L79/L46 Dyno information
Race Director
Joined: Feb 2000
Posts: 12,431
Likes: 1
From: CT
Re: L79/L46 Dyno information (Vetteboy)
im still lost here though. he says he puts 208Hp to the ground. so then i know for an auto you add about 20% for drivetrain lose. then you have the engines power. why would you then add another 15%? when you have the RWHP number it shouldnt matter when the motor was rated. why am i so :confused:
Drifting
Joined: Mar 2001
Posts: 1,395
Likes: 6
From: Indiana
Re: L79/L46 Dyno information (SuperFast80)
Difference between/discount from gross to net:
1971 LT-1: 330 GROSS/255 NET = 22.7% 'loss'
The L79 was 350 GROSS. You need to discount to net THEN to rear wheels.
That's pretty interesting. I would have never thought the difference in gross to net would be that much. Could it be that they went to hyd cam in 72 on the Lt-1 or was that in 71 :confused: Some of my books say that the 71 was hyd, but I have talked to a guy that use to have a 71 LT-1. He said it was solids. Does anyone know the answer to this?
All 70-72 LT-1s were solids.
In 1971, heads went from 66(or 64)ccs to 76cc to drop compression to 9:1. Also, I know 71-72 pistons were flat top but I *think* 70 had domed tops.
1971 and 1972 are the same engines - just that 72 was rated net.
1971 LT-1: 330 GROSS/255 NET = 22.7% 'loss'
The L79 was 350 GROSS. You need to discount to net THEN to rear wheels.
That's pretty interesting. I would have never thought the difference in gross to net would be that much. Could it be that they went to hyd cam in 72 on the Lt-1 or was that in 71 :confused: Some of my books say that the 71 was hyd, but I have talked to a guy that use to have a 71 LT-1. He said it was solids. Does anyone know the answer to this?
All 70-72 LT-1s were solids.
In 1971, heads went from 66(or 64)ccs to 76cc to drop compression to 9:1. Also, I know 71-72 pistons were flat top but I *think* 70 had domed tops.
1971 and 1972 are the same engines - just that 72 was rated net.
Tom
