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Difference between the 426 Hemi and 426 Street Wedge???
#1192829
03/07/12 01:02 PM
03/07/12 01:02 PM
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Joined: Jun 2010
Posts: 287
Iowa, US
oldsklharo
OP
enthusiast
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OP
enthusiast
Joined: Jun 2010
Posts: 287
Iowa, US
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Ok guys, I got some great advice and education in my other thread on the differences of the 392 and 426 Hemis......... Now can we discuss the differences between the 426 Hemi and the 426 Street Wedge???I have also found a Street Wedge that I may or may not try and buy. Any info would be much appreciated  Thanks, Mike
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Re: Difference between the 426 Hemi and 426 Street Wedge???
[Re: oldsklharo]
#1192832
03/07/12 02:32 PM
03/07/12 02:32 PM
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Joined: Jan 2003
Posts: 8,847
poplar bluff mo.
toplescuda
I Whine
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I Whine
Joined: Jan 2003
Posts: 8,847
poplar bluff mo.
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The 426 wedge is no closer to being a hemi motor then say a 413 400 440 383 the only thing the two motors share is number of cubic inches
the 426 based hemi is its own beast you cant even swap the cam 383,400,413,426w to a hemi
1970 barracuda convert. 1 of 59
1970 pro street A.A.R. clone (panther pink)
1971 charger
2015 hellcat challenger. Redline red
2014 quad cab 4x4 ram 8 speed hemi
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Re: Difference between the 426 Hemi and 426 Street Wedge???
[Re: toplescuda]
#1192834
03/07/12 02:42 PM
03/07/12 02:42 PM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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The difference being a 426 wedge is just a 440 with a smaller bore. The 426 wedge and the 426 hemi do share the same bore/stroke, take the same crank dimensions, etc. So you COULD put a set of 426 hemi pistons into a 426 wedge block and you COULD put a 426 hemi cam into a 426 wedge block. However that would all be useless because you can't put the 426 hemi heads on the 426 wedge block. The Hemi block has holes cast in the block where the exhaust pushrods go through. In a hemi, the exhaust pushrods come up through the block deck, through the coolant jacket, go through the head gasket, etc where on a wedge they don't. The top row of head bolts is also different, with the Hemi having the top row located further up, in an area not cast into a wedge block. Hemis also had oil drains cast into the block at each outer corner of the cylinder head mounting face, this area is not there on a wedge block. There was a company (stage v) that used to make Hemi heads to fit the wedge block, but with the availability of aftermarket hemi blocks, nobody really has a need for them these days.
Then of course hemis had cross bolted main caps, two bolts going up the bottom like a wedge, but also two bolts doing in from the side of the block.
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Re: Difference between the 426 Hemi and 426 Street Wedge???
[Re: oldsklharo]
#1192835
03/07/12 03:10 PM
03/07/12 03:10 PM
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Joined: Jan 2003
Posts: 5,138
East Aurora (Buffalo) NY
RoadRunner
master
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master
Joined: Jan 2003
Posts: 5,138
East Aurora (Buffalo) NY
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From what I know:
Blocks share same bell housing pattern, water pump housing, and oil pump mounting. Block is cross drilled for the mains, MW is not. Cranks will interchange, but the flange pattern at the flywheel is different. Cam is different. A MW cam may fit, but the MW pattern is for EIIEEIIE where the hemi is EIEIEIEI for intake and exhaust accuation.
Heads and intake are obvious. Exhaust manifolds or headers are different due to valve arrangment. I think the distributor is interchangable. Engine mounts are different.
Thats what I recall off the top of my head.
68 Road Runner (383/4speed, post car w/decor pkg) - Major Project
69 Road Runner w/472 Hemi & 4 speed.
70 Challenger R/T SE EF8 w/ V9J, U - A32 - Major Project
2023 Ford Mach 1
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Re: Difference between the 426 Hemi and 426 Street Wedge???
[Re: DaytonaTurbo]
#1192836
03/07/12 03:11 PM
03/07/12 03:11 PM
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Joined: Nov 2007
Posts: 21,825
Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,825
Kirkland, Washington
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Quote:
and you COULD put a 426 hemi cam into a 426 wedge block.
No, think about it, a hemi is EIEIEIEI the Wedges are EIIEEIIE
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Re: Difference between the 426 Hemi and 426 Street Wedge???
[Re: Pacnorthcuda]
#1192837
03/07/12 03:14 PM
03/07/12 03:14 PM
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Joined: Nov 2011
Posts: 2,154
Its a TRAP!
DARTH V8Я
Oh No!! I just had a moron attack!
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Oh No!! I just had a moron attack!
Joined: Nov 2011
Posts: 2,154
Its a TRAP!
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Quote:
Quote:
and you COULD put a 426 hemi cam into a 426 wedge block.
No, think about it, a hemi is EIEIEIEI the Wedges are EIIEEIIE
They sell hemi profile cams for wedges.
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Re: Difference between the 426 Hemi and 426 Street Wedge???
[Re: Pacnorthcuda]
#1192838
03/07/12 03:17 PM
03/07/12 03:17 PM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
Quote:
and you COULD put a 426 hemi cam into a 426 wedge block.
No, think about it, a hemi is EIEIEIEI the Wedges are EIIEEIIE
Yes but the cam physically fits. As I said this would be useless to you to do in a block that won't accept hemi heads.
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Re: Difference between the 426 Hemi and 426 Street Wedge???
[Re: DARTH V8Я]
#1192839
03/07/12 03:17 PM
03/07/12 03:17 PM
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Joined: Nov 2007
Posts: 21,825
Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,825
Kirkland, Washington
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Quote:
Quote:
Quote:
and you COULD put a 426 hemi cam into a 426 wedge block.
No, think about it, a hemi is EIEIEIEI the Wedges are EIIEEIIE
They sell hemi profile cams for wedges.
Yes they do, that refers the grind. The cams are configured differently, by neccessity.
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Re: Difference between the 426 Hemi and 426 Street Wedge???
[Re: Cab_Burge]
#1192840
03/07/12 03:22 PM
03/07/12 03:22 PM
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Joined: Nov 2009
Posts: 2,275
Desert Tracker
HYPER8oSoNic
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,275
Desert Tracker
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Quote:
60+ HP difference, two carbs VS one, Hemi head VS wedge and the list goes on 
Cab and Daytona Turbo are 100% correct. The 426 Street Wedge and the 426 Hemi share the basic foundations in engine block dimensions.. BUT ..
are designed differently from the head/intake and up. In a nutshell, the HEMI has a fortified RB block designed for higher output/higher rpm usage
due to the deep breathing Hemi heads. The 426 Street Wedge is a basic 4 barrel wedge motor, sort of like a .060-over 413, 9 to 1, maybe 9 to 5 comp motor. Nothing special, but still a good
basis for a GOOD street motor!! Cab's right about the 60+ HP difference and that's putting it mildly! At best there's a power difference of over 100HP! (426 Hemi in optimal tune - HEMI tuners were not many back then)
Last edited by HYPER8oSoNic; 03/07/12 03:28 PM.
"Stupidity is Ignorance on Steroids"
"Yeah, it's hopped to over 160" (quote by Kowalski in the movie Vanishing Point 1970 - Cupid Productions)
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Re: Difference between the 426 Hemi and 426 Street Wedge???
[Re: oldsklharo]
#1192842
03/07/12 03:47 PM
03/07/12 03:47 PM
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Joined: Dec 2007
Posts: 1,357
central Florida
VL21
pro stock
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pro stock
Joined: Dec 2007
Posts: 1,357
central Florida
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I have had 3 64 Plymouths with the 426S, and every one of them was a slug. Well, maybe not slugs, but a strong 383 would walk them, and I have had more than a few 64 383s too. Problem was the 426S was a mild motor, used the 413 New Yorker cam, had no better heads than the 383, etc. With better cam, heads and intake would have been a different story. Still, a factory 426 car would be a damn good starting point, more for the other stuff that came with the engine package. Think bigger (11") brakes, cop car(as good as it was) suspension (with front sway bar), HD cooling, and glam factor. Wish my 65 Coronet convertible was a 426S pkg... 
It takes gasoline to interest me.
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Re: Difference between the 426 Hemi and 426 Street Wedge???
[Re: Moparnut426]
#1192844
03/07/12 06:19 PM
03/07/12 06:19 PM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
I have heard of people welding in bosses inside the lifter valley to take the hemi studs, and putting a hemi head, and hemi cam in a 440. Dont know if its true, but I have heard that a few times from different people from other parts of the country. Id say it would be worth a shot if ya have a few "junk" 440 blocks laying around to test it out on. Im a decent enought cast welder that Id give it a shot. Heck you probly wouldnt really even need the extra bolts for head torque unless you were going for all out compression.
Kasey
I did talk to one guy on the phone one time who said he did just that. He told me about how he used to do it back in the 70's and 80's when you just couldn't find or afford a replacement hemi block. He described taking a 413 block, boring it .060 over to take stock 426 hemi pistons. Said he used the steel shim head gaskets and never had an issue not using the top row of head bolts. Said the hardest part was the exhaust pushrods. Needed to grind clear into the water jacket for clearance. Then heat up a piece of steel red hot and black smith it into shape and weld it in. Said the intake pushrods cleared with a small amount of grinding and needed to thread in some drain tubes from the corners of the head to the oil pan. He said back then you could get a junk 413 and a set of used stock bore hemi pistons for peanuts. Said he'd build one and run the hell out of it until the block started to let go, then build another one. Said he hasn't done one in years since the availability and affordability of repro hemi blocks. Would still be an interesting experiment.
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Re: Difference between the 426 Hemi and 426 Street Wedge???
[Re: Pacnorthcuda]
#1192845
03/07/12 06:33 PM
03/07/12 06:33 PM
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Joined: Jan 2003
Posts: 75,015
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,015
U.S.S.A.
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Quote:
Quote:
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and you COULD put a 426 hemi cam into a 426 wedge block.
No, think about it, a hemi is EIEIEIEI the Wedges are EIIEEIIE
They sell hemi profile cams for wedges.
Yes they do, that refers the grind. The cams are configured differently, by neccessity.
Yes that is true but one could physically put a hemi cam in a wedge and vise versa , it won't run but you can put it in there 
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Re: Difference between the 426 Hemi and 426 Street Wedge???
[Re: ProStock1320]
#1192851
03/08/12 11:12 AM
03/08/12 11:12 AM
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Joined: Jan 2003
Posts: 75,015
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,015
U.S.S.A.
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Quote:
Doesn't Stage V Engineering make Hemi conversion heads to use on a wedge block? I understand there is way more to it than that, but they are out there, right?
Yes they do , not very often but they do , it is not just a drop on and go though. You do need to still grind on the block for pushrod clearance, and you have to add oil drains to the pan. The upper row of head bolts is in the intake, this may actually be better than the valley studs? Then you need hemi pistons, that are a custom because the 440 is a .070 over hemi size not, including any overbore the 440 needs .
The hemi blocks aren't that expensive anymore to make using the conversion heads a viable option unless you have thousands of dollars into a 440 block in upgrade machining ...
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Re: Difference between the 426 Hemi and 426 Street Wedge???
[Re: HYPER8oSoNic]
#1192852
03/08/12 05:54 PM
03/08/12 05:54 PM
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Joined: Mar 2007
Posts: 12,008
Finally a HUSKER again
Moparnut426
I Live Here
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I Live Here
Joined: Mar 2007
Posts: 12,008
Finally a HUSKER again
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Heck you probly wouldnt really even need the extra bolts for head torque unless you were going for all out compression.
Kasey
... you seriously believe that ? ...
There is more than just installing the bosses , you first have to grind off the currnet casting bumps because the hemi botl is about half a hole up from the wedge threaded hole , you have to do something about the lower oil returns at both the front and back of the block on each bank back to the oil pan.
Then there is the exhaust pushrod tunnels , grind the 440 block and you hit water ...
 Well said John.
Laugh all ya want, I SERIOUSLY do believe they did that back in the day. If a machinist can build a TINY TINY version of any V8, they sure can figure out that small detail.
Hell Id try it for the wow factor alone.
That is if I had access to the parts to make it work, heads, and a lot of time.
Believe what ya want, I tend to think outside the box quite often, and have "figured" many things out that other shops have said is imposible.
Kasey
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Re: Difference between the 426 Hemi and 426 Street Wedge???
[Re: Moparnut426]
#1192855
03/08/12 06:07 PM
03/08/12 06:07 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
You win Mr Yuck!
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Re: Difference between the 426 Hemi and 426 Street Wedge???
[Re: Moparnut426]
#1192856
03/08/12 06:43 PM
03/08/12 06:43 PM
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Joined: Jan 2003
Posts: 75,015
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,015
U.S.S.A.
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Heck you probly wouldnt really even need the extra bolts for head torque unless you were going for all out compression.
Kasey
... you seriously believe that ? ...
There is more than just installing the bosses , you first have to grind off the currnet casting bumps because the hemi bolt is about half a hole up from the wedge threaded hole , you have to do something about the lower oil returns at both the front and back of the block on each bank back to the oil pan.
Then there is the exhaust pushrod tunnels , grind the 440 block and you hit water ...
Well said John.
Laugh all ya want, I SERIOUSLY do believe they did that back in the day. If a machinist can build a TINY TINY version of any V8, they sure can figure out that small detail.
Hell Id try it for the wow factor alone.
That is if I had access to the parts to make it work, heads, and a lot of time.
Believe what ya want, I tend to think outside the box quite often, and have "figured" many things out that other shops have said is imposible.
Kasey
I'm laughing at you thinking the bolt up there is only needed if the engine has high compression, I'm sure the engine would run without it but if you've ever read any of the threads on hemi intake leaks just overtightening the intake bolts is enough to cause a coolant leak , imaging what would happen if you tightened the intake bolts to the correct torque setting without that bolt there at all .
You want to make a hemi block out of a wedge block , go for it I'm sure it's been done in the past . Keep track of the hours it takes you . 
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Re: Difference between the 426 Hemi and 426 Street Wedge???
[Re: VL21]
#1192857
03/09/12 10:36 PM
03/09/12 10:36 PM
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Joined: Mar 2003
Posts: 1,301
Edgartown, MA/ Greene, ME
CharlieB
pro stock
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pro stock
Joined: Mar 2003
Posts: 1,301
Edgartown, MA/ Greene, ME
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Quote:
I have had 3 64 Plymouths with the 426S, and every one of them was a slug. Well, maybe not slugs, but a strong 383 would walk them, and I have had more than a few 64 383s too.
Problem was the 426S was a mild motor, used the 413 New Yorker cam, had no better heads than the 383, etc.
With better cam, heads and intake would have been a different story.
Still, a factory 426 car would be a damn good starting point, more for the other stuff that came with the engine package. Think bigger (11") brakes, cop car(as good as it was) suspension (with front sway bar), HD cooling, and glam factor.
Wish my 65 Coronet convertible was a 426S pkg...
Wow surprised you were beaten by a 383. I had a 64
426S 4 sp in a Polara in 1965 and no way would any stock 383 beat me. I did not have much trouble with the GTO or 396 ss, until the 375hp SS came out. Traded it for a 67 RT. Of course it was a Dodge which everyone knows was faster than the Plymouths  Wish I still had the Polara!
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