The PI cams have a overall lift of .462 not the .510 that is grossly misrepresented all across the internet.
Hmm. What's your source? My 2002 Ford Workshop Manual (Helm) lists the theoretical valve lift at zero-lash to be 0.510" on the intake and 0.540" on the exhaust.
Are you sure you're not thinking of NPI cams that had something like 0.466" lift on the intake and exhaust valves?
If I haven't provided any useful technical assitance in this thread then you haven't been reading my posts.
Sorry, what you've provided has been of virtually no value to me. For example, I know what installed height is while you, apparently, were confused. You said
"
The installed height of that spring is .026" higher than the stock spring. That means at .550" lift on the aftermarket spring you will actually have .026" more retainer to oil seal clearance than the stock setup."
I was rather polite in the follow-up post about the height being the same if all that's changed is the spring but you continued on with
"
The installed height has everything to do with the spring. It is the actual measurement of the distance between the bottom of the valve spring retainer to the spring pocket when the valve is seated. It is not a recommendation by any means. It's the actual height as measured with a stock length valve and stock valve seat."
Stock valve...stock seat. IH does not change between springs. Whatever dude. I know you said you had me confused with someone else but...
Comprat has a different camshaft with a different lift. This is what happens when people like you don't pay attention and simultaneously kick a gift horse in the mouth.
People like me start a thread with a very clear title:
"
PI 2V:
OEM springs with Comp 262
AHs?"
I specify it's a
PI engine and I want to use original springs with 262
AH cams. Right there in the subject. How much clearer am I supposed to be?
Do you want me to read others' minds when they say "Yep. I did it and it's great" and know that they're mistaken or lying? Am I somehow wrong for reading their replies and taking them at their word? Give me a break.
Look, COramprat explained the mix-up and even apologized. I thanked him for the clarification and will simply move on to do more research.
Here is some assistance..... use an aftermarket spring.
I probably will, eventually. Depends on what my research shows.
. You guys really need to quit going by what you read on these websites because aftermarket and performance shops hire a webmaster to design their sites. 99% of the webmasters that put together these sites don't know a muffler from a tire.
