Which Hal Springs for a 408 Iron 300# or 325#
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Which Hal Springs for a 408 Iron 300# or 325#
As the title says, I am just about to order a set of Hal R's and Hal springs. I have an iron block and wasn't sure if I should get the 300# or the 325#. I don't want it too soft and on the other hand, I don't want it to harsh either.
Thanks
Mark
Thanks
Mark
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Originally Posted by LowETz
I just did the 325# fronts w/the 90/10 12 way Hal R's under an aluminum block. I went w/the heavier fronts as not to bottom out on the collectors/pan. They're stiff but that's what I was after.
I'd do the 325's w/an iron block if it were me....
I'd do the 325's w/an iron block if it were me....
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i also picked up the 325 for my car with an aluminum block still
i have a 6 speed car and how MADMAN explained it to me was
auto with all weight reduction on the front go with 275s
stock wieght auto or manual with weight reduction go with 300s
stock wieght manual go with 325s
reason manuals want more spring is you want more stored energy to hit the tire harder
i have no ac right now but will probably put it back next summer
since you have the kmember and what not you can get away with the 300s on an auto and a iron block but if you liek to drive the car and for a lil piece of mind knowing that you wont bottem out the shocks gets the 325
i have a 6 speed car and how MADMAN explained it to me was
auto with all weight reduction on the front go with 275s
stock wieght auto or manual with weight reduction go with 300s
stock wieght manual go with 325s
reason manuals want more spring is you want more stored energy to hit the tire harder
i have no ac right now but will probably put it back next summer
since you have the kmember and what not you can get away with the 300s on an auto and a iron block but if you liek to drive the car and for a lil piece of mind knowing that you wont bottem out the shocks gets the 325
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Originally Posted by imslow
pewter, what are you runnin' nowadays?
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Originally Posted by 2001 Pewter WS6
Setup wise or time wise?? I have only made 2 passes so far before I broke my rear. It ran 11.17 with the full interior on 17's with a DA of 3000'. My a/f was way off at 11.9:1. I am trying to get back to the track this weekend with slicks to see if I can rip off a mid 10 sec pass. Temps are alot cooler now.
good luck.
was that time on a 17" drag radial?
Last edited by Bryan @ Speed Inc.; 10-27-2005 at 11:26 AM.
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Originally Posted by imslow
sweet! i ran that number exactly w/ a 224/220 cam and only 10.7:1 compression in my 402. but that was with perfect air, and a good tune. once you get some better DA and get the tune straightened out you're gonna be FLYIN'
good luck.
was that time on a 17" drag radial?
good luck.
was that time on a 17" drag radial?
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Originally Posted by xbadfishx17x
if you plan to have your fronts off the ground i'd get 325#. im think the 300# would bottom that engine is heavy.