How much boost should I be seeing?

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Nov 6, 2013 | 07:57 AM

Tirefire

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From: El Paso, Tx

How much boost should I be seeing?

AES 390, ATI IC, F1A w/3.90 pulley tfs 220 and ls6 intake, tuner saw 15 lbs @ 5800 rpms with truck hat. I then switched it with my regular f-body hat and dropped to 13 lbs at 6900 rpms. My belt wasnt aligned right before when my tuner saw 15 lbs. Now that everything looks aligned its only giving me 13 lbs. Is this because of the hats I changed up or is this the norm? DA 6500. Any help appreciated.

Last edited by Tirefire; Nov 6, 2013 at 08:12 AM.

Nov 6, 2013 | 08:37 PM

jjcamaro02

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From: buffalo,NY

You should be around 20# with the truck hat. Why did you switch the filter hats?
What intercooler are you running?

Nov 6, 2013 | 09:24 PM

sbcgenII

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From: Fort hood

Smaller intakes are going to limit your boost plus you are only revving to 5800. The belt "looks" aligned now or is? What does the boost curve look like?

Nov 7, 2013 | 12:24 AM

Tirefire

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From: El Paso, Tx

Quote:

Originally Posted by jjcamaro02

You should be around 20# with the truck hat. Why did you switch the filter hats?
What intercooler are you running?

I changed it because when I got the car back it was falling off ever time i drove onto my driveway. I wsa kind of scared it would damage the impeller. Thats why I switched.

Nov 7, 2013 | 12:28 AM

Tirefire

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Quote:

Originally Posted by sbcgenII

Smaller intakes are going to limit your boost plus you are only revving to 5800. The belt "looks" aligned now or is? What does the boost curve look like?

The 5800 was the the higest rpm the tuner saw before the belt walked off the pulley. Its been fixed since then. The boost curve is gradual it kind of flattens out 13# @ 6900 rpm. Would a slipping clutch be the cause of this?

Nov 7, 2013 | 06:28 AM

35thsscamaro02

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From: saint louis Missouri

It should still see boost with slipping clutch. Seems like a inlet hat and possibly a intercooler restriction

Nov 8, 2013 | 06:46 AM

Monte4ever

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I think you should be seeing around 16-18 psi with good flowing heads and exhaust.

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Nov 8, 2013 | 07:30 AM

jjcamaro02

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From: buffalo,NY

Quote:

Originally Posted by Tirefire

I changed it because when I got the car back it was falling off ever time i drove onto my driveway. I wsa kind of scared it would damage the impeller. Thats why I switched.

I had the same problem. Cut the raised lip off so you have a flat surface area. Never had a problem after that.