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Rich Biebel · 02-20-2010, 06:24 PM

Quote from Mr Drooze....

"Tapped a valve yesterday cant get a new one in or other heads I have done till monday. (Im having a Ford Prostock guy do my heads Ironic eh....(and NO no cutting to the castings, 0 none....lol) No biggie like a .005 bang, I just dont have an abundance of spares yet. It could be cut straight if it was an intake Id consider it, but not an exhaust. looks like a tight guide and a bit of stem warpage hung it full open and a back smack , piston all good, and just a hair of a bend, we found it while doing a CR check and leakdown test through the tuning process. for a baseline. 3rd check I think"

So just let me get this correct......this is your second engine..........It came from a proffessional engine shop or builder and now it has a bent exhaust valve after some test running? You are guessing it came from a tight guide or a valve stem that was warped? The heads are off and your getting it fixed.......

Race engines generally have some type of bronze guides and they rarely seize. Steel or iron guides also work but the clearance needs to right and seals might not be used by some to allow some oil in there. Exhaust need to be looser from the heat........If one valve did it what makes you think it won't happen again on another one.....If a valve seized or started to drag even momentarily it will almost cetainly have some discoloration or metal transfer on the stem........Bottom line is if your valves hit your pistons your going to be hurting another engine.....

As far as Chassis Certs and various rules.....

Stockers don't need some things even bracket cars do going strictly by ET's the car runs. It's a foolish way to write the rules. If you go to your local track just to make some runs during a bracket race...you will need to meet the rules by your ET's for bracket racing.....

So even though your car may run in th 9's and not need a sticker to race in Stock at an NHRA race.

If you do that at your local track you will need to meet all the rules to run in the 9's
Chassis cert. safety gear and a license.....

02-20-2010, 06:24 PM	#7
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,315 Likes: 25 Liked 544 Times in 213 Posts	Re: Challenger Drag Pak Owners Quote from Mr Drooze.... "Tapped a valve yesterday cant get a new one in or other heads I have done till monday. (Im having a Ford Prostock guy do my heads Ironic eh....(and NO no cutting to the castings, 0 none....lol) No biggie like a .005 bang, I just dont have an abundance of spares yet. It could be cut straight if it was an intake Id consider it, but not an exhaust. looks like a tight guide and a bit of stem warpage hung it full open and a back smack , piston all good, and just a hair of a bend, we found it while doing a CR check and leakdown test through the tuning process. for a baseline. 3rd check I think" So just let me get this correct......this is your second engine..........It came from a proffessional engine shop or builder and now it has a bent exhaust valve after some test running? You are guessing it came from a tight guide or a valve stem that was warped? The heads are off and your getting it fixed....... Race engines generally have some type of bronze guides and they rarely seize. Steel or iron guides also work but the clearance needs to right and seals might not be used by some to allow some oil in there. Exhaust need to be looser from the heat........If one valve did it what makes you think it won't happen again on another one.....If a valve seized or started to drag even momentarily it will almost cetainly have some discoloration or metal transfer on the stem........Bottom line is if your valves hit your pistons your going to be hurting another engine..... As far as Chassis Certs and various rules..... Stockers don't need some things even bracket cars do going strictly by ET's the car runs. It's a foolish way to write the rules. If you go to your local track just to make some runs during a bracket race...you will need to meet the rules by your ET's for bracket racing..... So even though your car may run in th 9's and not need a sticker to race in Stock at an NHRA race. If you do that at your local track you will need to meet all the rules to run in the 9's Chassis cert. safety gear and a license..... __________________ Rich Biebel S/C 1479 Stock 147R Last edited by Rich Biebel; 02-20-2010 at 06:38 PM.