QUESTION for you MOTOR HEADS!!!
Thread Starter
Racer
Joined: Mar 2008
Posts: 264
Likes: 0
From: stockton - Near Sac. Town Cali
QUESTION for you MOTOR HEADS!!!
ok. i have a 97 m6 coupe with 90k miles and i am looking at putting a LG long tube header system without cats.
I have a aftermarket intake, (goes from one pipe and splits into two with airfilters on each end, like a double snorkel)
i have 8.5mm spark plug wires,
i have a route 66 exhaust,
i also have electric cutouts
what kind of hp/trq. numbers would i be looking at with/without a tune.
should i run high flow cats.
also any problems i may come across while installing.
thanks guys
I have a aftermarket intake, (goes from one pipe and splits into two with airfilters on each end, like a double snorkel)
i have 8.5mm spark plug wires,
i have a route 66 exhaust,
i also have electric cutouts
what kind of hp/trq. numbers would i be looking at with/without a tune.
should i run high flow cats.
also any problems i may come across while installing.
thanks guys
Le Mans Master
Joined: Sep 2007
Posts: 7,604
Likes: 8
From: Belleville Il
Your filter system and mufflers are actually giving about 5 maybe 10 hp total,,not really much to be gained with those! Vararam will give a little better "on road" performance due to an actual ram air effect. Headers w/no tune from what I've read I would estimate about 15-20 hp. Go high flow cats,,no significant gain catless. Even with high flows you will eventually start throwing code without a tune,,from what I've read even long tubes with stock cats usually start throwing codes. Not a header expert,,just read a lot,,and I saw where nobody was stepping up,so I thought I'd try to help!!
Oops,,just noticed you are from California,,with your CARB situation you will be confined to shorties with a CARB # attached and stock cats!!
Oops,,just noticed you are from California,,with your CARB situation you will be confined to shorties with a CARB # attached and stock cats!!
Last edited by itzza427; Oct 7, 2008 at 11:38 PM.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I AGREE!
The wires will also give you ZERO HP/TQ improvement!
You can also install a ported TB and a 180 deg thermostat. You can also purchase 1.8 ratio rockers to get a bit more lift. If you want to play a little, remove the intake and do some port matching for a little extra kick.
Once you get as much as your going to add done you need a tune if you install LT Headers to get the most out of your eng.
BC
The wires will also give you ZERO HP/TQ improvement!You can also install a ported TB and a 180 deg thermostat. You can also purchase 1.8 ratio rockers to get a bit more lift. If you want to play a little, remove the intake and do some port matching for a little extra kick.
Once you get as much as your going to add done you need a tune if you install LT Headers to get the most out of your eng.
BC
