Maker of twin-turbo kit for Corvette claiming massive (167%) city MPG increase.

[dwtaylorpdx]

In theory it could work, just to offset altitude and keep the engine tuned.
Run a turbo with a electoinic boost control modulated by the AFR?

My 4 cyl jeep would be a candidate, it falls over about 9000 feet.

Just thinking around...

Dave

[pgfpro]

Their HP numbers are very believable. Its happening all the time!!!

I have a good friend that has a trans am on the "the turbo forums" and its in "Car Craft" that made 775whp at 22psi with junk turbos on a junk yard engine with very crappy smog heads etc.
http://www.theturboforums.com/smf/in...?topic=61219.0

The most recent turbo engine I have been working on is a low dollar 351 CI windsor, single BW S476 that made 622whp at 6psi(we stopped there because we ran out of fuel pump). This engine is way less then these guys are running.


Both these cars are now getting better FE then when they were N/A. The benefits of running a turbo are more then just helping with engine pumping losses. I'm not going to get into this now because its basically a book. A well thought out turbo system will improve your performance and FE.

A lot of people on this forum seem to think its a snake oil modification? Its not!!! I personally have over ten cars that I tuned that have gains in performance and FE from a turbo system. In last ten years turbo charger technology has come a long ways. Whats really sad is it not from the OEM automobile manufactures its from the grass roots racer. Now GM and Ford and a few others are waking up and putting turbo cars back in their line up

Whats really sad to me is why aren't the manufactures building an affordable
1.0L turbo diesel and running it in a aero subcompact???
Can you say 150+mpg.

[MetroMPG]

Originally Posted by bhazard

So basically theyre saying I currently drive a 1988 Ford Thunderbird Hybrid?

Yup!

Well, by their definition, any vehicle that combines 2 or more different "technologies" is a hybrid. So everyone gets a prize!

Originally Posted by pgfpro

A lot of people on this forum seem to think its a snake oil modification? Its not!!! I personally have over ten cars that I tuned that have gains in performance and FE from a turbo system.

The difference being: you're not trying to sell us something, so nobody's on your case asking you to "prove it!" by showing some acceptable, reliable & valid data.

The problem with the company in question is that their MPG data, which they're relying on for marketing purposes, is JUNK.

If they want to market MPG, they need to scientifically demonstrate the difference between pre- and post- turbo fuel economy. "Driving around" testing is all they've done to date, according to the company itself, and it doesn't qualify as good data.

[Piwoslaw]

Originally Posted by MetroMPG

Yup!

Well, by their definition, any vehicle that combines 2 or more different "technologies" is a hybrid. So everyone gets a prize!

So, my engine is a diesel (technology #1), has commonrail (#2) and a turbo (#3). It also has an intercooler (#4) and catalyst (#5). Not counting A/C, power steering and a bunch of other stuff, that's at least 5 technologies under one hood. How many more do I need to call my car a hyperhybrid?

[Frank Lee]

We all know turbos can produce huge power.

I was under the impression that since the CARB discription for the system is 6psi max, that it is a 6psi max system.

I don't think those power numbers are representative of a 6 psi boost.

And I REALLY don't think those fe numbers are representative of... anything.

[Drive Stick]

I have noticed that many vehicles that have an aftermarket turbocharger installed end up getting much better mpg off boost.

The new-found torque from the back-pressure of the turbo translates to better throttle response off-boost. If the driver of the vehicle were to be driving a vehicle with cylinder de-activation (most modern V8 engines) essentially they would be driving a 4 cylinder around town and with the proper driving technique it's really not hard to see a significant increase in mpg.

As for claiming 40mpg city, if the remapped ECU or standalone engine management is tuned to run very conservative and lean off-boost you would certainly see an increase, but probably not 40 mpg for the average driver.

By average, I do mean.. typical enthusiast that can't stay off the gas pedal and resist the temptation to hear that v8 exhaust note even in stop and go traffic just for show.

With one of us eco-minded individuals driving the vehicle, we could probably get 40mpg out of it exercising our driving techniques.

Then again, a base model corvette could probably obtain significantly higher gas mileage with one of us behind the wheel anyway, with out spending $10,000 on a twin turbo kit.

[pgfpro]

Originally Posted by MetroMPG

Yup!

Well, by their definition, any vehicle that combines 2 or more different "technologies" is a hybrid. So everyone gets a prize!



The difference being: you're not trying to sell us something, so nobody's on your case asking you to "prove it!" by showing some acceptable, reliable & valid data.

The problem with the company in question is that their MPG data, which they're relying on for marketing purposes, is JUNK.

If they want to market MPG, they need to scientifically demonstrate the difference between pre- and post- turbo fuel economy. "Driving around" testing is all they've done to date, according to the company itself, and it doesn't qualify as good data.

I hear what your saying.

I live fairly close to them and I'm trying to find someone that has had them mod their Corvette. I will let everyone know if I find anything.