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need to down shift (sanadard) to go up some hilla

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Old 20 Aug 2016, 07:54 pm
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Join Date: Apr 2016
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Post need to down shift (sanadard) to go up some hilla

lately I have been needing to downshift to a lower gear going up some hills, was thinking losing compression been getting great gas mileage between 20 to 30 mpg (2005 turbo) I did go back to using reg gas
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Old 20 Aug 2016, 08:11 pm
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Join Date: Jun 2010
Posts: 252
Talking Re: need to down shift (sanadard) to go up some hilla

Doesn't the turbo require high octane fuel? If the vehicle has a knock sensor, and you use regular gas, the computer would dial everything back to prevent detonation, thereby reducing power.
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Old 21 Aug 2016, 04:59 pm
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Join Date: Jul 2016
Location: Darien, IL | Forest Park, IL
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Default Re: need to down shift (sanadard) to go up some hilla

heat also has a profound effect on power. it's been hot and humid lately and temperature has a very noticeable effect on performance. i hate hot days when my cars feel slow.

read where it starts "there's another fact to consider"

Last edited by rob302; 21 Aug 2016 at 05:05 pm.
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Old 21 Aug 2016, 06:20 pm
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Talking Re: need to down shift (sanadard) to go up some hilla

Turbos are strange beasts. They tend to perform better the hotter they get.

Back in good old 1963, Chevrolet had a compact car called the Corvair which was introduced in 1960 as an economy car, good mileage but no poop. By 1963 Chevrolet wised up and introduced the Corvair Monza Spyder, with a 150 horsepower, turbocharged flat six rear mounted engine. It was discovered that the hotter the air going through the turbo, the faster it would spin.

A trick the performance guys used to do was wrap the exhaust manifolds and pipes with thick insulation, to hold the heat in. The result was a quicker car.

I had a buddy who bought a new Monza turbo and he hammered the snot out of it. The first thing he did was wrap the exhaust system. It was very fast for a small car. We had some good times in it.
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Old 22 Aug 2016, 08:48 am
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Default Re: need to down shift (sanadard) to go up some hilla

Maybe your catalytic converter is getting clogged. Get under it, tap it with a rubber mallet and see if you can hear crap rattling around inside it. And NO, nightwing, the turbos aren't required to have premium fuel, it's just RECOMMENDED.

Aspire to inspire before you expire.
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