Why you would NOT upgrade your turbo

05_LLY

05_LLY

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McRat said:
Detorquing is probably the best route to extend the life of the stock rods, but that requires moving up the RPM range. While nitrous can move up the RPM too, the factory charger will not survive long being used at high rpm.
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I credit the detorquing/high rpm power style of tuning to my engine living almost 3 years now with bigger turbo and dual fuelers!

Samdweezel05 said:
My truck bone stock = 17-18mpg hwy
My truck with PPE Hot+2 .E.T = 19-20mpg hwy
My truck with PPE Hot+2 .E.T with HTT Turbo = 22-23mpg hwy.

Just another observation comming from me without the help of a college degree or a spreadsheet.
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Iv seen the same resaults with the gt40 and using efi, but the same deal...what do i know maybe the methane gas I breath every day from the cow shit makes me smarter!!:rofl:
 
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gmduramax

gmduramax

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Jun 12, 2008
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McRat said:
Detorquing is probably the best route to extend the life of the stock rods, but that requires moving up the RPM range. While nitrous can move up the RPM too, the factory charger will not survive long being used at high rpm.
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Is that because of drive pressure?
 
Killerbee

Killerbee

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Samdweezel05 said:
My truck bone stock = 17-18mpg hwy
My truck with PPE Hot+2 .E.T = 19-20mpg hwy
My truck with PPE Hot+2 .E.T with HTT Turbo = 22-23mpg hwy.

Just another observation comming from me without the help of a college degree or a spreadsheet.
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My truck bone stock + my tune=24-26 mpg hwy.

How old are you, maybe it's not too late to fix your mistakes. :)
 
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sweetdiesel

sweetdiesel

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Aug 6, 2006
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Diesel power said:
Also , yea boost is important, but drive pressure is a often over looked demon that will ruin a engine in the blink of an eye.

too much BP and the resulting lack of exhaust will stack on the intake and compression side of the stroke REALLY causeing high CP before TDC and yet again braking parts.

this is why i allways increase the AR or size of the exhaust housing a bit to compensate for higher BP with the use of nitrous, and yes i have seen big Gains in BP with just a 50-75HP shot of the white stuff.....let alone more!!!

But what do i know......im just a guy thats builds golf cart engines......:rofl:
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Do you know how much DP is created from a stock VVT?

If you are changing the AR then your not really talking about a stock turbo anymore , Correct?
 
McRat

McRat

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Aug 2, 2006
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gmduramax said:
Is that because of drive pressure?
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The real problem is the compressor size. By the time you get to 30psi and 3500rpm, you are overspeeding the factory charger. This is what we call going "off the map". Drive pressure skyrockets, EGT's go nuts, and shortly afterwards, the turbo fails. Our chargers will live "off-the-map" way longer than you'd expect though. Some charger blow up quickly, but Garretts tend to survive a lot of abuse.
 
05_LLY

05_LLY

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THe stock vvts are .80AR IIRC right? THats the max AR, vanes open, you can in theory make it smaller by closing the vanes right or am i way off?
 
sweetdiesel

sweetdiesel

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03 D-max said:
pat, what are you considering high DP because i am unsure how far i can push my stock turbo with rpm's
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Ideal would be 1:1 Ive seen 1:3 many many times and coupled with boost pressures upwards of 40 psi

My stock charger has outlasted the motor......Will yours do the same??:dontknow:

Egts sky rocket with high DP....best to just start watching it:)
 
SteveFord

SteveFord

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When you guys talk about dp on the turbo. Couldn't you on the change the vains when using nitrous on the stock vvt as you wouldn't need as much boost to try and burn the fuel?
 
Samdweezel05

Samdweezel05

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Killerbee said:
My truck bone stock + my tune=24-26 mpg hwy.

How old are you, maybe it's not too late to fix your mistakes. :)
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As I don't have any MPG results with my EFI Live and a stock turbo I had to used my PPE as my base. I am old enough to know that being intelligent has nothing to do with your IQ. I can tell you that my current "race" tune is getting about 22mpg around town with some of the driving at 60mph with the cruise set. If you think you can do a tune with 25mpg and still run 600hp on the dyno and low 12's at the track, you let me know.
 
Samdweezel05

Samdweezel05

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Killerbee said:
My truck bone stock + my tune=24-26 mpg hwy.

How old are you, maybe it's not too late to fix your mistakes. :)
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On a side note, is it common practice for you to over think something untill you believe your own babble, and then when proven wrong, change the subject to try and make yourself feal better? Just woundering.;)
 
Stingpuller

Stingpuller

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Jan 11, 2007
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Nos

Is not cheap, is not easy, is not the answer for some. Most say its easy to make power with it. Prove it to me. Some say its the cheapest way, well if you do as Pat did you might find out different. You don't need a big turbo to make big power with NOS. You need a way to get rid of drive pressure. The VVT work very well when you open the vanes and use nitrous. If I would have had the big injectors last your I would have made big power with the cheetah. I just didn't have enough fuel to do anything. Thats why (my guess) it didn't blow up. It takes work to make power with both big charger/twins or nitrous. I can fill a lot of bottles for what some has in the turbo set-ups. Jeff
 
SteveFord

SteveFord

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The VVT work very well when you open the vanes and use nitrous. Jeff[/QUOTE]

Opening the stock vanes while spraying is what I was thinking would work. Just finding out the right setting to the amount your spraying is the key to keep everything in check.
 
Stingpuller

Stingpuller

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VVT with NOS

Its really easy! You just put your boost about 30 psi. and let the computer do its thing. You don't need big boost with spray. My thoughts are thats how most burn there stuff down is by not backing it down. Let the nitrous do it's work no need for high boost. I would bet Jess could enlighten everyone with a stock charger and nos. It can be done and work well. Jeff
 
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