Ported 243 heads versus stock L92
04-28-2013, 10:56 PM
#22
9 Second Club
iTrader: (3)
Join Date: Sep 2010
Location: Mesa, AZ
Posts: 411
Likes: 0
Received 0 Likes
on
0 Posts
I see this thread has been resurrected.
Last year I changed to a 4150-style EFI intake with a GM-compatible Throttle body. This lets me me use a retro-style 14" air filter and the "air injection" off the windshield and through the hood. It looks like this:
This change boosted my speed by 3 mph (to 117) and lowered by ET by .2 sec.
Last year I changed to a 4150-style EFI intake with a GM-compatible Throttle body. This lets me me use a retro-style 14" air filter and the "air injection" off the windshield and through the hood. It looks like this:
This change boosted my speed by 3 mph (to 117) and lowered by ET by .2 sec.
Last edited by RobsZ28; 04-28-2013 at 11:03 PM.
04-28-2013, 11:28 PM
#23
Moderator
Thread Starter
The engine came with a custom cam - 231/237 with .612/.607 lift and a very tight 111 LSA. While it has a bit more top end, it was very difficult to tune. I prefer the 54-459-11. Note this requires dual valve springs and creates a noisy valve train.
04-29-2013, 12:38 AM
#24
9 Second Club
iTrader: (3)
Join Date: Sep 2010
Location: Mesa, AZ
Posts: 411
Likes: 0
Received 0 Likes
on
0 Posts
I currently have the Comp Cams 54-459-11 in it. It has 231/239 duration (@ .050) with .617/.624 lift and a 113 LSA. The Piston-To-Valve clearance is only .045 in my LS2. Plenty of torque - I spin my 17" Nitto DR and will have to get a new set of 15" MT to have any chance of hooking.
The engine came with a custom cam - 231/237 with .612/.607 lift and a very tight 111 LSA. While it has a bit more top end, it was very difficult to tune. I prefer the 54-459-11. Note this requires dual valve springs and creates a noisy valve train.
The engine came with a custom cam - 231/237 with .612/.607 lift and a very tight 111 LSA. While it has a bit more top end, it was very difficult to tune. I prefer the 54-459-11. Note this requires dual valve springs and creates a noisy valve train.
04-29-2013, 06:51 AM
#25
On The Tree
iTrader: (3)
Join Date: Dec 2007
Location: Mobile, AL
Posts: 163
Likes: 0
Received 0 Likes
on
0 Posts
I spun my L92 heads with stock valves to 7400-7600 (on occastion). LS7 lifters, trunion upgraded rockers, and .675 lift springs.
Imo the growing room you gain with L92/LS3 heads is worth it alone. I would also bet theres a good possibility stock L92 heads probably flow the same if not more than your ported 243.
Imo the growing room you gain with L92/LS3 heads is worth it alone. I would also bet theres a good possibility stock L92 heads probably flow the same if not more than your ported 243.
05-03-2013, 01:00 PM
#29
On The Tree
iTrader: (3)
Join Date: Dec 2007
Location: Mobile, AL
Posts: 163
Likes: 0
Received 0 Likes
on
0 Posts
I should have my car back together within the next month or so.
