Stock 81 250HP+ Engine Mods Question
Thread Starter
Instructor
Joined: Jul 2004
Posts: 143
Likes: 1
From: Dallas TX
Stock 81 250HP+ Engine Mods Question
Hello, I was wondering what heads/cam y'all would recommend for a stock L81. I am only thinking about doing this because my stock ones are cracked. I figure while I'm at it, I might as well get a mild bump in hp/tq. I want to keep the stock manifold, carb, and air cleaner along with the stock exhaust manifolds/system. Like I said, I know this won't be optimum, I just like the all factory look. My thinking on heads is to bump the compression up a bit and run premium fuel...? I'd like to get @250+ HP and @300+ TQ and keep the motor looking stock. I freely admit I'm new at this and feel free to tell me if I'm dreaming! Thanks!
Melting Slicks
Joined: Dec 2015
Posts: 3,181
Likes: 732
From: Texas City, TX Texas
Oops, I did not know there was an L81. At 280 ft lbs stock, I'd say it would be possible to get up to 300 with just heads and a cam, even when you choke it up with the stock manifolds.
Team Owner
Joined: Jan 2007
Posts: 53,648
Likes: 878
From: Southern Cal Ca
St. Jude Donor '22
welcome.
you are thinking correctly, raise C/R.
better heads better flow and increased
C/R.
good luck.
your only limit is cam selection.
you need enough vacuum to allow ecu to
work properly
you are thinking correctly, raise C/R.
better heads better flow and increased
C/R.
good luck.
your only limit is cam selection.
you need enough vacuum to allow ecu to
work properly
Drifting
Joined: Jun 2015
Posts: 1,345
Likes: 753
From: Doctors Inlet Florida
I really like those new Trick Flow 175cc Double hump heads. Installing those with a cam around 218 degrees duration at .050 and you will have a nice bump in power that is still fun to drive.
Instructor
Joined: Nov 2011
Posts: 203
Likes: 163
Hello, I was wondering what heads/cam y'all would recommend for a stock L81. I am only thinking about doing this because my stock ones are cracked. I figure while I'm at it, I might as well get a mild bump in hp/tq. I want to keep the stock manifold, carb, and air cleaner along with the stock exhaust manifolds/system. Like I said, I know this won't be optimum, I just like the all factory look. My thinking on heads is to bump the compression up a bit and run premium fuel...? I'd like to get @250+ HP and @300+ TQ and keep the motor looking stock. I freely admit I'm new at this and feel free to tell me if I'm dreaming! Thanks!
Brandon Unklesbay
All-In Performance, LLC
