fuel tune difference 1/8 mile vs 1/4 mile

[Supercat]

Is there a difference in a tuneup 1/4 vs1/8 mile if the only change is the distance.
I do use a high speed bypass in 1/4. I was going to block or jet my high speed for racing 1/8 mile this weekend.
We have run a best 1/8 of 4.88 @149. The car is the one in my builds section. The car is set up for 1/4 .
462" iron Buick , 4 port Hilborn  1/2 pump, pg 1.82 , 3.89 rear , 12x33 Hoiser C09. Car is about 1650 race weight.

Thanks for any guidance

[Spud Miller]

 If you're not making any changes to the car for the 1/8th (gear, tires, etc.) then the high-speed is probably not going to do anything for you. You could try lowering the opening pressure a bit, but generally the problem then is it'll open at the top of low gear which usually isn't what you want.

If you're using a "spring and shim" check valve, it won't really be worth fiddling with in my opinion. The 1/8th mile is just too short for a high-speed lean out to make a big diff.

 Spud

[Supercat]

Thanks Spud. Posted results of today in the "what did you do on your FED today"