522 ci TT

vette2viper

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Hey all... for any of you with a built TT... do you all have a lumpy, mean idle? This sound is music to my ears!!! However, I have heard a few TT cars that were as docile as grandma's 4 door sedan. I prefer the non-sleeper, in your face idle. Just curious if UGR built all his 522s with a healthy cam. I am looking at a very mild and safe rwhp of 823 and rwtq of 975 on water/**** at 12 psi boost.

Thanks...
 

dester243

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Mine sounds pretty mild. Little lumpy but its a rsi build and not a ugr build. I could do a sound clip
 

Nine Ball

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Two technical reasons fight having a "lopey" sound, when talking about twin turbo setups.

1. The turbos themselves act as mufflers, since the exhaust note has to pass through the turbine. This alters the sound waves, a lot.
2. Lopey cams are typically associated with a higher overlap cam profile (low lobe separation angle), which isn't really suited for a boosted application. That excessive overlap bleeds off boost. Better for NA setups and high rpm.
 

vette2viper

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Idle is not that lumpy...just mean sounding. On TT 522 engines with mild tune and 12psi boost, does 823/975 for rwhp/rwtq sound in the ball park? I am not used to seeing torque so much higher than hp. this was on a mustang dyno. do they measure about as good as the regular ones?
 

EdwardETraylorIII

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NineBall nailed it...

On your last questions (post before this one) - Those numbers sound pretty low for 12 PSI on a 522. I make over 900 RWHP on only 9 PSI (but I am E85) and only only have 512 CI.

Quite frankly, there is no reason you shouldn't be making 1100+ reliably and safely with that setup (a forged 522).

To further underscore what NineBall said, you just don't need a gnarly cam to make big power... Just .600+ lift (which doesn't effect how the exhaust note sounds) is really all you need.
 

vette2viper

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NineBall nailed it...

On your last questions (post before this one) - Those numbers sound pretty low for 12 PSI on a 522. I make over 900 RWHP on only 9 PSI (but I am E85) and only only have 512 CI.

Quite frankly, there is no reason you shouldn't be making 1100+ reliably and safely with that setup (a forged 522).

To further underscore what NineBall said, you just don't need a gnarly cam to make big power... Just .600+ lift (which doesn't effect how the exhaust note sounds) is really all you need.
Wow...seems I am running on the low end. Was told by mustang dynamic person that this tune has very little timing dialed in. Thanks for your input.
 
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