What is the 411 on the later versions of a Chevy II 153 cubic inch straight four?
I have attempted to trace it forward a couple of times and ended up in a quagmire.
Hoping to find a nice line of progression for them like the GM 60 degree V6.
Where you can pick your level of high tech development.
Right now cast iron block and head carburated will do for a start.
Later than Chevy II though please.
Thanks.
Iron Duke. Half a 302. Used in S trucks and fwd sedans into the 90s somewhere. Coarse, noisy, tons of aftermarket from the 80s when they were put I'm IMSA Fieros. Could buy blocks and heads from GM performance parts to build to 3.3 liter. I presume all that stuff has long since been turned to scrap.
I alao presume a well built one would keep up with a 90's Neon...said only partly tongue in cheek.
Even in midget racing where pushrod engines get a displacement break they are obsolete and gone.
They were pretty horrid and staunchly resisted efforts to extract much additional power without catastrophic consequences with the bottom ends. IIRC they came from 153 ci to 150 ci via a shorter stroke Brazilian model in the 1970s
You'd be better to look to a bit more modern engines - the Ecotec in various displacements was a good option.
Thank you for all the responses
Let me just say a straight four is very handy for building a race car chassis.
Straight 4 we actually gave up on and found something else in the meantime.
I will spare you all what it is.
i am jumping out of my skin with excitement about it though.
That is based on MY life experience with cars.
Have learned to be excruciatingly particular about what you commit too.
As far as getting something to look REAL COOL at a car get together.
I have let go of THAT idea a LONG time ago.
GM Four cylinder page on Wikipedia is helpful tracking down engine that is just your speed.
The iron duke is a different engine than that early Chevy II four cylinder engine, which evolved into an engine that Mercruiser used for marine applications. There are several long discussions about it over on the Jalopy Journal board:
https://www.jalopyjournal.com/forum/threads/4-cylinder-mercruiser-engined-cars.994010/
https://www.jalopyjournal.com/forum/threads/chevy-ll-4-banger.144835/
https://www.jalopyjournal.com/forum/threads/chevy-ii-153-four-cylinder.745583/
Streetwiseguy said:Iron Duke. Half a 302. Used in S trucks and fwd sedans into the 90s somewhere. Coarse, noisy, tons of aftermarket from the 80s when they were put I'm IMSA Fieros. Could buy blocks and heads from GM performance parts to build to 3.3 liter. I presume all that stuff has long since been turned to scrap.
I alao presume a well built one would keep up with a 90's Neon...said only partly tongue in cheek.
I always thought they were related too until recently.
I've had very good luck with Iron Dukes in the past and seen some built for mini mod/stock that made way more power than I thought possible. They easily ran with built 2.3 Fords. In the 90's I actively looked for a 64-67 Chevy ll so I could drop a Iron Duke/5 spd from a wrecked S10 and use it as my commuter. Never found one for the right price
Don't forget the cool Pontiac Trophy 4/Indy 4/Indianapolis 4, which was cool little 194.5 cubic inch slant-4, made by slicing a Pontiac 389 lengthwise down the middle. Kind of rare though, as they only made them from 1961-1963. But I know that guys were running them at some of the Bonneville classes by bolting on a single crazy aftermarket Pontiac V8 head, plus aftermarket pistons and rods for a V8 and then boost and methanol. Mickey Thompson also built some 4-71 blown variants for dragsters, and even took one and cut it in half again for a 97.25 inline-twin.
' Mickey Thompson also built some 4-71 blown variants for dragsters, and even took one and cut it in half again for a 97.25 inline-twin.'
Mickey Thompson had a very good situation with GM.
He would think of hot rod ideas and GM would say 'Go ahead and build it.'.
Don't think there was anything like that before or since then.
The Californian said:
' Mickey Thompson also built some 4-71 blown variants for dragsters, and even took one and cut it in half again for a 97.25 inline-twin.'
Mickey Thompson had a very good situation with GM.
He would think of hot rod ideas and GM would say 'Go ahead and build it.'.
Don't think there was anything like that before or since then.
He also knew how to take care of his sponsors. The official given reason that Challenger I didn't back up its run was that it broke a driveshaft. In actuality, Challenger 1 didn't have any driveshafts, it was that he had split one of the Pontiac engines right down the middle. But that would make it look like Pontiac built junk engines, so he told a different story to the press to not make GM look bad.
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