manley valve springs

[1fastlaser]

ive searched,any feed back on them?

im obviously running them no matter what,but just wondering on anyone else running them

 

[TSIfreek]

I have not seen anyone run them but should be a good product from USA. I would run them with TI retainers.

 

[92awddsm]

Ive been running them with titanium retainers since oct 04 and have had no problems with them. They have seen as much as 8800 rpm with no valve float or broken springs so I would say they seem to be fine. I will see how well they hold up over the race season.

 

[1fastlaser]

ok,well what about retainers,there not really needed

 

[TSIfreek]

It depends on how high you want to take the motor. I would put them in if you plan on anyting above 7800 RPM other than that the stockers will work just fine with good springs. It also depends on your cam but it has to be real agressive custom grind to really wory about it.

 

[1fastlaser]

well,its got a 2.4 g4cs in the car,well going in it,just rapping up porting the head.the short blocks on the stand.7800 is a good rpm,since im shooting for a power band range around there.Im running fp-2 cams which i had in the old motor.well thanks for the insite.

 

[ITSME4G63]

man dotn use that mustang shit

 

[tmizer]

Manley's here w/ FP3 cams. This is how they turned out after my machinist installed and measured them on my cylinder head (measured data compared to manufacturer's "advertised" (ie - marketing) data):

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[Suparata]

That valve open spec is incorrect.

 

[tmizer]

I originally just did this for the intake cam since it had more lobe lift so there should be 2 red bars. Also, yes, the bars "are" off a little, Excel or I screwed with the overlaid bars when creating the jpg from Powerpoint so, to be exact:

0.239 and 0.232 lobe lifts for intake and exhaust respectively give:
1.311 and 1.318 spring heights for intake and exhaust given
1.550 installed height.

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[Suparata]

I do appreciate your effort and I like the chart but you are making a mistake regarding the actual valve lift and that’s why the numbers don’t “jive”.
Also the installed height is something that you can "play with". Are the measurements taken with or without the spring seats?
Mitch.

 

[tmizer]

Doh! Mitch, you're right, I'll redo the chart tomorrow if work is slow. ....don't know what I was thinking at the time...so ummm... multiply by 1.70?...

Measurements were with the spring seats, and the machinist said while spring pressures were as accurate as they could be given the tools, the distance between the retainer and the seat were approximate as he had a hard time getting a gauge in there what with the proximity of the cam journals, head walls, and adjacent valve train shrouding what little room there is to work with.

While I really like my local machine shop (Schmidt Racing), I "think" the next time (god forbid there isa next time) I'll bite the bullet and make that trip up to Chicago
-Tom

 

[tmizer]

Graph is fixed. Thanks for pointing that out Mitch.
-Tom

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