did bob tasca III snooker matt hagen (2 Viewers)

[Bross Hawg]

It looked like it smoked #3 on the run in the first round, and for whatever reason, the head that was on that side for both runs might not flow as well. It could be something as simple as the jetting was off in the head.

Being that the heads are CNC machined and accurate to within .001", how would that be the case? I would believe a jetting issue, everyone makes mistakes...or the tuneup was just off and someone is looking to blame a part...

As far as the staging "duel" when both cars are in the prestage beams and neither one is in the stage beam, the clutch pedal is depressed and the clutch is not making much heat. They step off the pedal when they roll in to stage and stay off the pedal, the clutch discs are then slipping. If someone was to stage, then the other person took, say, 6 seconds to roll in...that would be an issue. The only issue with what happened Sunday was amount of fuel burned (they are still burning 50 GPM on one stage of pump in prestage) and mental errors...

 

[Bross Hawg]

Are and/or how are jet orifices measured?

You can use # or Letter drill bits...use a micrometer to check the drill bit that fits the oriface snuggly. I have seen them mismarked. ALL parts should be verified before using....

 

[n/a]

Are and/or how are jet orifices measured?

There is a device designed to measure the hole size. Can’t recall the manufacture. The bit method takes too long.

Another part in the head that can cause problems is the nozzles.

 

[flapjack]

There is a device designed to measure the hole size. Can’t recall the manufacture. The bit method takes too long.

Maybe this:

http://www.ppe.com/10cat/0238.pdf

 

[MM]

Are and/or how are jet orifices measured?

I use a hole gauge. I always check them before I put them in the head. Sometimes a jet that is marked .075 will actually measure out to be as small as .071 or visa versa. Doesn't seem like alot but it can cause you a lot of problems

 

[FuelFan13]

Are and/or how are jet orifices measured?

You can flow them or even grade them with a leakdown tester. Can't always trust the numbers stamped on them.

 

[funnycarguy]

Everything is flowed on the nostalgia car I work on. When you make a .001 it needs to be a .001 change. Lots of nozzles are .002 different from marked. As Mike knows nitro nozzles are way bigger than alcohol. If you don't run a million runs....sometimes you just take a SWAG but the hole goes fat or lean. On nitro you have lots of nozzles feeding every cylinder and making changes can be a bit of an experiment. Pro cars have 104 gpm worth of pump. And it's all about volume!!

 

[SundayNiagara]

Mark, you from Wisconsin? You seem to have a lot of cheese to hand out around the mater today???

The reasons are quite obvious!

 

[SundayNiagara]

I bet that is awesome....

Best pizza's in WNY are made with it. However, there is a store down here, in Hollywood that sells it to people who have a craving for Buffalo food.