factory magnum 360 roller lifters
Lets all step back a minute here and look at the meat and potato's of the post.
I have read somewhere that they are fairly heavy and also don't like to rev past 5000rpm but I have been shifting mine at 6k so far with no issues. guess Im curious if they will maybe pump up? or maybe they are they going to be a cam profile limiting factor in some way? has anyone used them in a fairly seriously built motor with good sized cam and how did they work out? will probably be shifting at around 6500 with my new motor but will have alot more cam and certainly more spring pressure from the edelbrock installed springs. while I am sure there are better available I am currently just about "spent out" and another $5-600 for lifters will put installation off for another month or so and well into the cold rainy season here. will these lifters work for me?
The issue with the stock Edelbrock springs is not an issue but is addressed, unclearly, but in a way I beileve he means to replace them since it says;
but will have alot more cam and certainly more spring pressure from the edelbrock installed springs.
It seems misworded.
He mentioned he's about spent out. No broke, just low on funds.
The real issue at hand is about the roller lifters.
Can they handle an agresive cam profile and to what RPM are they OK to rev to?
This is the real question.
supersonictoys, I have read, I have not been there and done that, but have read the stock roller lifters are good to approx. 6500 rpm. This limit is due to the weight of the lifter. I have not read anything about the lifters being limited to any agressive rate cam. They just mentioned that it's weight is the issue.
For most cases, a stroker engine makes almost all it's power by 6000 - 6500 rpm unless it's built for racing. If it is a street engine and even with a aggressive roller lift, the peak power it makes is a combonation of the engines combo. Looking at all your parts and knowing this is a long 4 inch arm, the question to you is, what are the cam specs that are going to be used.
At 400+ inchs of engine with the 4 inch stroke, I'd bet your not going to make power past 6500 even if you get lighter lifters. The heads could use some port work in order to support the extra inchs unless the cam is mild....which by your statement, will not be.
OH, also, just because Edelbrock says the springs are good to .580 lift doesn't mean it is good for an aggressive cam with less leift. An aggressive rate cam will need more spring pressure. Just purchase the cam and lfters togther from the same manufacture or get there recomendation on what spring to use with the Edelbrock head.