575SCi Valve Springs?
#1
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575SCi Valve Springs?
Freshing up the heads on my 575SCi's and adding Whipple innercoolers. What should I use?? Merc or aftermarket and what brand/part number?
Thanks
Thanks
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I think the black springs from merc are the Comp cams springs, they had an earlier design then changed if i remember right, they should be good to run unless you are changing to bigger cams or turning more than 6000 rpms
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Thanks Mark
I talked to the Comp Tech line yesterday. The closest they have to stock spring spec. is P/N 924. It has a lower seat pressure and lower lift pressure. It's not a direct replacement and I will have to get new retainers and locks. The Whipple kit includes remapping the ECM and raises the rev limiter to 5600 from 5300 rpm. Seems assbackwards to raise rpm and lower spring pressure
Anyone with some first hand experience? Thinking stock Merc springs might be the easiest.
Thanks all
I talked to the Comp Tech line yesterday. The closest they have to stock spring spec. is P/N 924. It has a lower seat pressure and lower lift pressure. It's not a direct replacement and I will have to get new retainers and locks. The Whipple kit includes remapping the ECM and raises the rev limiter to 5600 from 5300 rpm. Seems assbackwards to raise rpm and lower spring pressure
Anyone with some first hand experience? Thinking stock Merc springs might be the easiest.
Thanks all
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what is your seat pressure, i would think about 145 lbs, i know you dont want much over 150 seat pressure with a hyd. cam
Last edited by H2Xmark; 03-09-2008 at 09:16 AM.