1996 EFI 460 mods, help!
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1996 EFI 460 mods, help!
I just bought a std cab 1996 F350 4x4 with the 460, 5-sp, 3:55 gears, and 61k miles. I have been getting 14.5 mpg on the highway with stock tires at 75mph with the air on using synthetic 10-30W (no b.s).
So far I have only tuned it up (including fuel filter), and said goodbye to the cat (OBDII didn't like that, but you can fool it into thinking the cat is still active).
Now for some questions for the seasoned EFI 460 guys:
On my '89 there where resticive horns in the intake, I don't see any on this '96. This truck is a CA model, does it have them?
I have read on this board that the CA '96-'97's are mass air. How do I tell if this truck is mass air?
If I change the timing set to a pre-72, what should I expect since this is an EFI 460? Will I still see a nice power bump or will the engine simply explode?
Will the mpg go into the toilet or get better?
Any input for mods on this truck greatly appreciated.
So far I have only tuned it up (including fuel filter), and said goodbye to the cat (OBDII didn't like that, but you can fool it into thinking the cat is still active).
Now for some questions for the seasoned EFI 460 guys:
On my '89 there where resticive horns in the intake, I don't see any on this '96. This truck is a CA model, does it have them?
I have read on this board that the CA '96-'97's are mass air. How do I tell if this truck is mass air?
If I change the timing set to a pre-72, what should I expect since this is an EFI 460? Will I still see a nice power bump or will the engine simply explode?
Will the mpg go into the toilet or get better?
Any input for mods on this truck greatly appreciated.
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Joined: May 2001
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From: Billings, MT
1996 EFI 460 mods, help!
If it's mass air it'll have only one intake hose, and there'll be a wiring harness going into that tube near the filter.
I would also recommend throwing that cat back on, as it cleans up something (benzene, maybe?) that is EXTREMELY cancerous. If you're that concerned with back pressure, try running just the cat with no muffler. Many of us here (including me) do that and have noticed increases in power and fuel economy at the expence of a little low-end torque, but you've probably already seen that after the removal of the cat. Also an after market cat can sometimes flow better than a high-perf muffler. Random's cats will out flow just about anything on the market.
The Law
1989 F-250 HD 4x4
460, C6, BW 13-56
Almost Stock
I would also recommend throwing that cat back on, as it cleans up something (benzene, maybe?) that is EXTREMELY cancerous. If you're that concerned with back pressure, try running just the cat with no muffler. Many of us here (including me) do that and have noticed increases in power and fuel economy at the expence of a little low-end torque, but you've probably already seen that after the removal of the cat. Also an after market cat can sometimes flow better than a high-perf muffler. Random's cats will out flow just about anything on the market.
The Law
1989 F-250 HD 4x4
460, C6, BW 13-56
Almost Stock
Laughing Gas
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1996 EFI 460 mods, help!
What do you mean you fooled the computer into thinking the cat wasn't there? Isn't your O2 meter in front of the cat? What did you do with the air pump line that went to the cat?
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1996 EFI 460 mods, help!
[updated:LAST EDITED ON 24-Sep-02 AT 03:14 PM (EST)]I have a '96 CA model, mass air and no air pump. EEC-V (obdII) systems have 2 O2 sensors, one before and one after the cat. If the cat is gone, both sensors read equal and **** off the ECM.
On my '89, I just tapped the air line into the exhaust pipe.
the law has a good point about the cat taking care of benzyne though. After reading his post I did some research and found what he said to be true.
http://webpages.charter.net/belzurkur/96_ford.jpg
On my '89, I just tapped the air line into the exhaust pipe.
the law has a good point about the cat taking care of benzyne though. After reading his post I did some research and found what he said to be true.
http://webpages.charter.net/belzurkur/96_ford.jpg
Senior User
Joined: Mar 2001
Posts: 325
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From: Missoula USA - God Bless
1996 EFI 460 mods, help!
You have good taste. I was wondering if you got my email. is it a 5spd or auto?
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=4039&.jpg
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=474&.jpg
Why Buy new when you can build and tailor it cheaper?
F-350 4x4 ext cab Short Bed Green Monster, it is now Sporting a 300HP 715lb/ft Dyno rated 5.9L 12v Cummins diesel w/ NV4500 5spd and custom NP205 ford T-case w/ rear spicer 1410 yoke, Converted to Sterling 10.5 gears w/3.73 gears using the 41 spline pinion and 1410 U-Joints, Power-Lok equipt Dana 60 front, 33's on 16x8" Outlaw II's. (Used to have)205000 miles, Mass air 460 w/ performance heads and a E40d to 5spd conversion and Doug Thorleys. Old EFI 460 @10 MPG to the 12 V @ 23.2 MPG @ 75 MPH and loving it.
My other toy is a '69 CJ-5 354 Hemi 4 spd 4.88's 32x12.50 MThompsons w/ power-lok 44 rear.
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=4039&.jpg
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=474&.jpg
Why Buy new when you can build and tailor it cheaper?
F-350 4x4 ext cab Short Bed Green Monster, it is now Sporting a 300HP 715lb/ft Dyno rated 5.9L 12v Cummins diesel w/ NV4500 5spd and custom NP205 ford T-case w/ rear spicer 1410 yoke, Converted to Sterling 10.5 gears w/3.73 gears using the 41 spline pinion and 1410 U-Joints, Power-Lok equipt Dana 60 front, 33's on 16x8" Outlaw II's. (Used to have)205000 miles, Mass air 460 w/ performance heads and a E40d to 5spd conversion and Doug Thorleys. Old EFI 460 @10 MPG to the 12 V @ 23.2 MPG @ 75 MPH and loving it.
My other toy is a '69 CJ-5 354 Hemi 4 spd 4.88's 32x12.50 MThompsons w/ power-lok 44 rear.
Senior User
Joined: Mar 2001
Posts: 325
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From: Missoula USA - God Bless
1996 EFI 460 mods, help!
Thank you
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=4039&.jpg
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=474&.jpg
Why Buy new when you can build and tailor it cheaper?
(updated) F-350 4x4 ext cab Short Bed Green Monster, it is now Sporting a 300HP 715lb/ft Dyno rated 5.9L 12v Cummins diesel now w/ NV5600 6 spd and custom NP205 ford T-case w/ rear spicer 1410 yoke, 3.55 gears using the 41 spline pinion and 1410 U-Joints, Power-Lok equipt Dana 60 front and posi rear, 315/75's on 16x8" Outlaw II's. (Used to have)205000 miles, Mass air 460 w/ performance heads and a E40d to 5spd conversion and Doug Thorleys. Old EFI 460 @10 MPG to the 12 V @ 23.2 MPG @ 75 MPH and loving it.
My other toy is a '69 CJ-5 354 Hemi 4 spd 4.88's 32x12.50 MThompsons w/ power-lok 44 rear.
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=4039&.jpg
https://www.ford-trucks.com/user_gallery/displaythumbnail.php?&photoid=474&.jpg
Why Buy new when you can build and tailor it cheaper?
(updated) F-350 4x4 ext cab Short Bed Green Monster, it is now Sporting a 300HP 715lb/ft Dyno rated 5.9L 12v Cummins diesel now w/ NV5600 6 spd and custom NP205 ford T-case w/ rear spicer 1410 yoke, 3.55 gears using the 41 spline pinion and 1410 U-Joints, Power-Lok equipt Dana 60 front and posi rear, 315/75's on 16x8" Outlaw II's. (Used to have)205000 miles, Mass air 460 w/ performance heads and a E40d to 5spd conversion and Doug Thorleys. Old EFI 460 @10 MPG to the 12 V @ 23.2 MPG @ 75 MPH and loving it.
My other toy is a '69 CJ-5 354 Hemi 4 spd 4.88's 32x12.50 MThompsons w/ power-lok 44 rear.
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