Another 5.7L Hemi build underway
#1236380
05/20/12 12:26 PM
05/20/12 12:26 PM
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Joined: May 2004
Posts: 304
Maryland
SLEDGEHAMMER
OP
enthusiast
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OP
enthusiast
Joined: May 2004
Posts: 304
Maryland
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Being a small budget racer over the years I have been gathering parts to step up with the Dart. It has been slow coming but the other month I had a major setback with the disappearance of my X-block motor. The X-block motor has been a thorn in my side for years. That motor has a long history and saga behind it. Maybe it was not meant for me to have that motor. So I have mixed feelings due to the $$$ it cost me but it could have cost me more in other ways. Now I am back to square one 10 years later with nothing to show for my efforts and money, I will be brushing off years of dust and oiling the jack stands. Frustrated at starting over I thought about getting out of racing and selling the Dart. I was on the phone with EvilB1Dart the other week and I mentioned I had to start all over again. I told him I was looking at the 1st Gen Hemi motors after seeing some of the old top fuel guys were running iron block and heads. Even saw a twin turbo dragster that made 1000+ hp. He suggested I take a look at the Gen III Hemi combinations. Finding out that the new blocks can take a punch I figured what the heck give it a shot and build a 5.7L Hemi. Last week I spent some time on the phone talking to a few people about the possibilities and limitations of the Gen III blocks in various applications. Depending on what power-adder I decide on going with then I will start working on getting the rotating assembly together. Some of the other tasks of this project: - Update wiring
- EFI system and pump
- Make a few additions to rollcage for safety and stock suspension updates (motor plate, etc.)
1971 Dodge Dart - Powerplant <<TBD>>
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Re: Another 5.7L Hemi build underway
[Re: SLEDGEHAMMER]
#1236382
05/20/12 10:38 PM
05/20/12 10:38 PM
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Joined: Jan 2003
Posts: 16,925
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,925
NC
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I am an old school (and old person) big block guy. But I believe the 3G Hemi is the wave of the future with great potential for us Mopar racers. I even bought a 2009 Challenger R/T 5.7 for a daily driver! 
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Re: Another 5.7L Hemi build underway
[Re: 440Jim]
#1236383
05/20/12 10:46 PM
05/20/12 10:46 PM
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Joined: Mar 2003
Posts: 6,334
Heaven
EvilB1Dart
master
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master
Joined: Mar 2003
Posts: 6,334
Heaven
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Good to see you moving forward on the project Sledge. Take your time, it'll all come together and the results will be rewarding.  Wes
"Any fool can know. The point is to understand"
- A. Einstein
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Re: Another 5.7L Hemi build underway
[Re: 440Jim]
#1236385
05/21/12 01:20 AM
05/21/12 01:20 AM
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Joined: May 2004
Posts: 304
Maryland
SLEDGEHAMMER
OP
enthusiast
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OP
enthusiast
Joined: May 2004
Posts: 304
Maryland
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Thanks Jim, Being a regular guy where the $$$ is hard earned and most times already spent. I was not having much luck finding a way to work a deal to get a set of heads for the BB so I will keep trying to find a way to make it happen.  -Eric-
1971 Dodge Dart - Powerplant <<TBD>>
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Re: Another 5.7L Hemi build underway
[Re: SLEDGEHAMMER]
#1236386
05/21/12 08:35 AM
05/21/12 08:35 AM
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Joined: Aug 2003
Posts: 4,675
On the parachute mount
n20mstr
master
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master
Joined: Aug 2003
Posts: 4,675
On the parachute mount
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i was strongly considering a gen3 hemi not too long ago. THere is crazy potential with STOCK heads and block, BUT there is always that stock block limitation. THe best part about that engine is everyone considers it a Small block so when looking at heads up racing its more attractive than a big block
....BAD A$$ STREET CAR.....
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Re: Another 5.7L Hemi build underway
[Re: MIKES_DUSTER]
#1236390
05/21/12 02:06 PM
05/21/12 02:06 PM
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Joined: Sep 2003
Posts: 10,645
Houston, Tx
AlexP
I Live Here
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I Live Here
Joined: Sep 2003
Posts: 10,645
Houston, Tx
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Quote:
I do have a question for those who have built one or going to build one....Building a Gen III HEMI,is the cost MORE or LESS then building a stroked 360???
Coming from a small block build, it will cost almost the same as any BB or SB build. There is no premium on the parts and the cylinder heads will be a better value. Stroker kits cost the same and the swap hardware isn't expensive.
In an A-body it will take some work to get power steering and air conditioning to work, but it can be done.
For about $2k, plus $500-1000 in cores you will have a 360cfm set of heads. From what I've seen it takes exotic rocker gear and a seriously ported head to match that.
The breaker will be if you want EFI most options run about $1500 and up.
If you've already got a good carb, the ignition controller will be about $600.
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Re: Another 5.7L Hemi build underway
[Re: AlexP]
#1236391
05/21/12 04:03 PM
05/21/12 04:03 PM
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Joined: Sep 2004
Posts: 1,828
houston texas
gremlinsteve
top fuel
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top fuel
Joined: Sep 2004
Posts: 1,828
houston texas
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having just removed my own stroker la motor and starting the build on my 3rd gen based hemi, i can attest that it will cost more.
steve
if You Like Gremlinsteve. Gremlinsteve Likes You.
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Re: Another 5.7L Hemi build underway
[Re: gremlinsteve]
#1236392
05/21/12 04:06 PM
05/21/12 04:06 PM
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Joined: Sep 2004
Posts: 1,828
houston texas
gremlinsteve
top fuel
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top fuel
Joined: Sep 2004
Posts: 1,828
houston texas
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i have 15,750 in mine and its not running yet.....
but i made my mind up doing it this way. it was either a 6.1 based stroker or going with a crate motor 2nd gen hemi....
i still need to get a fuel system in place for this thing...
if You Like Gremlinsteve. Gremlinsteve Likes You.
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Re: Another 5.7L Hemi build underway
[Re: Triple Threat]
#1236394
05/21/12 06:09 PM
05/21/12 06:09 PM
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Joined: Sep 2004
Posts: 1,828
houston texas
gremlinsteve
top fuel
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top fuel
Joined: Sep 2004
Posts: 1,828
houston texas
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8.8 to 1 426 based off a 6.1
6.1 head moving in the 380 cfm range
arp studded block ect..
255/255 at .050 hyd roller
t trim vortech with the pullies for about 18psi
crank kits a k1 piece. rod and crank piston is a wiseco
going in front of a 833
full tti exhaust
fast xfi system with a 92 mm tbody
im sure there is other stuff i have missed in there too that has added to the cost
it should be able to do anywhere up to 1200 rwhp. there have been many other builds like it doing that. but i would be happy with half that i guess...im new to that xfi also...
steve
if You Like Gremlinsteve. Gremlinsteve Likes You.
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Re: Another 5.7L Hemi build underway
[Re: MIKES_DUSTER]
#1236395
05/21/12 07:45 PM
05/21/12 07:45 PM
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Joined: Jan 2003
Posts: 945
La Vernia, Texas
Pat7272
super stock
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super stock
Joined: Jan 2003
Posts: 945
La Vernia, Texas
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Quote:
I do have a question for those who have built one or going to build one....Building a Gen III HEMI,is the cost MORE or LESS then building a stroked 360???
No personal experience yet but I've changed my plans to G3 HEMI vs a SBM based on the hp capacity of the block. For me the prices seem pretty even but I can use a factory 3G block instead of needing an R3 to handle the power I want.
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Re: Another 5.7L Hemi build underway
[Re: Brian Hafliger]
#1236398
05/22/12 10:20 AM
05/22/12 10:20 AM
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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 do have a question for those who have built one or going to build one....Building a Gen III HEMI,is the cost MORE or LESS then building a stroked 360???
Depends on how you compare the two. I'd say that with the benefiet of the hemi's block, both strength and less weight, fairly light heads, ability to make great power, and cool factor there's not to much downfall to the hemi. 5.7 cores are reasonable most times but it will take some time for the 6.1's to come down in price and become plentyfull.
6.4's could take alot of time.
I don't know about this.
The 5.7 are plentiful around here but people are thinking they are made of gold 
With the price of steel there will be alot of 5.7 going to the crusher 
Then you got the exploding rods from hydraulic lock and those blocks are junk.
Now If they would REALEASE THE 6.4 SHORT BLOCK AND BARE BLOCK THAT WOULD BE SOMETHING.
PS same price as the 6.1 bare and shortblock.
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