Valve Body Mod
09-12-2000, 04:35 PM
#2
From Don's email ---------->Long
"Modification
The VB modification is performed outside of the vehicle. The modification is done by changing the inner workings of the Valvebody. The changes actually increase fluid line pressure and re-route fluid. Soft springs are replaced with stiffer, harder springs. All gaskets are replaced with OEM Nissan parts.
What’s it mean?
What we are changing is the speed of the shifts between 1-2 and again between 2-3. The speed and firmness of the shifts are changed. That normal sloppy slow transition you experience now is fine for a smooth quiet shift (like a luxury car should be). But if you’re like me, you want every little bit of power robbing, energy-absorbing thing out of your car. That’s exactly what the OEM ValveBody does…rob you of precious power. You are losing power with every shift you make. I’ve increased my ¼ mile times by 6 tenths just with this modification. Your shifts are faster than a 5-speed (you’ll never miss one), and, at full throttle, hard enough to skip your CD player. Normal driving will be firm not sloppy, but will not snap your head back like full throttle.
Longevity
When I did my ValveBody modification almost two years ago, it was to increase the life of my slowly dying automatic transmission. After some track time with my NOS, I slowly started to feel some of the shifting fade away. I knew at that point my transmission was in its final days. At that point I had nothing to lose with my transmission so I went inside, looked around, and did some experimenting. After 3 weeks, 100 gallons of transmission fluid and $200 in OEM gaskets I found the right combination. That was TWO years ago. I just recently (August ’99) swapped out my original transmission for the I30t VLSD (that’s another story). After the Valvebody changes I went almost two more drag-racing seasons and one autocross season. If you know who I am, then you know I’ve run this car hard. It really helps increase the longevity of your automatic. I cannot guarantee this will fix any existing transmission failures or shortcomings, but it did in my case."
The VB modification is performed outside of the vehicle. The modification is done by changing the inner workings of the Valvebody. The changes actually increase fluid line pressure and re-route fluid. Soft springs are replaced with stiffer, harder springs. All gaskets are replaced with OEM Nissan parts.
What’s it mean?
What we are changing is the speed of the shifts between 1-2 and again between 2-3. The speed and firmness of the shifts are changed. That normal sloppy slow transition you experience now is fine for a smooth quiet shift (like a luxury car should be). But if you’re like me, you want every little bit of power robbing, energy-absorbing thing out of your car. That’s exactly what the OEM ValveBody does…rob you of precious power. You are losing power with every shift you make. I’ve increased my ¼ mile times by 6 tenths just with this modification. Your shifts are faster than a 5-speed (you’ll never miss one), and, at full throttle, hard enough to skip your CD player. Normal driving will be firm not sloppy, but will not snap your head back like full throttle.
Longevity
When I did my ValveBody modification almost two years ago, it was to increase the life of my slowly dying automatic transmission. After some track time with my NOS, I slowly started to feel some of the shifting fade away. I knew at that point my transmission was in its final days. At that point I had nothing to lose with my transmission so I went inside, looked around, and did some experimenting. After 3 weeks, 100 gallons of transmission fluid and $200 in OEM gaskets I found the right combination. That was TWO years ago. I just recently (August ’99) swapped out my original transmission for the I30t VLSD (that’s another story). After the Valvebody changes I went almost two more drag-racing seasons and one autocross season. If you know who I am, then you know I’ve run this car hard. It really helps increase the longevity of your automatic. I cannot guarantee this will fix any existing transmission failures or shortcomings, but it did in my case."
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