Gonna build an engine
#2261999
03/02/17 02:05 AM
03/02/17 02:05 AM
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Joined: Mar 2017
Posts: 2 Santo domingo, dominican repub...
John2869
OP
member
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OP
member
Joined: Mar 2017
Posts: 2
Santo domingo, dominican repub...
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Hi guys, as the subject says I'm planning on building an engine. My car's a 74 challenger, used to be my daily driver, kept it running myself mostly but things got a little tough over here (i live in Dominican Republic, ordering parts got real expensive) so i had to get a modern car.
Now things are looking up, sent the car to get some rust removed, fresh coat of paint and brand new interior and since it's not my everyday car anymore im gonna do an engine swap. Been reading a lot, i know my way around a car but it's my first time building an engine, found a lot of info and i have a pretty good idea of all the upgrades i'll have to make...only thing i dont know is if a gen 2 HEMI will fit.
Any imput would be greatly appreciated, i'll be posting the project in the project section tomorrow with pics.
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Re: Gonna build an engine
[Re: 71birdJ68]
#2262016
03/02/17 02:22 AM
03/02/17 02:22 AM
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Joined: May 2003
Posts: 96,666 On The Boat, On The Lake, Wa. ...
amxautox
Still Retired. Still Posting on Moparts. A Lot.
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Still Retired. Still Posting on Moparts. A Lot.
Joined: May 2003
Posts: 96,666
On The Boat, On The Lake, Wa. ...
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Yup, those early years came with a Hemi. Depends what engine came in that car as to what is needed to swap in a Hemi - big block, small block, or slant six.
Tom
"Everyone should believe in something; I believe I'll go fishing."
-Henry David Thoreau
Men and fish are alike. They both get into trouble when they open their mouths
author unknown
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Re: Gonna build an engine
[Re: John2869]
#2262093
03/02/17 10:48 AM
03/02/17 10:48 AM
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Joined: Oct 2003
Posts: 21,345 Marysville, O-H-I-O
70Cuda383
Too Many Posts
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Too Many Posts
Joined: Oct 2003
Posts: 21,345
Marysville, O-H-I-O
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Do a lot more research before ordering. If your car is a 318, you can't just drop in a 426. You will need to swap the front suspension, k member, transmission, etc. if parts are hard to get for you, then I would stick to the same engine family. If it's a 318, build a 360 stroked to 408. It will be a direct swap. Were there even any big block e-bodies in 74? If yours is a big block, then you have a lot of the parts needed for a hemi but be ready for sticker shock. A 400 can make a really stout stroker too for 1/4 the price
**Photobucket sucks**
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Re: Gonna build an engine
[Re: John2869]
#2262184
03/02/17 02:16 PM
03/02/17 02:16 PM
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Joined: Feb 2003
Posts: 21,318 Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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If ordering regular parts gets expensive, you'll fall over when you see hemi prices! Seriously, best of luck, your Hemi Challenger will be awesome! Some things to consider, if your car is a factory V8 car, you'll probably need the conversion motor mounts from engine-swaps.com if yours is a slant 6 car, I think you need a V8 k-frame to even get started. Also, if your car is a factory slant 6 or small block car you will need a different transmission and a new rear differential will be on your to-do list as well.
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Re: Gonna build an engine
[Re: 318 Stroker]
#2262203
03/02/17 03:09 PM
03/02/17 03:09 PM
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Joined: Feb 2005
Posts: 28,312 Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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OP's 74 Challenger came with one of two engines. 318 or 360. Slants and big blocks weren't offered. This is correct.
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Re: Gonna build an engine
[Re: John2869]
#2262599
03/03/17 12:38 PM
03/03/17 12:38 PM
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Joined: Jan 2003
Posts: 5,139 East Aurora (Buffalo) NY
RoadRunner
master
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master
Joined: Jan 2003
Posts: 5,139
East Aurora (Buffalo) NY
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Building a Hemi can be one of the most frustrating and rewarding tasks you can do in the Mopar world. I've built one. Will never do another. There are many people here on the board that can help. Some hang out over in the race forum more, so post engine questions there.
Some things to consider: Cost. A hemi will be on the upper end of the spectrum. Once the part description has Hemi in it, the costs is 2-3x. You can use original parts, which you will be competing with restoration guys for which drive costs up, or use aftermarket, which don't always fit and may need some attention to work right. So you may get a bit lower cost, but added frustration. In either case, some parts are pretty scarce and will put a substantial dent in your bank account. Second: overall drive train. If your car had an 8 cylinder, there are conversion mounts that allow Hemi to bolt in. TTi headers will clear everything. They cost, but fit. Clutch/trans will be an issue if you are building big power (and why not if you are already building a Hemi). You will need a McLeod street twin and preferably a Hemi 4spd (18 spline). A 23 spline may hold up, they are pretty robust to around 450 to 500 ft-lbf torque from what I have read. Maybe that is optimistic though. Rear end will be an issue too if you don't have at least a decently built 8-3/4. A more stock build Hemi would probably work fine in front of a 23 spline trans and 8-3/4" rear with street tires. The tires will be the "fuse" in the system that will break away first.
If you can handle that, then I say go for it. Otherwise, a decent wedge with a stroker can build almost as much power for less cost. You will still have drive line concerns though, as a decent 440 with a 499 stroker kit and aftermarket heads can get 600 hp. You will still need a v-8 k-frame too.
Good luck.
68 Road Runner (383/4speed, post car w/decor pkg) - Major Project 69 Road Runner w/472 Hemi & 4 speed. 70 Challenger R/T SE EF8 w/ V9J, U - A32 - Major Project 2023 Ford Mach 1
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Re: Gonna build an engine
[Re: John2869]
#2263082
03/04/17 03:00 AM
03/04/17 03:00 AM
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Joined: Jun 2005
Posts: 6,257 gulfport, ms, west mi
rowin4
master
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master
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
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As stated above ,Hemi =$$$$$$ lots of them. I'm putting one togeather ,been about 4 years of buying expensive parts. After spending about $10,000 and being nowhere close I thought WHAT THE HELL WAS I THINKING>
it's ok to butt heads, just don't do it with a butthead
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Re: Gonna build an engine
[Re: John2869]
#2263095
03/04/17 03:44 AM
03/04/17 03:44 AM
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Joined: Aug 2003
Posts: 43,285 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,285
Bend,OR USA
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I'm building a 426 Street Hemiroid motor for a local customer for his 1970 Challenger, the motor is being built with mostly new parts, new World 4.490 rough bore block, used older KB top fuel 4.500 stroke crank, a set of lightly used Manley steel I beam SS rods, new custom made Diamond pistons, new Stage V heads, used Stage V cast aluminum valve covers that will be polished, all new Stage V rocker gear, new custom made Manton pushrods, new polished 2x4 inline Stage V intake manifold set up for EFI with dual 4150 dry throttle bodies, solid roller cam and lifters, seven quart Milidon road racing oil pan and probably a Milidon external oiling system. Any hemi motor, Gen 1, Gen 2 or the new Gen 3 will not be cheap or easy to build to get good results, hence my Hemiriod name for them pain in the rear motors I've been racing and building the Gen 1 Chrysler Firepower Hemi and Gen 2 Mopar 426 street hemi motors for a long time,(started in 1965 on my first 1955 Chrysler 331 motor) no experience yet on the new Gen 3 motors, yet EDITED : Buying any parts for the 426 hemi will be expensive and their are currently no new cast iron blocks being made so plan on buying a new aluminum block or wait for a new cast iron block to be made or look on the internet trying to buy all the used or new parts needed to build your motor Hemi motors are impressive and they can be made to make a lot of power, but not cheaply or easily Think long and hard before choosing, just like marriage Good luck regardless on what you choose to build
Last edited by Cab_Burge; 03/05/17 04:39 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Gonna build an engine
[Re: rowin4]
#2263543
03/05/17 03:04 AM
03/05/17 03:04 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Yes, consider other engines (highly recommended).
live every 24 hour block of time like it's your last day on earth
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Re: Gonna build an engine
[Re: Mopar_Rich]
#2273596
03/21/17 12:06 PM
03/21/17 12:06 PM
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Joined: Feb 2010
Posts: 153 MI, USA
moparmitch
member
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member
Joined: Feb 2010
Posts: 153
MI, USA
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Cab Let me know when you're ready for the EFI. If you have my book, you saw one of my early dual throttle body EFI 572 HEMIs. Lots of changes since then.
Rich I have your book - good stuff! So, is there an updated or new book in the works? Maybe a book on some basic/fundamental EFI tuning? Thanks!
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Re: Gonna build an engine
[Re: Mopar_Rich]
#2273637
03/21/17 01:18 PM
03/21/17 01:18 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Or maybe I'll just go fishing! Ding ding ding I (do) believe we have a winna.
live every 24 hour block of time like it's your last day on earth
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