Throttlebody and Intake Plenum Upgrade Question

SleeperGT · 10-18-2003, 09:12 AM

I'm looking for input on doing 75 mm throttle body and C & L Intake Plenum upgrade, car is currently Vortech supercharged. My main question is do I run the chance of causing detonation by doing these upgrades? The car has been dyno tuned and is running great right now. After this upgrade is it worth while or a requirement to have it dyno tuned again? I'm not sure how the engine management system works but if I would be feeding more air to the motor with these upgrade, will the MAS pick this fact up and in turn feed more fuel to the motor, or am I reading too much intelligence into how the computer works? Also, any comments about if these upgrades are worth while are appreciated

Thanks!

302man · 10-23-2003, 07:53 PM

I don't think you will make any more boost with a bigger intake. If anything, it should go down. There will be more area to fill before boost is made. The bigger TB will help some. I didn't notice much of a differance when I went from a 65mm tb to a 75mm tb. I think you should be fine with the current setup. If you want to play it safe, add a few lbs of fuel pressure to your car and that should cover you.

ArtMan · 11-14-2003, 09:02 AM

These upgrades are meant to flow more air, so you should check that the additional flow, if any, is matched with a cpable fuel system. Since you have stock heads, you will probably not see a significant increase. What boost level are you running at now?

Are you running an FMU? If you do end up with some detonation then you know its obviously time for a new tune. Are you running a chip now?

10-18-2003, 09:12 AM	#1
SleeperGT Registered Member Join Date: Sep 2002 Location: Ponte Vedra Beach, FL Posts: 122	Throttlebody and Intake Plenum Upgrade Question I'm looking for input on doing 75 mm throttle body and C & L Intake Plenum upgrade, car is currently Vortech supercharged. My main question is do I run the chance of causing detonation by doing these upgrades? The car has been dyno tuned and is running great right now. After this upgrade is it worth while or a requirement to have it dyno tuned again? I'm not sure how the engine management system works but if I would be feeding more air to the motor with these upgrade, will the MAS pick this fact up and in turn feed more fuel to the motor, or am I reading too much intelligence into how the computer works? Also, any comments about if these upgrades are worth while are appreciated Thanks! __________________ '00 GT 5-spd Vortech S-Trim 3.1" Pulley Paxton Air-to-Air Aftercooler 90 mm MAS 42 lb injectors Cobra Fuel Pump 70 mm AccuFab Throttlebody C & L Intake Plenum 2 1/2" X-pipes Anderson PowerPipe MagnaFlow Mufflers Diablo Custom Chip 3.73's Steeda Lower Control Arms 358 rwhp (Mustang Dyno) New Track Times Coming Soon

10-23-2003, 07:53 PM	#2
302man Registered Member Join Date: Jul 1999 Location: INDIANAPOLIS Posts: 404	I don't think you will make any more boost with a bigger intake. If anything, it should go down. There will be more area to fill before boost is made. The bigger TB will help some. I didn't notice much of a differance when I went from a 65mm tb to a 75mm tb. I think you should be fine with the current setup. If you want to play it safe, add a few lbs of fuel pressure to your car and that should cover you. __________________ old S trim combo 10.13@ 135 New YS combo = 680RWHP (no times)

11-14-2003, 09:02 AM	#3
ArtMan Registered Member Join Date: Dec 1998 Location: Scarsdale, NY Posts: 45	more air flow These upgrades are meant to flow more air, so you should check that the additional flow, if any, is matched with a cpable fuel system. Since you have stock heads, you will probably not see a significant increase. What boost level are you running at now? Are you running an FMU? If you do end up with some detonation then you know its obviously time for a new tune. Are you running a chip now?

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