground torque
500 lbs / 196 = 2.55 lbs per torque = 78 mph

As you can see, ground torque has a major influence in hill racing.
The 450 has a torque band of 3000rpm and thus is geared shorter
The 700 has a torque band of 2000rpm and thus is geared taller
The 650 has a torque band of 2500rpm and thus is geared appropriately
The 815 has a torque band of 2500rpm and thus is geared shorter

OMR

 

just sayin

 

there is mph you can see how early and how long this build is pulling it dont take its sweet old time up the mountain and peak at the top it comes on pretty hard and holds it

 

and a smoothing of zero on same graph, anything else?

 

EHS...Looking good as always......:thumbsup::thumbsup:

Now time to spit that bubble gum out and kick some azz.....:beer:

 

That's pretty cool EHS...Most +5 stroker builds I've see don't have the Tq and horsepower curves overlay like that thru 5500 RPM, cool stuff :thumbsup:

 

thanks guys hopefully this next year will be a good one i just have to finish all these projects between me and tim we got a lot to do

 

All the new parts are coming together should be a year for new cams, cranks , starters and more.

 

Nice numbers! Any plans for fsa in Jan?

 

Are you playing with the fuel pressure with the pinky/54mm combo?