Lifter Valley Screen Kits??
10-21-2008 | 11:27 PM
#31
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Joined: Oct 2006
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From: Bradenton Florida
But ,,, whywould if you spray oil on the cam ,,,,,,that make a difrents? shouldnt it be oiled anyways ????
Sorry i did not take the time to read you posts and i am not an engine builder(i wouldnt break all the time if i would be one ) but i found the right person now (which is very very hard) but i can ask him what he thinks.
You have solid rollers ,right ?
I hope you dont run synt. oil, because thats what broke mine ,because the rollers actually jump and hit back on to the cam.?!@#$% Does that make sence the way i sayd that ?????
Thats kind of how i got it explained to me .
Sorry i did not take the time to read you posts and i am not an engine builder(i wouldnt break all the time if i would be one ) but i found the right person now (which is very very hard) but i can ask him what he thinks.
You have solid rollers ,right ?
I hope you dont run synt. oil, because thats what broke mine ,because the rollers actually jump and hit back on to the cam.?!@#$% Does that make sence the way i sayd that ?????
Thats kind of how i got it explained to me .
10-21-2008 | 11:39 PM
#34
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Joined: Oct 2006
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From: Bradenton Florida
What kind of cam , i mean what manufacter ?
Dont tell me ISKY !
10-22-2008 | 08:06 AM
#36
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Joined: Dec 2002
Posts: 2,195
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From: Dallas, TX
Dick,
The plumbing on the Merlin or GM block is easy. You just use a 1/8" bulkhead fitting in the back of the block. One post on here shows that rigging.
Does it do any good? Not sure how to prove the spray bar helps...but it can't hurt and it is inexpensive.
The plumbing on the Merlin or GM block is easy. You just use a 1/8" bulkhead fitting in the back of the block. One post on here shows that rigging.
Does it do any good? Not sure how to prove the spray bar helps...but it can't hurt and it is inexpensive.
10-22-2008 | 02:52 PM
#37
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Charter Member #601
Joined: Dec 2000
Posts: 3,276
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From: Holland, Mi USA.
Ben,
I see what you are saying. Just tap it into the back of the block where that oil line is.. good idea. I know what you are saying.. cheap insurance..
bob,
I am wondering, the big chief heads, do you remember cam specs and spring pressures at that time? Also what kind of rpm are you and were you running with that type of combination. I was running close to 6krpm and maybe the one fast pass I made closer to 6300rpm. I dont know for sure, never saw the tach and my data recorder was not on..
Thanks!
Dick
I see what you are saying. Just tap it into the back of the block where that oil line is.. good idea. I know what you are saying.. cheap insurance..
bob,
I am wondering, the big chief heads, do you remember cam specs and spring pressures at that time? Also what kind of rpm are you and were you running with that type of combination. I was running close to 6krpm and maybe the one fast pass I made closer to 6300rpm. I dont know for sure, never saw the tach and my data recorder was not on..
Thanks!
Dick
10-22-2008 | 08:53 PM
#38
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Joined: Dec 2002
Posts: 2,195
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From: Dallas, TX
Dick,
I was talked to Mike Riley (MRE) today and told him about your valve train issues. To start with, he reminded me that the geometry on a 9.8 BBC block is not great design. Then as you go to the taller deck heights of 10.2 and 10.8, the push rod angle just gets worse...especially for a HP marine application.
I was just looking at this listing in the OSO classifieds and thought it might be of interest. I think a lot of Tommy Hoffstetter and he would be an excellent source of info. If you were interested, he might even take your Merlin block on trade. http://www.offshoreonlyclassifieds.c...o26031-en.html
I was talked to Mike Riley (MRE) today and told him about your valve train issues. To start with, he reminded me that the geometry on a 9.8 BBC block is not great design. Then as you go to the taller deck heights of 10.2 and 10.8, the push rod angle just gets worse...especially for a HP marine application.
I was just looking at this listing in the OSO classifieds and thought it might be of interest. I think a lot of Tommy Hoffstetter and he would be an excellent source of info. If you were interested, he might even take your Merlin block on trade. http://www.offshoreonlyclassifieds.c...o26031-en.html
10-22-2008 | 09:56 PM
#39
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Joined: May 2002
Posts: 1,127
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From: DFW
We are using the spray bar as well....never thought of using magnets,good idea....We also like lifter bore bushings,single taper 3/8 push rods w/.180 wall,shaft rockers and belt drives.
Theory has it,lifter bore bushings lubricate more consistently and if properly installed create a squared hole.The pry bar push rod is thought to create less harmonics as seen on a spin-tron,safeguard deflection and serve somewhat like a rev kit at low RPM. The shaft rocker system is thought to produce more consistent valve train load. In other words,friction from guide plates,friction from temperature effected stud girdles and individual rocker geometry effectively change or increase the spring pressure,expotentialy.....The belt drive is simply more harmonic vibration dampening....CV products has a new belt drive that may be of interest.....Valve spring oilers are another friction control point that may be worth considering.
Theory has it,lifter bore bushings lubricate more consistently and if properly installed create a squared hole.The pry bar push rod is thought to create less harmonics as seen on a spin-tron,safeguard deflection and serve somewhat like a rev kit at low RPM. The shaft rocker system is thought to produce more consistent valve train load. In other words,friction from guide plates,friction from temperature effected stud girdles and individual rocker geometry effectively change or increase the spring pressure,expotentialy.....The belt drive is simply more harmonic vibration dampening....CV products has a new belt drive that may be of interest.....Valve spring oilers are another friction control point that may be worth considering.
10-22-2008 | 10:21 PM
#40
Charter Member #40
Joined: Oct 2000
Posts: 1,255
Likes: 104
From: Cape Coral, FL
Ben, without looking I would imagine the .937 lifter is the severe duty with pin oiling? Man, all lifters go in only one engine? did the other engine not have any failures? Was there a remote chance all 16 were built in the same batch that had some defective bearings? That's nuts!
Dick in the Big Chief they were 14 degree style and ran the offset lifter. They also had the real wide jesel rockers. Tht whole set up was terrible on valve train components. I ran those motors up to 6800. They were Merc class 1 motors with Kinsler EFI. That was when I started using the spray bar, back then the normal offset .842 lifter. I could get to almost 100 hours and pulled the lifters. I have never had one wipe out a roller. I guess I am real lucky!
Dick in the Big Chief they were 14 degree style and ran the offset lifter. They also had the real wide jesel rockers. Tht whole set up was terrible on valve train components. I ran those motors up to 6800. They were Merc class 1 motors with Kinsler EFI. That was when I started using the spray bar, back then the normal offset .842 lifter. I could get to almost 100 hours and pulled the lifters. I have never had one wipe out a roller. I guess I am real lucky!
