Stingray Mark

Just out of curiousity guys, will a LT1 take an L36? I know the LT1 is a high redline kick-butt engine with 370hp and was wandering if it could take a 390 horse 427 in the quarter-mile :auto: :chevy

Ganey

It could, depends ...

Tom73

I checked the Corvette Archive for period road tests but could not find anything on the L36.

SportsCar Graphic had a road test in June 70 issue of the LT1. 0-60 in 5.7 and quarter in 14.5@99.5

Car & Driver June 71 had a test of the LS5, 0-60 in 5.7 and quarter in 14.20@100.33

Just remember the tires back then :)

tom...

SuperFast80

http://www.corvettearchive.com/image...ly69/69-13.jpg

1969 L36 - 15.02/93.45

However, i am sure that a few guys on here like MNJack and MELVIN have run stock or basically L36s into the 13s at 100+

That particular test is part of a 12 car test with slow times all around.

Robert N

Those tests were also done on bias tires, not radials. Based on comparisons with vehicles of similar weight/HP readings, talking to other LT-1 owners, seeing some of their times, and accounting for better tracks and tires, both cars should be closer to 5.4 or 5.5.

Barrys70LT1 (member) ran his factory spec without the alternator belt, with a Holley 750dp and headers at 13.02 and figured it should easily break 13 sec.
That also puts the HP at closer to 400 or better.

Even at at 370 HP rating, the LT-1 carries less weight and the 20 HP difference if the L36 might not be enough to overcome that. If the true HP of the car was greater than 370, I suspect the LT-1 would better it in the quarter mile.

That said, I would suspect that the L36 should be faster of the line based on greater (I am pretty sure they are) torque numbers.

Would be interesting though.

Stingray Mark

I have a hard time finding track numbers for a basically stock L36 vette... thanks guys. The reason I ask is because my father has a 1969 vert L36... I doubt it would take an lt1 since it has A/C and its not a coupe not to mention the wide ratio m20. Just out of curiousity how much of a weight difference between a Lt1 coupe and a 69 L36 coupe? I was thinking Lt1's were usually low optioned cars... :chevy :thumbs:

Tom73

This is highly vairable. All depends upon the options of the cars involved. Only numbers that I have is for the '73 Vette and there the LS4 4-speed would add 211 lbs over the base L48 small block or 169 lbs over the optional L82 small block 4-speed.

So you are looking at about 200 lbs plus any options. (the '73 A/C added 90 lbs).

tom...

BeaterShark

Gears 1, 2, and 3 are spaced the almost the same for both M20 and M21/22. It's the spacing between 3'rd and 4'th where the "wide ratio" comes into play.

LT1driver

M20 wide ratio should give better 1/4 times since it would have greater gear multiplication, i.e. 3.70 rear times 2.52 =9.32 whereas m21/22 is 220 x 3.70=8.14, far worst at acceleration of car. m21/22 is road race trans. :cheers:

LT1driver

OK, just remembered a race I had in the early 70s in my stock m-20, 454/390 with 3.08 rear against a 67 nova with m20, 3.70 rear and LT-1 motorwith headers. From a 30mph roll he jumped out on me, by the time we hit 100 I was rolling past him pretty quick. His car with 9 in slicks on it ran low 13s at a local drag strip. :cheers:

Rowdy Rat

Any idea what kind of trailers these cars were towing when they turned these times? :lol:

Both cars should be able to see very low 13s with a little attention to detail in the tuning department and a talented driver.

There is a certain Canadian 1970 LT-1 Nova that has gone low 13s on bias ply tires and high 12s on drag radials... Stock exhaust system, emissions equipment, etc... I would imagine that a 1970 LT-1 Corvette should be able to match that.

Regards,

Robert N

Stan, given that the Corvette should match the Nova, would it out run the L36?

Any idea on 0-60 times based on those numbers?

PS: High 12s would put HP (at the crank) at 400, rwhp about 318.

Stingray Mark

thanks for the info guys :thumbs: keep it commin :rofl: :steering:

Rowdy Rat

Robert,

Given stock/reproduction F70-15 nylon belted tires, I'd give any advantage to the LT-1... Although it will still be close. Low end torque is great, but it's worthless if you can't use it. Going to a drag radial or slicks would be a huge advantage for the big block car. My guess is it would pull a couple of car lengths at the start and never give it up.

I don't recall any 0-60 times although I seem to recall sixty foot times in the low 1.9s with the bias ply tires. The runs were part of a tire test using three different (stock) cars and appeared in one of the last issues of Musclecar Review... I'll see if I can locate it tonight.

The test was enlightening... The drag radials did provide better times than the bias ply tires, but not as much as you would think. The bias ply tires are a lot better than people give them credit for. There's a lot to be said for having a talented driver behind the wheel who knows how to get the car off the line quickly.

I think 400 horsepower is well within reach... Even through the stock exhaust. Good machine work and attention to detail will make the difference.

Regards,

Robert N

Stan. Thanks. Very interesting info.

Stingray Mark

Dont big blocks usually start to pull away towards the end of the quarter mile? :chevy :confused: