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Firewall VS Floorboard

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Old May 19, 2008 | 12:58 PM
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Firewall VS Floorboard

Hey guys-
What do ya think of this.
Would it be possible to cut out a section of the firewall and modify it to fit a 4" DP w/out a body lift? Is the firewall the same as the floorboard?
What about a Five inch??? ya, ok getting greedy here, but i am going to be modding and towing, and dont want EGT's to be an issue...
I know that the extra half inch or inch wont make that much of a difference, but every little bit helps!
dan
 
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Old May 19, 2008 | 01:13 PM
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It has been done before. I was considering it as well but will take some engineering. 4" should do fine.
 
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Old May 19, 2008 | 01:19 PM
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It would be a waste of time unless you were installing a big turbo.

Bill
 
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Old May 19, 2008 | 02:39 PM
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As big as, say an HX50? That would be when i would attempt this...
What i was thinking is i could get a full exhaust now, and if i move up to a big turbo, then do this...
 
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Old May 19, 2008 | 05:16 PM
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Waste of time.... Fire wall and floor board are two pieces with a pinch weld. You would need to remove the cab or the engine to do it well IMO. Even with an HX50/H2E I would not both with larger than 3 inch DP.
 
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Old May 19, 2008 | 05:21 PM
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Originally Posted by tjbeggs
Even with an HX50/H2E I would not both with larger than 3 inch DP.
Hmmm. Really that little of an effect?
 
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Old May 19, 2008 | 05:30 PM
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I would run water injection before modding the firewall to take a larger down pipe. the larger DP will not affect EGT's enough to offset the work involved.
 
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Old May 19, 2008 | 06:27 PM
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hm, ok. Thanks For the input!
 
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