Looking into valve springs, and trying to find alternatives to the Crane Springs.

I've found some Melling VS 590's, but can't find any specs. The MTC-5 kit recommends 'use vs-380 spring w/installed hgt. of 1.72' but can't find any info on them either... anyone here help me out?

 

TTT Sure someone can find out this info!

 

Can't help you with that exact info.

I do what to make an improtant note to everyone though. If you are going to install a new high lift cam and rockers, It is high advised that you install the cam first and break it in on the samller pressure springs and stock rockers first- keeping the motr at 2000 rpm's for a half hour (do not idle it, do not rev it higher). By installing the higher rate springs at the same time the cam goes in can cause too much pressure on the cam lobes at break in and cause premature wear.

 

Hadn't thought of that one... When I do a cam break in, I generally go 2k-2500 rpm, and vary. I've always been told that you do NOT want to hold it steady, lol!

 

The innitial run I have never felt is important to vary engine speed- Actually I feel its best not to vary- why?- because the very first initial run is just to marry the metal parts and smooth any imediate friction between them- revving will bounce more pressure on the lifters and cam. After the initial half hour run, install the higher rate springs and ratio rockers, then proceed with normal break in over the next 2000 miles with varied low rpm cruising speed- build (as the miles do) to an occational rpm busrt increase off of every fourth or fifth stop and go. up to 5000 miles- Then I put in the synthetic oil and step things up for the next 3000- changeout oil again, And let her rip.

 

Sounds good... I still need that spring info tho