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Which Mods to make?

jnj

Well-known member
Joined
May 12, 2004
Messages
107
Location
SoCal
Corvette
2001 Magnetic Red Convertible
Hello all,
Can an improved intake system really make a difference without upgrading the exhaust in a Z06? Vice-Versa, can an aftermarket exhaust increase power without an improved intake system. A friend wants to add the K&N intake system with a new Chip to his 03 Z06 with the stock exhaust. Will he really get the advertised HP gain, or is it best to do both ends at the same time??
Thanks in advance~
Jeff
 

silver98

Well-known member
Joined
Oct 21, 2004
Messages
202
Location
southeast PA
Corvette
1998 Sebring Silver Coupe
its been my experience that a CAI will improve the ' seat of the pants' feel with some HP gains. The 'cat-back' will do not much more than change the sound, but a new exhaust header system, like long tube headers will provide an increase in RWHP.
 

JBsC5

Well-known member
Joined
Nov 28, 2001
Messages
1,216
Location
Northern NJ
I'd suggest leaving the pcm alone...unless you have it professionally tuned.

The C5 Z06 titanium catback is very efficient and very very little power is found by going to an aftermarket system.

The intake either Halltech, or vararam..( I don't know the K & N system)

would be my suggestion.

"chips" are worthless on the C5.

Good luck

JB
 

TODD L GRIFFITH

Well-known member
Joined
Jul 12, 2001
Messages
1,120
Location
Middleboro, MA
Corvette
99' MR Coupe, 04' Silverado 03' ZO6 Sold
I'd suggest leaving the pcm alone...unless you have it professionally tuned.

The C5 Z06 titanium catback is very efficient and very very little power is found by going to an aftermarket system.

The intake either Halltech, or vararam..( I don't know the K & N system)

would be my suggestion.

"chips" are worthless on the C5.

Good luck

JB
I agree with JB, tuning with a chip or programmer is like a shot in the dark, or is limited. It is best to have someone with EFIlive, LS1edit or HP Tuners tune the car first by a data logging road test to get things dialed in after mods. are complete. The ultimate is a dyno tune after the data logging.
 

Willfulone

Well-known member
Joined
Nov 12, 2006
Messages
223
Location
VA
Corvette
2004 CE Coupe
The computer will re-learn the increased air flow after about 100-200 miles on it's own. Your Z06 exhaust can flow more air than a new intake will introduce.

Peace
Chip
 

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