Got my P51s ported -- headed back to the track

Hopefully I will be at the next Friday night race at Famoso on 9/7 if its not too hot. Picked up 40 cfm on the exhaust side and intake numbers look great as well as I went with some 2.300 titanium intake valves. But the real test will be the Ets at the track!

A big thank you to Charlie Evans. He shipped out the heads while I was in Montana, before he even got my check for the work. Was easy and great to work with.

Here are some pictures. I put the motor back together yesterday afternoon while watching the YB Nationals on the live feed.

look just like mine.........

good luck , cant wait to see the improvements

They didn't come with a cape though.

richter69 wrote:look just like mine.........

Are you running the shaft rockers too Jon?

psfracer wrote:They didn't come with a cape though.

Don't worry... The cape is awarded after the first run!

dfree383 wrote:

psfracer wrote:They didn't come with a cape though.

Don't worry... The cape is awarded after the first run!

he may need something to wipe his ass on!

AZFairlane wrote:

richter69 wrote:look just like mine.........

Are you running the shaft rockers too Jon?

no, stud mounts fo me.

So car is back together and running. I used the flow tool I got and discovered that I was actually running 9.5 psi fuel pressure for the nitrous system when I was at Tenn. I am going to drop it to 7 psi and go from there.

I took a reading from right after the regulator and the big gauge was showing 2.5 psi more then the piece of crap 1 1/2 inch gauge. So much for accuracy. Its an aeromotive gauge to.

did you do a cam change ??

which flow tool you have now?

2.5 pounds is huge, I'm surprised it was running as good as it did on spray with that much FP.

bruno wrote:did you do a cam change ??

No, still running the 282 / 296 @ .050 duration, .773 / .749 lift cam on a 112 lobe center.

richter69 wrote:which flow tool you have now?

This one. Its 5 inches across, its bigger then I thought it would be.

Barney wrote:2.5 pounds is huge, I'm surprised it was running as good as it did on spray with that much FP.

See--thats the thing, it only went 5.89 on a 150 shot, where here at home its gone 6.0Xs on motor all the time. So I knew something was off, but I thought it was just the heat and the 150 degree track temps.

psfracer wrote:

richter69 wrote:which flow tool you have now?

This one:

Barney wrote:2.5 pounds is huge, I'm surprised it was running as good as it did on spray with that much FP.

See--thats the thing, it only went 5.89 on a 150 shot, where here at home its gone 6.0Xs on motor all the time. So I knew something was off, but I thought it was just the heat and the 150 degree track temps.

A lot of us were baffled that day. Hopefully it will really pick up now that you got it dialed in.

yeah i dunno, i put green oil back in mine, changed the plate, and the fuel.......... went from a 50 to a 23 so go figure...... and picked up 5 mph.......this was is near same da........I thought TVRP was shit but now Im not so sure.


what jet are you using in your flow tool? I had one I made but it was fluttering real bad, I bought a new reg and one of those big ass flow tools from I-S, I checked my old reg and it was dead on where my old tool showed and the fluttering stopped lol. I went ahead and swapped the reg and put the other in the trailer for a spare. The quick disconnect on the I-S tool is awesome.

a 73 jet is in the flow tool. Should I flow it without it? I could see what difference it makes.

Should I hook it up closer to the distribution block or right at the regulator?

Cool--so next year if one of my regulators goes out, I know where to go. To the FABIO PARTS TRAILER.

Just set it with the 73 and you'll be fine.

yep use the 73.

at the reg is fine

what is yout tune in the fogger ? still sounds way rich at 7 lbs ...and yes flow with a 73 jet after the reg

Yeah, the tune that was given to me, 7 psi was to be the starting point so I didn't burn anything up. So we will see what happens. I plan on starting at 7 then reading the plugs.

What do most people run? A 4 size spread (24-20) and 6 psi? That is what I hear most often.

let the plugs and timeslip tell you what it wants.

I use a 4 jet on the smaller tunes( below 28) and a six jet spread for larger tunes ( over 28 ). You will probably end up between 5 1/4 and 5 3/4 fp when all is said and done. As far as jet spread goes I think every one and every different combo is a little different.

Where'd you get that flow tool from? It's got a McDaniel gauge on it. They're local to me and manufacture good stuff.

psfracer wrote:Yeah, the tune that was given to me, 7 psi was to be the starting point so I didn't burn anything up. So we will see what happens. I plan on starting at 7 then reading the plugs.

What do most people run? A 4 size spread (24-20) and 6 psi? That is what I hear most often.

i know you have your tuneups already but , tell Steve that you are from 429-460.com and he will give you a better tune to start your baseline .......running rich is going to cause more harm then good .....imo