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Old 01-26-2010, 02:44 PM
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4-banger chev II

I have a couple mid 60's 153 c.i. 4's i think these would make a decent engine for a 1900# street rod. I know these were widley used by merc &omc marine. I've heard there are 8-port heads,aftermarket intakes anp pssibly other performance equipment available as these engines also found their way into midget /sprint cars ?? anyone have any knowledge about this engine?

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Old 01-26-2010, 02:49 PM
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Don't know to much but there should be tons of info available as they were very popular in midgets.
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Old 01-26-2010, 03:03 PM
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Should be!,but sofar I haven't been able to turn up much. Anyone have any idea where to search?
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Old 01-26-2010, 04:12 PM
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search Iron Duke and you will get some info



Quote:
Originally Posted by 2old2fast
Should be!,but sofar I haven't been able to turn up much. Anyone have any idea where to search?
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Old 01-26-2010, 05:59 PM
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Quote:
Originally Posted by 2old2fast
I have a couple mid 60's 153 c.i. 4's i think these would make a decent engine for a 1900# street rod. I know these were widley used by merc &omc marine. I've heard there are 8-port heads,aftermarket intakes anp pssibly other performance equipment available as these engines also found their way into midget /sprint cars ?? anyone have any knowledge about this engine?
There was a post recently on the HAMB on these, quite a bit of info came up. As I recall the Mercruiser heads were the hot setup for a rod engine. Do a thorough search for before you post though, it's a tough crowd.
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Old 01-26-2010, 06:45 PM
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thanks, hippie I'll give hamb a try. anyone else?
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Old 01-26-2010, 07:19 PM
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The problem w/a lot of the midget car stuff, is that it was for alky and FI.
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Old 01-27-2010, 07:04 AM
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Ayuh,... I hang out at iboats, a Very popular boatin' forum...
I also see Way too much Confusion over these motors,...
Especially with the moniker "Iron Duke", which is bandied about,+ relates to a Couple of motors...(All depending on the crowd at hand)
The 153"s,+ the 181"s used in boats, is a descendant of the old Chevy I-6...
It uses a head with the manifolds,+ carb on 1 side of the motor...

The Racers guys I've met, who've looked at the 2.5/ 3.0l motors, tell me those are Not the motors they run,+ call the Iron Duke...
The motors they run are the GM Corporate 151" Pontiac motors... Still 2.5l, but Totally different motors...
Those motors share Nothing in common with the motors used in Boats...
They're cross-flow heads, the distributer is positioned differently,+ they're just plain Different...
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Old 01-27-2010, 11:10 AM
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boss duke

A neighbor built and raced migets -circle cars. One of the 4 cyl cars had what he called the boss duke. A ford Boss 302 head on a gm block. I don't know what was involved in the conversion.
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Old 01-27-2010, 01:05 PM
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the boat guys are all about the low end TQ curve...

the sprint guys are all about the very high rpms HP...

it's hard to get both for all around "great" street performance on a 4 banger without a turbo....
(read up on the 84 Mustang turbo package)

the old english sports cars (Triumph MG et) were a blast to drive with only 100HP stock 4 bangers,,,what made them fun was the tranny 4 speed ratios used and relatively deep rear gears....

build a mild 181 and let the gearing do the rest and it will scoot!!!

edit: the most fun was the original Mini Cooper S,,,CRS=about 1400cc? 70HP? and it pushed you back in the seat even at 2,000lbs? (due to the gearing)
top speed was only about 80 but you got there darn quick!!!
we used to call them a go cart on steroids...

Last edited by red65mustang; 01-27-2010 at 01:10 PM.
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Old 01-28-2010, 04:56 AM
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Quote:
Originally Posted by bondo
I also see Way too much Confusion over these motors,...
Especially with the moniker "Iron Duke
I personally never heard the term "Iron Duke" until the 2nd. generation of GM 4 cyl. engines came to be- like the Pontiac version, in particular.
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Old 01-28-2010, 05:17 AM
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Quote:
Originally Posted by timothale
A neighbor built and raced migets -circle cars. One of the 4 cyl cars had what he called the boss duke. A ford Boss 302 head on a gm block. I don't know what was involved in the conversion.
Midget racers were traditionally some of the most innovative builders this side of Bonneville.

I won't try to list all the permutations of engines/heads/one offs that were used throughout the years, but suffice to say they were 'different'. My favorite was the Chrysler hemi head on a Chevy(?) bottom end.

Until recently, that was considered the norm, but w/the advent of factory one-offs, I suppose the move will be towards them as opposed to true one-offs. The end of an era, so to speak.
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Old 01-28-2010, 10:29 AM
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Quote:
the most fun was the original Mini Cooper S,,,CRS=about 1400cc? 70HP? and it pushed you back in the seat even at 2,000lbs? (due to the gearing)
top speed was only about 80 but you got there darn quick!!!
we used to call them a go cart on steroids...
Ayuh,... In a younger day, in a different world I had several Minis,...
A couple of 850s, at 36hp I think, a 998, at about 50hp,+ a 67 Mini Cooper S...
I got it without it's 1275 Cooper motor/ 5-sp,...
I transplanted an Austin America 1275, 4-sp into it...

That's probably the 1 car I'd Love to still have the Most, of many modes of transportation since...

Quote:
Quote:
Originally Posted by bondo
I also see Way too much Confusion over these motors,...
Especially with the moniker "Iron Duke

I personally never heard the term "Iron Duke" until the 2nd. generation of GM 4 cyl. engines came to be- like the Pontiac version, in particular.
Ayuh,... That's my point... It seems to Me, that the "Iron Duke" is the 2.5l Pontiac,...
Not the Chevy 2.5l/ 3.0l...
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Old 01-28-2010, 10:56 AM
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Quote:
Originally Posted by bondo
Ayuh,... In a younger day, in a different world I had several Minis,...
A couple of 850s, at 36hp I think, a 998, at about 50hp,+ a 67 Mini Cooper S...
I got it without it's 1275 Cooper motor/ 5-sp,...
I transplanted an Austin America 1275, 4-sp into it...

That's probably the 1 car I'd Love to still have the Most, of many modes of transportation since...



Ayuh,... That's my point... It seems to Me, that the "Iron Duke" is the 2.5l Pontiac,...
Not the Chevy 2.5l/ 3.0l...
That's cool. At least I ain't alone!

I worked up in NY w/a guy that drove a Mini- the REAL Mini, not whatever the new ones are. Mildly hotted up, engine-wise.

He could slalom that thing in a parking lot hard enough to actually make you dizzy when you climbed up out of it!
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Old 01-29-2010, 10:29 AM
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one of the most fun restorations we have done is called the Hillman "IMP"

came equipped with a rear mounted Coventry Climax Lotus F1 motor!!!!

so light that two people can lift the front to change a tire!!

(I honestly had never heard of it till it got to the shop)

has a heck of a racing and rally record pedigree...

LOL,,,everybody called it "the clown car" at the shop,,,it does look just like the circus clown cars...

brief history:
http://www.hillman.org.au/imps_page_11.htm

and pic' attached
(it was a concuors resto so it had to be that hideous grey)

just another example of what a 4 banger car can be...
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