My buddy and I were talking about our cougars.
Both are 67 mines an xr7 289 2v with c4 trans and 2.79:1 rear diff.
His is a standard 289 4v with c4 trans and 3.00:1 rear diff.
We are trying to find out if there was any difference in compression in the 2v and 4v. Does the 4v have higher compression from the factory?
He has already swapped motors for a 5.0 fuel injected mustang motor but we are still a little curious.
Yup! You didn’t get 25 more horse just by two more venturi. FWIW, The 9.8 4bbl compression is many times reported as 10:1 in some Ford and other publications.
With a 427 C.I. 351 stroker I’m hoping for 1,565 HP. Pump gas burning, quad turbo’d Cougar messiah, preaching to the masses! YEAH! Wikkit-pissah kewl!
I’ll be strokin’ it myself. My friend has a hand come-along and he stole his grandpas way kewl butane pipe lighter! Using the come-along and the pipe lighter, we think we can lengthen the connecting rods and build our own stroked motor!
Hey, any of you pork-bellied Christmas ham eating old-times have any tools I can borrow?
You are correct sir. In my original post, I was aware that ClassyCat (Harvey) had a 390-2V (X code Cougar) and that is what I was referring to. I just noticed the other 390-2V (Y code) in my '68 shop manual. It has a compression ratio of 9.5:1. John