any truth to this? or just a misinformed vette guy?
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Joined: Aug 2001
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From: looking for a flow bench so Brook and I can race
Originally posted by Mizz96Z28
I know 1.6 RR's give a HP increase but aren't they detrimental to pushrods over time due to the angle of the valvetrain being altered and run a risk of breaking a pushrod? Or am I misinformed?
Myles
I know 1.6 RR's give a HP increase but aren't they detrimental to pushrods over time due to the angle of the valvetrain being altered and run a risk of breaking a pushrod? Or am I misinformed?
Myles
you MIGHT bend a pushrod with a high lift cam. Id be hard pressed to see one BREAK
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Joined: Apr 2003
Posts: 1,591
From: PA
driveline angle changes? I don't think so. There is slightly increased wear due to the higher lift and higher accellerations involved, but the angle doesn't change.
extra .0333 lift from the 1.6. (.5*1.6/1.5=.5333)
if the rocker pushrod seat is 1.25" away from the stud, which i didn't measure but guestimated. That moves the pushrod tip over about .00044" (1.25"-sqrt(.0333^2+1.25"^2)=.00044) which is also only an estimate by right angles.
That would change the angle of the pushrod about .0035 deg.(arcsin(.00044/7.2))
Even if something is drastically off here which it may be since i did that really fast, you can see your not significantly changing the angle.
-brent
extra .0333 lift from the 1.6. (.5*1.6/1.5=.5333)
if the rocker pushrod seat is 1.25" away from the stud, which i didn't measure but guestimated. That moves the pushrod tip over about .00044" (1.25"-sqrt(.0333^2+1.25"^2)=.00044) which is also only an estimate by right angles.
That would change the angle of the pushrod about .0035 deg.(arcsin(.00044/7.2))
Even if something is drastically off here which it may be since i did that really fast, you can see your not significantly changing the angle.
-brent
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