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Author Topic: 4.0 throttle body on a 2.5 throttle body spacer?  (Read 1731 times)

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Offline lax22

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4.0 throttle body on a 2.5 throttle body spacer?
« on: July 15, 2007, 04:11:11 PM »
Hey there
I have a 2.5l throttle body spacer on my jeep right now and wanted to upgrade to the 4.0 throttle body. My question is would i have to buy a 4.0 Throttle body spacer or would the 2.5 one work? Thanks in advance. ;)

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tJ54

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Re: 4.0 throttle body on a 2.5 throttle body spacer?
« Reply #1 on: July 15, 2007, 05:44:13 PM »
The 2.5 one will work fine with the 4L Throttle body
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Offline lax22

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Re: 4.0 throttle body on a 2.5 throttle body spacer?
« Reply #2 on: July 15, 2007, 07:57:54 PM »
Yeah i was just curious as to weather the bore on the 2.5l tbs was smaller than the bore on the 4.0l tbs. If thats the case i might try and spring for one of those instead when i do the swap otherwise if it will work that will be perfect and save me some cash in the process.
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Offline Bounty Hunter

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Re: 4.0 throttle body on a 2.5 throttle body spacer?
« Reply #3 on: July 21, 2007, 05:43:00 AM »
Measure them when it is off, hone the spacer out if it is too narrow.
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Offline Jeffy

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Re: 4.0 throttle body on a 2.5 throttle body spacer?
« Reply #4 on: July 21, 2007, 11:41:48 AM »
I'd jsut buy the 4.0L one if you're planning on doing the 4.0L TB.  Honing from 42mm to 55mm would be a pain.  Not to mention the $35 spacers on ebay are usually once size fits all.
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Oilsmoke

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Re: 4.0 throttle body on a 2.5 throttle body spacer?
« Reply #5 on: July 21, 2007, 06:34:52 PM »
If it's Smaller than boreing it to fit is the best way for making power increases. Even if it takes some time. A spacer that is one size fits all Is just snake oil. :stupid:

Edges & lips Kill cfm flow and The whole point of add HP increaseing Mods is to Make it the BEST YOU CAN.
A sanding drum on a die grinder and Some music,a few cold ones :beer:, make for a good  weekend night out in the shop.
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Offline Jeffy

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Re: 4.0 throttle body on a 2.5 throttle body spacer?
« Reply #6 on: July 21, 2007, 08:39:16 PM »
Quote from: Oilsmoke on July 21, 2007, 06:34:52 PM
If it's Smaller than boreing it to fit is the best way for making power increases. Even if it takes some time. A spacer that is one size fits all Is just snake oil. :stupid:

Edges & lips Kill cfm flow and The whole point of add HP increaseing Mods is to Make it the BEST YOU CAN.
A sanding drum on a die grinder and Some music,a few cold ones :beer:, make for a good  weekend night out in the shop.

The spacers that are one size fits all are 55mm bore (ie. 4.0L)...
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"If the motor car were invented today, there is absolutely no way that any government in the world would let normal members of the public drive one."

Offline lax22

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Re: 4.0 throttle body on a 2.5 throttle body spacer?
« Reply #7 on: July 22, 2007, 06:38:40 PM »
Thanks for the responses guys, so if i am going to go with he 4.0l throttle body i am going to have to start looking for a 4.0 throttle body spacer.
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Jesse-James

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Re: 4.0 throttle body on a 2.5 throttle body spacer?
« Reply #8 on: July 24, 2007, 01:42:31 AM »
This is the one I got. Good price, no problems.
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