[charlie66]

I'm no expert but if your tiger head peaks power anything like a Ehead (I have no clue) which for mine is 34-35 degree's. That would be 10 degrees you took out right? I have a 461 ci with a 150 shot . I don't take out anything . I do take out 4 degrees with a 210 shot though ... Doesn't sound that far off to me. Are you certain your A/F is correct n/a? Do you free flow your regulator to your nitrous jet to 5 psi? Im just sayin, maybe it could be something else then timing?

How do the piston lands/rings look?

[blueghoast]

Originally Posted by charlie66

I'm no expert but if your tiger head peaks power anything like a Ehead (I have no clue) which for mine is 34-35 degree's. That would be 10 degrees you took out right? I have a 461 ci with a 150 shot . I don't take out anything . I do take out 4 degrees with a 210 shot though ... Doesn't sound that far off to me. Are you certain your A/F is correct n/a? Do you free flow your regulator to your nitrous jet to 5 psi? Im just sayin, maybe it could be something else then timing?

How do the piston lands/rings look?

WOW Charlie you don't take any timming out at all even with a 150 shot,
I take out 8* on any shot from 50-325 haven't sprayed any more than
that yet. A friend told me a long time ago with a 125 shot didn't need to
take any timing out so I tried it. Didn't even feel nothing. So I took out 8*
and what a differents. Try 8* on your 150 shot and let me know what you
think.

GT.

[charlie66]

Originally Posted by blueghoast

WOW Charlie you don't take any timming out at all even with a 150 shot,
I take out 8* on any shot from 50-325 haven't sprayed any more than
that yet. A friend told me a long time ago with a 125 shot didn't need to
take any timing out so I tried it. Didn't even feel nothing. So I took out 8*
and what a differents. Try 8* on your 150 shot and let me know what you
think.

GT.

What do you mean you didn't feel anything? So you hit it with a 125 shot and it felt like just motor?

I shot a 210 and took out 4 degrees..

A 150 shot is a baby shot . As long as you have your motor tuned for good AFR and timing on motor with plugs looking good no need to taking any out.. My friend who shoots over 500 told me that , and I tried it and he was right .

With a 150 shot no timing taken out night and day difference in power with my car then N/A.....

[BADDTA]

I think your playing with fire going at it that way. It's not how much you pull from your base timing N/A, it's what your running down the track with a given amount of pph of nitrous. Monte Smith flowed our Big Shot plate and wanted us at no more than 29* going down track with a 150 shot. Our best runs with the E heads N/A is 41* timing. Steve Johnson suggested we start at 28*. We ran at 29* for 8 hits. Then we dropped to 28* and picked up another 1 mph. There were still a couple of plugs that were on the edge with that tune up. We have the Grid installed in the car so we are going to install then ICT fiber optic this winter so we can take out .5 to 1 more degree out of a couple of those cylinders. That "baby shot" put the car on the bumper twice at Norwalk this year. Needless to say we didn't jet up that weekend. We needed to get the suspension under control. We ran 145 mph lifting twice on the last run at 28*. That's with the 150 shot.

What fuel are you running with that 300 shot p4msi1? If it were me I'd be using C23. We are using C12 for the 150 shot.

Brian

[Tom Vaught]

Originally Posted by BADDTA

I think your playing with fire going at it that way. It's not how much you pull from your base timing N/A, it's what your running down the track with a given amount of pph of nitrous. Monte Smith flowed our Big Shot plate and wanted us at no more than 29* going down track with a 150 shot. Our best runs with the E heads N/A is 41* timing. Steve Johnson suggested we start at 28*. We ran at 29* for 8 hits. Then we dropped to 28* and picked up another 1 mph. There were still a couple of plugs that were on the edge with that tune up. That "baby shot" put the car on the bumper twice at Norwalk this year. Needless to say we didn't jet up that weekend. We needed to get the suspension under control. We ran 145 mph lifting twice on the last run at 28*. That's with the 150 shot.

Brian

The magic 27 degrees of timing number (or close to it) also applies to NOS, Charlie. LOL!

Tom V.

[p4msi1]

Originally Posted by BADDTA

I think your playing with fire going at it that way. It's not how much you pull from your base timing N/A, it's what your running down the track with a given amount of pph of nitrous. Monte Smith flowed our Big Shot plate and wanted us at no more than 29* going down track with a 150 shot. Our best runs with the E heads N/A is 41* timing. Steve Johnson suggested we start at 28*. We ran at 29* for 8 hits. Then we dropped to 28* and picked up another 1 mph. There were still a couple of plugs that were on the edge with that tune up. We have the Grid installed in the car so we are going to install then ICT fiber optic this winter so we can take out .5 to 1 more degree out of a couple of those cylinders. That "baby shot" put the car on the bumper twice at Norwalk this year. Needless to say we didn't jet up that weekend. We needed to get the suspension under control. We ran 145 mph lifting twice on the last run at 28*. That's with the 150 shot.

What fuel are you running with that 300 shot p4msi1? If it were me I'd be using C23. We are using C12 for the 150 shot.

Brian

5 gals of c16 and 5 gals of 93 pump gas