What it cost me to build the first ever running 392 G3
#1392478
02/23/13 05:03 PM
02/23/13 05:03 PM
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Joined: Nov 2008
Posts: 833 MN
hemidup
OP
super stock
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OP
super stock
Joined: Nov 2008
Posts: 833
MN
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I see many asking about the G3's lately and how much it cost's to build one. Back in 05 there were only a handfull of engine builders playing around with them with no aftermarket parts available whatsoever. It was kinda like the race to space to get one up and running and I won. Maybe thats how I got nick named the Grandaddy of G3 Hemi's lol. The only thing we could do was to add stroke by offset grinding the crank shaft to a 3.80" stroke. If you worked with the 5.7 you would get 370 cubes and 392 from the 6.1. My journey started with my 2005 4x4 Dodge Ram Rumble Bee pickup truck. She weighed in at 5275 and ran 16 flat off the showroom floor. I wanted to go faster (of course) so I added a blower and the truck went 13.80's which was good enough to put some stock Ford Lightng's on the trailer. Then I wanted to faster (of course) and decided to add more cubes to my 5.7, some head work and a factory 6.1 billet roller camshaft. I planned on stroking my 5.7 to a 6.1...Then Chuck Lofgren stepped into the picture and told me he had a spare factory 6.1 short block and camshaft he was willing to part with and I was jiffy on the spot and picked it up the next day. BTW, thanks again Chuck for the great deal. Here's the break down of parts, most of which were one off at the time. 6.1 short block and roller billet camshaft...$2000...forged 6.1 crankshafts are $400 from the dealer, factory billet roller camshaft $85, aftermarket camshaft over $400. 6.1 blocks from INDY $1400 ?? Offset grinding and surface harden the crank... $200 Custom Ferrea valves...$800 Sent me valves with .308" valve stem dia which then I had to get custom bronze valve guides. Custom ARP bolts and stud's...$660 But since I helped them out with their first set of proto type G3 stud's and bolts they were kind enough to ship me 2 sets for the same price. Thank you ARP. Custom ATI damper...$600 + and even though we helped their engineer's with the G3 prototype...didn't get a break in price. Hand ported 5.7 heads which I took off my original 5.7 motor...N/C, but had Glen Knowlton message them a bit and picked up a few more cfm...N/C and thank you Glenn Knowlton, may you RIP. Eagle Honda rod journal rods...$400 Custom Ross piston's, pins and rings...$1200. Another disaster. I ordered a full skirt piston design, but the skirt hit the crank throw's. Order another set of longer connecting rod's figuring the skirt would clear the throw's, but I was wrong. The longer rod pushed the piston waaay out of the hole so I had to mill the top's of the pistons off which increased the compression I wanted and still had piston skirt to crank throw issues. I then had to remove material off the crank throw's and rebalance the rotating assemble. Custom Cometic head gaskets...$200 Manley Nextek valve springs and titanium retainers...N/C thank you Manley for the valve springs and retainers in exchange for me helping you out with your G3 Hemi piston development. Othewise the Manley valve spring's go for $200 + 6.1 HV oil pump $?? can't remember the price, but I still use the 6.1 factory oil squirter's. If it wasn't for the oil squirter's I'd use a 5.7 oil pump. Sorry for the long post and I'm sure I forgot a few things, but I'll be more than glad to answer any and all question's concerning a G3 Hemi build.
Jerry Williams.
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Re: What it cost me to build the first ever running 392 G3
[Re: 340RICK]
#1392480
02/23/13 06:22 PM
02/23/13 06:22 PM
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Joined: Dec 2009
Posts: 20,640 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
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Thank you gentleman for sharing, that is real world information that we all can use. Again thank you and if you could post some HP or at least trap speeds and weight that would also be much appreciated.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: What it cost me to build the first ever running 392 G3
[Re: hemidup]
#1392483
02/23/13 09:04 PM
02/23/13 09:04 PM
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Joined: Dec 2009
Posts: 20,640 in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
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Quote:
Quote:
Thank you gentleman for sharing, that is real world information that we all can use. Again thank you and if you could post some HP or at least trap speeds and weight that would also be much appreciated.
My current race weight was 5184 lbs before I gained 15 lbs (lol) and added Caltrac's, so I'm over the 5200 lb mark. My truck has a best of 1.48 60', 6.87 @ 98 and 11.03 @ 118. Yeah, the numbers are all screwed up, but it is what it is running the stock PCM and using an adjustable fuel pressure regulator for tuning a/f's.
How much boost are you running and I assume that's a centrifugal SC?
Still for 5200 pounds that's impressive.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: What it cost me to build the first ever running 392 G3
[Re: gregsdart]
#1392488
02/24/13 11:17 AM
02/24/13 11:17 AM
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Joined: Jan 2003
Posts: 10,011 Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,011
Frostbitefalls MN (Rocky&Bullw...
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Jerry, does the new 6.1 block come ready to assemble, or did you have to bore/machine it at all? It may be cost effective to just buy a new 6.1 Vs prepping an original 5.7?
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: What it cost me to build the first ever running 392 G3
[Re: gregsdart]
#1392492
02/24/13 04:07 PM
02/24/13 04:07 PM
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Joined: Jun 2005
Posts: 2,776 Ontario Canada
MattW
master
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master
Joined: Jun 2005
Posts: 2,776
Ontario Canada
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Quote:
Quote:
I am not Jerry, but 6.1 block I bought came fully machined from dodge dealer.
Thanks Rick. Is the 6.1 a direct replacement for a 5.7 with different pistons, or what else changes? I have an early 5.7 now, but have a good stroker crank and rods.
Same stroke 3.58. 6.1 is forged. Bores are different 3.92 for the 5.7 and 4.55 iirc for the 6.1. The 6.1 has floating piston pin.
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