nsideration
91 Vette l98....good mods..
Team Owner
Joined: Dec 2000
Posts: 21,094
Likes: 282
From: Phila., PA burbs
The stock TPI intake and exhaust are both very restrictive. These areas would be a good place to start. When I did the first round of mods on my 91 this is where I saw the biggest gains. 
Thread Starter
8th Gear
Joined: Jun 2014
Posts: 8
Likes: 0
From: Texas
I was looking online at the vortex ram air it's like $170, and exhaust do you mean headers,cats the whole nine??, what about ECM tuning??
Safety Car
Joined: Jan 2004
Posts: 3,783
Likes: 15
From: Northern California
Vortex RamAir is not worth the price. Just cut the metal louver section out of the stock air lid cover and install any cotton gauze air filter you want for better airflow.
The Intake manifold and aftermarket Runner tubes can be ported to allow more airflow also, Long tube Headers really wake the L98 engine up!...
.
The Intake manifold and aftermarket Runner tubes can be ported to allow more airflow also, Long tube Headers really wake the L98 engine up!...
.
Last edited by GKK; Jun 17, 2014 at 10:36 PM. Reason: Added "Aftermarket"
Thread Starter
8th Gear
Joined: Jun 2014
Posts: 8
Likes: 0
From: Texas
Vortex RamAir is not worth the price. Just cut the metal louver section out of the stock air lid cover and install any cotton gauze air filter you want for better airflow.
The Intake manifold and Runner tubes can be ported to allow more airflow also, Long tube Headers really wake the L98 engine up!...
The Intake manifold and Runner tubes can be ported to allow more airflow also, Long tube Headers really wake the L98 engine up!...
Team Owner
Joined: Dec 2000
Posts: 21,094
Likes: 282
From: Phila., PA burbs
As far as the exhaust, headers are definitely the biggest gain. Hedman and Hookers are fairly reasonable ($500-600) and other manufacturers go up from there. The rest of the exhaust is also pretty restrictive with the two y-pipes and a single cat design. If you're on a budget the LT1 system is a nice upgrade as it has true duals and larger diameter pipes.
You have to decide what the goals are for your car. If your just looking for a modest increase in power then the exhaust and intake mods mentioned might fit your bill. If you're looking for substantially more power then at some point you'll start considering aftermarket heads/cam and other intake options.
Last edited by TA; Jun 17, 2014 at 10:47 PM.
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and what is your budget? Is affordable $100 or $1,000?
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