426" 651hp on 91 pump gas with 12.75:1 SB street/strip build
#2473363
03/28/18 03:38 PM
03/28/18 03:38 PM
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Joined: Feb 2004
Posts: 2,073 Tulsa, Ok
WadeMetzinger
OP
top fuel
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OP
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Joined: Feb 2004
Posts: 2,073
Tulsa, Ok
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I thought I’d share details about a few of my customer builds. 426" 651hp 91 pump gas 12.75:1 compression Small Block Street/strip Motor 340 X block with splayed billet main caps and ARP fasteners, bushed lifters, decked/squared to 9.585, align honed, stroker clearanced (machine work performed by DRAM Dan Costello (RIP) at Performance Only in Florida) 360-1 Indy heads ported by Dwayne Porter, with Harland Sharp rockers, PAC-1325 springs K1 4.125 stroke crank with Chevy rod journals Callies Compstar H-beam rods 6.200” Diamond Custom forged pistons 4.060 bore, 1.308 comp height, Valve relief volume -6.7 Indy 360-1 Intake also ported by Dwayne Porter Hughes Engines custom street/strip billet roller cam .656/.672 269/275 108 LSA installed at 105 and solid roller lifter designed specifically for this build with 12.75:1 by Dave Hughes (Dave actually spec’d the compression, I ordered pistons after we designed the cam for this motor) ProSystems custom built 4150 carb TTI headers for E body Made 651 hp and 585 torque on the Dyno with 91 octane pump gas, will make 700+ with race fuel and more timing (Dyno’d with only 29 degree timing) I was really nervous about the 12.75:1 compression but I decided to trust Dave and his years of knowledge and ended up very pleased. Our goal was 650hp with 91 pump gas and the use is 70% street and 30% strip. Link to all the build pictures: 426 Build pictures
Wade Metzinger 918-809-0987 71 Cuda 9.28@145 -1s, Pglide 68 Cuda 10.64@124 1.45 60's 318->390 eddys Moparts discount code on WIX - moparts www.Filter1.com
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Re: 426" 651hp on 91 pump gas with 12.75:1 SB street/strip build
[Re: RATTRAP]
#2473414
03/28/18 05:38 PM
03/28/18 05:38 PM
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Joined: Feb 2004
Posts: 2,073 Tulsa, Ok
WadeMetzinger
OP
top fuel
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OP
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Joined: Feb 2004
Posts: 2,073
Tulsa, Ok
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Wade Metzinger 918-809-0987 71 Cuda 9.28@145 -1s, Pglide 68 Cuda 10.64@124 1.45 60's 318->390 eddys Moparts discount code on WIX - moparts www.Filter1.com
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Re: 426" 651hp on 91 pump gas with 12.75:1 SB street/strip build
[Re: moparmacka]
#2473434
03/28/18 06:21 PM
03/28/18 06:21 PM
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Joined: Feb 2005
Posts: 20,173 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,173
PA.
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The 29 degrees total timing helps too but if the owner gets greedy or a bad load of gas all heck could break loose. If he’s the car show type like lots of guys are and just wants to talk horsepower numbers at the shows it could run forever.
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
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Re: 426" 651hp on 91 pump gas with 12.75:1 SB street/strip build
[Re: WadeMetzinger]
#2473706
03/29/18 07:22 AM
03/29/18 07:22 AM
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Joined: Jan 2003
Posts: 17,918 Akron, Ohio
ProSport
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,918
Akron, Ohio
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Very cool small block, should run good.
1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual
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Re: 426" 651hp on 91 pump gas with 12.75:1 SB street/strip build
[Re: WadeMetzinger]
#2474459
03/30/18 04:57 PM
03/30/18 04:57 PM
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Joined: Aug 2005
Posts: 6,003 Salem
Grizzly
Moparts Proctologist
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Moparts Proctologist
Joined: Aug 2005
Posts: 6,003
Salem
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What do you think you would have made if it was a non-roller cam? Can you provide any flow numbers on the heads? Thanks.
Mo' Farts
Moderated by "tbagger".
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Re: 426" 651hp on 91 pump gas with 12.75:1 SB street/strip build
[Re: WadeMetzinger]
#2474891
03/31/18 02:41 PM
03/31/18 02:41 PM
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Joined: Feb 2004
Posts: 2,073 Tulsa, Ok
WadeMetzinger
OP
top fuel
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OP
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Joined: Feb 2004
Posts: 2,073
Tulsa, Ok
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You would probably loose 20-30hp with a hydrolic roller.
I’ll look for the flow numbers on the heads, they aren’t fully ported, it was like a stage 2 port job
Wade Metzinger 918-809-0987 71 Cuda 9.28@145 -1s, Pglide 68 Cuda 10.64@124 1.45 60's 318->390 eddys Moparts discount code on WIX - moparts www.Filter1.com
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Re: 426" 651hp on 91 pump gas with 12.75:1 SB street/strip build
[Re: WadeMetzinger]
#2474916
03/31/18 03:24 PM
03/31/18 03:24 PM
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Joined: Jan 2003
Posts: 6,591 Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Nice performance numbers, not sure id be comfortable running it on pump gas any higher then your timing is set. But I know you know that as well. Did you do a cranking comp test? My calcs on your DCR is at 9.40 Typically with a 9.4 comp, cranking psi would be around 140/150.
Last edited by Sport440; 04/02/18 12:00 AM.
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Re: 426" 651hp on 91 pump gas with 12.75:1 SB street/strip build
[Re: WadeMetzinger]
#2478821
04/07/18 12:57 PM
04/07/18 12:57 PM
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Joined: May 2007
Posts: 1,675 Mi.
G-Money1320
top fuel
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top fuel
Joined: May 2007
Posts: 1,675
Mi.
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You gotta love those stealth small block killer motors!! Nice work on a nice piece!!
416 stroker from Nick at Compu-flow. 11.14 in full street trim. Seems like a new best every time out. 11.06 open headers----so far!!
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Re: 426" 651hp on 91 pump gas with 12.75:1 SB street/strip build
[Re: WadeMetzinger]
#2497988
05/19/18 08:47 PM
05/19/18 08:47 PM
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Joined: Feb 2007
Posts: 2,578 sweden
1Fast340
master
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master
Joined: Feb 2007
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sweden
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