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Author Topic: Gen 1 to gen 2 airbox swap  (Read 9321 times)

Offline tyboogie

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Gen 1 to gen 2 airbox swap
« on: December 03, 2015, 11:03:16 AM »
What is needed to swap the gen 2 airbox to run on a gen 1 motor?
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Offline RansomT

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Re: Gen 1 to gen 2 airbox swap
« Reply #1 on: December 03, 2015, 11:14:31 AM »
I tried to adapt a Gen 2 airbox to my nitrous Gen 1 and it doesn't work. The throttle bodies are spaced differently.  If you forced the velocity stack boots to fit, then they crimp up.  I suppose you could cut the box and make an adapter plate, but for what gains?
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Offline tyboogie

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Re: Gen 1 to gen 2 airbox swap
« Reply #2 on: December 03, 2015, 11:40:57 AM »
Saw a post on PB on how to do it. Can't find it now.  It is 10% bigger better airflow basically a factory big air box mod also
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Offline speedduck

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Re: Gen 1 to gen 2 airbox swap
« Reply #3 on: December 03, 2015, 11:48:11 AM »
 I remember measuring the gen2 airbox being smaller, but the clean side is bigger and air filter is positioned better.
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Offline wildphil69

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Re: Gen 1 to gen 2 airbox swap
« Reply #4 on: December 04, 2015, 12:54:39 PM »
The throttle body spacing is different, after you adapted it with an elbow or whatever you wouldnt be gaining anything,
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Offline Busashot

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Re: Gen 1 to gen 2 airbox swap
« Reply #5 on: December 04, 2015, 08:53:21 PM »
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« Last Edit: December 07, 2015, 10:43:54 AM by Busashot »
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Offline tyboogie

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Re: Gen 1 to gen 2 airbox swap
« Reply #6 on: December 05, 2015, 05:03:04 AM »
Quote from: Busashot on December 04, 2015, 08:53:21 PM
Gen II stock stacks adapted to Gen I box.


so how did you do the swap, if you don't mind me asking?
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Offline wildphil69

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Re: Gen 1 to gen 2 airbox swap
« Reply #7 on: December 05, 2015, 07:23:16 AM »
he only swapped the stacks.
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Nitrous is like a hot chick with STD'S...You know you wanna hit it but your just not sure of the consequences.

Offline tyboogie

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Re: Gen 1 to gen 2 airbox swap
« Reply #8 on: December 05, 2015, 02:18:35 PM »
Upon closer examination it appears to be more than just stacks.
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Offline Busashot

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Re: Gen 1 to gen 2 airbox swap
« Reply #9 on: December 05, 2015, 02:19:58 PM »
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« Last Edit: December 07, 2015, 10:44:16 AM by Busashot »
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Offline Busashot

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Re: Gen 1 to gen 2 airbox swap
« Reply #10 on: December 05, 2015, 02:43:40 PM »
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« Last Edit: December 07, 2015, 10:44:30 AM by Busashot »
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Offline Busashot

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Re: Gen 1 to gen 2 airbox swap
« Reply #11 on: December 05, 2015, 02:56:21 PM »
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« Last Edit: December 07, 2015, 10:44:50 AM by Busashot »
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Offline knecum

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Re: Gen 1 to gen 2 airbox swap
« Reply #12 on: December 07, 2015, 07:35:00 AM »
I see a gen1 airbox, the title says to use a gen2 airbox on a gen1 motor..
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Offline fvance

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Re: Gen 1 to gen 2 airbox swap
« Reply #13 on: December 07, 2015, 10:44:19 AM »
You can get VS from John Hartley. They match the id of the throttle bodies, Different lengths are available or he will make whatever length you want. John is a great guy to do business with. He also has a Busa V8 if you want one.
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Offline fvance

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Re: Gen 1 to gen 2 airbox swap
« Reply #14 on: December 07, 2015, 10:50:10 AM »
Oh yeah, the fastest NA bike on pavement, 239+ and the fastest NA 1350  235+, use Gen1 airbox and Hartley velocity stacks. I thing the fastest NA bike, The Guppy 254+ uses Hartley velocity stacks in a Gen 1 airbox.
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Offline TROUBLENC

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Re: Gen 1 to gen 2 airbox swap
« Reply #15 on: January 31, 2016, 03:11:12 PM »
It can be done with big gains throughout the powerband depending on your setup and how airbox is done
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Offline tyboogie

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Re: Gen 1 to gen 2 airbox swap
« Reply #16 on: February 01, 2016, 05:59:10 PM »
Quote from: TROUBLENC on January 31, 2016, 03:11:12 PM
It can be done with big gains throughout the powerband depending on your setup and how airbox is done
Which stacks are those?
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