Easy Mike

No. The LS6 was not available in the 73s. The available LS4 was rated at 275hp. It appears a previous owner did some work on the engine.

Brcmpbl

Fact.

MidShark

[QUOTE=yankee Actually with the factory side pipes on it pulled like a bat outta hell in first gear an.[/QUOTE]

No "factory" sidepipes in '73. I think you're are giving the LS4 a bad rap. My brother-in-law restored a '73 convertible a few years ago, and when the engine was rebuilt, the only deviation from stock was a higher performance cam (I don't remember the specs). I went with him to the dragstrip and he ran a 13.18 at 106 mph. That is better than the LS6 Chevelles ran out of the box.

yankee phil

Yea ,probably, but **** happens with performance cars, I remember a dealership,Norward chevrolet, getting L88's in back in 68-69 with a factory option sticker listing a corvette with the option L-88 as having 650 horsepower and a chevelle with the same L-88 factory option listing the horsepower as 550 horsepower. I was there when they were unloading the car carrier from chevrolet so it came directly out of the factory so,2 different horsepower L-88's according to the window stickers, anybody know how that came about,was just happy at the time to be there when they were started up and unloaded .By the way the corvette idled like a funny car and the chevelle only slightly less radical. Were there cam options you could ask for from the factory,perhaps if you were a professional racer?

Mike Ward

And you're all replying to another old thread that been brought back from the dead..........

MidShark

It' a slow day. IBTL

Alan 71

Hi yp,
Are you saying the Chevrolet built Chevelles with L-88 engines? Even one?
Regards,
Alan

yankee phil

Thats what I saw at the dealership on the factory window sticker. I was just a snotnose kid at the time so I didn't ask any questions about the different horsepower options , I just assumed it was all correct. I don't know for instance if the dealer installed the engines himself or even if he might have installed more racing parts on an already high performance L88 package. But to answer your question as far as I saw by the window factory sticker on the chevelle it had an L88 option in it ,yes.
By the way they were 1968 models.

yankee phil

What did an LS4 tachometer redline on,I think it was a real low RPM but I don't know. anyone out there know? Your probably right though but this has been a mystery for me for 30 years. Were the tachometers distributor(mechanically) driven in 73?

yankee phil

hey ,this motor was probably an LS4 but the mystery for me continues now for 30 years and now another guy has the same questions. Was your brothers tach redlined over 55oo RPM and was it cable driven off the distributor,normally a performance(racing)setup? I'm just curious,I mean no disrespect to anyones vette,even the 305 smog engined cars from california are OK by me,as long as they're in a vette.

MidShark

I think the '73 LS4 redline was 5600 (not sure).
Every Corvette from '63-'74 was equipped with a tach-drive distributor, regardless of horsepower.

71scgc

I wish I had the 5 minutes of my life back I just lost reading through this thread.
The data plate on my car says 375hp.
It's a '71.
I changed it out. That plate means diddly.

yankee phil

Thanx,that means I walked a healthy 440 GTX with a purple cam top end with a LS4 smog motor,not bad for an eighty thousand mile engine.

bashcraft

Maybe he gave you that one.