305 to 350 and pass california smog in 1985 camaro z28 - Third Generation F-Body Message Boards


Go Back   Third Generation F-Body Message Boards > Tech Boards > Engine Swap
Search

Engine Swap Everything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.

305 to 350 and pass california smog in 1985 camaro z28

Reply
 
Thread Tools Search this Thread
Old 03-11-2009, 11:10 PM   #1
Junior Member
 
Join Date: Nov 2008
Posts: 5
Car: 1985 chevy camaro z28
Engine: 305
Transmission: 700r4

305 to 350 and pass california smog in 1985 camaro z28

I was thinking about switching from a 305 carb motor to 350 carb motor cause my camaro is putting out black and blue smoke out of the exhuast and i'm wondering if its worth rebuilding the 305or getting a 350 motor instead and will it still pass california smog because the 350 motor was not offered in 1985. also what years should i be looking for when looking for 350 motor.
mrwebb40 is offline vBGarage Page   Reply With Quote
Old 03-12-2009, 12:43 AM   #2
Moderator
iTrader: (14)
 
five7kid's Avatar
 
Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 42,715
Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89


A 350 was offered in '85 full size cars like Caprice. So, it would be legal.

But, you most likely still have a problem with the stuff you'd be putting right back on a rebuilt or replacement engine. Find out why it's running rich. Could be something as simple as the O2 sensor. Is the SES light coming on?
five7kid is offline vBGarage Page   Reply With Quote
Old 03-28-2010, 08:27 PM   #3
Senior Member
 
KNBlazer's Avatar
 
Join Date: Feb 2010
Location: San Diego, California
Posts: 1,125
Car: Trailblazer EXT 4.2 (Firebird Form)
Engine: 5.1 4bbl
Transmission: 700R4 Mega Raptor Level 4
Axle/Gears: 2.73

Re: 305 to 350 and pass california smog in 1985 camaro z28

it doesn't matter if a 350 wasn't offered on an Fbody in 85, what you would need to do if you do get a 350, is transfer all emissions stuff, computer, exhaust setup, basically everything that is plugged to a connector on the ECM harness from a 350 F-Body... it needs to be setup exactly how it's setup from factory...
KNBlazer is offline vBGarage Page   Reply With Quote
Old 03-28-2010, 10:26 PM   #4
Moderator
iTrader: (14)
 
five7kid's Avatar
 
Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 42,715
Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89


But, that isn't what he did, so what I said is still true.
five7kid is offline vBGarage Page   Reply With Quote
Old 03-28-2010, 10:29 PM   #5
Senior Member
 
KNBlazer's Avatar
 
Join Date: Feb 2010
Location: San Diego, California
Posts: 1,125
Car: Trailblazer EXT 4.2 (Firebird Form)
Engine: 5.1 4bbl
Transmission: 700R4 Mega Raptor Level 4
Axle/Gears: 2.73

Re: 305 to 350 and pass california smog in 1985 camaro z28

Quote:
Originally Posted by five7kid View Post
But, that isn't what he did, so what I said is still true.
he hasn't done anything though... has he? He said he's thinking about it... so the only he can put in a 350 is by switching over to TPI...
KNBlazer is offline vBGarage Page   Reply With Quote
Old 03-28-2010, 11:21 PM   #6
Member
iTrader: (12)
 
Join Date: Sep 2009
Location: Norwalk, CA
Posts: 452
Car: 1983 Z-28
Engine: 5.7 L
Transmission: T-5

Re: 305 to 350 and pass california smog in 1985 camaro z28

Quote:
Originally Posted by KNBlazer View Post
it doesn't matter if a 350 wasn't offered on an Fbody in 85, what you would need to do if you do get a 350, is transfer all emissions stuff, computer, exhaust setup, basically everything that is plugged to a connector on the ECM harness from a 350 F-Body... it needs to be setup exactly how it's setup from factory...
this is some what true...i have a 83 camaro with a 350 with 305 heads that came out of a truck that just passed smog in California...
83C_CamAroZ28 is offline vBGarage Page   Reply With Quote
Old 03-29-2010, 02:41 PM   #7
Moderator
iTrader: (14)
 
five7kid's Avatar
 
Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 42,715
Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89


Quote:
Originally Posted by KNBlazer View Post
he hasn't done anything though... has he? He said he's thinking about it... so the only he can put in a 350 is by switching over to TPI...
All 3rd gen f-body 350's had TPI. That doesn't mean you have to put TPI on if you swap to a 350 if your chassis isn't newer than the last certified carb'd 350 passenger car.
five7kid is offline vBGarage Page   Reply With Quote
Old 03-29-2010, 02:50 PM   #8
Senior Member
 
KNBlazer's Avatar
 
Join Date: Feb 2010
Location: San Diego, California
Posts: 1,125
Car: Trailblazer EXT 4.2 (Firebird Form)
Engine: 5.1 4bbl
Transmission: 700R4 Mega Raptor Level 4
Axle/Gears: 2.73

Re: 305 to 350 and pass california smog in 1985 camaro z28

Quote:
Originally Posted by five7kid View Post
All 3rd gen f-body 350's had TPI. That doesn't mean you have to put TPI on if you swap to a 350 if your chassis isn't newer than the last certified carb'd 350 passenger car.
He needs it to pass California Emissions... if he puts in a 350 without TPI, I think he'll end up opening up a can of worms...
KNBlazer is offline vBGarage Page   Reply With Quote
Old 03-29-2010, 03:19 PM   #9
Moderator
iTrader: (14)
 
five7kid's Avatar
 
Join Date: Mar 2000
Location: Littleton, CO USA
Posts: 42,715
Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89


Actually, putting a 350 TPI in it would kick off the "motor change" can-of-worms process. Whereas putting a carb'd 350 in might not even get noticed.

Technically, both would need to go through the "motor change" process.
five7kid is offline vBGarage Page   Reply With Quote
Old 03-29-2010, 03:36 PM   #10
Senior Member
 
KNBlazer's Avatar
 
Join Date: Feb 2010
Location: San Diego, California
Posts: 1,125
Car: Trailblazer EXT 4.2 (Firebird Form)
Engine: 5.1 4bbl
Transmission: 700R4 Mega Raptor Level 4
Axle/Gears: 2.73

Re: 305 to 350 and pass california smog in 1985 camaro z28

Quote:
Originally Posted by five7kid View Post
Actually, putting a 350 TPI in it would kick off the "motor change" can-of-worms process. Whereas putting a carb'd 350 in might not even get noticed.

Technically, both would need to go through the "motor change" process.
Yep... it all depends where you take it to get smogged... some places don't have a clue, but other places they have competent people that know what to look for... and yeah you may be right that just doing a swap would probably get him by, he would just need to get it tuned elsewhere on the day of the checkup...
KNBlazer is offline vBGarage Page   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
[TN] FS 1992 CHP EVOC B4c/1LE Camaro Vintageracer Camaros for Sale 8 10-21-2015 11:26 PM
Flexplate prob 96 L31 5.7L vortec to 84 camaro 84z96L31vortec Tech / General Engine 6 09-23-2015 06:09 PM
350 carbureted to 305 tpi st.evel07 Engine Swap 5 08-13-2015 07:15 PM
Flexplate prob 96 L31 5.7L vortec to 84 camaro 84z96L31vortec North East Region 1 08-10-2015 09:27 PM
Whats the differance magnaflow dual cat setup onefreakz Exhaust 5 08-08-2015 12:49 AM


Go Back   Third Generation F-Body Message Boards > Tech Boards > Engine Swap

Tags
1985, 305, 350, 85, ac, ca, camaro, camero, carburated, chevy, engine, pass, smog, swap, v8, z28

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 09:04 AM.


All content copyright 1997 - 2014 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.