Hey guys, anybody running big cubes on the streets these days, just seeing what is out there...

I have a 632 in the works
Donavon Aluminum block
Callies 4.75 crankshaft
eagle 6.7 rods
Je Custom 10.5 compression pistons(pump gas motor)
Brodix Big Brodie heads(done by Reher/Morrison)
Dart intake
Comp solid roller(it's big) thats all I can tell you.
backed by a Turbo 400 with a brake

Should get about 5-7 mpg, not a economy car thats for sure

 

What did that donovan run you $$$$?

 

$2000 used, came with 2 new sleeves that I had to install

 

That's definitely big. I'm going to be running a 555 in my T/A.

 

540 going to 565 next rebuild. Rarely street driven these days, no more than a few laps around the block the last few years, just so it's considered "street driven". Engine size has nothing to do with streetability anyway, it's camshaft size and how long will the lifters and springs last.

 

WOW bro let me know if you see another aluminum block for that price used ill grab it asap

 

holy hell, that sounds like a badass setup

p.s., what color is your 67, just wondering if i have seen it around town

 

Sounds sick, I you sure you don't mean 5-7 gallons to the mile???


As long as you have a good top notch aftermarket cooling system you should be ok. My 468 stays cool all day long with two sets of fans and a belt driven water pump. One of the fans is attached the the water pump (ditching that soon for an electric water pump).

As stated above more of the issue is cam size and valvetrain

 

Well You Can Go As Big As You Want Aslong As It Lasts

 

I got lucky on the block, most likely will not c another like that, unless it has been destroyed.

 

It will be stay cool, already have the radiator and fans to go with it, no problem on that...been dealing with big blocks for 20 years know, never hade 1 overheat. As for the valve train, it will be fine, just have to adjust them every now and then

 

HMMM I have allways been told the larger CUI you go the harder it is to keep cool. IE 5XX and up.

 

Wouldnt that depend on the car? And what your doing with that motor?

 

Yes, but I doubt someone building a 6XX motor is building something mild

 

Just went from a 598 in a street car for 3 years with no problems, to a 615 in a buddy of mines car....depends on how its built and who built it, it will be fine

 

Im sure it will be fine, was just curious

 

It will be kinda mild, most people don't know that more cubes, eat up the agressiveness of a pretty good size cam and calms it down some.

 

Sounds like a carzy 1st gen

I do know of one other 632" streetcar a 67 Vette. He posts on Corvette and sometimes Team Chevelle.

http://forums.corvetteforum.com/show....php?t=1728758

 

Thats true, the more CUI the smaller the cam is in the motor. As in a BIG cam gets smaller with the more CUI the engine gets.

For a 350 a .650 lift cam might be considerd big but for like a 408 its just right.

Its all relative.

 

I am planning a 572 crate with a cam swap for my 1969 Impala backed by a th350. looking for around 600 rwhp in the street car. It was my first car and a gift from my great grandmother.. I am rebuilding the car in her memory. She bought it brand new in 1969 (paid cash) 327/pwerglide 2 door vinyl hardtop.