355 LE Dyno tune this Friday...Guess my numbers
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Joined: Aug 2005
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From: Kantuckee Yo'
damn speed demon If I knew your cam was going to be such a problem.... Any way it pulls to 6800 on my car.... NO tune, stock 24lb fuel system. The plugs look a little lean, but the car pulls hard. The motor has approx 400 miles as of yet I will keep a close look out on the behavior fo the motor now. Art
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Joined: Jun 2006
Posts: 2,092
From: lakeville, pa
damn speed demon If I knew your cam was going to be such a problem.... Any way it pulls to 6800 on my car.... NO tune, stock 24lb fuel system. The plugs look a little lean, but the car pulls hard. The motor has approx 400 miles as of yet I will keep a close look out on the behavior fo the motor now. Art
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Joined: Mar 2002
Posts: 3,245
From: Ocala, Florida
The golds are a good bit stronger than the beehives. I want to avoid overdoing things any more than at all possible even if it costs another set. Things are overdone enough right now.
Again I can see the float in the Datamaster logs and I can check #1 cylinder's spring pressures and have the car back together in 20 minutes. If I have to check the 3-4 times a year so be it to ensure things hold up.
If the my beehives were simply just slightly under par for my combonation of components then the golds should provide the valve control I need. Thats the plan right now. The Comp 921 KIT I got for free, I might make $600.00. These spring swaps are costing me nothing but my time.
Again I can see the float in the Datamaster logs and I can check #1 cylinder's spring pressures and have the car back together in 20 minutes. If I have to check the 3-4 times a year so be it to ensure things hold up.
If the my beehives were simply just slightly under par for my combonation of components then the golds should provide the valve control I need. Thats the plan right now. The Comp 921 KIT I got for free, I might make $600.00. These spring swaps are costing me nothing but my time.
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Joined: Feb 2003
Posts: 2,639
From: Mooresville, NC
Well we have tapped every angle to every valve related topic in this thread but this one, so here goes.
I cant see the weight of the spring being as much a concern as a moving object like the lifter, push rod, rocker and valve. The spring does not really reciprocate in the same manner as those components. I would even tend to think that springs factor little into the equation in terms of weight. The acceleration and decel forces seem to be to me much different. The whole inertia law seems different.
Maybe I am wrong.
I cant see the weight of the spring being as much a concern as a moving object like the lifter, push rod, rocker and valve. The spring does not really reciprocate in the same manner as those components. I would even tend to think that springs factor little into the equation in terms of weight. The acceleration and decel forces seem to be to me much different. The whole inertia law seems different.
Maybe I am wrong.
The weight on the cam side of rocker is nowhere near as important as the valve side, so don't be worried too much with lifter or pushrod weights.
With the beehives, you have a smaller retainer than regular springs PLUS the top coils are smaller then typical springs and that is the part of the spring that is constantly moving, therefore equaling less weight moving.
Last edited by marshall93z; Apr 3, 2008 at 10:25 PM.
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Joined: Apr 2004
Posts: 144
From: mobile al
re
wrd1972 I am running nsa pro mag 1.6 with springs that were on the heads when I got them, uuuhhh so I don't know. Traded a motor that went 10.40 for these heads and cash. I just wanted to put something on that should be real fun. If the springs wear out I guess this will be real fun.Art
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Thread Starter
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Joined: Aug 2005
Posts: 4,405
From: Kantuckee Yo'
Update:
I installed the PSI LS1511ML beehives at 1.765" install height. Pressures are 130#/360#.
Went out and hammered on it and logged everything on datamaster.
NO IMPROVEMENT PERIOD.
The AFGS is still falling off at 6K RPM and the motor sounds very rough. Drop under 6K then everything is golden.
Lloyd and Brett state that the PAC 1218's are sufficient with this cam setup at 1.750". The PSI's are stronger especially open so it appears that even more pressure is needed.
Next options to consider short of replacing the cam are dropping to 1.5 ratio rockers to get the lift down to the .560's, installing a rev kit, pray for a miracle. This makes no damn sense. Again Brett and lloyd claim this works and there are guys on this board running the same cam with no issues.
I installed the PSI LS1511ML beehives at 1.765" install height. Pressures are 130#/360#.
Went out and hammered on it and logged everything on datamaster.
NO IMPROVEMENT PERIOD.
The AFGS is still falling off at 6K RPM and the motor sounds very rough. Drop under 6K then everything is golden.
Lloyd and Brett state that the PAC 1218's are sufficient with this cam setup at 1.750". The PSI's are stronger especially open so it appears that even more pressure is needed.
Next options to consider short of replacing the cam are dropping to 1.5 ratio rockers to get the lift down to the .560's, installing a rev kit, pray for a miracle. This makes no damn sense. Again Brett and lloyd claim this works and there are guys on this board running the same cam with no issues.
Last edited by wrd1972; Apr 27, 2008 at 07:09 AM.
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Joined: Feb 2004
Posts: 4,800
Like I said on the other forum the springs you used are stronger over the nose but weaker on the seat and it is possible to bounce the valve off the seat so there is still possibility it is float.
If you have access to a set of 1.5s that would be probably the easiest way to check it.
If you have access to a set of 1.5s that would be probably the easiest way to check it.
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Joined: Apr 2006
Posts: 1,083
From: O'Fallon, MO
Here's something to look into. I thought I had a valve float problem. Tried reshimming the valve springs amongst a few other things. Nothing worked. Finally one day I thought I had bent a valve. I put air in the cylinder that I thought was affected, and you could hear air coming back through the intake. Pulled the head knowing I had a bent valve, took it to the local machine shop. No bent valve. The heads had been machined wrong when I had them ported, and the valves weren't sealing properly. The valve seats had been machined off center to the valves. CNC Cylinder HEADS was the original head porter.
I wouldn't hurt to do a leakdown test on a few cylinders, to eliminate the possibilty of a case of bad machining.
I wouldn't hurt to do a leakdown test on a few cylinders, to eliminate the possibilty of a case of bad machining.