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scj iron heads

Post  emptypockets on August 12th 2012, 9:57 pm

im new to bbf stuff got a set off door-e heads for free want to know if they will work on 1973 429 with stock bottom end.or do i have to get differant pistons with differant valve relif's
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Re: scj iron heads

Post  res0rli9 on August 12th 2012, 10:04 pm

? 1. Yes 2. Yes but not with big cam


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Post  emptypockets on August 12th 2012, 11:09 pm

the 429 has edlbrock performer rpm cam.duration @ .050" 234/244 lift .556"/.581" would this be considered to big
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Re: scj iron heads

Post  466cj on August 12th 2012, 11:51 pm

Be better on a larger engine. Most of the gain will be at higher RPMs. Converter and gear would help. Some bowl blending and clean up will help too. Heads will need to be set up for your cam and you will have to check the piston to valve clearance.

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Re: scj iron heads

Post  rmcomprandy on August 12th 2012, 11:53 pm

emptypockets wrote:im new to bbf stuff got a set off door-e heads for free want to know if they will work on 1973 429 with stock bottom end.or do i have to get differant pistons with differant valve relif's

YES ... if the cam is small enough for the intake valves to radially clear the piston intake notches, you will increase your compression ratio around a point and a half if you have 73 heads now.

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Post  emptypockets on August 13th 2012, 12:00 am

i'm running d3ve a2a right now. engine is in mud truck 1966 international pickup,c6,headers,6.72 gears,44" tires. usally beating wide open. going to buy converter this week. also have c9ve heads i home ported ex side would i benifit from these better
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Re: scj iron heads

Post  dfree383 on August 13th 2012, 12:08 am

In a heavy vehical and small CID the ported C9's will go better, they have alot better port velocity.
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Post  emptypockets on August 13th 2012, 12:13 am

if i upped cid above 460 or need stroker kit they will work good. like to build something fresh this winter
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Re: scj iron heads

Post  dfree383 on August 13th 2012, 12:14 am

if you have the C9's bolt them on the 429...... Use the Iron CJ's for a stroker they will do better on that.
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Post  emptypockets on August 13th 2012, 12:21 am

thanks for input. gonna have to save some loot and build something big
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Re: scj iron heads

Post  466cj on August 13th 2012, 12:40 am

emptypockets wrote:i'm running d3ve a2a right now. engine is in mud truck 1966 international pickup,c6,headers,6.72 gears,44" tires. usally beating wide open. going to buy converter this week. also have c9ve heads i home ported ex side would i benifit from these better

Got confused with your other post though you had C9's on it. Given what you are doing even with a 429 the iron CJ's be worth it. The CR boost will help that cam a lot. Put a 3,500 stall converter in it, and a Victor intake and let it eat. Just make sure you get a good transmission cooler on there.

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Post  emptypockets on August 13th 2012, 8:10 am

i have d3ve a2a heads on it. have c9s on shelf. my pistons might work with door-e heads and the cam im running. i got to check clearances though.
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Re: scj iron heads

Post  IDT-572 on August 13th 2012, 12:01 pm

For the SCJ's to work better than the C9's your going to need to cam and converter it to work with the SCJ's air flow.

Get the combo off a (little) and it will perform as good as the C9's, way off it will be a pig, but get it right and it will make big power.

But to get the engine in the rpm range the heads want to be in at 429 cubic inch some intake runner length change will be needed.
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Post  emptypockets on August 13th 2012, 12:41 pm

i'm planning on getting stall converter around 3800 this week. i'll try it and see how it goes.
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Re: scj iron heads

Post  bbf-falcon on August 13th 2012, 8:06 pm

That ole Farmall truck is cool as hell brother. I likey Very Happy Great color choice also Smile

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Post  emptypockets on August 13th 2012, 9:28 pm

thanks bbf-falcon, unique things are great. the falcon looks bad*** yellow
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