Detuning LM7 to 220HP
TECH Resident
Joined: Jun 2011
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Launching!
Joined: Dec 2013
Posts: 255
Likes: 58
From: Portugal
TECH Senior Member
Joined: Jun 2016
Posts: 22,291
Likes: 3,616
From: Central Cal.
I see your predicament. The caddy only had 140HP to start with. That plus 20% (70HP) is 210 HP.
Too bad they don't use torque figures instead of HP (Or do they??)
Your stock Caddy engine put out 346 #/ft at 2000 RPM.
The LM7 is rated at 315-335 #/ft @ RPM unknown.
Too bad they don't use torque figures instead of HP (Or do they??)
Your stock Caddy engine put out 346 #/ft at 2000 RPM.
The LM7 is rated at 315-335 #/ft @ RPM unknown.
Thread Starter
Staging Lane
Joined: Nov 2019
Posts: 60
Likes: 16
The 1978 has 180HP and has had Danish plates 15 years ago, so no new tax
Thread Starter
Staging Lane
Joined: Nov 2019
Posts: 60
Likes: 16
I wish the 80's and late 70's cars would make that much. A friend has an El Camino that officially has around 350HP. He can pretty much whatever with worse brakes than what I have. It seems like NET vs Gros HP is not taken into account.
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Staging Lane
Joined: Nov 2019
Posts: 60
Likes: 16
Now after actually swapping my 79 DeVille and getting it legal, I can say NO PROBLEM pulling power. I am allowed 218 hp and made around 210 hp at the crank. It was measured on a chassis dyno, with a rolldown cycle to measure drivetrain resistance.
Here is the tune file that made it work.
Here is the tune file that made it work.
On The Tree
Joined: Nov 2023
Posts: 107
Likes: 139
From: South of sweden
Now after actually swapping my 79 DeVille and getting it legal, I can say NO PROBLEM pulling power. I am allowed 218 hp and made around 210 hp at the crank. It was measured on a chassis dyno, with a rolldown cycle to measure drivetrain resistance.
Here is the tune file that made it work.
Here is the tune file that made it work.
Located in Sweden and do what they call a "modified" registration.
/Christian