Do new headers require more boost.
Thread Starter
Instructor
Joined: Mar 2003
Posts: 131
Likes: 0
From: Bath PA
Do new headers require more boost.
I installed an ATI D-1SC supercharger 3 years ago and kept the stock headers and exhaust. A year later, probably in April, I had Kooks headers and and an exedy clutch installed. Later that year, I went to Corvettes at Carlisle. I had the car Dyno'd. It did about 438 HP. It looked to be running to lean. I had it adjusted and came back the next year and dyno'd it after making the fuel adjustments. It did a little better with 458 HP, but nowhere near the 492 I was accustomed to.
I installed Borla Stingers this year at Carlisle but, the Dyno guy packed up early on Sunday, so I did not get to see if it made a difference.
Is it really as simple as turning up the boost ? I need to check out the boost gauge while I am at my neighborhood dyno. It will give me a better idea what the boost levels are. Just hard acceleration I see around 6 pounds. The car was set up for 8.
Any thoughts or comments would be appreciated.
I installed Borla Stingers this year at Carlisle but, the Dyno guy packed up early on Sunday, so I did not get to see if it made a difference.
Is it really as simple as turning up the boost ? I need to check out the boost gauge while I am at my neighborhood dyno. It will give me a better idea what the boost levels are. Just hard acceleration I see around 6 pounds. The car was set up for 8.
Any thoughts or comments would be appreciated.
Former Vendor
Joined: Jun 2002
Posts: 2,045
Likes: 3
From: Bridgewater Ma
Originally Posted by juriah
I installed an ATI D-1SC supercharger 3 years ago and kept the stock headers and exhaust. A year later, probably in April, I had Kooks headers and and an exedy clutch installed. Later that year, I went to Corvettes at Carlisle. I had the car Dyno'd. It did about 438 HP. It looked to be running to lean. I had it adjusted and came back the next year and dyno'd it after making the fuel adjustments. It did a little better with 458 HP, but nowhere near the 492 I was accustomed to.
I installed Borla Stingers this year at Carlisle but, the Dyno guy packed up early on Sunday, so I did not get to see if it made a difference.
Is it really as simple as turning up the boost ? I need to check out the boost gauge while I am at my neighborhood dyno. It will give me a better idea what the boost levels are. Just hard acceleration I see around 6 pounds. The car was set up for 8.
Any thoughts or comments would be appreciated.
I installed Borla Stingers this year at Carlisle but, the Dyno guy packed up early on Sunday, so I did not get to see if it made a difference.
Is it really as simple as turning up the boost ? I need to check out the boost gauge while I am at my neighborhood dyno. It will give me a better idea what the boost levels are. Just hard acceleration I see around 6 pounds. The car was set up for 8.
Any thoughts or comments would be appreciated.
Thread Starter
Instructor
Joined: Mar 2003
Posts: 131
Likes: 0
From: Bath PA
Thanks guys for your responses. The first year I had the tuning checked. Tuner said it was OK. Belt is only about 1.5 years old, it does squeak once in while. I going to make an appointment to for the Dyno and see what the boost gauge tells me.
How accurate are the typical gauges inside the car ?
How accurate are the typical gauges inside the car ?
Thread Starter
Instructor
Joined: Mar 2003
Posts: 131
Likes: 0
From: Bath PA
When I had the 492 the car was completely stock other than a supercharger and inter cooler. After that I install the headers, high flow cats and clutch (still had OEM exhaust). Put the Borlas on it at Carlisle last month.
I really can't think of anything else that may have change the output.
I really can't think of anything else that may have change the output.
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Le Mans Master
Joined: Sep 2003
Posts: 6,272
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From: Farmington CT
Cruise-In VII Veteran
Originally Posted by juriah
Thanks guys for your responses. The first year I had the tuning checked. Tuner said it was OK. Belt is only about 1.5 years old, it does squeak once in while. I going to make an appointment to for the Dyno and see what the boost gauge tells me.
How accurate are the typical gauges inside the car ?
How accurate are the typical gauges inside the car ?
Instructor
Joined: Nov 2000
Posts: 155
Likes: 0
From: Houston Tx
Havinbg to add more boost to "keep" the power you had before makes no sense to me. Making less bost (but more hp/tq) should be the case. If not, what would be the point of spending 2 grand on headers?
