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Re: Tore into the engine tonight....**UPDATE**
[Re: stevet340]
#1162356
02/23/12 11:05 AM
02/23/12 11:05 AM
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Joined: Jan 2003
Posts: 2,813
Blue Ridge, VA
Plumb Wired
master
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master
Joined: Jan 2003
Posts: 2,813
Blue Ridge, VA
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Brian, If it helps any I feel your pain and frustration. As you probably know we have issues with our heads as well. I haven't even touched the shortblock yet.  Mike Gray
RIP Monte Smith
aka: OutlawFish
'98 Bickel Dodge Dakota PST
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Re: Tore into the engine tonight....**UPDATE**
[Re: stevet340]
#1162357
02/23/12 02:04 PM
02/23/12 02:04 PM
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Joined: Feb 2003
Posts: 3,456
Out West
408strokerdart
OP
master
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OP
master
Joined: Feb 2003
Posts: 3,456
Out West
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Quote:
I was wondering how long of a valve do you run? What is the installed height? And, you should check you lash more frequently, after every time out, don't be lazy and assume everything is ok. 
I don't know exact length of valve, but I do know they are longer than normal for this head. Spring installed height was around 2.100 (from the build sheet), but actual measurement was around 2.065. This was for a cam that had .737" lift before the .026" lash and rocker arm/push rod deflection, so you can do the math. It was a comp triple spring with about 330# on the seat.
I run lash about every 20 passes. This could easily be one race weekend. I ran lash more often when I ran Harland Sharp rockers. The Jesel's should be better.
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Re: Tore into the engine tonight....**UPDATE**
[Re: Plumb Wired]
#1162358
02/23/12 02:06 PM
02/23/12 02:06 PM
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Joined: Feb 2003
Posts: 3,456
Out West
408strokerdart
OP
master
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OP
master
Joined: Feb 2003
Posts: 3,456
Out West
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Quote:
Brian,
If it helps any I feel your pain and frustration. As you probably know we have issues with our heads as well. I haven't even touched the shortblock yet.
Mike Gray
Yes. I know you are feeling the same pains. I didn't get the "complete" low down on your issues, but I got the jist of it.
We might be able to put our heads together and make one "good" set. 
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Re: Tore into the engine tonight....**UPDATE**
[Re: 408strokerdart]
#1162359
02/23/12 02:13 PM
02/23/12 02:13 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
I Live Here
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I Live Here
Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
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Quote:
Quote:
I was wondering how long of a valve do you run? What is the installed height? And, you should check you lash more frequently, after every time out, don't be lazy and assume everything is ok.
I don't know exact length of valve, but I do know they are longer than normal for this head. Spring installed height was around 2.100 (from the build sheet), but actual measurement was around 2.065. This was for a cam that had .737" lift before the .026" lash and rocker arm/push rod deflection, so you can do the math. It was a comp triple spring with about 330# on the seat.
I run lash about every 20 passes. This could easily be one race weekend. I ran lash more often when I ran Harland Sharp rockers. The Jesel's should be better.
Is that seat pressure really necessary? I am running only .688 lift and mine are set at 240# with a 2.00 installed height. 
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: Tore into the engine tonight....**UPDATE**
[Re: 408strokerdart]
#1162361
02/23/12 03:13 PM
02/23/12 03:13 PM
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Joined: Jan 2003
Posts: 75,066
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,066
U.S.S.A.
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Quote:
Number 1 cylinder is scored and I need to see how bad it is. I am dreading having to re-bore this and buy new pistons for an engine with so few passes.
What about just sleeving that one hole if the piston is still ok ?
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Re: Tore into the engine tonight....**UPDATE**
[Re: JohnRR]
#1162362
02/23/12 03:21 PM
02/23/12 03:21 PM
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Joined: Feb 2003
Posts: 3,456
Out West
408strokerdart
OP
master
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OP
master
Joined: Feb 2003
Posts: 3,456
Out West
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Quote:
Quote:
Number 1 cylinder is scored and I need to see how bad it is. I am dreading having to re-bore this and buy new pistons for an engine with so few passes.
What about just sleeving that one hole if the piston is still ok ?
Waiting on the machine shop....hopefully they will tell me 95% will hone out. If it will, that's what I will do. I have a couple of other lower cost options if required.
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Re: Tore into the engine tonight....**UPDATE**
[Re: dartman366]
#1162363
02/23/12 03:25 PM
02/23/12 03:25 PM
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Joined: Feb 2003
Posts: 3,456
Out West
408strokerdart
OP
master
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OP
master
Joined: Feb 2003
Posts: 3,456
Out West
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Quote:
Quote:
Quote:
I was wondering how long of a valve do you run? What is the installed height? And, you should check you lash more frequently, after every time out, don't be lazy and assume everything is ok.
I don't know exact length of valve, but I do know they are longer than normal for this head. Spring installed height was around 2.100 (from the build sheet), but actual measurement was around 2.065. This was for a cam that had .737" lift before the .026" lash and rocker arm/push rod deflection, so you can do the math. It was a comp triple spring with about 330# on the seat.
I run lash about every 20 passes. This could easily be one race weekend. I ran lash more often when I ran Harland Sharp rockers. The Jesel's should be better.
Is that seat pressure really necessary? I am running only .688 lift and mine are set at 240# with a 2.00 installed height.
I expect the new spring package to be in that range. Probably about 250 to 275 on the seat, installed at 2.00". New cam lobe is undecided at this point, but will probably be somewhere between .765 and .800 lift. Installed height will be set to get somewhere around .070 from coil bind (give or take).
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Re: Tore into the engine tonight....**UPDATE**
[Re: tboomer]
#1162365
02/23/12 05:20 PM
02/23/12 05:20 PM
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Joined: Feb 2003
Posts: 3,456
Out West
408strokerdart
OP
master
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OP
master
Joined: Feb 2003
Posts: 3,456
Out West
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Quote:
No help to ya,Brian...But I wish ya the best of luck! 
Thanks Ted. From what I'm finding and is being corrected, I have no doubt that we will find the 8 second zone this year. It might take near perfect conditions though.
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Re: Tore into the engine tonight....**UPDATE**
[Re: all spooled up]
#1162368
02/23/12 06:07 PM
02/23/12 06:07 PM
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Joined: Feb 2003
Posts: 3,456
Out West
408strokerdart
OP
master
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OP
master
Joined: Feb 2003
Posts: 3,456
Out West
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Quote:
hey that s--ks sorry to her that hows your short block..
We will see when I find the rest of the schrapnel. I think it is going to be ok though.
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Re: Tore into the engine tonight....**UPDATE**
[Re: LA360]
#1162373
02/23/12 10:13 PM
02/23/12 10:13 PM
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Joined: Apr 2007
Posts: 2,028
Trumbull,CT.
jim sciortino
top fuel
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top fuel
Joined: Apr 2007
Posts: 2,028
Trumbull,CT.
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Quote:
Quote:
If it's in the budget to spintron, do it.
I'll never do another engine without it again.
What has time on a spintron set you back?? It would be great info for those reading this post 
We haven't used a spintron on any of our previous builds, but after talking with guys about valvetrain reliability when everything is happy, it will be incorporated into our next build.
Like anything else, there is a cost/benefit, but IMO, for engines that see 8000rpm and up it's beneficial.
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