ghetto drive pressure set up

[sweetdiesel]

its only temporary

but i rigged up the drive pressure gauge tonight and took it for a spin

the steel line is gpoing to be permanent but the hose and gauge on the mirror is not


this is what i found out my race tune hit 70 psi @ 33 psi boost
it was basically double the whole time useally around the 60psi mark

the worst was @ 10 psi boost it would be @ 40ish hmm

i tried flipping to my DSP tow tune and it was basically the same excepth the top end at 23 psi boost i would be at 40ish BP

to my surprise the SS Tubing wasnt even warm after 30 miutes of hard driving
this is a good thing because now im not so worried about installing the 0-100psi sensor

here is some pics

once i get this done up with the sensor i will do a write up

 

[Diesel Pilot]

Awesome!

play with those vanes and see if you can get any good results.

 

[Kat]

Good Job... But me thinks you have been hanging around Pat too much :rofl: Reminds me of the time he had the boost gauge attached to the windshield wiper

 

[turbo_bu]

Good Job... But me thinks you have been hanging around Pat too much :rofl: Reminds me of the time he had the boost gauge attached to the windshield wiper

No, that is where the fuel pressure gage is supposed to go (at least on the gasser's that I have played with)

 

[robertleeii]

i now this is going to be a stupid question but here we go:

What is Drive Pressure???

 

[JoshH]

i now this is going to be a stupid question but here we go:

What is Drive Pressure???

Exhaust back pressure, pre-turbo. It is what drives the turbine hence drive pressure.

 

[sweetdiesel]

Awesome!

play with those vanes and see if you can get any good results.

yes ill be doing some testing this weekend

first stock tune!
then start adjusting vanehttp://www.autometer.com/cat_accessoriesdetail.aspx?vid=27

this is next to be installed...maybee onto the window wiper:rofl:

 

[Diesel Pilot]

You can laugh at yourself all you want but this is important info your getting. Nobody that I know of has done drive pressure testing on a stock LLY/LBZ turbo yet.

Hopefully, the info you gain will help us get more out of these turbos.

 

[ecc_33]

the "pilot" is right....laugh but this is good useful info!!!.....btw sharp truck got any pics of that hood?

 

[sweetdiesel]

the "pilot" is right....laugh but this is good useful info!!!.....btw sharp truck got any pics of that hood?

he is right and we need this info IMO
this is being done to bennifit all of the VVT clan


the hood is a GM Goodmark 1000 bucks painted and installed and is funtional
does it help? i doubt it

 

[TxChristopher]

You can laugh at yourself all you want but this is important info your getting. Nobody that I know of has done drive pressure testing on a stock LLY/LBZ turbo yet.

Hopefully, the info you gain will help us get more out of these turbos.

We measured drive pressure at PUSU in December 2005

I have a project going that focuses on it.

 

[sweetdiesel]

I have a project going that focuses on it.

:cool2: do tell more

well its now installed in my gauge pod i got the 100psi electric fuel pressure gauge instead of hanging it out the window due to the fact that i only have a spot for 3 gauges in my truck i pulled out my 0-15 fuel gauge that i use for the lift pumps

so today i was driving around in stock format
i think there is more drive pressure from a stock tune than my race tune
max of 60psi but its well over double ALL the time close to tripple quite a bit and just off idle is like 5-7psi hard to tell with such a big gauge
anyways just thought i would let you guys know that im out of the ghetto

one thing i dont like is the braided hose that i used i am going to have to keep a eye on as this may start sawing through wires and brake lines if i dont keep a eye on it i wrapped it in wire loom but i still need to keep a close eye on it i already sawed through my AC line with my fuel gauge line from the filter good thing it was winter

 

[LBZ]

:cool2: do tell more

:yup:

I have a tubing bender I will hook you up with when I get back. It will look a little neater with some nice stainless tubing!

It would be interesting to see #'s with a straight pipe!! Even just drop the muff for a test run.

 

[sweetdiesel]

:yup:

I have a tubing bender I will hook you up with when I get back. It will look a little neater with some nice stainless tubing!

It would be interesting to see #'s with a straight pipe!! Even just drop the muff for a test run.

larry has been telling me to straght pipe forever
fine the muffler is coming off

 

[Diesel Pilot]

I doubt you'll see any drop without a muffler.

I would like to see the LBZ vane tables versus the LLY vane tables drive pressures.

 

[LBZ]

Do the LBZ and LLY run the same turbo??
I would think they would be the same if so.
I am going to install a gauge in my LBZ and monitor this myself and compare with the LLY just for curiosity sake.

 

[Kat]

Do the LBZ and LLY run the same turbo??
I would think they would be the same if so.
I am going to install a gauge in my LBZ and monitor this myself and compare with the LLY just for curiosity sake.

No, the turbo's are different.

 

[WolfLMM]

Not much though. The LBZ should have a little more back pressure. Let us know how it turns out.

 

[sweetdiesel]

I doubt you'll see any drop without a muffler.

I would like to see the LBZ vane tables versus the LLY vane tables drive pressures.

yes and you will

also i installed a 80hp tune in the truck i am addicted to horsepower
and if i drive at 100mph the drive pressure is way lower but i think you guys already knew that

 

[bullfrogjohnson]

if i drive at 100mph the drive pressure is way lower QUOTE]

you damn crazy canadians, there is no where around me i could run a consistant 100mph