How much will and exhaust cutout help my 1/4?
Thread Starter
Registered User
Joined: Apr 2002
Posts: 1,048
From: South Lyon, Mi.
How much will and exhaust cutout help my 1/4?
I am trying to find out how much time I can cut off of my 1/4 mile times with an exhaust cutout? my car is a 2002 Z28 m6 with a ram air hood and air box/K&N filter, stock exhaust and only some suspension upgrades, also how much will some lca's help my launch over the flimsy stock ones?
Administrator
Joined: Mar 1999
Posts: 3,664
From: Brunswick, Maine 04011
The stock exhaust is pretty good on the newer cars with light mods. A cutout may get you a tenth or two and maybe a mph or two.
In terms of launching, I would get some sticky tires before adding suspension pieces. Nitto or BFG drag radials work pretty well.
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'94 Black Z28, 383, 700R4
1/8 ET: 7.49
1/4 ET: 11.86
1/4 MPH: 112
http://www.downtime.cz28.com.index.html
In terms of launching, I would get some sticky tires before adding suspension pieces. Nitto or BFG drag radials work pretty well.
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'94 Black Z28, 383, 700R4
1/8 ET: 7.49
1/4 ET: 11.86
1/4 MPH: 112
http://www.downtime.cz28.com.index.html
Member
Joined: Jan 2002
Posts: 1,697
From: Bay Area, CA
I just put a cutout on mine. Each time I ran with it open, it gave me a consistant .1 sec off my 1/4 mile time, and about 2 mph.
-Jeff
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1998 NBM Z28, A4 2.73, Chrome 10-spoke SS rims, RK Sport ground effects, QTEC, Flowmaster, CAI, LS1 Motorsports Lid, K&N, MSD wires, custom painted interior.
**On Order:
SLP Ultra-Z Ram Air Hood. **
Best ET: 13.665 @ 103.25
Best 60': 2.114
Best reaction : 0.715
-Jeff
------------------
1998 NBM Z28, A4 2.73, Chrome 10-spoke SS rims, RK Sport ground effects, QTEC, Flowmaster, CAI, LS1 Motorsports Lid, K&N, MSD wires, custom painted interior.
**On Order:
SLP Ultra-Z Ram Air Hood. **
Best ET: 13.665 @ 103.25
Best 60': 2.114
Best reaction : 0.715
Registered User
Joined: Nov 2001
Posts: 116
From: Edmond, OK USA
The cutout has been a mixed blessing for me - it shows some gains, but I seem to notice a decrease in torque. Anyone else notice this?
KASR
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94 Z28 Hardtop - (stock: 10.5:1, 5.7L, rated 275hp@5200, 325lb@2400, MFI - Current Rating: ???)
Throwing money at the hungry beast and moddin' away like a mad-man =) Holley CAI, !TB, !MAF, Flowmaster Catback, Monza Quad Tips, 3" cutout, 3.23 gears GU5/G80 perf. axle, QLC, 4L60-E, Spectre Breather and Filter, Autolite 103 plugs, wires, and filter, MSD 6A, Compucar n20 125, Comp TA BFG Drag Radials
MODS TO COME: Jet-Hot Hooker Long Tubes, Yank 3000 TC, cc305 cam, 1.6 rockers.
KASR
------------------
94 Z28 Hardtop - (stock: 10.5:1, 5.7L, rated 275hp@5200, 325lb@2400, MFI - Current Rating: ???)
Throwing money at the hungry beast and moddin' away like a mad-man =) Holley CAI, !TB, !MAF, Flowmaster Catback, Monza Quad Tips, 3" cutout, 3.23 gears GU5/G80 perf. axle, QLC, 4L60-E, Spectre Breather and Filter, Autolite 103 plugs, wires, and filter, MSD 6A, Compucar n20 125, Comp TA BFG Drag Radials
MODS TO COME: Jet-Hot Hooker Long Tubes, Yank 3000 TC, cc305 cam, 1.6 rockers.
Registered User
Joined: Feb 2002
Posts: 65
From: Canal Winchester, OH
i have an slp loudmouth and noticed the decrease in torque.
it has more hp i imagine because it definetly seems to go faster from 30 + but its not as easy to break the tires loose as it was with the stock exhaust
it has more hp i imagine because it definetly seems to go faster from 30 + but its not as easy to break the tires loose as it was with the stock exhaust
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