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56chev100 10-20-2009 11:42 PM

427 HP q'S
1966 427 bored .06 over eagle forged racing rotating assembly 4.375 stroke and 6.385 rods with JE SRP 18cc Dome Piston (~10.5:1 w/ 118cc) heads. Perfect Circle or Mahle Plasma Premium Performance Rings. Clevite or King Competition Series Rod and Main Bearings. with patriot performance aluminum heads. 119cc combustion chamber. rectangle intake ports and round exhaust ports. 320cc intake runners. 2.25 intake valves and 1.88 exhaust valves. wiend tunnel ram intake with duall holley 450 or 600 cfm carbs. im not sure what would be a good cam but heads allow up to .7 lift. how much hp approx? and any cam suggestions?

techinspector1 10-21-2009 09:53 AM

Hmmm, 3200 bucks just for the heads....this could be a very expensive build.

BBCMudbogger 10-21-2009 11:03 AM

Will everything clear with a 4.375 stroke? Is there an off the shelf piston for that combo? Might find that 4.375" stroke pistons start out at about 4.5" bore.

1969NovaSS 10-21-2009 06:56 PM


Originally Posted by techinspector1
Hmmm, 3200 bucks just for the heads....this could be a very expensive build.

actually those heads are 1600 for a pair :thumbup:. Thats very reasonable for a bbc.

1969NovaSS 10-21-2009 07:41 PM

double post

56chev100 10-21-2009 11:33 PM

mudbogger yes those pistons come in a kit im purchasing from adperformance that is an all forged eagle racing kit that i can order .06 over. :thumbup:

yes tech inspector, nova's right there a pair for that price. but the engine is goin to cost me about 5500 after its done eventually i plan on supercharging it but that a couple years after i finish pilot school :D

so can any1 give me a ball park hp rating on that engine???

BBCMudbogger 10-22-2009 04:46 AM

Hmmm might have to pick one up myself!

56chev100 10-22-2009 09:23 PM

ya its a good deal at 1800.00 but can anyone please answer my post questions on approx. horsepower?

k-star 10-23-2009 05:17 AM

Do not buy those heads. they are the China casting heads that they re-work..

Spend a few hundred more and get a set of Edelbrocks,,,, you will thank me for it later.

Hp guess is just that, a guess. You can run the numbers on desk top dyno and get 575 hp...then strap that engine on a real calibrated dyno and pull 425 hp...

There are just way to many things that dictate what hp the engine is going to actually make.

I ahve a program that if you tell it the truth will get you with-in 3% of a calibrated dyno for HP,but i need way more info then you gave to even start entering numbers.

At 17 years old my question would be, how much HP do you need, and what do you need it for???


56chev100 10-23-2009 05:42 PM

well i think itl be more than that just cause it started off life as a 390hp engine and im boring it .06 over and stroking .35 in over stock and getting alumin big valve and runner heads i think im just hoping that droping that much money in it will get me mid 600's hp wise and its goin in a street/strip 1956 f100. even though im only 17 please dont underestimate me guys.

airboat 10-23-2009 05:50 PM

Sorry, Lousy mood!

56chev100 10-23-2009 11:36 PM

look man im not wanting to start crap with you ok im just tryin to learn as i go ok geez liten up

barnym17 10-24-2009 07:44 AM

Depending on head flow cam etc. you could end up between 375 and 800 hp it just all depends on choices made.The important ? first is what do you intend to use the truck for? strip only? street/strip, cruiser daily driver? this question must be answered then we can proceed from there.

56chev100 10-24-2009 11:32 AM

thanx barnym17 its goin in a street strip truck but its mainly gunna be on the street and its a 1956 f100 short bed stepside

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