Was wondering what the difference was between the 327 360HP and the 327 350HP motors was? How did either of these compare with the 327 FI as far as straight line performance goes?

 

one was a solid litfter one was not

 

And I think otherwise they were completely identical, weren't they? Same carb, intake, heads, maybe the same distributor curve?

 

The 360 hp engine was a '62-'63 FI. Did you mean to compare the 350-365 hp to the 375 hp FI engine?

 

350 versus 365 - that's certainly what I was thinking. I'm suffering from head-up-my-butt syndrome today and didn't pick up on that 360 versus 365 subtlety.

 

Was wondering what the difference was between the 327 360HP and the 327 350HP motors was? How did either of these compare with the 327 FI as far as straight line performance goes?



62-63 Fuelie (L84) was rated 360 HP. 64-65 fuelie was rated at 375 HP.
L76 n/a 62. 63 L76 was rated at 340 HP. 64-65 L76 was rated at 365 HP.
65-68 L79 was rated at 350 HP.

L84/L76 were identical in every way, except the induction system. All used 5 quart pan, with windage tray, solid lifter cam, high pressure oil pump, deep groove pulleys. None were available with P.S. Pistons/crank/distributor, etc, etc were common to both. Fuel unit had higher flow capacity than carb, and so delivered a few more horsepower. These were true SHP engines.

64-65 L84/L76 differed from 62-63 versions in that they used 2 1/2" diameter rams-horns, as opposed to 2" versions. 64-65 used Holley carbs, as opposed to Carter AFB. Intakes were same design, but different casting to accommodate carb change. Earlier CR was 11.25:1 vs. 11.0:1 for 64-65.THE BIGGEST DIFFERENCE was the use of the "30-30" cam on the 64-65, as opposed to the "Duntov" cam of the 62-63. "30-30" cam had much more duration/overlap than the "Duntov". It was much more peaky, with noticeably lumpier idle, and more horsepower. (This same camshaft was used on the 302 c.i. Z28s of 67-69.) This was, by far, the most "high strung" camshaft that Chevrolet ever installed in a factory smallblock. These engines were not available with power steering.

L79 used a hydraulic cam, and smaller, 4 quart pan. Had less aggressive advance map. Used identical internal and external parts as 1965 L76, including carb, manifolds, crank, pistons, balancer, water pump, deep groove pulleys. Although it used a hydraulic camshaft, and standard pressure oil pump, Chevrolet chose to call this a SHP (special high performance) engine. This engine was more docile and streetable than the L76/L84, with more torque but less top end horsepower. Was available with P.S.

Joe

 

So I can assume the 1965 FI was the fastest 327 that year and that the 396 was the fastest stock Corvette built up until that time even though the FI was more money.

 

those L-79 were dogs........

 

:

 

especially on low end; a 300 would clean it's clock out of the hole; but, it would come on strong in 4th...
Bill

 

Bill, did you read my signature ??

 

no??????
Bill

 

Not when you changed the rear gear to a 4:11!!!!!

 

I guess not everyone sees the signatures:

this is mine

Pure Stock Racer: L79: 327/350 horse
.030 over 151 GM cam 461 heads no port, polish, or gasket match 11:86 measured compression
585 cfm Holley 3367 carb 490 intake M21 trans 4.56 gear 2 inch exhaust manifolds bias ply tires
best ET 13.46 @ 104.02 best 60 foot 1.98
All ready looking forward to the 2008 Pure Stock Drags !

 

I'd have to disagree the 300 hp engine will beat a 350 until fourth gear.

Both of them spin the tires, when the tires quit spinning, you're up high enough in the rpm range, any loss of low end torque of the 350 cam is now working in it's favor. It's bye-bye 300.

The only way a 300 would have an acceleration advantage over a 350 is if the drivers of both cars mashed the throttle at 10 mph in high gear.

Same way with the 30-30 cammed 365/375 horse engines.

 

Mike
just my experience from street racing back a lonnnnnnnnng time ago...
Bill

 

Hi Donny,

13.46 must be because of the 4.56 axle, the nitrous, and the L88 cold air induction hood. Yeah, I saw yer signature when you answered my post "tongue in cheek".
Real SHP engines were not available with PS.
Chevrolet called the L79 a SHP because they were ready to kill the L76/L84 for late '65. They needed a smallblock SHP engine, so the mild mannered L79 was elected. The heavy, lunking MKlV was the ticket to torque/horsepower, and so the smallblock's development was abruptly cancelled.
Because of this, big blocks ruled........until the EPA stepped in in 1968. The handwriting was on the wall, and by 1973, all power was sapped from performance engines.
But wait.................Chevy decided to resurrect the mousemotor. This time, they started with the 30-30 cam, opened up the lobe centers, swapped in a L82 exhaust lobe. This detuned L76 was called the LT1. It was to be the king of Chevy smallblocks in the smog era.


Joe

 

This debate about "who beats who", the 300 or 350 horse 327 is dopey.
In a 1985 test by Car and Driver mag, the L98 holeshotted a 1967 L88 so badly, that the L88 caught and passed the L98 only in the last 50 yards of the track! No...................the L88 didn't smoke its tires.

 

Well, I didn't know this was a debate. I've had a 250, 300, 340, 350, 360 and 375 horse 327. I raced every one of them so I have a fair idea what is what.

I've also had a 350/350 and driven the Lt-1.

Your tale of woe about a L98 (don't even know what that is) blowing the doors off a L-88 is what is totally silly. In 1985, the car magazines would have feature after feature about how the "new cars" could beat the old ones. That's the only way they could get zit-faced 15-16 year olds to buy their magazines. Wowee, geez, look at this!


"Chevrolet called the L79 a SHP because they were ready to kill the L76/L84 for late '65. They needed a smallblock SHP engine, so the mild mannered L79 was elected."

I don't know where you got this tidbit?????????????

 

Okay, it's not a debate. Let's just call it a very, very far ranging discussion. Sorts like trying to compare apples to oranges.
It's not a tail of wow. It's the truth. Don't you remember how much C/D mag hated Murrican cars back in the mid 80's? They only loved Porches! It was shocking and tittilating to hear them rave about the 1985 Corvette. Partick Bedard and Don Sherman were all foamed-up about the new Corvette.
The L98 (TPI Corvette engine 1985-1991) was a very, very torquey engine, and with the 3.06 first gear in the 700R4, it killed the L88 out of the hole. The L98 is fun to drive, but starts gasping at about 4500 RPM.
The titbit about the SHP L79? I made it up. Okay, Mikey. What's your take on it, then?