Boost issues or longtubes doing their job....tuner jinxed me and it grenaded

[GoatSlayer]

I had issues with my whipple 2.9 and decided to send it back to whipple to be checked out, making grinding noise. So in the mean time, i slapped my stock eaton with a 2.76 upper only.
The boost will remain at #13.4lbs until 4000rmps then after 4000rmps the boost drop to 11lbs. The car made 454rwhp at 6300rpms and 455tq.

So do i have boost issues or thats just the boost drop due to the longtubes(1 5/8)?

When i was leaving, the tuner told i need to change my idler for an aftermarket one because at some point the stock ones usually explode. Earlier today i did a 2nd gear WOT and i heard a loud snap. Popped the hood and the blower belt was just sitting there....:nonono::nonono:

 

[moot09]

Wow, my car was having basically the exact same problem. It would peak around 13lbs @ 4500 and drop to around 11.5-10 after wards. I dont have LTs though.

What I might suggest doing is double checking the blower gasket. It's metal so there might be a chance it was bent during the installation of your Eaton. This wasn't the case with mine however, it was just loss of compression Lol. Hope this helps...

 

[earico]

It's the long tubes. Mine does the same. My pulley combo nets the same as yours.

I've raced others with a 2.76 and stock headers and pulled on them.

 

[mach1033]

So which idlers are you gonna go with? Metco, billetflow or the new division X?

 

[Blueline]

This is off the whipple site:

Feature of Whipple:

No "boost drop off" (stock Eaton is 13 psi @ 4000 and only 10.5 psi @ 6000).

 

[1320 Junkie]

i had 2 blow up on me so i feel your pain...i have a F150 truck idler in the lower position now...so far so good.

 

[black 10th vert]

This is off the whipple site:

Feature of Whipple:

No "boost drop off" (stock Eaton is 13 psi @ 4000 and only 10.5 psi @ 6000).

You can have the same "no boost drop off" with a ported Eaton. My stage 5 setup had 0 boost drop all the way to red line. It would hit 17 psi very quickly, then hold it rock solid.

i had 2 blow up on me so i feel your pain...i have a F150 truck idler in the lower position now...so far so good.

Why in the world would you bother to install a 3rd stock style idler after blowing 2 up? Just the risk of being broken down on the road somewhere would more than justify dropping $80, or so for a quality billet replacement - especially with the money you obviously have in mods already.:??:

 

[DSGWhippedSnake]

It's the typical eaton boost bypass...it can be adjusted/modified to eliminate boost drop off at high rpm's. My car does the same thing, I don't have LT's.

here:

http://www.svtperformance.com/forum...-boost-drop-off-eliminate-boost-solenoid.html

 

[black 10th vert]

It's the typical eaton boost bypass...it can be adjusted/modified to eliminate boost drop off at high rpm's. My car does the same thing, I don't have LT's.

here:

http://www.svtperformance.com/forum...-boost-drop-off-eliminate-boost-solenoid.html

Now that you mention it, I did have that mod done already when I did the stage 5 setup, so I'm not positive whether it was that mod, or the port that made the difference, but whatever it was, worked. I had honestly forgot about that boost solenoid bypass, thanks for bringing that up.:beer:

 

[TerminatorSVT03]

All non ported eaton blowers have boost drop off simply because there just not that efficient superchargers at higher Rpm's unless ported!

 

[1320 Junkie]

You can have the same "no boost drop off" with a ported Eaton. My stage 5 setup had 0 boost drop all the way to red line. It would hit 17 psi very quickly, then hold it rock solid.



Why in the world would you bother to install a 3rd stock style idler after blowing 2 up? Just the risk of being broken down on the road somewhere would more than justify dropping $80, or so for a quality billet replacement - especially with the money you obviously have in mods already.:??:

Thats all i could get on a sunday in a different state from a dealer....lol.

 

[black 10th vert]

Thats all i could get on a sunday in a different state from a dealer....lol.

Gotcha.;-) I would probably try to pick up a BF, or Metco to replace that before it lets go with the power you are running, though! I have a dual bearing 100mm Metco for sale if you're interested.;-)

 

[GoatSlayer]

So which idlers are you gonna go with? Metco, billetflow or the new division X?

Will be going with Metco:beer:

All non ported eaton blowers have boost drop off simply because there just not that efficient superchargers at higher Rpm's unless ported!

Cant wait to get my whipple back:beer: