87 1 Ton 454 EFI swap to 84 1/2 ton - The 1947 - Present Chevrolet & GMC Truck Message Board Network

03-19-2013, 12:53 AM

rfmaster

Registered User

Join Date: Oct 2003

Location: OC CA

Posts: 1,374

Re: 87 1 Ton 454 EFI swap to 84 1/2 ton

Quote:

Originally Posted by 808486CHEVY

454 TBI has a smog pump on it. Can i do away with it or will that just cause problems?

Yes, you can get rid of AIR pump. ECM only activates vacuum to the AIR pump during cold start to heat up CAT quickly to operating temperature. No tuning is required.

If you change camshaft, exhaust or heads tuning will be required since volumetric efficiency will shift far enough from the factory tune.

//RF

__________________
"The Beast"

1975 Chevrolet C20 longbed
350/700R4! with 3inch body lift
Dual Flowmasters Super 40's!
TBI retrofit completed (2007-07-29)

New 383CID (+030) 08-304-8 9.5:1CR x36,005 (2012-12-17)

Bookmarks

« Previous Thread | Next Thread »

Posting Rules
You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules

Forum Jump

All times are GMT -4. The time now is 10:46 PM.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.