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408 vs 426 small blocks #1224976 04/30/12 07:35 PM 04/30/12 07:35 PM
Joined: Aug 2008 Posts: 123 right here 1 1BADDUSTER OP member
1BADDUSTER OP member 1 Joined: Aug 2008 Posts: 123 right here	Hey, thinking about a new stroked 360 build. I know a lot of times guys like to stick with the 4 inch stroke. Looking to build something with 500 and up horsepower. Would like to have 10.5:1 or 11:1 compression and use a 150-200 shot of n20. I also understand that the pistons hughes uses in the 426 kit are not recommended for n20. Is there another option here? What are some of your thoughts on the pros and cons. Here is an article with a 426 build in a valiant that got me thinking. http://www.moparmusclemagazine.com/techa...ap/viewall.html

Re: 408 vs 426 small blocks [Re: 1BADDUSTER] #1224977 04/30/12 07:42 PM 04/30/12 07:42 PM
Joined: Nov 2004 Posts: 4,330 Lynchburg, VA Leon441 master
Leon441 master Joined: Nov 2004 Posts: 4,330 Lynchburg, VA	Just me, but, I would not buy a stroker in kit form if I were going to spray. For one you are wanting to make 700HP total. It can be done but, you can't make any boo boos or your block will go crunch clunk. Leon Career best 8.02 @ 169 at 3050# and 10" tires small block power.

Re: 408 vs 426 small blocks [Re: Leon441] #1224978 04/30/12 09:28 PM 04/30/12 09:28 PM
Joined: Feb 2009 Posts: 207 People's Republic of Mass. B Belvedere2 enthusiast
Belvedere2 enthusiast B Joined: Feb 2009 Posts: 207 People's Republic of Mass.	For that kind of hp why not build an N/A engine? That many cubes on a W8/9 head? You want compression so use it.

Re: 408 vs 426 small blocks [Re: Belvedere2] #1224979 04/30/12 10:40 PM 04/30/12 10:40 PM
Joined: Jan 2003 Posts: 6,144 Melbourne , Australia LA360 master
LA360 master Joined: Jan 2003 Posts: 6,144 Melbourne , Australia	I would agree with Leon, get a Nitrous specific piston, especially if you are a nitrous novice. Alan Jones

Re: 408 vs 426 small blocks [Re: 1BADDUSTER] #1224980 04/30/12 10:43 PM 04/30/12 10:43 PM
Joined: Oct 2010 Posts: 2,408 Ambridge, Pa. R rickraw top fuel
rickraw top fuel R Joined: Oct 2010 Posts: 2,408 Ambridge, Pa.	call ryan j.

Re: 408 vs 426 small blocks [Re: rickraw] #1224981 05/01/12 07:01 PM 05/01/12 07:01 PM
Joined: Oct 2011 Posts: 3,036 bean town ....Ca W WHITEDART master
WHITEDART master W Joined: Oct 2011 Posts: 3,036 bean town ....Ca	DONT THINK ABOUT IT or talk about it just spray it. dont use good part in a stock block. that way when it breaks you are not MAY THE SPRAY BE WITH YOU MY FRIEND In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb

Re: 408 vs 426 small blocks [Re: rickraw] #1224982 05/01/12 08:18 PM 05/01/12 08:18 PM
Joined: Dec 2005 Posts: 252 St.Louis, Mo. M mokid enthusiast
mokid enthusiast M Joined: Dec 2005 Posts: 252 St.Louis, Mo.	Quote: call ryan j. Just call anyone else, Or just ask the homo phobic Leon. Maybe he can deal on some parts.

Re: 408 vs 426 small blocks [Re: mokid] #1224983 05/01/12 09:40 PM 05/01/12 09:40 PM
Joined: Oct 2010 Posts: 2,408 Ambridge, Pa. R rickraw top fuel
rickraw top fuel R Joined: Oct 2010 Posts: 2,408 Ambridge, Pa.	why is that?????

Re: 408 vs 426 small blocks [Re: rickraw] #1224984 05/01/12 11:40 PM 05/01/12 11:40 PM
Joined: Oct 2007 Posts: 3,978 Hilltown Pa 1967dartgt master
1967dartgt master Joined: Oct 2007 Posts: 3,978 Hilltown Pa	Mokid does not like Ryan or Leon for some reason. Brett Miller W9 cnc'd heads STR Chassis fabraction

Re: 408 vs 426 small blocks [Re: 1BADDUSTER] #1224985 05/02/12 12:35 AM 05/02/12 12:35 AM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	One good option you might want to look at is dealing with your machinist on the parts. Often he can get a better deal than kit suppliers and you have more options when he is putting it together ( the parts that is ) for you. I am putting together 700 HP 408 blower motor using a stock 360 block. The block sonic tested good. half filled, Milodon steele 4 blt caps, Scatt forged crank, Eagle forged H beams, Icon blower pistons. I got a better $ deal from my machinist, than a kit supplier using basically the same parts. Another plus is that your machinist has more of an investment in making sure the parts are matched correctly so it will live. 7188731-rodclearance.jpg (57 downloads) Fastest 300

Re: 408 vs 426 small blocks [Re: 1967dartgt] #1224986 05/02/12 09:03 PM 05/02/12 09:03 PM
Joined: Dec 2005 Posts: 252 St.Louis, Mo. M mokid enthusiast
mokid enthusiast M Joined: Dec 2005 Posts: 252 St.Louis, Mo.	Quote: Mokid does not like Ryan or Leon for some reason. Bingo

Re: 408 vs 426 small blocks [Re: mokid] #1224987 05/02/12 09:24 PM 05/02/12 09:24 PM
Joined: Jan 2003 Posts: 9,146 Now - Port Orange,Fla. Former... MIKES_DUSTER master
MIKES_DUSTER master Joined: Jan 2003 Posts: 9,146 Now - Port Orange,Fla. Former...	Quote: Quote: Mokid does not like Ryan or Leon for some reason. Bingo Whats the reason/reasons??

Re: 408 vs 426 small blocks [Re: MIKES_DUSTER] #1224988 05/02/12 09:33 PM 05/02/12 09:33 PM
Joined: Aug 2008 Posts: 123 right here 1 1BADDUSTER OP member
1BADDUSTER OP member 1 Joined: Aug 2008 Posts: 123 right here	i appreciate any of the good feedback guys. I was looking more for a discussion on the benefits of extra stroke and if it was worth it etc. hp and tq differences between the 2.

Re: 408 vs 426 small blocks [Re: 1BADDUSTER] #1224989 05/02/12 09:40 PM 05/02/12 09:40 PM
Joined: Mar 2007 Posts: 3,300 Northern Indiana Dunnuck Racing master
Dunnuck Racing master Joined: Mar 2007 Posts: 3,300 Northern Indiana	You usually get the same HP with either stroke and the bigger the stroke the lower the rpm it will happen. I like that you can make the same power at more reasonable rpm levels. Just my Keith www.dunnuckracing.com

Re: 408 vs 426 small blocks [Re: Dunnuck Racing] #1224990 05/02/12 09:58 PM 05/02/12 09:58 PM
Joined: Jan 2003 Posts: 9,670 Lima, Peru domingo EL Master
domingo EL Master Joined: Jan 2003 Posts: 9,670 Lima, Peru	Quote: You usually get the same HP with either stroke and the bigger the stroke the lower the rpm it will happen. I like that you can make the same power at more reasonable rpm levels. Just my Keith but also higher piston speed.

Re: 408 vs 426 small blocks [Re: domingo] #1224991 05/02/12 10:02 PM 05/02/12 10:02 PM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	Quote: Quote: You usually get the same HP with either stroke and the bigger the stroke the lower the rpm it will happen. I like that you can make the same power at more reasonable rpm levels. Just my Keith but also higher piston speed. Piston speed stays about the same because you are now gonna turn less RPM. It is pretty much a wash in near sqaure engines. I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: 408 vs 426 small blocks [Re: domingo] #1224992 05/02/12 10:03 PM 05/02/12 10:03 PM
Joined: Mar 2007 Posts: 3,300 Northern Indiana Dunnuck Racing master
Dunnuck Racing master Joined: Mar 2007 Posts: 3,300 Northern Indiana	Quote: Quote: You usually get the same HP with either stroke and the bigger the stroke the lower the rpm it will happen. I like that you can make the same power at more reasonable rpm levels. Just my Keith but also higher piston speed. Still not as hard on parts as a real high rpm stock stroke engine would be,the valvetrain is more stable due to less rpm. Biggest killer of engine in my opinion. www.dunnuckracing.com

Re: 408 vs 426 small blocks [Re: domingo] #1224993 05/02/12 10:17 PM 05/02/12 10:17 PM
Joined: Oct 2008 Posts: 458 Michigan BPE mopar
BPE mopar Joined: Oct 2008 Posts: 458 Michigan	Quote: Quote: You usually get the same HP with either stroke and the bigger the stroke the lower the rpm it will happen. I like that you can make the same power at more reasonable rpm levels. Just my Keith but also higher piston speed. You're right but think about it like this.. Let's say a 4" stroke makes peak power at 6500 rpm that's 72.2 ft. per sec. Now put a 4.250" stroke in it ans say it makes peak power at 6200 rpm, that's 73.2 ft. per sec. Not much difference huh. Will also have more torque to get the car moving. Less convertor and gear needed. Rod

Re: 408 vs 426 small blocks [Re: BPE] #1224994 05/03/12 12:09 AM 05/03/12 12:09 AM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	Quote: Quote: Quote: You usually get the same HP with either stroke and the bigger the stroke the lower the rpm it will happen. I like that you can make the same power at more reasonable rpm levels. Just my Keith but also higher piston speed. You're right but think about it like this.. Let's say a 4" stroke makes peak power at 6500 rpm that's 72.2 ft. per min. Now put a 4.250" stroke in it ans say it makes peak power at 6200 rpm, that's 73.2 ft. per min. Not much difference huh. Will also have more torque to get the car moving. Less convertor and gear needed. Rod Whatever a 4 inch stroke 4.06 bore motor will make at 6500 a 4.25 stroke 4.06 bore motor will make at 6112 or so and piston speed is even closer. You also get a lighter reciprocateing mass that translates in to faster ET I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: 408 vs 426 small blocks [Re: HotRodDave] #1224995 05/03/12 12:17 AM 05/03/12 12:17 AM
Joined: Jan 2003 Posts: 10,010 Frostbitefalls MN (Rocky&Bullw... gregsdart I Live Here
gregsdart I Live Here Joined: Jan 2003 Posts: 10,010 Frostbitefalls MN (Rocky&Bullw...	Putting money into a stock block and then wanting to spray it makes me nervous. What is the life span of a stock block with your goals in mind? 8..603 156 mph best, 2905 lbs 549, indy 572-13, alky

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