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Old 09-26-2008, 04:05 PM
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Originally Posted by XLR8NSS
I have no idea!!

I ran a 2 bar MAP sensor with the 3.4" and 3.2" pulleys which were 5psi and 6.3psi respectively. I had to remove the 2 bar MAP sensor because of tuning issues with it but, going off of the other two pulleys I'm ***UMING that the 2.8" is around 9psi.
Thats cool man, I was just curious, I couldn't ever go over 7-7.5lbs with my 112. Trying to figure out what my next purchase needs to be.
Old 09-26-2008, 04:11 PM
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On my '05 Silverado SS I was at 7.5lbs with a 3.0" pulley and 112. It also had headers but, that was it.

You could get an overdrive crank pulley, that would get you some more blower rpm.
Old 09-26-2008, 05:17 PM
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Originally Posted by FarmTruc
I think so too, or maybe cooler weather.

final report:


396hp at 6732 RPMS lol!!
Originally Posted by XLR8NSS
6700rpm with the stock valve springs? If so I might turn my shift points up a bit.

I've also noticed slightly less low end torque but, the 1900 does NOT fall off like the 112 did.
h'mm..........mine wasn't happy floating wise around 5600 rpms from what they said...

Originally Posted by XLR8NSS
I have no idea!!

I ran a 2 bar MAP sensor with the 3.4" and 3.2" pulleys which were 5psi and 6.3psi respectively. I had to remove the 2 bar MAP sensor because of tuning issues with it but, going off of the other two pulleys I'm ***UMING that the 2.8" is around 9psi.
My truck has a 2 bar map and the MAF connected but that definetely took some work, my VVT is disabled also, gave some major headaches first round of tuning...
Old 09-26-2008, 05:21 PM
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When should you start worrying about valve float running that many rpms on a stock cam/springs?
Old 09-26-2008, 06:41 PM
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Originally Posted by Y2KLimited
h'mm..........mine wasn't happy floating wise around 5600 rpms from...work, ...

You know I thought that was too much RPM as well, why it makes so much power up top and the engine has no issues with valve float.
So, I verified the RPM pickup on the dyno with hptuners and they very close, off a few rpms, but nothing to post about.

both the TVS Tahoe and this TVS Sub along with the 383 TVS we did, all pulled above 6500rpms with no problem, two of them with stock valves.

I know it's wierd.
Old 09-26-2008, 07:20 PM
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Originally Posted by XLR8NSS
On my '05 Silverado SS I was at 7.5lbs with a 3.0" pulley and 112. It also had headers but, that was it.

You could get an overdrive crank pulley, that would get you some more blower rpm.
I already sold my 112, I just need to take it out of my sig now lol.
Old 09-26-2008, 08:01 PM
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Damn nice!! Can't wait to see the results of a lil bit of VVT tuning on one of these
Old 09-26-2008, 10:48 PM
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Originally Posted by FarmTruc
Ouch, hopefully mine will turn out higher. I actually got more TQ and Power from a heads, cam and headers install. I'll be pretty disappointed if mines not 500rwhp or better with a 2.8 pulley on TVS 1900
Old 09-26-2008, 11:10 PM
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Originally Posted by MNC5
Ouch, hopefully mine will turn out higher. I actually got more TQ and Power from a heads, cam and headers install. I'll be pretty disappointed if mines not 500rwhp or better with a 2.8 pulley on TVS 1900
this was on 5 psi of boost, thats nothing to shake a stick at.
Old 09-27-2008, 11:19 AM
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Originally Posted by MNC5
Ouch, hopefully mine will turn out higher. I actually got more ...TVS 1900

I'm sure it will, all the TVS kits we've done have been impressive.

I'd like to see a 5.3L with some heads, cam and good exhaust make 500hp.
I wonder if 10psi would get it there.

Yours will have to be there!
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