Poor power gain
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Poor power gain
I had the following on my evo 9 (8K miles)
Walbro 255 lph Fuel Pump
Sun Automotive Exhaust System - Evo Garage HRS Exhaust
Hallman Boost controller PRo RX KIT
Helix EVO 8 hight-flow cat 200 cell
HKS super hybrid panel filters
Tanabe Downpippe 2.75"
Boost Gauge & controller unit
FullRace Pro Stock turbo manifold
Before tuning: baseline on mustang dyno yield 228 ft lb torque, 262 whp. This is way too low on 91 octane.
After tuning it's putting roughly 260 ft-lb 260 whp.
We all expected 300+ wtq and 300+ whp after the tune and baseline should be around 270ish.
The tuner will do a leak test and put in a test pipe. He said it's almost certainly that because of the gas. The day before I was putting 91 from Valero. He said octane 91 at 76 station is totally different.
Is there any other possible reason for this disappointing numbers?
Walbro 255 lph Fuel Pump
Sun Automotive Exhaust System - Evo Garage HRS Exhaust
Hallman Boost controller PRo RX KIT
Helix EVO 8 hight-flow cat 200 cell
HKS super hybrid panel filters
Tanabe Downpippe 2.75"
Boost Gauge & controller unit
FullRace Pro Stock turbo manifold
Before tuning: baseline on mustang dyno yield 228 ft lb torque, 262 whp. This is way too low on 91 octane.
After tuning it's putting roughly 260 ft-lb 260 whp.
We all expected 300+ wtq and 300+ whp after the tune and baseline should be around 270ish.
The tuner will do a leak test and put in a test pipe. He said it's almost certainly that because of the gas. The day before I was putting 91 from Valero. He said octane 91 at 76 station is totally different.
Is there any other possible reason for this disappointing numbers?
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#10
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Originally Posted by Rnm
91 octane and the high flow cat seem like the culprits for low power.
Edit: Just read he put ... Valero gas in his car? Uhhh bad idea.
Last edited by dayf; Sep 15, 2006 at 04:01 PM.
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I'm fairly positive it's not the tuner nor dyno machine. They have done many evo 300+. One with similar setup as mine except without the full race manifold and cat was putting down almost 300 whp and wtq. We copy this mappings to mine and it still putting down very low number. Could there be any other reason besides octane rating? They told me cat may clog up too so they're putting in a test pipe now.
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+3 on the tuner, I highly doubt an almost new high flow cat will be clogged. I'd say tell them to pressure test the intake system and actually tune your car specifically instead of copying someone else's map.
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You're putting crap gas in your car but spending money to mod it. Time to rethink your priorities, perhaps.
Last edited by dayf; Sep 16, 2006 at 09:49 AM.