427?
 

Hi guys,

Newbie here. I have a 69 Camaro SB SS clone and have been thinking about putting a 427 in it. Can someone please tell me where I can find build specs and part numbers for a 427? Which engine books to buy, web sites to go to? I need to educate myself on the 427 before I make the leap. The pic below is my 69. Thanks guys

http://img513.imageshack.us/img513/2...0071xe9.th.jpg

Re: 427?
 

There are a few Camaro books out there at Borders or Barnes and Noble. One in particular is Chevrolet by the Numbers by Alan Colvin. Should get you started on what to look for.

Re: 427?
 

[ QUOTE ]
There are a few Camaro books out there at Borders or Barnes and Noble. One in particular is Chevrolet by the Numbers by Alan Colvin. Should get you started on what to look for.

[/ QUOTE ]

The books-a-million by me doesn't have it but I just saw a new B&N by the house I'll have to go have a look. Thanks

Re: 427?
 

If you have any resto Catalogues, they have a lot of (car) specific info in them, including books. Most of the time, local book stores can get those books for you as well. Date code and specific numbers on blocks and parts can get a bit costly if the car is not original. But that depends on what you plan on doing with the car. A big block 454 crate motor is just as effective dressed up to look like a 427 as a real 427 itself. IMO, if the car is going to be a driver, take a 454 and dress it up to look like a 427. It will still give you a 425hp big block with out the dent in the piggy bank! Beautiful Camaro by the way and Welcome to the site!

Re: 427?
 

[ QUOTE ]
Hi guys,

Newbie here. I have a 69 Camaro SB SS clone and have been thinking about putting a 427 in it. Can someone please tell me where I can find build specs and part numbers for a 427? Which engine books to buy, web sites to go to? I need to educate myself on the 427 before I make the leap. The pic below is my 69. Thanks guys

http://img513.imageshack.us/img513/2...0071xe9.th.jpg

[/ QUOTE ]
Original 427's are dime a dozen, don't settle for a suburban block with a 366 crank.

Re: 427?
 

[quote
Original 427's are dime a dozen, don't settle for a suburban block with a 366 crank.

[/ QUOTE ]


Real 427s are not rare by any means but "a dime a dozen"? If you find a complete rebuildable 427 for under $2500 you've done good.
James

Re: 427?
 

[ QUOTE ]
[quote
Original 427's are dime a dozen, don't settle for a suburban block with a 366 crank.

[/ QUOTE ]

Real 427s are not rare by any means but "a dime a dozen"? If you find a complete rebuildable 427 for under $2500 you've done good.
James

[/ QUOTE ]

I'm going to buy the books and educate myself. If I were to find an engine that was supposed to be an original 427 how could verify that it is infact a true 427? Never thought about trying to find an original motor, I thought I'd just buy the correct parts and assemble it. $2,500.00 sounds pretty good for a 427 to me.

Re: 427?
 

Beware of 427 tall blocks, found on some larger trucks. Passenger intakes will not fit without spacers on the intake.

The 512 block was available in both 2 bolt and 4 bolt versions. If you find a full motor, great, but if you are doing a 427/425 COPO look-a-like, then you'll be changing heads, intake, carb anyway, so a block only would be a good starting point.

Re: 427?
 

[ QUOTE ]
Hi guys,

Newbie here. I have a 69 Camaro SB SS clone and have been thinking about putting a 427 in it. Can someone please tell me where I can find build specs and part numbers for a 427? Which engine books to buy, web sites to go to? I need to educate myself on the 427 before I make the leap. The pic below is my 69. Thanks guys
build your own home grown version. 454 block 396 crank 427 piston mine made 622 hp on dyno.
http://img513.imageshack.us/img513/2...0071xe9.th.jpg

[/ QUOTE ]

Re: 427?
 

Sweet piece!.

You'd be best to first check in on member 427King.. From basic 427's to an original MN Copo engine, he's often got more than a few available..

Here's a link to one of last weeks ads..

https://www.yenko.net/ubbthreads/showflat...true#Post303781

Good luck!
https://www.yenko.net/ubbthreads/imag...lins/beers.gif
~ Pete

Re: 427?
 

A dime a dozen EH
Id like to see a 427 4 bolt standard block 321 block for a dime! https://www.yenko.net/ubbthreads/imag...mlins/wink.gif
PJ

Re: 427?
 

Are you wanting a "clone" of a specific 427 (L72, L88, L71, etc)...or just wanting the feel of a 427? If it's the latter, just find a 454 block out of about anything and throw a 3.76 crank in it and call it done...then bolt on the appropriate exterior goodies.

Re: 427?
 

I found these 2 crate motors, probably couldn't afford the first one but the 2nd looks interesting. I guess i'm looking to clone a 427 that would have come either in a COPO or a Yenko or a Motion car, the power of the 427 is a big plus !!!

http://www.sdparts.com/catalog/crate...ryEdition.aspx

http://www.sdparts.com/product/19166...eAssembly.aspx

Re: 427?
 

As for the cast iron motor..you can build your own for less...430 hp seems a little mild given the modern heads and roller camshaft https://www.yenko.net/ubbthreads/imag...s/confused.gif they are probably using the same heads and cam from the ZZ454 engine....as for the aluminum job...why can't they say what the horsepower is exactly...doesn't GM have a dyno https://www.yenko.net/ubbthreads/imag...mlins/hmmm.gif it would be cool to have one..but I'm sure they will be pricey.

wilma

Re: 427?
 

I'm thinking for about 1/2 the price you could build a bbc to stomp the fire out of that GMMP crate engine...

Re: 427?
 

Well after doing some more 427 research it looks to me like an L71, L88, L89 or a ZLX might be fun motors. I have a cowl hood, would a TriPower fit underneith it?

Re: 427?
 

You should get a hold of Rick Bawcom...he's in Texas. He's pretty familiar with some high horsepower big blocks...

HIs name on this site is TXSS Click here for his info!

Re: 427?
 

[ QUOTE ]
I'm thinking for about 1/2 the price you could build a bbc to stomp the fire out of that GMMP crate engine...

[/ QUOTE ]

You got it Rob...get a good use 454 block and just build a 427. I have had some experience with the GM crate engines...you can do much better yourself for a lot less.

wilma https://www.yenko.net/ubbthreads/imag...ins/3gears.gif

Re: 427?
 

1 thing I forgot to ask, can a 427 run on 93 octane pump gas?

Re: 427?
 

I took a 454 2 bolt main block, put a 6223/3.76 steel crank with 7/16 dimple rods and 427 Keith Black hypereutectic
pistons. Heads were 115cc 6272990 rectangular port with 3933163 intake and 4053/780 vacuum secondary Holley. Compression was 9.975 to 1. Ran on 93 octane and was about 520 HP...... Muncie M20 with 3:73 12 bolt. Tons of fun in my 1968 Nova. https://www.yenko.net/ubbthreads/imag...ins/3gears.gif

The best part about it was it would rev as fast as a small block which is an advantage over a 454 in my opinion. Plus I love rpm's.... https://www.yenko.net/ubbthreads/imag...iggthumpup.gif

Re: 427?
 

[ QUOTE ]
I took a 454 2 bolt main block, put a 6223/3.76 steel crank with 7/16 dimple rods and 427 Keith Black hypereutectic
pistons. Heads were 115cc 6272990 rectangular port with 3933163 intake and 4053/780 vacuum secondary Holley. Compression was 9.975 to 1. Ran on 93 octane and was about 520 HP...... Muncie M20 with 3:73 12 bolt. Tons of fun in my 1968 Nova. https://www.yenko.net/ubbthreads/imag...ins/3gears.gif

The best part about it was it would rev as fast as a small block which is an advantage over a 454 in my opinion. Plus I love rpm's.... https://www.yenko.net/ubbthreads/imag...iggthumpup.gif

[/ QUOTE ]

Did you have to use a block girdle or are they splayed mains?

Re: 427?
 

My L72 has static compression of 9.73, and runs on 93 no problem.

Re: 427?
 

Did you have to use a block girdle or are they splayed mains?

[/ QUOTE ]


This was a stock 39999289 block with 2 bolt mains. No modifications are needed to do this.

All you are doing is de stroking the motor from a 454 to a 427 when you use a 3.76 396/427 crankshaft. 427 and 454 both have a 4.25 bore. But you have to use 427 pistons with a 3.76 crank. 454 pistons will not work with a 3.76 stroke crank. Just as 427 pistons will not work with a 454 4.00 stroke crankshaft.

If you use a 427 piston that is .030 bigger and a 3.76 stroke it is a 433 cubic inch.

I have a photo of the bottom end of the motor I built. Let me know if you want more pictures.

Hope that helps.

Kurt

Re: 427?
 

I was looking at a comparison chart and have a question and it may be stupid but...were all 427's solid lifter motors?

Re: 427?
 

No,the 427 L-36/390HP & LS-1/335HP were both Hydra lifter engines.

Re: 427?
 

No. Correct me if I am wrong but I believe that oval port (low horsepower) head motors came with hydraulic lifters and rectangular port (high horsepower) motors had solid lifters.

I ran a comp cams solid lifter camshaft with my motor and loved it. I could not afford a roller cam but I still wanted it to rev fast. I called comp cams and gave them all the information that they needed to help me pick the correct application for my motor. I highly suggest doing that unless you are going to build the motor 100% stock. They will need to know compression, intake, carb, power brakes, gears etc...

Re: 427?
 

[ QUOTE ]
No,the 427 L-36/390HP & LS-1/335HP were both Hydra lifter engines.

[/ QUOTE ]

What about the L68 400 HP tri-power motor? I believe that is hydraulic camshaft also. But not sure. https://www.yenko.net/ubbthreads/imag...lins/dunno.gif

Re: 427?
 

The 512 block was used for 69 427 and continued into 70 as a 454. however, the 427 was internally balanced and the 454 was externally balanced. Because of that, the crank, balancer and flywheel must be for the correct application.

Re: 427?
 

[ QUOTE ]
The 512 block was used for 69 427 and continued into 70 as a 454. however, the 427 was internally balanced and the 454 was externally balanced. Because of that, the crank, balancer and flywheel must be for the correct application.

[/ QUOTE ]

I've seen this before so I thought I would ask. What is the difference between internal and external balancing?

Re: 427?
 

External balance used extra counterweights cast into the back side of the harmonic balancer, and the flywheel. Internal used counterweights on the crank, only.