Guest

I finally got my block and L89 heads over to the engine builder on Sat. He and I have been talking for several weeks about the build, and originally he was thinking of keeping the 454 crank in it, and building it from there. Our most recent conversation on Sat has him thinking of something different. He suggested internally balancing it and building a 427 instead. This will mean changing the crank and several other items. The crank I can sell, so no biggie.

What do you guys think? Since I am building the car as an L89 clone, why not, right? Opinions, thoughts???

Thanks,
Rob

78Vette-SA

Repeat after me... There is no replacement, for displacement. Again, There is no replacement, for displacement. One more time... :thumbs:

Ironcross

:iagree: :thumbs:

SWCDuke

With the same cam, inlet system, exhaust system, heads - everything the same except stroke, a 454 and 427 will make about the same peak power, BUT the 454 will do so about 500 revs lower, AND it will make more power across the rev range because of the greater torque at all points. At the same time the 454 will have about a 500 rev lower peak useable operating range, but your valvetrain will appreciate it.

I cannot imagine any reason to destroke a 454 to 427 unless you are racing in a class that has a seven liter displacment limit.

Duke

six-T-six

There isn't any mechanical advantage and visually the difference is minimal so if it was me, I'd go with the 454. Wait a sec, I did go with the 454. :thumbs:

Ironcross

Almost, except the 27 will out RPM the 54 if its necessary. a Plus on the 54 is the rod angle.


There isn't any mechanical advantage and visually the difference is minimal so if it was me, I'd go with the 454. Wait a sec, I did go with the 454. :thumbs: [/QUOTE]

Hitch

Rob did you end up using the guy I did? Or did you go to Ashworth??? Dave..

Guest

I got Ashworth really interested into it and he's the one building it. Thanks for the name of the other guy, I'll have to keep in mind for future reference. Especially after a spin in your ride. :thumbs:

Guest

Guys, thanks for the replies. It definitely has me thinking again about keeping the crank and 54 setup. :cheers:

Ok, how does it go?

"There's no replacement for dis..., dis...?" :lol:

66427-450

agree, stick with the 454 crank ! (no one will know.... except the 427's you spank :) )




[Modified by 66427-450, 10:40 AM 2/20/2004]

Boogieman65

Too big is almost big enough. Keep it large.

LouieM

Size does make a difference, and bigger is better, so....... :smash: