Alright let's hear some HP guesses before the tune....
10-25-2011, 11:42 AM
#1
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Alright let's hear some HP guesses before the tune.... Well I finally finished the valve spring swap, fired the car up after the cam. Runs great for an untuned car, the "Check Engine" light was flashing for a bit.. that was a little strange, but it went away and didn't flash again.
Here's the combo
1999 Trans AM
T56
Stock ten bolt
Stock WS6 Exhaust
LS6 intake
Stock 243 heads
Comp beehive springs
EPS 226/234 113, .598/.601
Stock Exhaust Manifolds.
The only thing holding me back are the headers, should I spend the cash on some or get a tune first? What are the guesses on HP before and after headers?
Car goes in for a tune on November 7th.
Here's the combo
1999 Trans AM
T56
Stock ten bolt
Stock WS6 Exhaust
LS6 intake
Stock 243 heads
Comp beehive springs
EPS 226/234 113, .598/.601
Stock Exhaust Manifolds.
The only thing holding me back are the headers, should I spend the cash on some or get a tune first? What are the guesses on HP before and after headers?
Car goes in for a tune on November 7th.
Last edited by IRONFIST; 10-25-2011 at 11:50 AM.
10-25-2011, 01:14 PM
#2
I'd say get the headers first, then tune it.
Actually, you should've started with all the required bolt-ons before going for a cam (UD pulley, CAI, headers, throttle body, exhaust system...etc).
Actually, you should've started with all the required bolt-ons before going for a cam (UD pulley, CAI, headers, throttle body, exhaust system...etc).
10-25-2011, 02:43 PM
#4
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Headers aren't something I would want to do on my driveway. I'll have someone do them eventually. In fact I'm thinking of a before and after header dyno run to see what they are really worth.
10-25-2011, 03:41 PM
#6
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If you have spend the effort in a springs/cam upgrade, why not use the basic bolt ons? I would say cam/springs with a otherwise stock setup (would like to see ported heads with a cam upgrade..) you will not see a significant increase in rwhp. 3-5% range. Have you tuned the car at all before the changes? I frequently can "find" 10-20 hp for my customers by just running a basic tune on a stock ls. If this is the case, going from untuned to cam/springs+tune might give you an 8-15% increase depending on the tuner..
10-25-2011, 05:02 PM
#7
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If you have spend the effort in a springs/cam upgrade, why not use the basic bolt ons? I would say cam/springs with a otherwise stock setup (would like to see ported heads with a cam upgrade..) you will not see a significant increase in rwhp. 3-5% range. Have you tuned the car at all before the changes? I frequently can "find" 10-20 hp for my customers by just running a basic tune on a stock ls. If this is the case, going from untuned to cam/springs+tune might give you an 8-15% increase depending on the tuner..
I understand that headers would net me a pretty good gain, but I'm going to dyno it as is right now and see what it puts down.
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11-17-2011, 07:09 PM
#11
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11-18-2011, 08:46 PM
#12
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I wouldnt be dissapointed, 350 is actually pretty good for just a cam...
Check out my SIG, and I'll let you know what my HP at the wheels was.
Getting my Dynotune Tomorrow, 11/19/11.
Talk to you all soon...
11-20-2011, 04:12 PM
#13
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What does this all mean you ask? Just proof positive that you can't drag race a dyno. Numbers may be neat for bragging rights, but where it counts is at the track, and that is where you will see it make a difference.
