chris718

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CHANCE

No longer a Buick guy!!!!!!!!!!!!!
Joined
Jul 13, 2001
Messages
1,567
sorry to bring up an old post of yours but i was wondering if you can send me pics of this set-up
converter charge hole exits the pr valve and pees oil out of the pump and into the converter in the vicinity of the front seal area thru an angled passage .recent testing has shown that installing an allen head set screw and drilling it out to .175" is enough to reduce converter charge psi to 55 psi.we used to crossdrill the hole .100'" to exhaust oil at the back of the pump but this generates increased stall speed from the torque converter due to restricted charge and will increase operating temperature of the transmission and some pumps didnt reduce pressure if the casting port of decrease oil was machined too wide,very common on most 6 bolt 895 /896 combinations with induction heat treated stator tubes.if the car is to use a fixed line pressure the line should be kept to below 170 psi by using an unshimmed stock pr spring (worn out is even better) .we have went even further with this concept by making the only externally adjustable th400 transbrake valve body that uses the modulator valve and a drilled and tapped modulator plug that exerts a force on the modulator valve to raise or lower operating pressure.the clutch apply area in a th400 is capable of running reliably at 160 psi hot with up to 1000 horsepower.keeping crankshaft endplay to the low side of factory specs and doing the mods will ensure trouble free operation with the th400 / 3.8 combination.the thrust area of the crankshaft in inches squared wasnt designed to work with the normal thrust of the th400 converter.then theres this stuff thats needed:http://www.ckperformance.com/resourc...OMPONENTS.html


thanks chris that will be a big help
 
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