GT500 Boost Upgrade Questions - Ford Mustang Forum
 
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post #1 of 8 (permalink) Old 06-22-2009 Thread Starter
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GT500 Boost Upgrade Questions

hello everyone, i am wondering how much boost a stock 2007-2009 mustang gt500 puts out stock. If the 2010 numbers are different, i'd also like to know.

Also, how much boost could the engine handle for a DAILY DRIVER completely safe?

I would plan on upgrading the car with a Pulley CAi from steeda Steeda Supercharger Pulley (07-09 GT500) at AmericanMuscle.com - Free Shipping! and then dyno tune it.

I understand that this pulley increases boost by about 3psi and i was wondering if a daily driver could handle that power without a problem??

Thanks!
Joe


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post #2 of 8 (permalink) Old 06-22-2009
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I'm running a 2.6 pulley with a C & L CAI,NGK plugs(cooler heat range) and have been for over a year now(25,000.mi) and it runs great my air charge temp is low and boost max's out at 13psi a good tune is every thing.


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post #3 of 8 (permalink) Old 06-22-2009
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Stock is 5-6 PSI. Adding a 3 psi pulley wouldn't be a problem.

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post #4 of 8 (permalink) Old 06-22-2009
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agreed. until you go over 10 psi you are realitively in the green. Just don't over-rev the engine

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post #5 of 8 (permalink) Old 06-22-2009
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Quote:
Originally Posted by jcvelli View Post
How much boost does a stock '07-'09 GT500 put out? And is the boost any different on the 2010 GT500? I plan on upgrading the car with a pulley that increases boost by about 3 psi.
The factory supercharger on all GT500s makes maximum boost of 9 psi. The GT500KR and 2010 GT500 add an FRPP CAI and upgraded computer program (tune) to get the additional 40hp. Adding a CAI (whether FRPP or C&L or JLT) and tune to an '07-'09 GT500 gets you at least even with the power output of the KR and the 2010 GT500. Changing to a smaller pulley (and adding an idler pulley) and retuning any of them for the 12 psi boost is no problem for the 5.4L motor to handle as long as the tune is good and provides a safe A/F ratio across the entire rpm range.

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post #6 of 8 (permalink) Old 06-24-2009
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Donít forget, your not engaging the SC all the time... or at all if you drive conservatively... but why would you in this car?! I have also noticed that it takes a lot of foot to get the max boost out of the SC. 6 psi is what I normally see.... it takes alot to get the 8.5 psi out of her.

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post #7 of 8 (permalink) Old 06-25-2009
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Gary is right. They usually put out about 8.5 stock. With a 2.6 I seen 12.5 I can daily drive mine and I'm seeing about 21-22 lbs of boost. It's not always being boosted though. Only when you step on it. But then again at 16.00 gal gas for me I don't get into it a whole heck of a lot unless I'm at the track. Even at the boost I'm running it's completely safe. As long as I don't take the RPM's too far all is good. Take it up to about 6700 RPM's a few times though and pop. That'll be the end of the bottom end.

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post #8 of 8 (permalink) Old 08-04-2009
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Quote:
Originally Posted by GT500Girl View Post
Gary is right. They usually put out about 8.5 stock. With a 2.6 I seen 12.5 I can daily drive mine and I'm seeing about 21-22 lbs of boost. It's not always being boosted though. Only when you step on it. But then again at 16.00 gal gas for me I don't get into it a whole heck of a lot unless I'm at the track. Even at the boost I'm running it's completely safe. As long as I don't take the RPM's too far all is good. Take it up to about 6700 RPM's a few times though and pop. That'll be the end of the bottom end.
Dose this apply to the 3PSI increase given by the STEEDA pulley ?
, What about other Upgrades such as the Cooler upgrade is it a must or its only recommended ? and one more Question ... Is it possible to increase the boost with the pulley while keeping the original set up as it is (CAI & Exhaust ) ?

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