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Looking for a cheap early 70s I4

PostPosted: Sun Apr 03, 2016 10:28 am
by stickmaster62
Hello engine builders, the Miller Automobile Co. is looking for a cheap, sporty I4 engine between 1973 and 1975. I'm also looking anywhere between 100-120 HP on regular fuel (unleaded preferred, but will settle with leaded as long as it isn't premium). Many thanks in advance!

Re: Looking for a cheap early 70s I4

PostPosted: Sun Apr 03, 2016 10:41 am
by squidhead
check with Cpufreak, he has those :D

Re: Looking for a cheap early 70s I4

PostPosted: Sun Apr 03, 2016 10:42 am
by cpufreak101
i have a 1975 turbo I4 i can optimize a bit, or would ya prefer N/A?

Re: Looking for a cheap early 70s I4

PostPosted: Sun Apr 03, 2016 10:44 am
by stickmaster62
cpufreak101 wrote:i have a 1975 turbo I4 i can optimize a bit, or would ya prefer N/A?


N/A please, I'm trying to build something similar to a Porsche 924.

Re: Looking for a cheap early 70s I4

PostPosted: Sun Apr 03, 2016 11:00 am
by cpufreak101
ok then, any request for displacement?

Re: Looking for a cheap early 70s I4

PostPosted: Sun Apr 03, 2016 11:08 am
by phale
Inline Designs may have something for you!

With catalytic converter or without? Do you have an efficiency requirement?

Re: Looking for a cheap early 70s I4

PostPosted: Sun Apr 03, 2016 11:40 am
by stickmaster62
cpufreak101 wrote:ok then, any request for displacement?


I was thinking anywhere between 2.0L and 2.4L
phale wrote:Inline Designs may have something for you!

With catalytic converter or without? Do you have an efficiency requirement?


No effeciency requirement. As far as catalytic converters go, I might as well say yes since the mid 1970s was when they started becoming required for all cars in the U.S. built at that time.

Re: Looking for a cheap early 70s I4

PostPosted: Sun Apr 03, 2016 11:47 am
by cpufreak101
ok then, i just finished one design, a 2.0L performance motor based off the MKII Communitasia I4, designed in 1974. here are the specs.
Image
the engine could rev up to 6900 RPM with 42 reliability before valve float kills the engine, so i just had the RPM cutoff there as there's no real purpose to rev higher.
let me know if more power is required, because i can stroke it out if needed

Re: Looking for a cheap early 70s I4

PostPosted: Sun Apr 03, 2016 12:01 pm
by stickmaster62
That's not too bad, definitely worthy for an entry level mid 1970s Miller sports car! :D

Re: Looking for a cheap early 70s I4

PostPosted: Sun Apr 03, 2016 12:07 pm
by cpufreak101
yeah, as i said i can stroke it out to get more power, though i'd have to make one from scratch if i want anything better really, i mean i'm amazed i even got that out of a communitasia motor

Re: Looking for a cheap early 70s I4

PostPosted: Sun Apr 03, 2016 12:10 pm
by stickmaster62
No need, the power will be adequate.

Re: Looking for a cheap early 70s I4

PostPosted: Sun Apr 03, 2016 12:11 pm
by cpufreak101
ok, i'll send the files

Re: Looking for a cheap early 70s I4

PostPosted: Sun Apr 03, 2016 12:19 pm
by stickmaster62
Okey Dokey! Thanks for the engine! :D

Re: Looking for a cheap early 70s I4

PostPosted: Sun Apr 03, 2016 12:20 pm
by phale
Inline Designs would like to offer two engines, both based on a 2.0L SOHC-4 family.

The first is DCOE-based and produces 119HP:
Image

The second uses advanced mechanical fuel injection and is more efficient and reliable, but also more expensive:
Image

Re: Looking for a cheap early 70s I4

PostPosted: Sun Apr 03, 2016 12:26 pm
by stickmaster62
phale wrote:Inline Designs would like to offer our custom built DCOE-based inline 4 producing 119HP:


Alright I'm getting more choices than I thought! lol

Anyways, definitely worthy of trying out. Send it over.