anyone here ever built a 406 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

blindman · 01-01-2010, 02:19 AM

im thinking fuel injected pump gas torque monster

63 & 64 Bowties · 01-01-2010, 08:05 AM

blindman, I moved this for you to the engine & drivetrain section.
And, welcome to the forum from right up the road from ya.

cdowns · 01-01-2010, 08:20 AM

i've built some 406's in the 70's but they were all fords

Kateaux · 01-01-2010, 10:18 AM

If you are talking about a 400 SBC based engine, be sure to have plenty of radiator. They require about the same cooling as a big block.

K8O

72HULK · 01-01-2010, 07:03 PM

I am currently having one built. One of my buddies I work with is doing all of the work. I initially considered stroking the motor to 415 or 421 but I decided against it. Now I am going for internally balanced w/ 6" rods 10.5-11.0 to 1 CR and aluminum heads. It will be going in my 72 4x4.

884x4Sub · 01-02-2010, 01:57 AM

406 efi?......I thought about doing it with my 88 tbi Sub......found getting a tbi to work properly with a big power engine is a bit of a crapshoot.....and the aftermarket efi systems are pretty pricey(2Gs and up)......eventually I sold the whole truck and bought a carbed '85 that I can drop in a big power carb 406 in (smog) legally.

PhilaTruck · 01-04-2010, 12:09 AM

You'll like it well enough. Mine stays around 170 with new stock replacement radiator.

I was all over "other" induction systems. If you're not doing the work yourself, pick the system that your mechanic knows best.

Welcome to the board-

-Todd

Autometer · 01-04-2010, 07:14 PM

I'm building one too. I just need to put it together and get it dyno'ed.

Trick flow heads 2.100/1.6
Custom JE pistons to match heads
6.0 Eagle rods.
Stock stroke compstar crank
Isky solid roller
CC pro magnum 1.6 rockers
750 proform carb

Engine was going in a '78 Malibu but I'm consolidating my projects so the truck stays and gets the poweplant.

PhilaTruck · 01-04-2010, 09:16 PM

Jeez Autometer, what's the compression with those pistons and heads? Those combustion chambers look like 58s.

crapy67 · 01-04-2010, 09:27 PM

I built a 406 for my 71 nova this past spring, and it made 540hp at the crank, I ran it hard all summer long and the temp never got over 180 degrees even during the break in. Good luck with your build.

Autometer · 01-05-2010, 02:04 AM

Quote:

Originally Posted by PhilaTruck

Jeez Autometer, what's the compression with those pistons and heads? Those combustion chambers look like 58s.

Guessing on the piston CCs it came out to 12.75:1 but I haven't built it so I really don't know. The heads used to be 67 out of the box but they've been opened up and resurfaced a couple times in it's life time.

01-01-2010, 02:19 AM	#1
blindman Registered User Join Date: Dec 2009 Location: martinsville va Posts: 99	anyone here ever built a 406 im thinking fuel injected pump gas torque monster

01-01-2010, 08:05 AM	#2
63 & 64 Bowties and a few others Join Date: Jun 2007 Location: Blue Ridge Mountains of VA Posts: 5,638	Re: anyone here ever built a 406 blindman, I moved this for you to the engine & drivetrain section. And, welcome to the forum from right up the road from ya. __________________ Bill US Army Vet -193rd Infantry BlueRidgeMuscleCars.com “The greatness of a nation and its moral progress can be judged by the way its animals are treated” Gandhi

01-01-2010, 08:20 AM	#3
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: anyone here ever built a 406 i've built some 406's in the 70's but they were all fords __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

01-01-2010, 10:18 AM	#4
Kateaux Registered User Join Date: Sep 2007 Location: Dacula Georgia Posts: 57	Re: anyone here ever built a 406 If you are talking about a 400 SBC based engine, be sure to have plenty of radiator. They require about the same cooling as a big block. K8O __________________ 1958 3100 w/55 frontend and 55 Cameo Bed (in progress)

01-01-2010, 07:03 PM	#5
72HULK Registered User Join Date: Apr 2008 Location: Fresno, CA Posts: 16	Re: anyone here ever built a 406 I am currently having one built. One of my buddies I work with is doing all of the work. I initially considered stroking the motor to 415 or 421 but I decided against it. Now I am going for internally balanced w/ 6" rods 10.5-11.0 to 1 CR and aluminum heads. It will be going in my 72 4x4.

01-02-2010, 01:57 AM	#6
884x4Sub p p pullin' Join Date: Apr 2008 Location: oshawa ontario Posts: 373	Re: anyone here ever built a 406 406 efi?......I thought about doing it with my 88 tbi Sub......found getting a tbi to work properly with a big power engine is a bit of a crapshoot.....and the aftermarket efi systems are pretty pricey(2Gs and up)......eventually I sold the whole truck and bought a carbed '85 that I can drop in a big power carb 406 in (smog) legally. __________________ doug

01-04-2010, 12:09 AM	#7
PhilaTruck Right on the line, baby! Join Date: Oct 2003 Location: Phila, PA 19130 Posts: 1,486	Re: anyone here ever built a 406 You'll like it well enough. Mine stays around 170 with new stock replacement radiator. I was all over "other" induction systems. If you're not doing the work yourself, pick the system that your mechanic knows best. Welcome to the board- -Todd __________________ 83 GMC 406 th400/3.73 Eaton Truetrac posi, headers, x pipe, & racePros. Tubular control arms, lowering rear springs, caltracs. Still ugly, but getting built right, although slowly Click and scroll down for site vendors! Subscribe here!

01-04-2010, 07:14 PM	#8
Autometer Registered User Join Date: Apr 2004 Location: Houston. Posts: 75	Re: anyone here ever built a 406 I'm building one too. I just need to put it together and get it dyno'ed. Trick flow heads 2.100/1.6 Custom JE pistons to match heads 6.0 Eagle rods. Stock stroke compstar crank Isky solid roller CC pro magnum 1.6 rockers 750 proform carb Engine was going in a '78 Malibu but I'm consolidating my projects so the truck stays and gets the poweplant. Attached Images Last edited by Autometer; 01-04-2010 at 07:14 PM.

01-04-2010, 09:16 PM	#9
PhilaTruck Right on the line, baby! Join Date: Oct 2003 Location: Phila, PA 19130 Posts: 1,486	Re: anyone here ever built a 406 Jeez Autometer, what's the compression with those pistons and heads? Those combustion chambers look like 58s. __________________ 83 GMC 406 th400/3.73 Eaton Truetrac posi, headers, x pipe, & racePros. Tubular control arms, lowering rear springs, caltracs. Still ugly, but getting built right, although slowly Click and scroll down for site vendors! Subscribe here!

01-04-2010, 09:27 PM	#10
crapy67 White wall terror Join Date: Feb 2009 Location: Croydon, Pa. Posts: 152	Re: anyone here ever built a 406 I built a 406 for my 71 nova this past spring, and it made 540hp at the crank, I ran it hard all summer long and the temp never got over 180 degrees even during the break in. Good luck with your build.



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