HP estimate 406 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ole6320 · 01-21-2009, 02:37 PM

Its a 400 + .030, forged dome pistons, solid lifter cam and lifters, the specs are, .560/.570 lift, .268/.270 @.050. It has 441 heads with some port work done, 1.94 intake, 1.60 exhaust, valves, 1.5 wide body roller rockers, stud girdles, double roller chain, hi volume oil pump, miledon pan w/ baffles, victor jr. 2 intake manifold, 750 carb, what do you guys think its putting out, compression is around 12.5 to 1

nxtruck · 01-21-2009, 08:46 PM

How much porting, and by who? Without any more info, I'd guess around 440-460.

hotrod 80 · 01-21-2009, 11:17 PM

Nice set up . Change the heads and it will be alot more . A 210 AFR wil do wonders for that combo .

ole6320 · 01-22-2009, 10:22 AM

Thanks, im interested to see how the victor will do on the street, you think I might be better off with a performer rpm? or something of that sort

ProStreet71 · 01-22-2009, 11:42 AM

Why so much compression for the street? You will not be able to run pump gas with this much compression. You definitly need more head than what you have. That 1.94 valve is restricting it for sure. Like hotrod 80 said, the AFR 210 heads will do wonders for your motor. IMO they are the best out of the box head you can buy for the money. The 400 has plenty of low end torque so you can run the victor and never know you lost anything down low on a motor like this.

ole6320 · 01-22-2009, 01:11 PM

I have it set up to run on e-85 so thats why it has the high compression

primered_junk · 01-22-2009, 01:37 PM

The E-85, will work fine, not as good for making power as methanol, but it is awesome to see some one thinking out of the box. Ported 441's are not bad, but that valve size is killing your combo. I agree with NXtruck, somewhere in the 460 hp range. Very close to a combo I ran forever mine had less compression, and was a blast to drive on the street.

ole6320 · 01-22-2009, 02:17 PM

Yea Im excited to see how it is on the street, and plus e-85 is cheap aound here and can be found at alomsot every gas station. My truck is just going to smell like corn! I actually bought the motor as it is now for 1000, it was complete minus carb, which there is a company around here that sells and converts e-85 carbs for around 650 dollars with tuning, so thats not a bad deal I dont think

primered_junk · 01-22-2009, 02:38 PM

That is cool, keep us posted!

ole6320 · 01-24-2009, 12:59 PM

now onto the transmission, how much of a torque convertor do you think I should run, the rear end has 3.73 gears, trans cooler also? its a th350 that is getting rebuilt

shortbed70 · 01-24-2009, 01:14 PM

Street 22-2500 or drag 32-3600. Keep in mind depending on the torque output of your motor #s will vary. The vic intake won't really make power until around 2500 and your cam probably around the same or higher and get the biggest cooler you can fit.

djracer · 01-24-2009, 02:59 PM

I would lean towards a little looser convertor 3000 to 3200 I always run a trans temp gauge to watch the temp.

**crossy** · 01-25-2009, 07:44 PM

not meaning to be the 'doubter' as i agree with HP figures, but those heads are 76cc. what are those pistons to make 12.5 to 1. those piston'ratings' are based on a 64cc combustion chamber usually. crossy

PhilaTruck · 01-25-2009, 11:35 PM

76 or 80cc according to mortec-

Sounds like a cool project and one lumpy cam.

We don't get much e-85 here in Philly.

ole6320 · 01-26-2009, 06:28 PM

yea thanks guys, it should be a run motor, all I really need to do is get the e-85 carb, new fuel pump and she should be good to go, unless Im forgetting something! Gonna get it to the dyno here in the next month or two

**crossy** · 01-26-2009, 06:37 PM

Quote:

Originally Posted by PhilaTruck

76 or 80cc according to mortec-

Sounds like a cool project and one lumpy cam.

We don't get much e-85 here in Philly.

GOOD LORD Todd!!, you live right on top of 4 different refineries. Just run a siphon hose down the storm drain in front of your house and probably get hi-test for free

ole6320 · 01-26-2009, 06:43 PM

is there a way to tell what size cc they are? I know they have had some port work done to them

PhilaTruck · 01-26-2009, 06:58 PM

A machine shop can do that. Otherwise, it involves a level stand, a graduated pipette, and some liquid. My shop port-matched mine- some were bigger than others.

Crossy: So that's what that smell is!

Super73 · 01-26-2009, 08:48 PM

Quote:

Originally Posted by ole6320

the specs are, .560/.570 lift, .268/.270 @.050.

Do you have a company/grind number. I'd be curious to know what the intake closing point is. That would really determine dynamic compression and if it would be usable with pump gas.

ole6320 · 01-27-2009, 11:08 AM

I believe it is a crane cam, the guy I bought it from used it at the drag for three runs, he said it dynoed at 531 with e-85 in it

01-21-2009, 02:37 PM	#1
ole6320 Registered User Join Date: Dec 2008 Location: Golden Valley MN Posts: 18	HP estimate 406 Its a 400 + .030, forged dome pistons, solid lifter cam and lifters, the specs are, .560/.570 lift, .268/.270 @.050. It has 441 heads with some port work done, 1.94 intake, 1.60 exhaust, valves, 1.5 wide body roller rockers, stud girdles, double roller chain, hi volume oil pump, miledon pan w/ baffles, victor jr. 2 intake manifold, 750 carb, what do you guys think its putting out, compression is around 12.5 to 1

01-21-2009, 08:46 PM	#2
nxtruck Registered User Join Date: Jun 2006 Location: Jackson, Mo. Posts: 607	Re: HP estimate 406 How much porting, and by who? Without any more info, I'd guess around 440-460. __________________ Chris 1966 Chevy C10 LWB, 434 sbc, TH350, 12-bolt, factory suspension, pump gas 7.02 @ 95.8, 1.45 60' 1965 Chevy C10 LWB, 355 sbc, TH350, daily driver

01-21-2009, 11:17 PM	#3
hotrod 80 mini truck racer Join Date: Aug 2006 Location: Baytown , texas Posts: 3,010	Re: HP estimate 406 Nice set up . Change the heads and it will be alot more . A 210 AFR wil do wonders for that combo . __________________ 1949 5-window 1969 Camaro 1976 Chevy Luv yellow 1978 Chevy Luv Blue 1976 Chevy Luv Black 1979 Firebird Flooded in Harvey 1999 F350 Dually 2005 GMC Sierra 4.8 RCSB 2014 Explorer (wifes) My build :http://67-72chevytrucks.com/vboard/s...d.php?t=399148 Build #2: http://67-72chevytrucks.com/vboard/s...d.php?t=653583 Last edited by hotrod 80; 01-21-2009 at 11:18 PM.

01-22-2009, 10:22 AM	#4
ole6320 Registered User Join Date: Dec 2008 Location: Golden Valley MN Posts: 18	Re: HP estimate 406 Thanks, im interested to see how the victor will do on the street, you think I might be better off with a performer rpm? or something of that sort

01-22-2009, 11:42 AM	#5
ProStreet71 Registered User Join Date: Sep 2008 Location: Huntingdon,TN Posts: 95	Re: HP estimate 406 Why so much compression for the street? You will not be able to run pump gas with this much compression. You definitly need more head than what you have. That 1.94 valve is restricting it for sure. Like hotrod 80 said, the AFR 210 heads will do wonders for your motor. IMO they are the best out of the box head you can buy for the money. The 400 has plenty of low end torque so you can run the victor and never know you lost anything down low on a motor like this.

01-22-2009, 01:11 PM	#6
ole6320 Registered User Join Date: Dec 2008 Location: Golden Valley MN Posts: 18	Re: HP estimate 406 I have it set up to run on e-85 so thats why it has the high compression

01-22-2009, 01:37 PM	#7
primered_junk ASE master tech/machinist Join Date: May 2008 Location: Blue Mound Texas Posts: 303	Re: HP estimate 406 The E-85, will work fine, not as good for making power as methanol, but it is awesome to see some one thinking out of the box. Ported 441's are not bad, but that valve size is killing your combo. I agree with NXtruck, somewhere in the 460 hp range. Very close to a combo I ran forever mine had less compression, and was a blast to drive on the street. __________________ "I sit here and I pray in my broken down Chevrolet....."

01-22-2009, 02:17 PM	#8
ole6320 Registered User Join Date: Dec 2008 Location: Golden Valley MN Posts: 18	Re: HP estimate 406 Yea Im excited to see how it is on the street, and plus e-85 is cheap aound here and can be found at alomsot every gas station. My truck is just going to smell like corn! I actually bought the motor as it is now for 1000, it was complete minus carb, which there is a company around here that sells and converts e-85 carbs for around 650 dollars with tuning, so thats not a bad deal I dont think

01-22-2009, 02:38 PM	#9
primered_junk ASE master tech/machinist Join Date: May 2008 Location: Blue Mound Texas Posts: 303	Re: HP estimate 406 That is cool, keep us posted! __________________ "I sit here and I pray in my broken down Chevrolet....."

01-24-2009, 12:59 PM	#10
ole6320 Registered User Join Date: Dec 2008 Location: Golden Valley MN Posts: 18	Re: HP estimate 406 now onto the transmission, how much of a torque convertor do you think I should run, the rear end has 3.73 gears, trans cooler also? its a th350 that is getting rebuilt __________________ 1986 Chevy C-10 2WD Long Box 406 SBC 12.5/1 compression E-85 monster!

01-24-2009, 01:14 PM	#11
shortbed70 Registered User Join Date: Mar 2002 Location: Forney TX Posts: 4,512	Re: HP estimate 406 Street 22-2500 or drag 32-3600. Keep in mind depending on the torque output of your motor #s will vary. The vic intake won't really make power until around 2500 and your cam probably around the same or higher and get the biggest cooler you can fit. __________________ Troy 1965 Chevy Bagged,361 sbc,voodoo cam,1.5 full roller rockers,patriot 185cc vortec heads 2.02-1.60,vortec weiand polished intake,demon carb my truckhttp://67-72chevytrucks.com/vboard/s...d.php?t=332884 Big Red Dog build http://67-72chevytrucks.com/vboard/s...d.php?t=572274

01-24-2009, 02:59 PM	#12
djracer Registered User Join Date: Feb 2001 Location: Wetumpka, Al, U.S. Posts: 8,891	Re: HP estimate 406 I would lean towards a little looser convertor 3000 to 3200 I always run a trans temp gauge to watch the temp. __________________ Kevin Special Thanks to All who have helped on the TRUCK! My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4 So Far my best Times are: Motor only: 6.44 1/8 @ 104.13 10.39 1/4 @ 125.83 Nitrous Times: 5.785 1/8 @ 118.65 with a 1.336 60ft 9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!

01-25-2009, 07:44 PM	#13
crossy Oh,you can't buy that new Join Date: Apr 2000 Location: Pennsville,N.J. 08070, USA Posts: 2,039	Re: HP estimate 406 not meaning to be the 'doubter' as i agree with HP figures, but those heads are 76cc. what are those pistons to make 12.5 to 1. those piston'ratings' are based on a 64cc combustion chamber usually. crossy __________________ "been there, done that, ruined the T-shirt". 2007 LBZ GMC Sierra, ECSB 2006 LM7 RCSB Silverado 98 Vortec project. 94,3500,6.5L 4L80 81 SWB GMC POS finally gone 73 Pinto, stock, w/CragarSS's-eww LOTS of Cummins trucks.

01-25-2009, 11:35 PM	#14
PhilaTruck Right on the line, baby! Join Date: Oct 2003 Location: Phila, PA 19130 Posts: 1,486	Re: HP estimate 406 76 or 80cc according to mortec- Sounds like a cool project and one lumpy cam. We don't get much e-85 here in Philly. __________________ 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!

01-26-2009, 06:28 PM	#15
ole6320 Registered User Join Date: Dec 2008 Location: Golden Valley MN Posts: 18	Re: HP estimate 406 yea thanks guys, it should be a run motor, all I really need to do is get the e-85 carb, new fuel pump and she should be good to go, unless Im forgetting something! Gonna get it to the dyno here in the next month or two __________________ 1986 Chevy C-10 2WD Long Box 406 SBC 12.5/1 compression E-85 monster!



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01-26-2009, 06:43 PM	#17
ole6320 Registered User Join Date: Dec 2008 Location: Golden Valley MN Posts: 18	Re: HP estimate 406 is there a way to tell what size cc they are? I know they have had some port work done to them __________________ 1986 Chevy C-10 2WD Long Box 406 SBC 12.5/1 compression E-85 monster!

01-26-2009, 06:58 PM	#18
PhilaTruck Right on the line, baby! Join Date: Oct 2003 Location: Phila, PA 19130 Posts: 1,486	Re: HP estimate 406 A machine shop can do that. Otherwise, it involves a level stand, a graduated pipette, and some liquid. My shop port-matched mine- some were bigger than others. Crossy: So that's what that smell is! __________________ 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!

01-27-2009, 11:08 AM	#20
ole6320 Registered User Join Date: Dec 2008 Location: Golden Valley MN Posts: 18	Re: HP estimate 406 I believe it is a crane cam, the guy I bought it from used it at the drag for three runs, he said it dynoed at 531 with e-85 in it __________________ 1986 Chevy C-10 2WD Long Box 406 SBC 12.5/1 compression E-85 monster!

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