When is a cam too big for a hydraulic roller?
09-21-2005, 09:25 PM
#1
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Posts: 501
When is a cam too big for a hydraulic roller?
the cam i have in mind is 24X/25X .570 lift. @ .05" its 30X/31X Adv Dur. but i would like to stay solid roller, but still make power spinning to 7k, this is also a somewhat, daily, weekend car, and the oiling issues of solid rollers idling alot isnt going to play well with me because i've got a fair amount of stop and go traffic and sitting at lights.
09-22-2005, 10:39 AM
#4
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Location: Upstate NY
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Re: When is a cam too big for a hydraulic roller?
Originally Posted by chrism400
What's a short rugger?
Rugby was SStrokerAce's game: football without pads, and lots of beer drinking afterward. Girl's rugby makes girl's soccer look like a tea party.
09-22-2005, 04:13 PM
#6
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Re: When is a cam too big for a hydraulic roller?
If you don't play rugby your not going to understand.... lots of good stories from playing, just less family friendly than Robbie Gordons thoughts on Michael Waltrip last weekend.
Bret
Bret
09-22-2005, 10:11 PM
#7
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Re: When is a cam too big for a hydraulic roller?
max RPM of 7000rpm due to stock ECM.
high compression 355
heavily worked stock LT1 castings.
58mm tb and worked intake
longtubes
ecm tune
i wanted to go that big with the duration to shift the power band up to make it in my effective race RPM. (5-7k) and using Engine Analyzer Pro (try to keep the laughing minimal lol) it sat the powerband right where i wanted it and had an average hp/tq of 410/390 from 4-7k, which is what i am more concerned with, but it also peaked at 475/425, but even comp suggested a relatively similar cam with slightly less lift, which i will probably go with to preserve spring life.
hehe, and rather be a lock than a hooker
but for the purpose of the quote, i couldnt put my signature pic in so it kinda lost its meaning. hooker as in traction i also have Dead Hookers Inc. hats/shirts i made 
PS: its also hard to try to find the opinion of a serious solid roller guy, i mean are the oiling issues as serious as people make them out to be. is the upkeep really that bad? i've been told a wide range of things such as ill have to check the seat/open pressures every couple hundred miles and shim accordingly, and the general maintenance, and i have also been told that all id have to do was check the valve lash every 2000 miles. and then the talk of low oil pressure at idle causing premature lifter wear and whatnot?
high compression 355
heavily worked stock LT1 castings.
58mm tb and worked intake
longtubes
ecm tune
i wanted to go that big with the duration to shift the power band up to make it in my effective race RPM. (5-7k) and using Engine Analyzer Pro (try to keep the laughing minimal lol) it sat the powerband right where i wanted it and had an average hp/tq of 410/390 from 4-7k, which is what i am more concerned with, but it also peaked at 475/425, but even comp suggested a relatively similar cam with slightly less lift, which i will probably go with to preserve spring life.
hehe, and rather be a lock than a hooker
but for the purpose of the quote, i couldnt put my signature pic in so it kinda lost its meaning. hooker as in traction
i also have Dead Hookers Inc. hats/shirts i made PS: its also hard to try to find the opinion of a serious solid roller guy, i mean are the oiling issues as serious as people make them out to be. is the upkeep really that bad? i've been told a wide range of things such as ill have to check the seat/open pressures every couple hundred miles and shim accordingly, and the general maintenance, and i have also been told that all id have to do was check the valve lash every 2000 miles. and then the talk of low oil pressure at idle causing premature lifter wear and whatnot?
Last edited by Sneakin Deacon; 09-22-2005 at 10:15 PM.
09-22-2005, 11:12 PM
#8
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Join Date: Oct 2002
Posts: 6,518
Re: When is a cam too big for a hydraulic roller?
Deacon,
You can do what you want to do with a hyd roller without a issue....
The key to ANY software is GIGO... the hard part is that most people do not model the motor correctly because they don't know everything. The software has a lot of nuances that can really throw you off of the real world if you don't use them correctly.
If you want help with this shoot me a e-mail, I know the ins and outs of EA Pro pretty dam well.. it's a great tool but it's like a flow bench it will always help but it only really helps if you know what to use it for.
A solid roller with this type of duration is not too far off, but you don't have to go solid roller to do what you want to and have some spring life.
Bret
You can do what you want to do with a hyd roller without a issue....
The key to ANY software is GIGO... the hard part is that most people do not model the motor correctly because they don't know everything. The software has a lot of nuances that can really throw you off of the real world if you don't use them correctly.
If you want help with this shoot me a e-mail, I know the ins and outs of EA Pro pretty dam well.. it's a great tool but it's like a flow bench it will always help but it only really helps if you know what to use it for.
A solid roller with this type of duration is not too far off, but you don't have to go solid roller to do what you want to and have some spring life.
Bret
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