3" exhaust = POWER!!
#13
Senior Member
Certified Car Nut
Join Date: Oct 2003
Posts: 19,756
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Dans2002bonne
The 240 HP is not stock wheel power. Most are around the 190'* in stock form.
#14
Senior Member
True Car Nut
Join Date: Dec 2002
Location: Sauk Centre, MN
Posts: 5,459
Likes: 0
Received 0 Likes
on
0 Posts
I've heard that these L67'* can be very different -some dynoing under the advertised 240/280, but alot more have actually dyno'ed over, especially in the lb ft department.
#16
Senior Member
True Car Nut
Join Date: May 2003
Location: Holt, MI & Lima, OH
Posts: 3,022
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by OLBlueEyesBonne
I've heard that these L67'* can be very different -some dynoing under the advertised 240/280, but alot more have actually dyno'ed over, especially in the lb ft department.
However, a 3" exhaust is too large for these cars. I would bet the only reason power was gained was due to the reduced KR from the exhaust/rockers. My dads GTP with no exhaust (headers and 3" downpipe only) dynoed 304whp, with his 2.25" borla it made 315whp. He gained 11whp when he put his 2.25" exhaust back on. And obviously his car is a little more than mildly modded.
So when did you put the PCM in??? The first pull says 3.4 pulley only. Second pull says 3.4 pulley, 1.9 rockers, 3" exhaust. Yet, your sig says you also have a DHP!?!?
Shawn
#17
Senior Member
True Car Nut
Join Date: Dec 2002
Location: Sauk Centre, MN
Posts: 5,459
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by dbtk2
Originally Posted by OLBlueEyesBonne
I've heard that these L67'* can be very different -some dynoing under the advertised 240/280, but alot more have actually dyno'ed over, especially in the lb ft department.
Shawn
#18
Senior Member
Certified Car Nut
I think 3" exhaust is a good setup, for a modded L67, especialy series II. It would be more beneficial on a car with nice headers, but all in good time. Frankly More Lower end torque isn't needed, L27'* can spin tires past the torque peak with ease, Upper RPM power is what the 3800 is missing. You only hit your torque peak once in the 3800 when you're racing.
Willwren'* car is bolt-ons at this point. he'* got some good stuff down the line, but not yet.
Willwren'* car is bolt-ons at this point. he'* got some good stuff down the line, but not yet.