Re: hemi
[Re: coletrickle]
#2412876
12/03/17 11:57 PM
12/03/17 11:57 PM
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Joined: Aug 2003
Posts: 43,251 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,251
Bend,OR USA
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Do you know if the block is Compact Graphite iron or cast grey iron? I'm assuming aluminum heads, correct?
Last edited by Cab_Burge; 12/03/17 11:57 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: hemi
[Re: cesar perez]
#2412894
12/04/17 12:59 AM
12/04/17 12:59 AM
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Joined: Jan 2003
Posts: 6,147 Melbourne , Australia
LA360
master
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master
Joined: Jan 2003
Posts: 6,147
Melbourne , Australia
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Current engines have either a mirrored head, or a symmetrical head.
There are Hemi '99 and '06 heads, I believe they look fairly similar.
I recall Al or someone mentioning that there was a version that ran 4 bolts or there abouts, per rocker arm. These were the one's to get, earlier versions would pull the threads out.
There is a bit of this stuff now these days, most guys aren't brave ($$$) enough to step up to it.
Alan Jones
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Re: hemi
[Re: cesar perez]
#2412977
12/04/17 10:25 AM
12/04/17 10:25 AM
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Joined: Oct 2004
Posts: 3,097 back in Georgia
dthemi
master
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master
Joined: Oct 2004
Posts: 3,097
back in Georgia
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Both those heads more remind me of a boss 9 Ford in the chamber than a chevy.
I'd be more inclined to do anything other than try to make that platform work in anything other than ps.
I've seen fast ones that are larger inch for sure, but every single aspect of those motors was optimized for 500 inch na racing. The money, and effort to keep one on boil is demanding. They need cam, and rpm to work, and it's narrow rpm window. There isn't much torque either.
Having budget to run one, I'm sure it's a blast to zing something to 10 grand every shift, and pass, but you'd go faster, for longer, for less, with something less exotic imo.
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Re: hemi
[Re: cesar perez]
#2413030
12/04/17 01:05 PM
12/04/17 01:05 PM
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Joined: Jan 2003
Posts: 19,377 Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,377
Las Vegas
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They are HEAVY HEAVY engines....Ours weighed 885lbs ready to drop in the car, top to bottom end to end.
There are Asymmetrical and Symmetrical port versions of the head. All the Symmetrical port stuff will have multiple rocker stand hardware. The Asymmetrical port stuff is way more common and is where you will find a "good" and not so good layout. The difference is rocker stand hold down the not so good stuff uses a single bolt to retain the rocker stands. The "good" head uses multiple hold down bolts for the rocker stands. I know people who use both successfully.
The blocks have EXTREMELY short decks. Since that is whats preferred in Pro Stock where they were designed to work. The NMRA stuff is 4.9" bore space so they can go to 4.700"+-, makes power. The blocks cannot hold a lot of stroke and from what I understand 560"+- is about all you can get without a custom block. There are also Goodwin versions of the 99/06 Hemi that are built around a 5" bore space. Seems he builds them to 655" for the most part.
As for maintenance, yeah its definitely more than your average bracket engine. The stuff was designed to work at high RPM. You will end up replacing springs on a regular basis and also the seats will likely need to be touched up fairly frequently. And that was running one at WAY less RPM than Pro Stock does.
The blocks also come is a few versions. The preferred one being the 9 cam bearing version over the 5 bearing ones. They also have skirted and unskirted varieties. Unskirted ones are all 9 bearing. The block are made from Compacted Graphite
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: hemi
[Re: cesar perez]
#2413123
12/04/17 04:04 PM
12/04/17 04:04 PM
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Joined: Jan 2003
Posts: 19,377 Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,377
Las Vegas
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They are basically carbon copies on a 5" bore space.Yes he has one as does another member here with one in a 68 Barracuda. I have seen the dyno numbers from Goodwin, hard to quantify in a pulling truck to me what those numbers mean. As for the car Ill let the owner speak to that.
A Goodwin 99 also I believe won the NA class at drag week in a Camaro. Don't know the details but it was in the 7's and had an 8.0x average from what I recall...
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: hemi
[Re: cesar perez]
#2413557
12/05/17 01:41 PM
12/05/17 01:41 PM
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Joined: Apr 2005
Posts: 1,106 Quebec, Canada
Diablo
super stock
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super stock
Joined: Apr 2005
Posts: 1,106
Quebec, Canada
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We have had both one of Goodwin's 5" Cast Hemi 99 motors and now his Billet 5" Hemi engine.
Maintenance on any of them isn't for the faint of heart but if you stay up on it then they are pretty happy motors. Full refresh comes at 45-50 Truck pulling runs.... about every two seasons for us. Valve springs are ever 12-14 runs (truck pulling runs).
And for RPM's even at 650ci our Cast 99 Hemi peaked at 8000 and we ran it around 8600rpm, and the new Billet one peaks at 8400 and we run her right around 9000. So even with the big cubes they still want to turn!
Last edited by Diablo; 12/05/17 02:51 PM.
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