1966 IK engine code - real or imaginary

[Edward M.]

OK, so another off the wall question...Did the 1966 engine code "IK" really exist in the wild, or has it only been seen in captivity?That is my cute way of asking if the 1966 427 / 425 hp IK engine code was actually stamped by the engine assembly plant. Or is "IP" code all there ever was for this engine.Some say IP is 427 / 450hp (early 66), and IK is 427 / 425hp (later cars). Others say no change between IP and IK, so what was the need for IK.I say, don't have a clue, that is why I am asking.What say you?

[Duke W.]

Re: 1966 IK engine code - real or imaginary

The NCRS Spec Guide says IK is for L-72 with M-22. Only 15 M-22s were produced, and they were only available with L-72, which would make IK rarer than the '67 L-88 engine code, IT.

My question: Why a different engine code for L-72 with M-22? Was there a different bellhousing, flywheel, clutch assembly than with M-21?

Duke

[Edward M.]

Re: 1966 IK engine code - real or imaginary

I am not so much focusing on what the code means; simply wondering if this animal actually exists. So far, I ahve read the following "possible" applications for the IK engine code:

1. IK means 427 425hp AND M22.
2. IK means 427 / 425 hp (late 66) Early 66 engines were IP.
3. IK means 427 /425 hp. 427 / 450 hp engines were IP.
4. IK never existed. All 66 427 425hp engines were IP.
5. IK means 427 / 425 hp engine with aluminum heads.

I am really just interested in whether or not we can / have documented an actual 1966 427 engine with an IK code?

[Brian G.]

Re: 1966 IK engine code - real or imaginary

Check out post #17..............

http://www.corvetteforum.com/forums/c1-and-c2-corvettes/3502323-another-fact-or-fiction-topic-1966-427-450-a.html

[Steve G.]

Re: 1966 IK engine code - real or imaginary

[QUOTE=

My question: Why a different engine code for L-72 with M-22? Was there a different bellhousing, flywheel, clutch assembly than with M-21?

Duke[/QUOTE]
That would be interesting to know. I believe I know one of the 15 cars. It currently resides in Winnipeg, but was sold new in either Sioux City IA or Sioux Falls SD. The engine in it is a CE block, but I've known this car since the early 70's and know of guys that follow it back further, and am sure the car is legit. I don't know how much paperwork is with the car, but I do know he has the POP. It was unmolested when we first saw it and has had the m22 as long as I've known. It has the factory 4:10 axle. I had no idea the option was that rare and not being my car I never looked into it any further. Next time I see him I'm going to look into it a bit further.
Steve

[Larry E.]

Re: 1966 IK engine code - real or imaginary

OK, so another off the wall question...Did the 1966 engine code "IK" really exist in the wild, or has it only been seen in captivity?That is my cute way of asking if the 1966 427 / 425 hp IK engine code was actually stamped by the engine assembly plant. Or is "IP" code all there ever was for this engine.Some say IP is 427 / 450hp (early 66), and IK is 427 / 425hp (later cars). Others say no change between IP and IK, so what was the need for IK.I say, don't have a clue, that is why I am asking.What say you?

FWIW: After taking several seminairs with Al Grenning on this subject;here is my 2 Cents worth:

According to Towanda Engine records only two L72 where made for the M22 (which took the "403" Bellhousing) there for the IK. The 15 engines that we all hear about where under "experimental" engines made at towanda. AFAIK they where stamped IP. The engines where something other than the stock L72. Maybe the mystery will be solved someday. Also IIRC Al said just because the 2 L72/M22 where made does not mean they where installed at St.Louis. Larry

[Edward M.]

Re: 1966 IK engine code - real or imaginary

Yes, apparently the IK engine did use a different bellhousing, flywheel and clutch assembly. The thread on CF explains the details.

[Edward M.]

Re: 1966 IK engine code - real or imaginary

I would also be interested in the information on a protect-o-plate if it showed an engine stamp of IK.