procharged 4l80e
procharged 4l80e I have a 490 BBC with a procharger f1 with 18psi right now looking for 20-22 this sat. On dyno ( STREET DRIVEN)
I have a locally built race 4l80e. Full manual, vacuum controlled line pressure
We notice last weekend the tranny pan was leaking pretty good when we under a full run on the dyno
The vacuum line runs from the throttle body to the tranny and in-between the two there is a 3/8 t fitting that has a check valve so the boost pressure supposable don’t pressurize the tranny is that 3/8 line big enough to let out 18psi let alone 20ts I thought about putting two check valves in but I also do not want to lose boost through them how ever much would go through two 3/8 holes
If it is pressurizing the tranny can I delete the vacuum line completely or will it hurt the tranny some how street driving or racing the truck thanks for any advice
I have a locally built race 4l80e. Full manual, vacuum controlled line pressure
We notice last weekend the tranny pan was leaking pretty good when we under a full run on the dyno
The vacuum line runs from the throttle body to the tranny and in-between the two there is a 3/8 t fitting that has a check valve so the boost pressure supposable don’t pressurize the tranny is that 3/8 line big enough to let out 18psi let alone 20ts I thought about putting two check valves in but I also do not want to lose boost through them how ever much would go through two 3/8 holes
If it is pressurizing the tranny can I delete the vacuum line completely or will it hurt the tranny some how street driving or racing the truck thanks for any advice
Do you have an actual check valve or the little bleed off check valve from transgo? I thought about installing a reagular check valve. After testing the check valve, once you pull a vaccum on the check vavle, you keep a vaccum on it. The valve checks back to the engine and once your in boost the vaccum is held in by the check. I ordered the accual check valve from trans go whick is basically a ball that checks under vaccum, but releases to the atmosphere under boost. If that makes sense. ??
i kind of wondered about using a ck valve on a vac mod., because the mod would keep seeing the vac, because the ck valve would hold it-makes sense if there was some way to release it
on my turbo 400, i use the vac mod w/o a ck valve, and seems to work fine-how much boost it can take not sure, i have run 14 lbs w/o a problem, and in the past run over 20 on another one-i remember, B & M i think, used to offer a mech mod for boosted engines
getting ready to do a man. 4l80e, so im curious how you make out using the valve
on my turbo 400, i use the vac mod w/o a ck valve, and seems to work fine-how much boost it can take not sure, i have run 14 lbs w/o a problem, and in the past run over 20 on another one-i remember, B & M i think, used to offer a mech mod for boosted engines
getting ready to do a man. 4l80e, so im curious how you make out using the valve
the transgo check valve actually has a ball in it
the design of the check valve is a BIG T. the t is upside down and the ball is in the top vacuum holds the ball closed (down) and under boost it pushes up to serten point to let the pres. out but I do not know if the one is enough for my 18psi now and 20-22 later
the design of the check valve is a BIG T. the t is upside down and the ball is in the top vacuum holds the ball closed (down) and under boost it pushes up to serten point to let the pres. out but I do not know if the one is enough for my 18psi now and 20-22 later
