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TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.

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Old 10-30-2009, 02:06 AM   #1
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maf to speed density

i have a 355 currently with world product heads, voodoo cam and built tpi set up. im swaping with a zz409 and afr 195s. will swapping to speed density be benificial to me. i really dont know the difference can you guys compare the two and give me some advice please
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Old 10-30-2009, 10:57 AM   #2
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Re: maf to speed density

the mas system measures the amount of air coming into the engine, among other things, and makes adjustments accordingly.
The speed density system measures manifold vaccuum in stead of incoming air.

The engine will perform about the same reguardless of which system you put on it, personnally, I'd stay with the mas system, it's easier to tune and more forgiving of mods.
you probably will need a custom chip as well
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Old 10-30-2009, 07:20 PM   #3
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Re: maf to speed density

Quote:
Originally Posted by John 89 Formula View Post
it's easier to tune and more forgiving of mods.
you probably will need a custom chip as well

Guys out there running 10 sec 434's on stock MAF with correct tuning
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Old 10-30-2009, 07:20 PM
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