5.6# pulley makes 7#'s of boost

[bigike]

5.6# makes 7#'s.

I installed the 7.16# pulley and I almost made 10#'s.

And the needle flutters, thats normal right.

Why is the boost so much higher then advertised?:dontknow:

 

[LoveThisTruck]

5.6# makes 7#'s.

I installed the 7.16# pulley and I almost made 10#'s.

And the needle flutters, thats normal right.

Why is the boost so much higher then advertised?:dontknow:

I've seen mine make 8-9psi on the 5.6# pulley:dontknow:

 

[TNVIPER]

My 5.6 pumped out 7 LBs.......the 10 LB on it now pumps out 9.3 LBs...but may be due to the heads being ported when I went to the 10..

 

[LoveThisTruck]

So with the 10# pulley and stock heads... I'll likely see 12lbs?

 

[ViperTruck2933]

IF your heads are stock and you increase the boost you will see boost creep in the upper rpms. A whole lot of creep is not good. Just a little bit is no big deal.
I have the 10 pound pulley on my car and stock heads. My boost will very slowly creep up to 11 pounds if I wind out the rpms to 6000.

 

[TNVIPER]

So with the 10# pulley and stock heads... I'll likely see 12lbs?

If the pulley is sized correctly you should get 10...

 

[JTS VENOM PERFORMANCE]

changing the pulley without changing the tune could cause some probs, be careful unless your pockets are deep

 

[blackviper]

I have the 10lbs pulley on mine with stock heads and hits 9.8lbs and stays there.

 

[1bad4dr]

Another factor is elevation.

Example: on my old Paxton kit I ran a 2.62 pulley. At Sea Level I ran 12psi. Up here in the Nose Bleed City at 5500' Above Sea Level I only get 10psi with an occassional spike of 11psi...

Lot's things factor in to gain boost.

And as STINKER stated, be sure to retune if you are getting more boost...

 

[JTS VENOM PERFORMANCE]

i wonder if cam selection, headwork , valvetrain , could also have anything to do with the amount of boost?

 

[Bone]

Probably muffler flutter. When's the last time you changed out the bearings?

 

[bigike]

changing the pulley without changing the tune could cause some probs, be careful unless your pockets are deep

LOL no deep ones here.............yet

I put the new 7.16#'er on to see if it tracked the same as the 5.xx did. One WOT pull half way trough second and that was it.

AFR still stayed ultra safe...........METH!

Then I took it off maybe in a year................... No in a year that will be the 10lb'er.

Who wants a 7.16 lb pulley? Donate the money to a Noble cause going on right now.......... Is that clutch paid for yet?

 

[bigike]

I have the 10lbs pulley on mine with stock heads and hits 9.8lbs and stays there.

Maybe this is the ultra super special stuff that 1fast400 had done. Maybe 1fastsblower was a super secret ultra dopeolishous madtabulous blower that makes 2 more #'s per pulley.............. Tony you might have to apologize to mike LOL

 

[Yellow venom]

LOL no deep ones here.............yet

I put the new 7.16#'er on to see if it tracked the same as the 5.xx did. One WOT pull half way trough second and that was it.

AFR still stayed ultra safe...........METH!

Then I took it off maybe in a year................... No in a year that will be the 10lb'er.

Who wants a 7.16 lb pulley? Donate the money to a Noble cause going on right now.......... Is that clutch paid for yet?

How much do you want for the pulley?:rock: