How can I tell which springs are on my mongoose heads? I can't remember if they came with the upgraded springs or not. Either way, does anyone know the specs on both springs, stock and upgraded? Thanks,
Dave

 

I don't know what springs they are (I think AFR makes them) but i've heard they are really good quality and some of the nicest springs out there...

 

I believe the stockers are good up to .600 lift while the upgraded springs are good up to .650...Don't quote me on this, but this is what I have ran across...Nice set of heads you have there!..What cam are you running?..

Kev

 

arent the standard springs single and the upgraded duel?

 

My heads just arrived last night with the 8019's (upgraded springs). I think they are 155 on the seat and the stiffness is over 400 lb/in. The base springs are closer to the Patriot Golds in seat/stiffness. The 8019's have a silver look to them.

8019: 155# @ 1.810 has a rate of 428 lbs/inch and an open force of 412# @ 1.210 and are good for .650" lift

 

Our standard springs and our 8019 upgrade springs are both dual designs similar in color, size, and appearance when installed (unfortunately). The best way to tell them apart is to visually ID them off the cylinder head. The standard spring has an inner spring thats slightly shorter than the outer....the upgrade 8019 spring has a much longer inner spring that is 3/16" to 1/4" noticably taller than the outer spring.

Or you can check installed height and seat pressures but you would need the proper equipment to do so.

Tony

 

Thanks Tony. That's easy enough to remember. I'll check 'em out tonight. As for the cam I'm running, it's the GM ASA cam. I'm hoping for good numbers with this combo.