Build -Need Suggestions
#12
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A double roller needs to be machined to correct the Austrailian chamfer vs US chamfer on the crank gear and the cam gear needs to be matched up as well. That way the chain has no clearnace issues to the oil pump cover. At first folks figured the cover clearance issue was a simple clearance problem from a larger gear set, in reality it was the chain not being aligned on the gears properly.
Dropping the subframe, it'* possible to do this in around a day. Do a couple of oil changes at 3-5 minutes of running and then 10-20 minutes of running. It'* good practice as some water, dirt and assembly lube will be in the oil.
A fourth clutch hub won't really help breathe new life into the trans. It will help ensure you don't lose 4th gear though. To help that in the meantime, don't go WOT when you are in 4th. Pull back down to 3rd manually and then go WOT. That way the added stress before the trans would normally downshift isn't loaded onto the 4th shaft.
#14
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I ran a stock chain with 90lb springs and a mild cam for around 80k. The first 15k I had stock retainers (do not do this) so I had about 120ish lb seat pressure for that long.
The tensioner had the typical failed bottom portion where it cracks and breaks off but it definitely still had some life left in it.
The tensioner had the typical failed bottom portion where it cracks and breaks off but it definitely still had some life left in it.
#15
DINOSAURUS BOOSTUS
Expert Gearhead
Justin....please quantify "heavy springs".
I'm not suggesting anyone try this with their motor.... I ran and it'* still together this way. 130# springs with a single JP chain...has ~50K on it. (Had my spring seat clearance machined to the correct 1.800" though.)
One thing to keep in mind is our stock heads have ~1.72XX" for a spring install height. Adding in modded retainers gives you ~0.060" to make the spring install height ~1.78XX". The LS platform springs that we use as replacements in our engines expect an install height of 1.800". Sure everyone installs and doesn't worry about the ~0.02X", lets be honest with ourselves though... how much preload does that add? The machinist I used said he'* seen spring preload about 20ft lbs in that space.
Just a little trivia to keep in the ole mind.
I'm not suggesting anyone try this with their motor.... I ran and it'* still together this way. 130# springs with a single JP chain...has ~50K on it. (Had my spring seat clearance machined to the correct 1.800" though.)
One thing to keep in mind is our stock heads have ~1.72XX" for a spring install height. Adding in modded retainers gives you ~0.060" to make the spring install height ~1.78XX". The LS platform springs that we use as replacements in our engines expect an install height of 1.800". Sure everyone installs and doesn't worry about the ~0.02X", lets be honest with ourselves though... how much preload does that add? The machinist I used said he'* seen spring preload about 20ft lbs in that space.
Just a little trivia to keep in the ole mind.
#16
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How Kev? I've never heard of this and am intrigued?
A double roller needs to be machined to correct the Austrailian chamfer vs US chamfer on the crank gear and the cam gear needs to be matched up as well. That way the chain has no clearnace issues to the oil pump cover. At first folks figured the cover clearance issue was a simple clearance problem from a larger gear set, in reality it was the chain not being aligned on the gears properly.
Dropping the subframe, it'* possible to do this in around a day. Do a couple of oil changes at 3-5 minutes of running and then 10-20 minutes of running. It'* good practice as some water, dirt and assembly lube will be in the oil.
A fourth clutch hub won't really help breathe new life into the trans. It will help ensure you don't lose 4th gear though. To help that in the meantime, don't go WOT when you are in 4th. Pull back down to 3rd manually and then go WOT. That way the added stress before the trans would normally downshift isn't loaded onto the 4th shaft.
A double roller needs to be machined to correct the Austrailian chamfer vs US chamfer on the crank gear and the cam gear needs to be matched up as well. That way the chain has no clearnace issues to the oil pump cover. At first folks figured the cover clearance issue was a simple clearance problem from a larger gear set, in reality it was the chain not being aligned on the gears properly.
Dropping the subframe, it'* possible to do this in around a day. Do a couple of oil changes at 3-5 minutes of running and then 10-20 minutes of running. It'* good practice as some water, dirt and assembly lube will be in the oil.
A fourth clutch hub won't really help breathe new life into the trans. It will help ensure you don't lose 4th gear though. To help that in the meantime, don't go WOT when you are in 4th. Pull back down to 3rd manually and then go WOT. That way the added stress before the trans would normally downshift isn't loaded onto the 4th shaft.
I have about 50 track passes over the given years with my chain and i dont give a second though about its reliability.
You can do what you wish, i just like the insurance of not worrying about a tensioner being eaten up.
#17
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Justin....please quantify "heavy springs".
I'm not suggesting anyone try this with their motor.... I ran and it'* still together this way. 130# springs with a single JP chain...has ~50K on it. (Had my spring seat clearance machined to the correct 1.800" though.)
One thing to keep in mind is our stock heads have ~1.72XX" for a spring install height. Adding in modded retainers gives you ~0.060" to make the spring install height ~1.78XX". The LS platform springs that we use as replacements in our engines expect an install height of 1.800". Sure everyone installs and doesn't worry about the ~0.02X", lets be honest with ourselves though... how much preload does that add? The machinist I used said he'* seen spring preload about 20ft lbs in that space.
Just a little trivia to keep in the ole mind.
I'm not suggesting anyone try this with their motor.... I ran and it'* still together this way. 130# springs with a single JP chain...has ~50K on it. (Had my spring seat clearance machined to the correct 1.800" though.)
One thing to keep in mind is our stock heads have ~1.72XX" for a spring install height. Adding in modded retainers gives you ~0.060" to make the spring install height ~1.78XX". The LS platform springs that we use as replacements in our engines expect an install height of 1.800". Sure everyone installs and doesn't worry about the ~0.02X", lets be honest with ourselves though... how much preload does that add? The machinist I used said he'* seen spring preload about 20ft lbs in that space.
Just a little trivia to keep in the ole mind.
I hope this link works. It'* basically the 3800 spring bible. http://www.prjperformance.com/Files/...0to%20Lift.htm
#18
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I appreciate all your help decided to go another route....
going to get rockers and a tune instead because I also need to beef up the suspension and fix some minor problems... rather fix everything instead of getting a cam and have my suspension fall apart.
going to get rockers and a tune instead because I also need to beef up the suspension and fix some minor problems... rather fix everything instead of getting a cam and have my suspension fall apart.