Larger throttle body
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Joined: Mar 2003
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Larger throttle body
I hear there's a way to "custom" fabricate the K&N FIPK system? Is it worth it or should I find a larger throttle body and hoses?
Where do I find a throttle body and what size am I looking for?
Thanks
Where do I find a throttle body and what size am I looking for?
Thanks
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Joined: Oct 2002
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From: MA
Larger throttle body
http://performanceunlimited.com/projectmpg/ That should give you some insight on the whole FIPK dillema. As for a bigger throttle body, you want more power? Realize that with a bigger throttle body, you will also consume more gas.
Rich
Rich
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Joined: Mar 2003
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From: Medford, OR
Larger throttle body
I know a few people who have just taken an open K&N Filter and some PVC pipe and made their own FIPK. You just have to find something to mount it to so it isn;t bouncing around. It sounds pretty cool, but from that Project MPG page it sounds like it may not be the best solution.
Tuned
Joined: Mar 2002
Posts: 250
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From: Grants Pass, OR
Larger throttle body
You can do a search for homeade FIPK. Somebody around here made one.
When you click on the link to project MPG they show the larger throttle body that they used on the 460 motor.
This was the quote for its effectiveness "After testing with this upgrade Mileage was not affected, however, The absence of water needed to run through the throttle body (like OEM) also decreased the octane requirement of the fuel therefore dramatically reducing fuel cost per mile in that sense... saving the equivalent of 6% fuel savings per mile. Power was significantly increased by 22 hp and 31 ft lbs of toque and the throttle response was very notably improved"
I don't know if you would have the same or similar results with a 302 or 351.
When you click on the link to project MPG they show the larger throttle body that they used on the 460 motor.
This was the quote for its effectiveness "After testing with this upgrade Mileage was not affected, however, The absence of water needed to run through the throttle body (like OEM) also decreased the octane requirement of the fuel therefore dramatically reducing fuel cost per mile in that sense... saving the equivalent of 6% fuel savings per mile. Power was significantly increased by 22 hp and 31 ft lbs of toque and the throttle response was very notably improved"
I don't know if you would have the same or similar results with a 302 or 351.
Lead Driver
Joined: Sep 2002
Posts: 9,182
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From: Gateway to the West
Larger throttle body
If you opt for the throttle body, Edelbrock/BBK is the only one I know of. There are two sizes: twin 56mm and twin 61mm. The twin 61mm requires port matching to the upper intake plenum. About $320 at proficient performance for the twin 56mm. Not sure on the 61mm.
Senior User
Joined: Jul 2002
Posts: 267
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From: Everett, WA
Larger throttle body
I made one of my own using stock parts - there's a picture of it and a description of it in my gallery.
I've got a couple of ideas re: relocating it for more cold air, etc.
Mileage - don't think it really helped. Throttle response seems a little better, but that might just be the way it sounds when you nail it
just my 2 cents....
msautry
I've got a couple of ideas re: relocating it for more cold air, etc.
Mileage - don't think it really helped. Throttle response seems a little better, but that might just be the way it sounds when you nail it
just my 2 cents....
msautry
Mountain Pass
Joined: Jan 2003
Posts: 226
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Larger throttle body
I read somewhere that going to a larger bore throttle body will decrease your low end torque
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Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
Larger throttle body
Just a humble opinion but, I would think that as long as the intake and exhaust systems could handle close to the same amount of air flow through them, you should see an increase in power across the entire rpm range. The "power band" is determined more by the cam setup is it not? "When" the valves open and close and "how long" they stay that way during the cycle does more for "where" the torque gains are seen.
Now, pulling more air through the system will require greater amounts of fuel to keep the mixture optimal as I understand it.
Now, pulling more air through the system will require greater amounts of fuel to keep the mixture optimal as I understand it.
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Mountain Pass
Joined: Jan 2003
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Larger throttle body
Like I said, it was something I read. Wish I could remember where.
It was most likely referring to changing to a larger throttle body without other upgrades, but without rereading it I'm just guessing.
Brian
It was most likely referring to changing to a larger throttle body without other upgrades, but without rereading it I'm just guessing.
Brian
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