Power estimate

Just to get opinions from those that know more than me. (I'm grabbing a copy of the build sheet some time next week.)The rebuilt engine has :

Edited by ZCowher - 13-April-2016 at 6:54AM

Nuggets wrote: You don't port valves....you only port ports/runners cam seems very mild, intake isn't anything fancy its just a reduced weight version of stock, your pistons and rings aren't the only thing to consider when checking CR you need the HG compressed thickness, head skim if any and deck height as all things changed, same with over size or stock pistons

The engine came out of a 71 mercury Cougar

http://shop.advanceautoparts.com/p/spartan-atk-engines-cylinder-head-remanufactured-2f38/99980455-P?searchTerm=cylinder+head#

Probably safer to say 9:5 to 1 then. Maybe I'll just bum a compression tester from the school tonight and find out for sure. lol 

Eddy performer intake... you DID get the one for 2v heads, right? One for 4v heads will have a SERIOUS port mismatch.

Bumps it up about .2 from a quick calculation....not a huge amount but still will make a difference if you're close to the limit

I'd think on a proper rebuild it should be zero decked....depends whats been done though, if it has been then you will see a .2 increase in CR 

i just noticed this... but isn't the head on the top a sb chevy? sure looks like it to me

 

Nuggets wrote: I'd think on a proper rebuild it should be zero decked....depends whats been done though, if it has been then you will see a .2 increase in CR

As Big Bird said.... you will not increase compression with a larger bore.

First off, it's a barely measurable amount. You're not increasing volume that much.

Second, even though you are technically allowing more air in the cylinder, you also have a LARGER cylinder. So there is no increase in compression.

Piston rings do not go all the way to the top of the cylinder. When the piston is all the way up, you are still compressing air in a larger area.

So the minimal extra air you're taking in, is also being compressed in a larger container. They negate each other. You get no compression benefits.

As for the original poster's question.... I would feel your setup, if it's about 9.5:1, would be about 300 hp.

Big Bird wrote: Eddy performer intake... you DID get the one for 2v heads, right? One for 4v heads will have a SERIOUS port mismatch. Your 1406 is more of a "slap-it-on-and-it-runs-better-than-stock-without-any-fuss-fidgeting-or-tuning" carb than a high-performance carb. Not a problem, but you are leaving some performance on the table. I have the same one because I didn't feel like dealing with a Holley and couldn't find a 4300. Boring the block 30 over doesn't add power, and doesn't add compression. It's done to clean up the cylinders for a rebuild. The new pistons are where you would add compression. Don't be too down on the open chambers, if you will be driving on the street, and the engine was built for open heads, you will never know the difference.

It is a 2v intake for sure. As far as the CAM goes I think I read the page correctly but the part number is definitely MC1733 and its a melling cam  sold by engine pro.
What kind of torque numbers ?


Edited by ZCowher - 13-April-2016 at 5:15PM

californiajohnny wrote: "torque numbers" you guys don't happen to have a chassis dyno at the school do ya???

Rockatansky wrote: 2V heads only came as open chamber in the US   AUS got closed chamber heads to reduce the chamber volume to match the 302 cu in displacement   'Aussie' closed chamber heads came off of 302C's

Edited by Nuggets - 14-April-2016 at 12:38PM

By my calculations, and speaking to the machine shop I had it at, it is 10:1 compression