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Re: Cheap stock stroke 400 makes 530 HP? [Re: justinp61] #3121968
02/16/23 10:21 AM
02/16/23 10:21 AM
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GY3 Offline
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The part 2 of this video is up where he bolts on a ported tunnel ram.

I'm anxiously awaiting the Street Dominator part 3 installment.


'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.

Re: Cheap stock stroke 400 makes 530 HP? [Re: rickseeman] #3121998
02/16/23 11:50 AM
02/16/23 11:50 AM
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S.E. Michigan
ZIPPY Offline
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Originally Posted by rickseeman
He had a small block in his 68 Barracuda bracket car. He built this 400 to go in it. And yes, he's 1/8 mile in Arkansas.


Aha, thanks for that. That's not the dude I was thinking of, then.

The youtuber I was thinking of had either a Dart or a Valiant, and his test track was something like 800 feet or other odd length.


Rich H.

Esse Quam Videri




Re: Cheap stock stroke 400 makes 530 HP? [Re: ZIPPY] #3122125
02/16/23 05:48 PM
02/16/23 05:48 PM
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Frostbitefalls MN (Rocky&Bullw...
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I have speculated that any 400 using a 3.52 stroke crank would be a very good match for a torqueflite equiped bracket car. The short stroke will allow consistancy , yet at up to 426(!!) Cubes still make serious power, enough for a 10.00 et 3300 lb car. Easy to drive, as dhifts won't be too soon on the 1/2 given a good gear choice.


8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
Re: Cheap stock stroke 400 makes 530 HP? [Re: gregsdart] #3122134
02/16/23 06:33 PM
02/16/23 06:33 PM
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Kentucky
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Dwayne Porter did a pretty straight forward 383 that made 500 hp. I have been able to duplicate it and it makes for a great 7.00/11.00 combo at #3400. However, I would that say that due to parts availability I'm not sure I would build another 383 but move in the direction that has already been mentioned- 400 based 4.375 bore/6.800 rod/offset ground 383 crank.

http://www.moparts.org/Tech/Archive/bb/25.html


'75 Plymouth Duster
Phase I 451 906/590/2-660 10.75/126
Phase II 451 Stage VI/590/1050 9.82/135
Phase III 383 906/Victor-Pump gas 11.30/119

"For by grace you have been saved through faith. And this is not your own doing; it is the gift of God,"
Re: Cheap stock stroke 400 makes 530 HP? [Re: clovis] #3122327
02/17/23 01:25 PM
02/17/23 01:25 PM
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Seattle, WA
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375inStroke Offline
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With big block strength, and a stroke shorter than a 350 Chevy, how can these things not rev to the Moon?

Re: Cheap stock stroke 400 makes 530 HP? [Re: 375inStroke] #3122343
02/17/23 02:16 PM
02/17/23 02:16 PM
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Originally Posted by 375inStroke
With big block strength, and a stroke shorter than a 350 Chevy, how can these things not rev to the Moon?

How high it revs will depend on the head flow and induction along with cam design. The short stroke and long rod ratio make the 400 gentle on it's guts at high rpm's even with heavy pistons and rods. Given the same basic induction and cam a small bore long stroke 59 383 (4.03 x 3.75) will rev higher than a .030" over, stock stroke 400 before it runs out of air, it's the overall cubic inches that draw a given amount of air, not the stroke.

Re: Cheap stock stroke 400 makes 530 HP? [Re: Scully] #3122359
02/17/23 03:05 PM
02/17/23 03:05 PM
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GY3 Offline
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It's fun to see a Mopar build out-perform what people think it should be making.

I see all these high dollar Indy Cylinder Head builds that Indy puts on it's Facebook page and it seems like they are all underperformers.


'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.

Re: Cheap stock stroke 400 makes 530 HP? [Re: GY3] #3122476
02/18/23 01:27 AM
02/18/23 01:27 AM
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Posts: 2,645
Stuttgart, Arkansas
rickseeman Offline OP
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Originally Posted by GY3
It's fun to see a Mopar build out-perform what people think it should be making.


I agree.


2011 Drag Pak Challenger
Re: Cheap stock stroke 400 makes 530 HP? [Re: Dragula] #3122556
02/18/23 03:06 PM
02/18/23 03:06 PM
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Romulus, MI
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Originally Posted by Dragula
We made that much with an Eddy Head 340+.030 mild street engine.


Now that I must see to believe

Re: Cheap stock stroke 400 makes 530 HP? [Re: GTS340] #3122774
02/19/23 11:47 AM
02/19/23 11:47 AM
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Nebraska
70VcodeCoronetRT Offline
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My favorite motor build I have even done is my 400 based 470. It's a mild street build. Ported eddys by D Porter, .540ish hydraulic roller, RPM Performer. That little motor is surprisingly a little powerhouse. RPMs like a small block. I would love to do a current version. With 240 Trick Flows and a little more cam.

Re: Cheap stock stroke 400 makes 530 HP? [Re: 70VcodeCoronetRT] #3122826
02/19/23 02:16 PM
02/19/23 02:16 PM
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Stuttgart, Arkansas
rickseeman Offline OP
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justmoparjoe did a dyno test recently as a part of this series on the Edelbrock RPM Performer but the Holley Street Dominator had a lot more power.


2011 Drag Pak Challenger
Re: Cheap stock stroke 400 makes 530 HP? [Re: 70VcodeCoronetRT] #3122880
02/19/23 06:01 PM
02/19/23 06:01 PM
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USA
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hudsonhornet7x Offline
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Originally Posted by 70VcodeCoronetRT
My favorite motor build I have even done is my 400 based 470. It's a mild street build. Ported eddys by D Porter, .540ish hydraulic roller, RPM Performer. That little motor is surprisingly a little powerhouse. RPMs like a small block. I would love to do a current version. With 240 Trick Flows and a little more cam.


I am building a 470 now with trick flow 270's and a mechanical flat tappet. I hope it works well.

Re: Cheap stock stroke 400 makes 530 HP? [Re: rickseeman] #3123036
02/20/23 11:12 AM
02/20/23 11:12 AM
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Originally Posted by rickseeman
justmoparjoe did a dyno test recently as a part of this series on the Edelbrock RPM Performer but the Holley Street Dominator had a lot more power.


Those Holley Street Dominators work way better than most people realize and have the advantage of fitting under most stock hoods.


'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.

Re: Cheap stock stroke 400 makes 530 HP? [Re: GY3] #3123090
02/20/23 03:09 PM
02/20/23 03:09 PM
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S.E. Michigan
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Originally Posted by GY3


I see all these high dollar Indy Cylinder Head builds that Indy puts on it's Facebook page and it seems like they are all underperformers.


While I have to agree the numbers on alot of them don't make them appear to be world beaters, some of those have been pretty helpful and encouraging
since there was really nowhere else to find anything like a dozen 572 Hemi builds intended for the street, with really deliberate compromises, to study
and then go talk to the builder about at a show.

I'd thanked Kenny for putting more specs out there on the magical book of faces, as it helps guys like me out quite a bit... and he said it was Indy ownership's idea, they wanted no secrets...
which is a very different business strategy than alot of others doing Hemis.


Rich H.

Esse Quam Videri




Re: Cheap stock stroke 400 makes 530 HP? [Re: 70VcodeCoronetRT] #3123208
02/20/23 10:59 PM
02/20/23 10:59 PM
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WI
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Originally Posted by 70VcodeCoronetRT
My favorite motor build I have even done is my 400 based 470. It's a mild street build. Ported eddys by D Porter, .540ish hydraulic roller, RPM Performer. That little motor is surprisingly a little powerhouse. RPMs like a small block. I would love to do a current version. With 240 Trick Flows and a little more cam.


I did a similar street build using OOTB Eddy heads and a street solid roller. !0.2:1 compression.Same intake and a Holley 800. I always say...it RPMs like a chainsaw and pulls like a freight train. It made 425 whp at 5500(could have easily spun to 6500) and over 500 ft lbs all the way up there. It lives in my 69 B'cuda with a 4 speed and 3:73s. Thing's a blast to drive!

Last edited by Dcuda69; 02/20/23 11:12 PM.
Re: Cheap stock stroke 400 makes 530 HP? [Re: Dragula] #3123227
02/21/23 12:07 AM
02/21/23 12:07 AM
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Atlanta, GA
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Originally Posted by Dragula
Originally Posted by rickseeman
I've been watching justmoparjoe do a stock stroke 400 build on youtube. Nothing special, 10:1, E-Street heads, Holley intake, 850 cfm Holley. He took it to the dyno and it made 530 HP? I was impressed. This is the dyno episode but the whole build is on there somewhere.

https://www.youtube.com/watch?v=cEHE-_Zho-M&t=2s


We made that much with an Eddy Head 340+.030 mild street engine.


Care to share the details on your 340 build? What cam did your run?

Re: Cheap stock stroke 400 makes 530 HP? [Re: mgoblue9798] #3123314
02/21/23 11:26 AM
02/21/23 11:26 AM
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Weddington, N.C.
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I don't know how streetable a 530 hp 340 would be, but back in the early 80's I had a heavy TRW 12:1 bottom end 340 with home ported W2's an Isky 255/260 @.050 oval track flat tappet with non roller rockers that probably made close to that.

It had a V gate shifter and a hemi 4 speed and 4.56 gears in a gutted 69 Dart, It wasn't hard to drive on the street at all back in the days when we had Sunoco 260 and 280 pump gas.

It gave most of the big block Chevelles and Camaros all they wanted to the point to where within a couple weeks of running it they would scurry away like cockroaches whenever the little Dart pulled in.

You only need about 285 cfm of head flow to hit 500 hp, with fuel injection and good valvetrain I don't think a 530 hp combo would be that difficult to come up with today.


WIZE

World's Quickest Diahatsu Rocky (??) 414" Stroker Small block Mopar Powered. 10.84 @ 123...and gettin' quicker!

https://www.youtube.com/watch?v=-mWzLma3YGI

In Car:

https://www.youtube.com/watch?v=PjXcf95e6v0
Re: Cheap stock stroke 400 makes 530 HP? [Re: hudsonhornet7x] #3123318
02/21/23 11:42 AM
02/21/23 11:42 AM
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Nebraska
70VcodeCoronetRT Offline
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Nebraska
Originally Posted by hudsonhornet7x
Originally Posted by 70VcodeCoronetRT
My favorite motor build I have even done is my 400 based 470. It's a mild street build. Ported eddys by D Porter, .540ish hydraulic roller, RPM Performer. That little motor is surprisingly a little powerhouse. RPMs like a small block. I would love to do a current version. With 240 Trick Flows and a little more cam.


I am building a 470 now with trick flow 270's and a mechanical flat tappet. I hope it works well.
You will love it!!!!

Re: Cheap stock stroke 400 makes 530 HP? [Re: justinp61] #3123350
02/21/23 12:48 PM
02/21/23 12:48 PM
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Shopping @ HoBo Fright
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Originally Posted by justinp61
Originally Posted by Dragula

We made that much with an Eddy Head 340+.030 mild street engine.


I'd like to see the recipe for that one too.

Make that 3


[img]https://i234.photobucket.com/albums/ee87/fast340six/sig%20pics/2840886-340SIX-1.jpg[/img]
VP of the MPM in New Orleans
73 Dart Sport 340/ 70 challenger vert. That may still get built, If I live long enough
Re: Cheap stock stroke 400 makes 530 HP? [Re: 340SIX] #3123651
02/22/23 12:29 PM
02/22/23 12:29 PM
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Holland MI Ottawa
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2boltmain Offline
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Calling this build Cheap is not accurate although compared to a full on race engine I guess that would be so. One big staple of an affordable build is the cam and lifters. The option of reliable flat tappet cam and lifter sets is pretty much gone which is a shame. Back in the day- all those differing affordable grinds from competing manufacturers and their quality was superb.


Keep old mopars alive.
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