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Is a dyno tune needed if I go from a 65 to 70mm TB 

 

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 Post subject: Is a dyno tune needed if I go from a 65 to 70mm TB
Posted: Thu Sep 04, 2008 7:48 pm 
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I know It would benefit it, but do you think I could get away without one until I can afford a re tune with a pro-m maf ? I had it all tuned up and then went from a 2.5 inch system to a 3 inch system with high flow metal cats, the idle dropped from around 1,000rpm to 900rpm, the exhaust shop said idle would drop with a big system. So am I already running lean ? Will a bigger tb let more air in and the computer not be able to adjust the mixture ? I know I can't put the new maf on without a re tune because it will really throw the tune out, so I am told.

 

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AUII SR 5.0 Auto, Factory Sports Suspension, 18" T3 Rims, PBR Kit, HPC'd Pace Maker Tri-Y's, 3" System, Crow Cam, Double Row Timing Chain, Push Rods, Yella Terra 1.6's, Edelbrock Performer Manifold & Plenum, SS Inductions CAI, K&N, Flash Tuner. Soon - Tickford 70mm TB and Pro-m 75mm maf.

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Posted: Sat Nov 22, 2008 1:04 am 
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Posted: Sat Nov 22, 2008 1:48 am 
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Unless your engine is turning big rpm, highly tuned..
The 65mm is way big enough...

 

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 Post subject: Re: Is a dyno tune needed if I go from a 65 to 70mm TB
Posted: Mon Mar 09, 2009 11:46 am 
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Putting a pro-m maf and tickford 70mm tb on this week with a dyno tune.

 

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AUII SR 5.0 Auto, Factory Sports Suspension, 18" T3 Rims, PBR Kit, HPC'd Pace Maker Tri-Y's, 3" System, Crow Cam, Double Row Timing Chain, Push Rods, Yella Terra 1.6's, Edelbrock Performer Manifold & Plenum, SS Inductions CAI, K&N, Flash Tuner. Soon - Tickford 70mm TB and Pro-m 75mm maf.

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