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407ci W8 build getting close to dyno #3094552
11/16/22 12:33 AM
11/16/22 12:33 AM
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usp4u Offline OP
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R3 9.0 siamese
4.185 x 3.700
Diamond Piston 12.4CR
Bryant 3.70 crank
Early Brett W8s
2.19 Ti
1.60 Inconel
Stock cam bore
Predator 266/274 @ .050 .728"
Jesel Truck series rockers
Caliies Ultra Rods 6.000
598 intake-minor clean up and port match
Bob Book 4150

Waiting on Schoenfeld 2" dyno headers to show up next week

Plan was to hit it with a 250-275 wet shot

I know that intake is gonna hurt me.
I have one of Brett's big 420.2's but it don't want to cut it to fit until I get this thing running. And I don't own a 4500 anyhow.


Should be on a Stuska within a month. Wanna make a guess?

My hope is 700 @ 8000

If the power curve is gaining, will pull higher to nose-over

20221116_001026.jpg20221115_212709.jpg20221116_001324.jpg
Last edited by usp4u; 11/16/22 12:43 AM.
Re: 407ci W8 build getting close to dyno [Re: usp4u] #3094553
11/16/22 12:35 AM
11/16/22 12:35 AM
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usp4u Offline OP
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Good God posting pics here is like Trig problem. Jesus Christ.

Re: 407ci W8 build getting close to dyno [Re: usp4u] #3094590
11/16/22 09:00 AM
11/16/22 09:00 AM
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justinp61 Offline
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Very nice build. up

Re: 407ci W8 build getting close to dyno [Re: justinp61] #3094619
11/16/22 10:56 AM
11/16/22 10:56 AM
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So Near, Yet So Far
topside Offline
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Wow. Should do much better than 700, based on my 368" BattenW2 13.0:1 @ 640 - less lift, 850 CFM, 2" Stahls.
That's a lot of water control goin' on.

Re: 407ci W8 build getting close to dyno [Re: topside] #3094625
11/16/22 11:16 AM
11/16/22 11:16 AM
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pittsburghracer Offline
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Man I’m envious of some of these small block builds. Lots of pretty going on there. Good luck with it.


1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: 407ci W8 build getting close to dyno [Re: pittsburghracer] #3094631
11/16/22 11:34 AM
11/16/22 11:34 AM
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Tulsa, Oklahoma
340Cuda Offline
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700 HP should not be any trouble.

2+ HP per cubic inch would be expected.

Re: 407ci W8 build getting close to dyno [Re: 340Cuda] #3094633
11/16/22 11:46 AM
11/16/22 11:46 AM
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11secdart Offline
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Awesome ...love those big small blocks !!

Last edited by 11secdart; 11/16/22 11:46 AM.

68 Dart 367/904
92 D150 original owner
21 Ram 1500 Quad Cab, Big Horn , Hemi ,4x4
20 Acura RDX
16 Honda HRV
Re: 407ci W8 build getting close to dyno [Re: 340Cuda] #3094636
11/16/22 11:48 AM
11/16/22 11:48 AM
Joined: May 2004
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Taxes & Virus's R-US, NY
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That is going to make well over 700hp.....I figure 750 with a 4500, subtract maybe 16hp for the 4150 and 734hp is my guess...


'70 Cuda,...605 Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

'66 Barracuda AWB Stretched nose Blown 440 Car in build stage

'71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph
https://www.youtube.com/watch?v=Znuo3jMUXTk
Re: 407ci W8 build getting close to dyno [Re: usp4u] #3095884
11/20/22 08:42 PM
11/20/22 08:42 PM
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usp4u Offline OP
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Getting closer

2 x 3.5

20221120_202420.jpg
Last edited by usp4u; 11/20/22 08:43 PM.
Re: 407ci W8 build getting close to dyno [Re: usp4u] #3095979
11/21/22 10:36 AM
11/21/22 10:36 AM
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So. Burlington, Vt.
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fast68plymouth Offline
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I don’t see how that thing wouldn’t crush 700hp.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: 407ci W8 build getting close to dyno [Re: fast68plymouth] #3095988
11/21/22 10:51 AM
11/21/22 10:51 AM
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Posts: 3,579
Shelby Twp. Mi
HardcoreB Offline
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Very nice motor! Thanks for sharing. What did Brett think it would make? I'm sure it'll make well over 700HP.

Re: 407ci W8 build getting close to dyno [Re: HardcoreB] #3096006
11/21/22 11:27 AM
11/21/22 11:27 AM
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justinp61 Offline
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I'd think with the nitrous it'll be near 1000.

Re: 407ci W8 build getting close to dyno [Re: HardcoreB] #3096011
11/21/22 11:52 AM
11/21/22 11:52 AM
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usp4u Offline OP
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Originally Posted by HardcoreB
Very nice motor! Thanks for sharing. What did Brett think it would make? I'm sure it'll make well over 700HP.


Mid 700s

These were heads that Brett had done a long time ago prior to me getting them. When he was at my house last year, he recognized them.

This is my first W engine, so I'm trying to be conservative with my expectations.

Re: 407ci W8 build getting close to dyno [Re: usp4u] #3096024
11/21/22 12:22 PM
11/21/22 12:22 PM
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justinp61 Offline
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Originally Posted by usp4u
Originally Posted by HardcoreB
Very nice motor! Thanks for sharing. What did Brett think it would make? I'm sure it'll make well over 700HP.


Mid 700s

These were heads that Brett had done a long time ago prior to me getting them. When he was at my house last year, he recognized them.

This is my first W engine, so I'm trying to be conservative with my expectations.


On motor right?

Re: 407ci W8 build getting close to dyno [Re: justinp61] #3096059
11/21/22 01:50 PM
11/21/22 01:50 PM
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usp4u Offline OP
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Originally Posted by justinp61
Originally Posted by usp4u
Originally Posted by HardcoreB
Very nice motor! Thanks for sharing. What did Brett think it would make? I'm sure it'll make well over 700HP.


Mid 700s

These were heads that Brett had done a long time ago prior to me getting them. When he was at my house last year, he recognized them.

This is my first W engine, so I'm trying to be conservative with my expectations.


On motor right?


yes

Re: 407ci W8 build getting close to dyno [Re: usp4u] #3096449
11/22/22 11:54 PM
11/22/22 11:54 PM
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usp4u Offline OP
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First time taking a Sawzall to a new set of headers lol

signal-2022-11-22-21-12-05-111.jpgsignal-2022-11-22-20-47-41-666.jpg
Re: 407ci W8 build getting close to dyno [Re: usp4u] #3096525
11/23/22 10:54 AM
11/23/22 10:54 AM
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bronx n.y
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one bad fish Offline
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Originally Posted by usp4u
First time taking a Sawzall to a new set of headers lol

who made the header

Re: 407ci W8 build getting close to dyno [Re: usp4u] #3096539
11/23/22 11:38 AM
11/23/22 11:38 AM
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justinp61 Offline
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Originally Posted by usp4u
First time taking a Sawzall to a new set of headers lol



That was the first thing I did to my Hedmans.

Re: 407ci W8 build getting close to dyno [Re: justinp61] #3096547
11/23/22 12:02 PM
11/23/22 12:02 PM
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pittsburghracer Offline
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Cut off wheel on a grinder

8D20DD76-69B0-4322-B00D-9AFA47D051E2.jpeg01757E07-C8C7-4F98-8146-520D778585DF.jpeg9144E8C3-06DA-47C3-88CE-2435E127309E.jpeg91F4805B-7F31-4D44-89BB-0D4B5FC4DE92.jpeg

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time




Re: 407ci W8 build getting close to dyno [Re: one bad fish] #3096558
11/23/22 12:52 PM
11/23/22 12:52 PM
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usp4u Offline OP
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Originally Posted by one bad fish
Originally Posted by usp4u
First time taking a Sawzall to a new set of headers lol

who made the header


Schoenfeld

These are just a set of sprint car headers to run on the dyno. I dont need them to be pretty. whistle

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