I know it varies some but the 4wd models are between 20 to 23% and the 2wd models are between 18 and 21% drive train loss

 

So i just had an idea and i would like you pro’s to tell me what you think about this.

So when i had the heads off i checked my valve seals right. What i did was this; i filled the combustion chamber with water(with a plug of sorts in the spark plug hole) then i fashioned a ruber plug to fit over my intake port and i pumped 120 psi of air up theough the thing. I marked the ones that leaked(which i might add was all of the exhaust valves and several of the intake ones) then i used lapping compound and made them all seal nice. One of my valves(the first one i did) i way over did it their was a grove in the valve seat.. it was bad. This thought never crossed my mind until just now.. do you think this could be adversely effecting my HP significantly?

 

Any thoughts on the vales guys?

If i got to rip the heads off again to do a valve job I think i will trow in some 2” intake valves. Would that be a worth wile venture? What kind of gains could that bring to the table?

 

Do a compression and leak down test if you think it's a problem.

A bad valve job would show lower compression.

 

I gon't think the 1 bad valve seat would hurt you much.
I think the 243/799 has the 2" int valves, but the port
was made bigger to take advantage of it.

 

Ok so i did the compression test and I am seeing 190 psi for the compression. This is more then my cam manufacturer(howards) said i should have but i assume that is because i milled the heads do .020. I dont know for sure, what are your thoughts?

I still need to test for leak down.. i will do that as soon as i have time(maybe this weekend)

 

Additionally, i just did a dry test.. i will do the test where you pour oil in the plug holes tomorrow unless you guys think it is a waste of time

 

Did you do a before dyno run on the on that dyno before all the work you did? Does it feel the same as stock or better? I have a 5.3 with tsp 5.3 heads and a 222/226 115+3 .600 lift and with 8.1 injectors i was in the 85-90% range at WOT just for a comparison for you.

 

No I never had it dyno’ed before the work. To be honest with you i really do not notice much difference. It may reach 90 mph a little quicker, but not a whole lot. It certainly did not live up to expectations though.

That is nuts man.. apparently i am only using 69% of my stock injectors.

 

So i finished the compression test the proper way today. I wasnt holding down the gas pedal yesterday. Here are the results in firing order

200, 200, 198, 200, 202, 198, 202, 200

Based on my research, that is all within tolerance but it does seem awfully high. I assume this is because of my milled heads. Do that sound right to you guys? Is that to high? Pretty awesome a lower end with a quarter million miles on it has such good compression, I am just not sure if that is to much