if you turn the bloc upside down, you will see notches at the bottom of the inside cylinder walls..

Even if the block doesn't have the notches, a die grinder will do the job.

Install the crank and piston, rotate the crank, mark the area where it hits, then grind a small notch..don't grind a lot, cause if you do, you will hit the water jacket...just little at a time till the rod rotates without interferance, then do the next...or you can take it to a machine shop and have them do it.

 

gkull, so what's your 427 do in the quarter, cause I bet I could take you with my 327!!! I know I'm stupid!! but what does your last line mean??
I only have a hot rodded 427 and I don't have any illusions of taking on somebodies hot rodded 540 ci monster. Thats about as stupid as the guy with hot rodded 350 ci taking me on.

are you telling me that a 327 won't rev quicker than say a 383?? I wasn't talking about torque, I said more cubes was better. He asked the difference.

 

rev quicker in neutral only. That statement is also not true. I used a 40 lbs hollow drilled 4340 nitrided 3.750 stroke crank in my 383. typical stock SBC forgings are 50 ish pounds and the cast SBC cranks are @56#

The least rotating mass motor will gain rpm the quickest

Longer stroke might have a marginal loss on friction, but the motor with the most TQ can accelerate the fastest.

I was just commenting on the wrong notion of the shorter stroke 427 ci reving faster than a 454 or 502.

If you build 3 motors with everything the same intake system, heads, cam shaft, exhaust system, including compression. but all you changed was cubic inch by changing the stroke length. Like 3.76 = 427 4.00 for 454 and 4.25 for 480 or so ci. They will all have the same HP within a few. Only the longer stroke will have the same HP at a lower rpm. The big change from 427 - 480 is 53 ci with might give you a additional 800-100 pounds of TQ

1/4 mile is really for people that drink beer with a lime in it. Lets call this group "girliemen". Real men do the 1 mile drag racing out at santioned events in their street cars. That's where you shut up the guys that think they have a hot c-5 Z06 or the new C-6's. High tech FI late Vette with 350 ci does not rev faster than old carburated 383 or now my 427.

 

dammn dissing my sport and my beer all in one post. LOL you gonna put my panties in a knot.

 

there is no replacement for displacement, ...

well maybe money if it is a factor

 

The whole original idea of lime or lemon in drinks is to make non-refrigerated drinks better. Now this is the modern era where we all have refrigeration and the lime is used to cover up the taste of all the urine from all our south of the border friends filling the vats.

to the poster - If you can get a BBC 427 and make it a complete running motor with correct dynamic compression for todays pump gas for less money than the 454-502 I'd say that you will be happy.

 

I agree with gkull about the 1/4 mile being too short. I have never heard of 1 mile drag races, however. In my opinion, drag racing should be extended to 1/3 mile rather than 1/4. If it is extended, we will see fewer jalopies beating Vipers, etc. 1 mile seems a bit too long, though.

 

Not always true, The most torque will only accelerate fastest if set up properly, true, ie, gears, trans, ignition, etc, I've seen plenty of "big torque motors get "cleaned up" by small blocks, and I did say "the cubes are obvious". I'm not here to argue, only learn from others. Anyway I love my Chevys, I have 2-327's, 3-350's and 2-454's, always wanted to get my hands on a 427.

 

All ya gotta do is throw in a 3.76" stroke crank and pistons, rods are the same, into one of your 454's and voila, you have a 427.

 

I realize this but think I'm going for 496.

 

When I asked my engine builder if I should move up to a 454 his answer was that cubic inces = torque, and torque is what you feel when you drive. Each cubic inch is about = to 1 lb of torque. And you will feel 27 lbs. of torque when you drive.

He also said that cubic inches are like free power. To get the same power out of a smaller engine you need to build it a bit more radically, higher compression, bigger cam.

As far as a 427 spinning up quicker... well I can hit the redline in first gear pretty fast! sometimes faster then I can shift to second

~Jay

 

the zz502 has decent power launching your car in the low 12s in the quarter. The engine is very driveable. I've driven it in the heat of the day 105degree F and never overheated. This engine has plenty of vacuum (fairly small cam for its size). Corvettes have fairly good traction so traction is not much of a concern with my auto tranny and 3.08 gears. With high gears allows me to drive at fairly low rpm at highway speeds. A world of difference from my stock 180hp 350.

 

where is the 427 at? If your not interested I bight be if its nto to far away?

 

This is exactly what I am doing.. I bought a 427 for what I thought was a good deal. I ended up putting another 3k + into it after I tore in to it and found that it was an 11.25 to one CR motor and the late 60's square port iron heads which did not have hardened seats or guides (ok with the miles I'm going to put on it they prally' would have been ok). I just want the thing to be fun and run on pump gas. I'm guessing the motor was running on pump gas as I saw evidence of it pinging itself to death on the pistons (melted tops, ring land damage).

I'm happy I decided to tear it down to see what I had. I still came out a bit cheaper going this route, but not the deal I thought I had. But it was fun building it though. -F

 

After some digging, it turns out that the 427 is a truck motor. Vintage is suppsedly late '60s. Did Chevy make a 4-bolt 427 truck motor in the '60s?

 

It costs more to build revs into a motor then cubic inches. The 427 was meant to rev to 7500 for short bursts. Sure you can build it for higher revs but it costs too much, eats piston rings and wrist pins.
I would rather just build it bigger.
Even the valve springs to run high rpm for extended periods eats lifters.
No rpm is not worth the price. Build cubic inches.

 

I wish I had a 572. After which, I would wish I had a 640.