Jim's turbo motor tech page
This is Jim Hagethorn's newly completed street car. The motor in this car is what created the wheelie picture in the background. So if you see it on the street, be prepared. click on the picture below to see a larger view.
be patient, it takes a little to load
Engine/ type 1 as41 case
Displacement / 1915
Builder / Mike Shelden
Crank / 69mm counterweighted
Rods / Scat H beam 5.394
Pistons / 94mm Cima
Rings / Cima
Cam / Kawell grind (.430 lift at valve)
Rockers / Stock w/Gene Berg shafts
Heads / CB 044 no porting done
Valve size / 40 x 35.5
Compression / 7.2:1
Ignition / Bosch 009, blue coil, msd rev limitler/2step
Carburation / Weber 40 dcoe w/32 venturies
Intake manifold / Kawell center section, stock end castings
Exhaust system / Kawell 1 5/8"
Flywheel / 200mm 12.5 lbs.
Clutch / Kenedey 1700lbs.
Clutch disk / Stock rigid
Oil / Penzoil 20w-50
Oil cooler / Stock doghouse
Turbo/Turbonetics T-04B sized by Kawell
Transaxle / type 1 swing
Builder / Pelequin Transaxles
Ring and pinion / 4.12
Gear ratio / 3.78 1st, 2.21 2nd, 1.56 3rd, 1.12 4th.
Axles / Sway away short
Differential / threded super diff
Special Modifications / Gusseted case
With some testing in and running in comptetion in my car, the boost was ran at 13 pounds through the gears and around the middle of 4th gear it would climb to 15. The fastes full pass on this set up was a 12.24 and there was a pass that I shut off early in competition that netted a tenth of a second faster in the 1/8th, which I believe would have been a 12.14 pass. MPH hovered around 108.5-108.8. During some testing down at Carlsbad, we were playing with the muffler and turning up the boost and when we got greedy and took it off just to see what it would do, it ran 15 lbs. of boost throught the gears and in 4th, bounced up to 18 so I shut down early and still ran a 12.05 at 100mph.
After 30 passes on the motor, the decision was made to tear down the motor for some check up. For peice of mind, we swaped out the stock rods for some new scat rods.
The new rods
Ready to go in
Turbo and exaust header
Real small ports and stock end castings
heads fresh with a new valve job and all plug holes helicoiled.
New color for the motor
Pictures of the finished car can be found here at http://members.aol.com/jimhage
email jim at Jimhage@aol.com