A buddy will be porting them for me. He knows what he's doing and he advised me to get bigger valves for extra hp/tq. It'll be an extra $260 for the valve job. Is it worth it? Should I just stick to the porting of the heads and intake?
Getting my gt40's ported. Need advice.
- Thread starter 95Vert
- Start date
blksn955.o
Founding Member
GET A GOOD VALVE JOB. From what I have seen/read/heard the valve job or work is VERY important...esp. with the gt40 family of heads.
The way I had it explained to me is that the better valve job helps make more low lift flow and power since the flow around the valve is improved.
The way I had it explained to me is that the better valve job helps make more low lift flow and power since the flow around the valve is improved.
+1 to blksn. GT40 heads respond extremely well to valve jobs. On stock GT40's, a nice set of valves and a valve job is worth at least 15-20whp and even more torque.
BTW my worked GT40's are still up for grabs. For the money ur gonna spend on port work, valves and valve job, etc you'd be paying about the same for these which have much more extensive work done unless your buddy is cutting you a good deal. Take it easy.
BTW my worked GT40's are still up for grabs. For the money ur gonna spend on port work, valves and valve job, etc you'd be paying about the same for these which have much more extensive work done unless your buddy is cutting you a good deal. Take it easy.
95CobraMike
Active Member
Zero Signal
Active Member
I guess that sounds about right. My machinist charges $12 per cylinder for the valve job + expense of new valves. Then to get the heads milled was $32 each. And assembly with valve stem seals and checked/shimmed springs was $60. Then they paint them before handing them over.
But a valve job is a must when porting and re-building your head. Although it doesn't do some much for high lift, it gives you a really nice low-lift flow boost which will translate to more torque.
But a valve job is a must when porting and re-building your head. Although it doesn't do some much for high lift, it gives you a really nice low-lift flow boost which will translate to more torque.
