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Old 12-28-2013, 10:42 PM   #1
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Gas Mileage 01 GT

Hey guys,

I'm you get this question a lot, but I want to know if this is normal.
I have a 2001 GT with a twin screw kenne bell blower on it. (No idea what size). Dealer also told me it has 4:10 gears. It has the flows cat back but the rest of the exhaust is stock. A 70mm bbk throttle body and a CAI. That's about all I know of done to it. I'm usually getting about 9mpg if I do all in town driving. But I've taken it to the beach and stuff and I'm barely getting 250 miles to a tank. Is this usual for a blower and 4:10? My tach is around 2700 at 75mph.
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Old 12-28-2013, 10:46 PM   #2
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I have 410s and get anywhere from 19mpg- 23 mpg mixed ,


Maybe needs a tune up, or better tune
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Old 12-28-2013, 10:48 PM   #3
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I have 410s and get anywhere from 19mpg- 23 mpg mixed ,


Maybe needs a tune up, or better tune
True, I forgot to mention mine is an automatic.
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Old 12-28-2013, 10:54 PM   #4
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Plus can anyone tell me the size of this kenne bell
Kit?
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Old 12-28-2013, 11:31 PM   #5
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Looks like a 2.1l
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Old 12-28-2013, 11:33 PM   #6
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Looks like a 2.1l

Thanks, it's intercooled right? I think it is due to the black reservoir to the right of the CAI.
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Old 12-28-2013, 11:35 PM   #7
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Yes it very much looks so. I'd say a 2.1 imtercooled kenne bell. You buy the car with it already on it??
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Old 12-28-2013, 11:40 PM   #8
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Yes it very much looks so. I'd say a 2.1 imtercooled kenne bell. You buy the car with it already on it??
Yes sir got a deal on eBay on it actually. Gave 8k for the car. It had everything alreAdy done to it, 99/100 paint job, 10/10 interior and 75k miles. Only problem is, I have no idea what exactly is done to it. Except for the stuff I can clearly tell.
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Old 12-28-2013, 11:43 PM   #9
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Hmmm oh ok I see well seems like a great car and got a great supercharger! In all honesty only way to tell if it's forged and got the capabilities to handle a lot of hp is to year the motor open. Also I'd get a dyno tune done on the car that way you know the tune is in order and might help with fuel economy and I'd step down form the 4.10s to at least 3.73 or even a 3.55 gear just to save more mpg. Might as well check to see if the previous owner put a 31 spline setup in the rear an if not I'd get all that with the gears and be done all at one time
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Old 12-28-2013, 11:47 PM   #10
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Hmmm oh ok I see well seems like a great car and got a great supercharger! In all honesty only way to tell if it's forged and got the capabilities to handle a lot of hp is to year the motor open. Also I'd get a dyno tune done on the car that way you know the tune is in order and might help with fuel economy and I'd step down form the 4.10s to at least 3.73 or even a 3.55 gear just to save more mpg. Might as well check to see if the previous owner put a 31 spline setup in the rear an if not I'd get all that with the gears and be done all at one time
I didn't understand the first part, what do you mean by "year the motor open?"
I'm def probably stepping down to 3.55 just to save some money because 4.10 are just not needed with the blower setup. Ill def check into the 31 spline setup man, I doubt it's been done honestly.
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Old 12-28-2013, 11:49 PM   #11
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Sorry stupid iPhone, what I mean is to tear open the motor, like going the engine and making sure that forged internals were installed for your bottom end. (Forged pistons, Connecting rods, crankshaft) while doing this isn't nessecary just keep in mind that if you do have stock internals they have a limit of around the 400 hp area and are a time bomb on a car with a radical or non conservative tune.
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Old 12-28-2013, 11:54 PM   #12
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Sorry stupid iPhone, what I mean is to tear open the motor, like going the engine and making sure that forged internals were installed for your bottom end. (Forged pistons, Connecting rods, crankshaft) while doing this isn't nessecary just keep in mind that if you do have stock internals they have a limit of around the 400 hp area and are a time bomb on a car with a radical or non conservative tune.
That's what I've been worried about. I haven't done anything to the car bec I'm
Scared that it still has stock internals.. I personally don't want to tear Into the motor. And I can't ask the previous owner because the dealer won't tell me and doesn't have the dudes info anymore. What do you think this car is putting down right now? I would say it's pretty close to 400RWHP if not more. And I may be wrong but to have 4.10 don't you have to have the 31 spline? Or am I wrong.
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Old 12-28-2013, 11:57 PM   #13
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No you can have 4.10s in a stock 28 spline set up, and to each his own man. I completely understand on not wanting to tear into the motor but it's kind of a crap shoot, you can hit it and hope for the best. But not knowing any other mods on the car I'd say anywhere in the range of 350-400 would be about right, like I said the dyno tune would be the best option because it would be able to tell you exactly how much power you are making and what's going on in your engine but it will not tell you if you have forged internals or stock internals.
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Old 12-29-2013, 01:51 PM   #14
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Would it be possible to just take off the oil pan and check the internals? If so while you were there you could clean out to oil pan and install a better oil pump.
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Old 12-29-2013, 02:30 PM   #15
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Yeah you could drop the pan and take a look. Just make sure you know what you're looking at to know what stock parts look like vs. Aftermarket. And you don't really need to change the oil pump out, the stocker is pretty good even for mildly built cars, unless your pressure is dropping.
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Old 12-29-2013, 03:21 PM   #16
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+1 on these you can drop the oil pan, replace the gasket while your doing that and it's not absolutely necessary to change out the pump but if you go the money you might as well while your in there. Upgrading is never a bad idea
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Old 01-07-2014, 04:34 PM   #17
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Wtf 4.10 with a KB? Aren't you spinning tires everywhere you go? I have an 04 auto gt with 4.10 and my mpg went waaay down with that alone, even after the full tune up. Lucky you . Also, even if you blow your motor and have to rebuild it (forged), you got your car cheap enough that's its still worth it lol

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Old 01-10-2014, 10:09 AM   #18
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I've got a Kenne Bell 2.1L. Put down 425rwhp 447rwtq and has stock internals. I also have 373s and I get around 15mpg city. Haven't had it on a trip yet. I've read the motor can handle up to 450hp. I would definitely get it on a dyno to find out where you stand. Sounds like you got a great deal on the car. Good luck with it.
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Old 01-10-2014, 11:24 AM   #19
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I'd go get a nice aftermarket stall converter, J-mod that trans (look up "J-mod tccoa" on youtube) and put 3.55s or even lower in that thing especially if you are worried about mileage. 2700rpm on the highway is going to burn through fuel very quickly if you do a lot of highway.

Personally I would think twice about a blower car espeically from a dealer. Screams "money pit".
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