supersub

iTrader: (25)

As Some of you may know, I have been pushing the limits of my TVS2300 LSX427. 1/4 mile times, chassis dyno numbers, and real world driving. Kids Still love it! Btw

The bus has been sitting for the most part recently, Due to time restraints and such.
A friend of mine recently had his LS2 dyno'd at a local performance shop and asked if i would be willing to provide my TVS2300 Supercharger along side His TVS2300 for some friendly comparasions.

I said HELL Yes!

We arrived early and ready for some fun! His LS2 already had a TVS2300 installed, ready to ROCK! And Mine on the bench waiting the call.

This Is what we Started with.

Darton sleeved LS2 7.0 with an overdrivin TVS2300, 80# rated injectors and a 3.2 front pulley.
we set up a safe tune and made some pulls.
The best one came in @ 703.8 hp 5000 rpm and 763.1 tq @ 4700 rpm.
Max boost was 12 psi
Chart:


Then I got the call, We removed the blower as an assembly and installed mine. Same TVS2300 But with a Twist MY 1" PHENOLIC SPACER. Same Size injectors 80#, same cog drive, and same pulley 3.2
We Were at the end of the day and the operator was running out of patience So we hammered it out like a nascar pit crew! Like 20 minutes to swap em out!
We made a few Check pulls to look everything over checked for leaks and then we went for it!
1 Pull! Thats all we got! 749.9 hp @ 6000rpm and 771 tq @ 4600 rpm
Max Boost was also 12 psi
It's Not the Peak #'s that get My attention, its whats in the middle that got me!

Chart:

This was as close to an "apples to apples" test we could come up with.

Same tune,same gas,same motor (lol) Same Superchargers Just one with some added plenum volume.
Here Is the graph for the last pull still working on getting the graph for the other pull.


We Learned ALOT at the end of that day! I learned how lucky I am that my combo seems to be paying off, but the one tested unfortunatly fell well short of its expectations.
that However could be a whole new thread!
Enjoy!

The Alchemist

iTrader: (19)

Excuse my ignorance, but what's a phenolic spacer?

Z06PSI

iTrader: (33)

So you are spacing the lower manifold from the upper blower plate? I have been a proponent of this for about 3 years since I got my Kennebell.

supersub

iTrader: (25)

I took this:

And made this:

to achieve this:


And So Far none that i have sold have made less than 700 to the wheels!
SUV,HUMMER,SS TRUCK,2010 Camaro,LS7 vette! Comming soon TBSS!

Z06PSI

iTrader: (33)

That has been a problem on all packaged blowers because of hood clearance. There just isn't enough clearance between the intercooler and the floor to get effective air flow. Who made it for you?

supersub

iTrader: (25)

I made it, the one pictured was one i made for EPP's TVS Hummer build back in Nov 09.

Just a pic i had on file to get my point accross.

S2VYSS

So are you increasing the volume of the blower? Sorry for the stupid question

hellbents10

iTrader: (10)

Pretty cool man, that spacer is getting some work done for sure!!!

Z06PSI

iTrader: (33)

No just the lower manifold plenum volume. Because of packaging they had to slam the intercooler down on the bottom of the plenum floor to keep the height low. This is one reason these blowers (all PD's) are not producing the numbers they should. This also creates heat because of the compression of the air in a very tight space. I am thinking with a spacer like this and some other tricks my setup could be in the 900's.

I would plum two meth spray bars into this phenolic spacer which would be the bees knees.

98BLOWNZ28

iTrader: (10)

without spacer;
4100RPM. 599/468

with spacer;
4100RPM. 706/551

WOW.

JRENIGAR

iTrader: (37)

Hell, Id be happy with the first set of #'s...

Z06PSI

iTrader: (33)

There are three things I am going to try and after that it is TT time.

1. Run the inlet down the passenger side to avoid the alternator on the drivers side. (Going to bandsaw this one and re-weld flipping the TB to the other side.) Could delete the A/C to relocate the alternator but I am not going to do that.
2. Phonelic .75" spacer under the top blower plate. 85.00 in material and a CNC run.
3. Change the belt configuration to wrap the belt completely around the blower pulley. Basically running the belt another way and adding a pulley they already drilled holes for.

S2VYSS

So would a spacer bigger then 1" create more power again, if hood clearance wasn't an issue?

Z06PSI

iTrader: (33)

I would imagine the gains would diminish at a certain point.

S2VYSS

The old more isn't always better. Thanks for the info

supersub

iTrader: (25)

Yes It does create more volume. Cfms and manifold restrictions show it.

There is a point of diminshed return where it starts or ends? I do not know.

Me driving this set-up constantly logging as also shown other positive results. The Iat's Allways returns to a set baseline. no matter how hot it gets. I hot lapped cedar several times, the times got faster(tuning) day got later and the iats allways started @ the same base line.
Never got heatsoaked. The more i ran it the cooler it stayed. Now when i shut it off, It got hot! The spacer started absorbing that heat, literally I watched the temps rise from the bottom up. All I had to do was start it up again let it breathe, and down they went. Temps below the spacer 160's, above it 100. at the inlet 80's thats while running.
Never expected that! Whoo hoo! bonus!

Z06PSI

iTrader: (33)

Put some meth in there and really cool it down.

supersub

iTrader: (25)

ah....... hmmm!

MrJuanderful

Has anyone taken the phenolic spacer idea any further?

Let's just forget about space limitation...does a big phenolic spacer improve IATs? Does the spacer(s) improve turbulence and volumetric efficiency?

When I first saw a photo of those Cathedral blower adapters I wondered why they weren't made of a heat isolating material rather than aluminum.

1FastBrick

iTrader: (16)

The original thread starter now manufactures and sales them with great success. They have proven time and time again to gain additional power.

Look up RDS Blower Plate for more info you will find several threads over various forums about the Phenolic Spacer he manufactures