I was looking at going 521 stroker...
now im leaning towards punching the cylinders out .30 changing pistons to bump up the compression.
currently building a D1ve block it has d3 heads but this motor will be getting the c9 heads off my other motor with some cleanup.
thinking h beam rods, stock crank, forged pistons? not sure where the compression would be on a d1 block with c9 heads.
starting compression would determine my piston selection. id like to keep it in the 10:1 to 11:1 range and run on 91 octane possibly running a booster if needed.

looking at victor 460 intake.
with this cam kit http://www.summitracing.com/parts/cca-k34-241-5
and for the fun of it lets top it all off with a 150 shot.

still trying to figure out what pistons to use.

Both would be awesome. What is the cost difference? My last engine was a 460 at .30 over and it ran hard. New one is the 521.  What is the pros ans cons?

It seems like it would be cheaper for me to build the .30 over motor I could also forget about the 150 shot and just run my tunnel ram that would shave about 1000 bucks off the build.  It's a lake boat that will mostly be cruised except when I'm out running it against friends. 

Sounds like you have your answer. Now get on it! Summer is ah comin

Haha the motor in the boat is running good right now.  This is a build that'll go in next year. 

I was looking at going 521 stroker...
now im leaning towards punching the cylinders out .30 changing pistons to bump up the compression.
currently building a D1ve block it has d3 heads but this motor will be getting the c9 heads off my other motor
thinking h beam rods, stock crank, forged pistons? not sure where the compression would be on a d1 block with c9 heads.
starting compression would determine my piston selection. id like to keep it in the 10:1 to 11:1 range and run on 91 octane possibly running a booster if needed.

looking at victor 460 intake.
with this cam kit http://www.summitracing.com/parts/cca-k34-241-5
and for the fun of it lets top it all off with a 150 shot.

still trying to figure out what pistons to use.

A zero decked OEM 460 short block with flat top pistons and early heads will put you at about 11.75: 1 c/r.  The Keith Black Icon IC635 forged piston with 15ccs of dish will put you at about 10.5:1.  Frankly I think that's a bit steep for straight pump gas, but blending some 100LL could make it work if you're diligent about staying with it.

As far as shelf cams go, the one linked would suit such a combo well provided the port work is good.

Personally I'd opt for compression ratio just below 10:1 but budget 22cc dished pistons are in short supply at the moment (unless you opt for the 2404). Another option is to use a flat top pistons and ported D3VE's (9.9:1 c/r) but then you've the valve train mods to deal with for your selected camshaft....so it's a wash either way.

Advice worth listening to. LakesOnly, we spoke recently on the phone about the build on our BBF with a blower and 521 combo; appreciate your insight and am following it to a T.


Steve-O

Damn! I would LOVE to see that!

A zero decked OEM 460 short block with flat top pistons and early heads will put you at about 11.75: 1 c/r.  The Keith Black Icon IC635 forged piston with 15ccs of dish will put you at about 10.5:1.  Frankly I think that's a bit steep for straight pump gas, but blending some 100LL could make it work if you're diligent about staying with it.

As far as shelf cams go, the one linked would suit such a combo well provided the port work is good.

Personally I'd opt for compression ratio just below 10:1 but budget 22cc dished pistons are in short supply at the moment (unless you opt for the 2404). Another option is to use a flat top pistons and ported D3VE's (9.9:1 c/r) but then you've the valve train mods to deal with for your selected camshaft....so it's a wash either way.

I was looking at having the block decked but keeping the pistons. 020 below deck.  And running 15cc dish pistons.  As well as a .040 compressed head gasket thickness. 

If my calculations are correct that should bring it to around 10:1 I wouldn't mind splashing some 100ll into it.  Or even keeping race fuel on hand to add in at every fill up. 

I was looking at having the block decked but keeping the pistons. 020 below deck.  And running 15cc dish pistons.  As well as a .040 compressed head gasket thickness. 

If my calculations are correct that should bring it to around 10:1 I wouldn't mind splashing some 100ll into it.  Or even keeping race fuel on hand to add in at every fill up.

Uhm, no.

Too much quench distance? Maybe I'll just zero deck the block and run 22cc dished pistons.

I was always told .035" to .045" quench distance on a big block (and for that matter, long stroke small blocks). I feel that with the compression ratio you are going to end up with, this will be a seriously detonating nightmare.

This is just my opinion, I'm not a machinist by any stretch, but I dont feel you will be succesful opening things up that much.

GT

I was always told .035" to .045" quench distance on a big block (and for that matter, long stroke small blocks). I feel that with the compression ratio you are going to end up with, this will be a seriously detonating nightmare.

This is just my opinion, I'm not a machinist by any stretch, but I dont feel you will be succesful opening things up that much.

GT

Think my quench distance was .038 on this build. My bro seemed satisfied with that. Now gt says it is cool, double confidence now.

Lol. Yep, definitely not going eco friendly.

Good info on this thread.


Steve-O

Lol! If you ever bring up the words eco or gas mileage with your build then you are doing it wrong.

I don't know. ....

I was talking to a dude last week who bought a wrecked Eco-Boost pick up and was going to put it in his river boat.

I'm thinking that things going to rock.

GT

That would be a wicked motor in a sand rail. Might leave you torque deficient in a jet boat.


Steve-O

That would be a wicked motor in a sand rail. Might leave you torque deficient in a jet boat.


Steve-O

He's telling me 370 hp at well over 400ft/lbs of torque,  I think it's rated at 5,000 rpm,  the torque curve probably peaks at about 3,000 rpm though.  IDK.

The thing might kick ass.

GT

He's telling me 370 hp at well over 400ft/lbs of torque,  I think it's rated at 5,000 rpm,  the torque curve probably peaks at about 3,000 rpm though.  IDK.

The thing might kick ass.

GT

That would be a wicked motor in a sand rail. Might leave you torque deficient in a jet boat.


Steve-O

Put a gear box on it