10-05-2007, 12:51 PM #1
Anyone have stock installed height or seat pressure specs?
the 4-tec engine manual gives me pretty much every spec except for seat pressure and installed height.... if anyone has this information please let me know, thank you.
10-06-2007, 12:10 AM #2
stock seat presures are 40 lbs not sure about heights
10-06-2007, 08:45 AM #3
- Join Date
- Jun 2005
- rome ga
If you run it up to 100lbs it will break rocker arms. I thought stock was around 60lbs.
10-06-2007, 09:51 PM #4
if you want to run 100lbs you need to replace the ex valves with one piece valves or you will break a valve head, i found that out more than once i havent heard of rocker arms breaking before
stock seat pressure is 40 lbs
10-06-2007, 11:44 PM #5
10-07-2007, 12:19 AM #6
the inlett valves are fine they are a 1 piece valve but the exhaust valves are shit they have ruined a few engines
10-07-2007, 10:56 AM #7
I agree and that reminds me, i have stock lightened valves (even weaker than stock) in one of my heads that i'm going to replace with these.
The best valves money can buy
10-07-2007, 11:08 AM #8
so if i'm doing a valve job on my head and cutting the seats, what do i want seat pressure to be with stock valves? i'm not getting different valves on this head.
10-07-2007, 11:38 PM #9
why not stay with stock seat presure(40lbs)if you arnt doing any mods!
jerry i to have lightend stock valves in my turbo ski and worry about these things, do you know the weight of the lightend valves you sell compared to lightend stock valves?
10-08-2007, 12:29 AM #10
oh, there's PLENTY of mods, but i ain't droppin $750 for valves and $600 for springs, i'm not that nuts. I'd sadly rather see my motor blow up again
i dont race on a course and put my ski thru the same type of abuse... there's far too many rec skis with plenty of mods that have had stock heads last 200+ hours...with 8600 and higher boost.... REC. hours, not bouy course hours
i just was trying to clear the discrepancy of what stock seat pressure actually was since i've been told a few varying specs.
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