SCHMITTY
Not enough time
- Joined
- Jun 20, 2012
- Messages
- 1,188
So I have been adjusting my driving habits after switching from a 64/74/14 to a 71/76/.9 t4.
I have been fighting some bad surge . If I fuel the turbo too much it barks at every shift and can even start bucking when I hit lock up.
One of my buddies sent me a custom stiffer afc spring - it helped.
I put a stock fuel plate in - full forward.it helped but it is slower .
My other buddy cut the mwe groove larger from .140" to .245" It helped with around town driving but it will still buck when I hit od/lock up at wide open throttle. That shift happens around 3000 rpm
I have the afc pretty tight. The turbo is lit at 2500 and starts building boost around 1900 -2100 depending on what gear I'm in. With the afc looser it will
Start spooling well at 1900 rpm but it barks and surges badly so I cut fuel back.
I found that manual at higher Rpm's helps big time.
What am I missing ? 5k springs and higher shift points ? Too much air for the cylinder head?
I'm hitting 50 psi max boost right now. Drive pressure seems to be in the 60s - it flutters a little.
Timing is 19*
Stock stall triple disk
5x16s
7mm dv
3.54 gears and stock tires
I have been fighting some bad surge . If I fuel the turbo too much it barks at every shift and can even start bucking when I hit lock up.
One of my buddies sent me a custom stiffer afc spring - it helped.
I put a stock fuel plate in - full forward.it helped but it is slower .
My other buddy cut the mwe groove larger from .140" to .245" It helped with around town driving but it will still buck when I hit od/lock up at wide open throttle. That shift happens around 3000 rpm
I have the afc pretty tight. The turbo is lit at 2500 and starts building boost around 1900 -2100 depending on what gear I'm in. With the afc looser it will
Start spooling well at 1900 rpm but it barks and surges badly so I cut fuel back.
I found that manual at higher Rpm's helps big time.
What am I missing ? 5k springs and higher shift points ? Too much air for the cylinder head?
I'm hitting 50 psi max boost right now. Drive pressure seems to be in the 60s - it flutters a little.
Timing is 19*
Stock stall triple disk
5x16s
7mm dv
3.54 gears and stock tires