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gamedawg03 11-28-2012 01:05 PM

406 help
Hey im new to getiing a engine built i have a factory sbc 400 im getting it bored.30 over i am shopping around for a 406 rotating assembly i am looking for 12.1 compression i have a dart platinum eagle top end kit 215 64 ccheads dart intake what would be a good cam choice any info will b apprecited it will go in a 86 monte carlo ss it has 8.5 rear end 4.10 gears th350 trans with 3500 stall will be a sreet/strip car thanks

Custom10 11-28-2012 01:35 PM

You plan on 12:1 with cast iron heads? better have a huge cam in it, it wont like the street much.

gamedawg03 11-28-2012 01:49 PM

Oh no sry they are aluminum i already have brodix ik 200 heads but i was looking at the dart top end kit

gamedawg03 11-28-2012 01:59 PM

I was planning to mix 93 and 110

gamedawg03 11-28-2012 02:12 PM

I had a 383 in the car but the car was stolen. The 383 i bought complete it ran best time of 8.27 on 89 octane in 1/8 mile dnt no any specs on that motor just trying to do honework on this 400 before i spend money in wrong place

gamedawg03 11-28-2012 02:31 PM

How much does head porting on average run

gamedawg03 11-28-2012 02:46 PM

I have a victor junior intake and a demon 750dp would they work ok for this setup

gamedawg03 11-28-2012 03:08 PM

Yeah the heads are 64 cc yeah im new to the game i wanna learn as much as i can how and what do i need to cean up on the heads and scale of 1 to 10 how difficult is it for a amateur

vinniekq2 11-28-2012 05:40 PM

get your heads on a flow bench.2 reasons.if the flow numbers are good then you know your horse power potential,therefore easier to pick the matching parts,second reason,lots of heads are weak on the exhaust side, so they need porting on the exhaust side or you can compensate slightly with a split duration cam.

If you dont measure the flow and build the engine,later if you are not happy,you have no information to work with.That car will dip into the 11s with those heads stock out of the box.The quality job you do depends on the details you look after,,,,have fun with that car.I worked on a friends monte carlo and we made it go 14.1s with a near stock 400 and 2.73 gears. It also got decent mileage.

gamedawg03 11-28-2012 06:30 PM

Thanks for the info im going to take them to my machine shop and let him flow bench them

vinniekq2 11-28-2012 06:56 PM

phone the shop before you go,not all or many shops have a flow bench

gamedawg03 11-28-2012 07:09 PM

Yeah im going to take them to coupe performance out of covington ga

1Gary 11-29-2012 01:21 AM

Can I ask you about the 400 block??. Are you sure it is a good core??. Those are getting kind of rare. Especially on a 400 you don't want a bore and hone without the pistons in the hands of the machine shop and do not do that without torque plates.A extra step is to sonic check the bores because some are casted as thin wall blocks.You need to know you have a sound bottom end before you spend money on the top haft,don't you??. Don't you need to know you have a flat deck before you plot out heads and SCR's??. Here again the 400's trait isn't to have a used engine with flat decks.

I did see you said a factory 400.but I am not sire what you mean in saying that.Still most of what I posted still applies even if it is a brand new casting.

BTW-have you called Brodix and asked them how much to port good used clean castings??. I would bet money they have a killer porting program that would be hard to match. Even if you have to pay more,you get tons more back in return.

cobalt327 11-29-2012 02:32 AM


Originally Posted by gamedawg03 (Post 1616897)
Yeah im going to take them to coupe performance out of covington ga

They did a subframe for me a while ago. Did a good job. You run at Head Hunters?

gamedawg03 11-29-2012 08:14 AM

Yeah i was going to go last sunday i called mandrell he said aslong as its over 50 degrees he would have track open

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