Do engines need pinch?
#1
Do engines need pinch?
Hi Guys,
I do know the top of the sleeve is tapered. But do we need pinch at all? All we want is compression right? Please correct me if I'm wrong. Thanks!
I do know the top of the sleeve is tapered. But do we need pinch at all? All we want is compression right? Please correct me if I'm wrong. Thanks!
#2
Yes they need a pinch to help compression.
#3
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i managed to lose all the pinch on the engine in my firestorm (first engine, lots of tuning problems) but it still has compression. and still runs ok!
#4
The upper area of sleeve is hotter than mid and bottom area, they expand more, that's why they are tappered.
#6
Tech Regular
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Pinch is different that compression, on fully broken in motor with the glow plug out there should be no resistance to the piston moving in the sleeve. But when you put the glow plug back in it should be hard to turn the motor over warm or cold. That is compression, when a motor is easy to turn over warm then it is worn out, as a general rule. Along with that when the motor does get up to temp it has trouble idling and running well in general
#7
as long as it idles good and holds a tune you are good to go..
#8
Pinch is different that compression, on fully broken in motor with the glow plug out there should be no resistance to the piston moving in the sleeve. But when you put the glow plug back in it should be hard to turn the motor over warm or cold. That is compression, when a motor is easy to turn over warm then it is worn out, as a general rule. Along with that when the motor does get up to temp it has trouble idling and running well in general
Yeah, we're in the same boat (nope I don't run a Firestorm, just similiar situation).