Valve springs

[pcakes55]

I found some springs here: http://thmotorsports.com/tomei/tomei_valvetrain_valve_springs/13203r500/i-250025.aspx

 

It's $290 for the "A-type", and $430 for the "C-type". Is there a big difference between the two? They don't give you any kind of spring rate..

 

 

I also found some here at MSA: http://www.thezstore.com/page/TZS/PROD/PEM02/10-2011

 

They are $160 and are for Non-turbo applications. Don't stock turbo cams have less lift, therefor wouldn't that mean an N/A valve spring would have to be stronger than a turbo valve spring?

 

Anyways, these are the two places that I could find who sells them. Anyone buy them from somewhere else?

[nosebleedZ]

As far as my memory serves me (& it ain't perfect these days), I think all 70-84 Z & Maxima heads, had the same springs & rates. The differences were in valve stem heighth & face diameter on various heads. The last complete set I bought was from MSA as well. They were roughly $100 shipped to my door for 12 outer & 12 inner springs. If you go aftermarket or race cam, ie. Isky, Comp, Ferrea, etc. you will need to match the springs with "that" manufacturer's recommendations on spring pressures, bind rate, installed & compressed height, blah, blah, blah, to avoid wiping out an expensive setup in the first 30 seconds its fired up. Horsepowerfreaks.com, tomei, & jim wolf technologies among 40 others, have the exotic valvetrain goodies "usually available" Honestly, if you don't plan on revving your motor past 6K it's whole life, stock L6 stuff is great with a few mods (see Dragonfly & Braap's stickys). IMO, most people usually over cam, carb, & rev an engine for the street or weekend warrior, instead of building truly flexible cars. But if you want to move the power curve into a different band, or it's gonna be a mostly racer, open up your wallet & let Ben Franklin rub his light sensitive eyes, if the screamin' sound of a punished L6 what your going for bud!

[Xnke]

I would call up rebello, Dave is a great guy and helped me choose a set of springs; I am using the A package from him. It's only the outer springs, you use stock inners. I'm sure he can set you up with a set of stock inner springs, too, and the best part:

 

Total cost of the new springs was 120$ shipped, AND you use stock nissan retainers, spring seats, and valve locks. The rebello A springs don't coil bind till like .580 lift, too, If i remember correctly, but they are spec'ed out for .460"-.510" lift cams.