If you do change it out, let me know if you notice any difference in gauge operation
(as I have always noticed a difference and it freaks me out).

Put a -4 line to your gauge, and watch the response !

let me re phrase this....
At this point, i would say the best upgrade you could make is to a "flowed" plate Either Induction Solutions Holey Moley or NX RNC billet crossbar. Both plates are very similar. I use the NX plate, but had it flowed. The Holey Moley is a bad A$$ plate and would probably be best thing , as it comes flowed . Both plates are a substantial investment, BUT they are perfect to grow into and you would be way ahead on the tech help that comes with it. Also i am guessing you have no progressive?? eventually your going to hit that wall that it simply doesnt work any more and more HP will just make it harder to hook the car.
Lots of options....but like i said, we all just want that little bit more LOL

No progressive...yet...but it is on the list.

I follow Steve Johnsons Nitrous Tech page on Facebook and have been contemplating the Holey Moley.

Quicker than copper hard line/response more like plastic?
If it is, I'll order one for sure.

And can anyone tell us why the line material would matter (it sure seems to, but I'm not bright enough to figure out why).

Quicker than copper hard line/response more like plastic?
If it is, I'll order one for sure.

And can anyone tell us why the line material would matter (it sure seems to, but I'm not bright enough to figure out why). [/quote]

THE Plastic line is just a hazard, in a fire it will burn and leak oil, just fragile
THe only reason a large line responds better is just that, the pressure change responds quicker because of the larger line, thats all. Its not the material , its the size

let me re phrase this....
At this point, i would say the best upgrade you could make is to a "flowed" plate Either Induction Solutions Holey Moley or NX RNC billet crossbar. Both plates are very similar. I use the NX plate, but had it flowed. The Holey Moley is a bad A$$ plate and would probably be best thing , as it comes flowed . Both plates are a substantial investment, BUT they are perfect to grow into and you would be way ahead on the tech help that comes with it. Also i am guessing you have no progressive?? eventually your going to hit that wall that it simply doesnt work any more and more HP will just make it harder to hook the car.
Lots of options....but like i said, we all just want that little bit more LOL [/quote]

No progressive...yet...but it is on the list.

I follow Steve Johnsons Nitrous Tech page on Facebook and have been contemplating the Holey Moley. [/quote]

Best thing you will ever do ! ! ! Plus he has a pretty good controller also. Make sure you get a controller that will progress your solenoids seperately, (the Edelbrock wont do this) this way you can add fuel and cover early lean spikes. It will make a huge difference, maybe not with small tunes, but bigger tunes it really helps.

Thank you. Will check the ID of copper hard line someday to compare. Makes sense, it's probably smaller than plastic.

I have not used plastic in years, but when I switched to copper I didn't like how the gauge reacted.

Thanks for tolerating yet another hijack, Mark. Have I told you lately you are the man?

LOL! I'm learning about that too, Rich!

I had a plastic line split right after an engine build years ago and hose down a header. Definitely needs attention on this car.

I was told by NHRA tech years ago that they didn't, won't, allow plastic pressures lines on oil or fuel gauges.
I have used a 1/4 inch I.D. oil pressure line and it does make a large difference on the oil pressure gauge responding time , NHRA made me change that back to the smaller 1/8 inch tubing also
Their thinking was if it broke during a run it would put a lot more oil on the track during a run

what about a -3 braided line ? isn't that 3/16", halfway between the 1/8 and 1/4" copper ?
that should be quicker reacting for the gauge than 1/8, and not much slower than the 1/4".