Passing emissions with headers with motor swap.
08-02-2004, 11:11 PM
#1
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Thread Starter
Join Date: Sep 2003
Posts: 368
Passing emissions with headers with motor swap.
Ok fellas, i blew the trans in my 92 the other day. I happen to have my old 350 TPI motor and trans out of my roc sitting in my garage HMMMMM?? 
The TPI motor is useless to me because im building a BBC for my roc. I want to put the TPI and good 700 r4 in the RS. What do i have to do to put the TPI motor in the RS. Swap motors, engine harness, computer and FP?? Will i still have to pass emissions with a diff. motor? The TPI motor has no air pump or the lines etc. I ordered hooker headers for the RS but they have no holes for o2 or AIR injection. I will get the 02 bung welded in but not the air lines. So im assuming if i get the TPI motor in the RS and just run 2 cats after the headers into single exhaust i should be fine???
All help will be greatly apreciated.
The TPI motor is useless to me because im building a BBC for my roc. I want to put the TPI and good 700 r4 in the RS. What do i have to do to put the TPI motor in the RS. Swap motors, engine harness, computer and FP?? Will i still have to pass emissions with a diff. motor? The TPI motor has no air pump or the lines etc. I ordered hooker headers for the RS but they have no holes for o2 or AIR injection. I will get the 02 bung welded in but not the air lines. So im assuming if i get the TPI motor in the RS and just run 2 cats after the headers into single exhaust i should be fine???All help will be greatly apreciated.
08-03-2004, 08:31 AM
#3
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Join Date: May 2003
Posts: 158
Re: Passing emissions with headers with motor swap.
I assume the RS is either carbed, or TBI, and the 85' is a 305?
The 85' has a piggyback controller for the MAF.
You should use an 89' engine harness, ECM and Chip.
Don't know if you can get a cat on the drivers side because there's no recess like the passenger side.
There's no way you're going to pass a visual on a 92' if it's required (with an 85' TPI,) you can up grade an older model, but you can't down grade a newer one, unless you're only changing blocks.
But, as we all know rules where meant to be broken, especially if you know the right people.
The 85' has a piggyback controller for the MAF.
You should use an 89' engine harness, ECM and Chip.
Don't know if you can get a cat on the drivers side because there's no recess like the passenger side.
There's no way you're going to pass a visual on a 92' if it's required (with an 85' TPI,) you can up grade an older model, but you can't down grade a newer one, unless you're only changing blocks.
But, as we all know rules where meant to be broken, especially if you know the right people.
08-05-2004, 01:59 AM
#5
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Join Date: Mar 2001
Posts: 3,249
Re: Passing emissions with headers with motor swap.
Probably have to put back the AIR stuff or you won't pass visual. If they just sniff you will be ok as long as your cat is up to snuff. AIR only sends air into the exhaust manifold when the engine is cold or it will mess up the O2 sensor readings. Once it is warmed up, the AIR system sends the air straight to the cat, IIRC.
08-05-2004, 07:39 AM
#7
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Join Date: Jan 2001
Location: Florida. USA
Posts: 1,790
Re: Passing emissions with headers with motor swap.
Once you start messing with the emission control parts, you are heading for failure at test time. Emission testing is not gone to let up but only become more strict to get older cars off the road. Take that State made up of idiots out west as a example. Best advice, leave it alone. I have made a engine swap with all emission controls intact and had no problems pasing three tests in Ohio, before moving.
08-05-2004, 08:58 AM
#8
Registered User
Join Date: May 2003
Posts: 158
Re: Passing emissions with headers with motor swap.
Originally Posted by transxtreme
Is AIR required for emissions?? I think im just going to leave it on but just have the tubes dump somewhere.
Text in red are my comments
Originally Posted by John De Armond
X-Source: The Hotrod Mailing list
Date: Feb 1992
Subject: Re: Legality of Modifications
X-Source: The Hotrod Mailing list
Date: Feb 1992
Subject: Re: Legality of Modifications
First off, the CAA, along with an EPA ruling now specifically DOES allow
putting later model engines in earlier vehicles of the same type "Not earlier model engines in late model vehicles of the same type.".
So if I want to take the wheezing 350 out of my 79 El Camino and drop in
a late model Corvette engine, I can now do it legally if I install
all the emission equipment. In the bad old days, I would have had to
go through the whole OEM emission certification test battery just like
GM does.
Secondly, the EPA had agreed to accept California Air Resources
Board Executive Orders and certification procedures as valid
for the whole US. What does that mean? CARB has had a
procedure for several years whereby an aftermarket manufacturer
could SELF-CERTIFY his high performance part as being as good
or better than OEM parts for a car or a line of cars. Once
certified, the vendor can supply a copy of the EO with the part
and emissions stations will pass the vehicle assuming it passes
the sniff test. Vendors of components not likely to affect
emissions such as aftermarket electronic ignition systems can
get blanket EOs which covers their entire line for all cars.
Jacobs Electronics had done this for their ignitions, for
example. The self-certification process is a small subset of
the OEM certification and involves not much more than a runup on
the dyno with a sniffer in the tailpipe.
Can you make clean horsepower? Sure as hell can. A quick purusual of
the catalogs shows things like high flow cat converters, EO'd carbs and
manifolds, cams and all the rest. Several aftermarket fuel injection
makers including EFI, NOS, and Electromotive either have or will soon
have EOs for many popular engines. Now you're not gonna be able to
hang a couple of 750 cfm carbs off your 350 small block and go lumping
down the road. But in my book, that's a plus.
Let's remember too, that a vehicle only has to meet specs for its model
year. So I could take my '79 El Camino, put an extensively modified
engine in it, hang a high performance cat off the back and meet the
79 emission specs.
Who can we thank for working all of this out? SEMA. SEMA has a nice
certification kit available to people who want to self-certify a
part. They also maintain a list of facilities that do the certification
testing.
We should all be happy at this point. EPA has given us a legal avenue
to high performance where none existed before. If anyone is in the
mood for writing letters, send one to the EPA asking that the current
procedures be made permanent (they are now provisional) and write to
SEMA thanking them for fixing things.
putting later model engines in earlier vehicles of the same type "Not earlier model engines in late model vehicles of the same type.".
So if I want to take the wheezing 350 out of my 79 El Camino and drop in
a late model Corvette engine, I can now do it legally if I install
all the emission equipment. In the bad old days, I would have had to
go through the whole OEM emission certification test battery just like
GM does.
Secondly, the EPA had agreed to accept California Air Resources
Board Executive Orders and certification procedures as valid
for the whole US. What does that mean? CARB has had a
procedure for several years whereby an aftermarket manufacturer
could SELF-CERTIFY his high performance part as being as good
or better than OEM parts for a car or a line of cars. Once
certified, the vendor can supply a copy of the EO with the part
and emissions stations will pass the vehicle assuming it passes
the sniff test. Vendors of components not likely to affect
emissions such as aftermarket electronic ignition systems can
get blanket EOs which covers their entire line for all cars.
Jacobs Electronics had done this for their ignitions, for
example. The self-certification process is a small subset of
the OEM certification and involves not much more than a runup on
the dyno with a sniffer in the tailpipe.
Can you make clean horsepower? Sure as hell can. A quick purusual of
the catalogs shows things like high flow cat converters, EO'd carbs and
manifolds, cams and all the rest. Several aftermarket fuel injection
makers including EFI, NOS, and Electromotive either have or will soon
have EOs for many popular engines. Now you're not gonna be able to
hang a couple of 750 cfm carbs off your 350 small block and go lumping
down the road. But in my book, that's a plus.
Let's remember too, that a vehicle only has to meet specs for its model
year. So I could take my '79 El Camino, put an extensively modified
engine in it, hang a high performance cat off the back and meet the
79 emission specs.
Who can we thank for working all of this out? SEMA. SEMA has a nice
certification kit available to people who want to self-certify a
part. They also maintain a list of facilities that do the certification
testing.
We should all be happy at this point. EPA has given us a legal avenue
to high performance where none existed before. If anyone is in the
mood for writing letters, send one to the EPA asking that the current
procedures be made permanent (they are now provisional) and write to
SEMA thanking them for fixing things.
08-05-2004, 04:59 PM
#9
Registered User
Join Date: Dec 2002
Posts: 324
Re: Passing emissions with headers with motor swap.
He can do whatever he wants with the 79 El Camino, cars are exempt from emissions after 25 years.
As for your car as long as all the emmissions stuff, air, cat, egr, etc is there and it passes the sniffer test I cannot see it failing. Can they even find out if its an RS or Z28 from the Vin number or does it just say camaro? Tell them its a z28, the car was in an accident and the replacement parts came off an RS.
Or just sell that tpi and buy a 350tbi (assuming you already have tbi), it is just about identical to the 305tbi so they have no way of knowing it has been swapped unless they get the numbers off the block. If they question why its shiney and new looking just tell them the motor was rebuilt recently.
As for your car as long as all the emmissions stuff, air, cat, egr, etc is there and it passes the sniffer test I cannot see it failing. Can they even find out if its an RS or Z28 from the Vin number or does it just say camaro? Tell them its a z28, the car was in an accident and the replacement parts came off an RS.
Or just sell that tpi and buy a 350tbi (assuming you already have tbi), it is just about identical to the 305tbi so they have no way of knowing it has been swapped unless they get the numbers off the block. If they question why its shiney and new looking just tell them the motor was rebuilt recently.
08-06-2004, 11:30 PM
#10
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Thread Starter
Join Date: Sep 2003
Posts: 368
Re: Passing emissions with headers with motor swap.
It says RS all over the car, ground effects, bumper, dash etc. I dk about the z28 thing. Im leaving the egr and im going to run a high flow cat. Im going to just take the air tubes off but leave the AIR pump on so it looks like i have it. Where in IL do i have to live to not have emissions.
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