12/10/2009 02:07:22
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Dyno Testing at S & S Machine Shop.
The first pull came up with around 460HP at around 6200 RPM. After a few more pulls and making changes as we went we were able to get 527HP at 7000RPM!! This is awesome because we have never been able to pull 7000RPM ever. The beggest reason the engine wouldn't pull is due to the mechanical advance in the distributor. It is now "locked out" meaning that there is no mechanical advance at all.
Video link of engine on the dyno.
http://www.youtube.com/watch?v=Wc5ig7KpcMY
Testing the New Automatic Transmission: 350c @ Sacramento Raceway (1/4mi. dragstrip)
Ok, so the good stuff right off the top:
First Pass: 13.5 Sec. @ 119 MPH... The engine stumbled off the line but it cleaned out and went. I'd say not a bad time for a 3,245Lbs. truck with a 3.07 rear end gear. I can't wait for the season to start in May, 120MPH in a 1/4mile and El Mirage is 1 1/3miles... looks like this truck is going to be fast!!
(Vid of First Pass)
Seccond Pass: 14.2 Sec. @ 102 MPH... Tires were up in smoke untill about half track... if only it had hooked up that truck would of gone fast!!
(Vid of Seccond Pass)
Weighing in...

Sad News Falls on the Engine
After the last pass at Sacramento Raceway the engine made a wierd clunk on shutdown. After pulling the engine out and tearing it down here is what we found.



The plan is to clean the block and install another crank that we have in the shop. It's a Hank the Crank with a 3.500 Stroke, as long as the pistons will clear the heads with the longer stroke. While the engine is in pieces we are also looking to install a Cloyes timing chain set, instead of the geardrive, to pick up a few more HP. Stay tuned!!
Results from the first meet of the year
After running the May meet we discovered a total lack of traction due to the increased HP. The best solution is to do like everyone esle and add ballast. We are going to start with about 500lbs and see how it does. But, we can't just go putting the ballast anywhere. We need to locate it as low as possible to keep a low center of gravity and where it transfers the weight to the tires the best. We are starting with about 150Lbs (on each side of truck) on the frame rails starting just foward of the rear axel. Then about 200lbs hung from the bed just foward of the axel.
So the results from may... top speed of 154mph and spinning the tires all the way down the track. :(
Video of the 3rd and final run for the meet. The track is definately loose!!