PI Swap Dyno Results

[hotmustang331]

Yea my old GT made 292RWHP with boltons, VT stg 1 cams, and stock lower PI intake. His #s are right on.

And NICE #s OP!

 

[CobraRed_96_GT]

whats bs about it?

my headswap car put down 279/314, with stock exhaust manifolds, a light cleanup job on the intake side of the heads, stock valves, and no tune

his car put down 20 more hp with oversized valves, LT headers, and a tune. Its very believable.

Theres a couple Stock PI motor, non headswap cars, putting down 300+rwhp with the stock PI intake, cams and bolt ons. This of coarse, is with stock PI heads.

Don't forget comp 262 cams, his numbers are plenty feasible.

 

[bluestang96]

Here is the graph from the dyno:

 

[Winters98GT]

damn db post

 

[Winters98GT]

no way, I want to see a dyno sheet.

did you have any issues with PTV clearance with the oversized valves?

 

[bluestang96]

did you have any issues with PTV clearance with the oversized valves?

No there were no PTV issues at all. Actually you can some clearance becuase the oversized valves are flat faced as compared to the stock valves that have a protuding ring on the face. On the other side of the coin the distance between the valve and cylinder wall is decreased but I havent heard or seen any problems that could be directly linked just from having oversized valves when nothing else was changed in a setup.

 

[CobraRed_96_GT]

No there were no PTV issues at all. Actually you can some clearance becuase the oversized valves are flat faced as compared to the stock valves that have a protuding ring on the face. On the other side of the coin the distance between the valve and cylinder wall is decreased but I havent heard or seen any problems that could be directly linked just from having oversized valves when nothing else was changed in a setup.

it's not a potruding ring, its the face of the valve where it seats that you grind on - it looks like a ring because the valve is dished

 

[bluestang96]

it's not a potruding ring, its the face of the valve where it seats that you grind on - it looks like a ring because the valve is dished

Right, I guess the dish just reminds me of a protrusion. But regardless some clearance is gained in one area and lost in another.

 

[Winters98GT]

sweet, good thread, good numbers, and good info in here.