Nothing too exciting to talk about yet had some problems...
Thread Starter
Joined: Nov 2001
Posts: 45,333
Likes: 1,768
From: Chicago, IL
Nothing too exciting to talk about yet had some problems... I ran my 98 Formula about two weeks ago, picked it right up from Speed Inc. and went right to the track. Track was super crowded and some folks oiled down the track a few times, so I only got one hit in.... that was an low 11 second pass lifting up top because my car moved around where there was still some coolant.
Ran it today, and only got one run in (low 11 @ 127). I botched up the launch, I was a bit distracted thinking about this noise I was hearing. but I spent like $160 to be there so I made a hit. Anyway, a few friends convinced me to pull the valve covers. Found that a pushrod on the driver's side had gotten next to the rocker (Y/T 1.7). Pulled the rocker, pushrod was fine. One corner of the rocker had been beat up by the pushrod but the 'cup' was fine. Put it all back together with the help of Danimal95 and it was missing. We think it has a bent valve. The metallic noise is gone, but now the car is missing. I am wondering if I found the limits of the Y/T 1.7's. I was taking the car up to 7000-7100.
Anyway, not sure I can get the car out again this year unless I can get the head pulled ASAP.
Had a nice time seeing a lot of friends at GLD; hopefully next time I can make a clean hit and run a respectable time.
John
Ran it today, and only got one run in (low 11 @ 127). I botched up the launch, I was a bit distracted thinking about this noise I was hearing. but I spent like $160 to be there so I made a hit. Anyway, a few friends convinced me to pull the valve covers. Found that a pushrod on the driver's side had gotten next to the rocker (Y/T 1.7). Pulled the rocker, pushrod was fine. One corner of the rocker had been beat up by the pushrod but the 'cup' was fine. Put it all back together with the help of Danimal95 and it was missing. We think it has a bent valve. The metallic noise is gone, but now the car is missing. I am wondering if I found the limits of the Y/T 1.7's. I was taking the car up to 7000-7100.
Anyway, not sure I can get the car out again this year unless I can get the head pulled ASAP.
Had a nice time seeing a lot of friends at GLD; hopefully next time I can make a clean hit and run a respectable time.
John
Dpnt ya love all teh million last minute problems that keep ya from gettin it to 100%. I hope u get them of and get it fixed as u will be kickin urself all winter if u only get a 11 sec pass. GL John
John
John
Thread Starter
Joined: Nov 2001
Posts: 45,333
Likes: 1,768
From: Chicago, IL
I'm very willing to fix it and go run again, I like racing. I'm researching this valvetrain issue but at a minimum will be switching to different rockers, I don't see how the pushrod got out from under the rocker.
I wouldn't expect the YT's to fail at only 7100. Heck, I've pulled my stock rockers to 7200 on many occasions. The YT's are heavier though, maybe you're running out of spring and getting excessive lash in there? Pretty hard to pop the pushrod out otherwise.
Thread Starter
Joined: Nov 2001
Posts: 45,333
Likes: 1,768
From: Chicago, IL
I'm running a lot of spring pressure (on my AllPro heads), I'm kind of thinking that the lifters are the culprit and that maybe even one of them is collapsed. It happened right after I made a 2step hit. I remember reading in a thread somewhere where someone said that if the engine runs raggedy after a pass maybe the lifters bled down or something, I wish I could remember the link. My reccollection is that I am running Comp OE style lifters, not R's.
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Thread Starter
Joined: Nov 2001
Posts: 45,333
Likes: 1,768
From: Chicago, IL
The Speed Inc. guys said the stock rockers would not work with the AllPros. Be that as it may, I am planning to change rockers and possibly lifters too.
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Verdad Gallardo Thread Starter
Joined: Nov 2001
Posts: 45,333
Likes: 1,768
From: Chicago, IL
Originally Posted by LSs1Power
How do u like the ALLPro heads?
Agreed on the YTs being junk but that most likely didnt cause your problems.
My lifters bleed down after every pass, I guess after eight years they are getting worn out
They clatter and the car runs like crap for a couple minutes, original stock 98 rockers/pushrods/lifters @ 7000rpm..
My lifters bleed down after every pass, I guess after eight years they are getting worn out
They clatter and the car runs like crap for a couple minutes, original stock 98 rockers/pushrods/lifters @ 7000rpm.. 
Originally Posted by Pro Stock John
Well they have seen 26psi. If I pull the heads, we will be able to see how the MLS head gaskets are doing.
Do u know what they flow? Im thinking about getting heads on my new setup and Im lost between TFS, AFR and AllPro.
that sucks to hear. So, officially my C6 is still quicker than your current drag car? 
slap some stock rocker arms back on it (if they work) and make sure your lifter preload is set properly.
slap some stock rocker arms back on it (if they work) and make sure your lifter preload is set properly.
I only use the stock rockers with the harland sharp bearing mod. I reconmend that to everyone. Its the best insurance policy And for $250.00 +shipping you cant go wrong!
And for $250.00 +shipping you cant go wrong! 
Originally Posted by 99SS-T
Dpnt ya love all teh million last minute problems that keep ya from gettin it to 100%. I hope u get them of and get it fixed as u will be kickin urself all winter if u only get a 11 sec pass. GL John
John
John
Pat dont make me come over there!!! lol. I am at my rents house in pa and they have black keys on the keyboard. So when i post at night im goin off memory and when i **** up like that i cant see the damn letters to figure out wtf to fix.
So yes the post is in english, and it describes in detail, how to make roast duck in a nice reduction sauce.....
John
So yes the post is in english, and it describes in detail, how to make roast duck in a nice reduction sauce.....
John
Originally Posted by 99SS-T
Pat dont make me come over there!!! lol. I am at my rents house in pa and they have black keys on the keyboard. So when i post at night im goin off memory and when i **** up like that i cant see the damn letters to figure out wtf to fix.
So yes the post is in english, and it describes in detail, how to make roast duck in a nice reduction sauce.....
John
So yes the post is in english, and it describes in detail, how to make roast duck in a nice reduction sauce.....
John
