79 Exhaust Upgrades

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Bunnet
Posts: 9
Joined: Sun Apr 12, 2015 10:00 am
Your car is a: 1979 Spider Pininfarina 2000
Location: Florida

79 Exhaust Upgrades

Postby Bunnet » Tue Dec 29, 2015 10:48 am

Ok, so I'm trying to purchase or at least find an performance exhaust manifold for 79's spider, but after searching and searching I found nothing. Suppose you can use the 1800 exhaust, but do you have to have the heads from 1800, because I don't, then the other question is. Has anyone found an exhaust manifold that work for the 79 and its improvement without too massive of modifications?
1979 Spider 2000 (project currently not running)
2002 Mazda Miata (3d, daily drive)

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RRoller123
Posts: 6949
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Your car is a: 1980 FI SPIDER 2000
Location: PLYMOUTH, MA USA
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Re: 79 Exhaust Upgrades

Postby RRoller123 » Tue Dec 29, 2015 10:52 am

Check Mark Allison's web site, and AR, Midwest Bayless, etc. I think they all carry these. The 4-2-1 FIAT is considered pretty good in its own right too.

Pete
'80 FI Spider 2000 (rolling "resto")
'74 X1/9 (many years ago)
'79 X1/9 (fewer years ago)
'86 Jaguar XJ6 (2nd Hobby Car)
2011 Chevy Malibu (daily driver)
2010 Chevy Silverado 2500HD Ext Cab 4WD/SB
2015 Keystone Montana High Country 343RL

Bunnet
Posts: 9
Joined: Sun Apr 12, 2015 10:00 am
Your car is a: 1979 Spider Pininfarina 2000
Location: Florida

Re: 79 Exhaust Upgrades

Postby Bunnet » Tue Dec 29, 2015 1:04 pm

Thank you, for those site I'll shall be visiting them and inquiring about the proper exhaust system modifications.

Does the 4-2-1, bolt up to the 79' unique exhaust system without any further modification?
1979 Spider 2000 (project currently not running)
2002 Mazda Miata (3d, daily drive)

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toplessexpat
Posts: 1173
Joined: Fri Aug 31, 2012 2:29 am
Your car is a: 1976 Spider 1800
Location: Houston, TX

Re: 79 Exhaust Upgrades

Postby toplessexpat » Tue Dec 29, 2015 3:34 pm

I've got the Abarth replica exhaust on my 1800 - runs very nicely indeed. Came from AutoRicambi.

A
---
Many classic Fiats - it's a disease!
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RRoller123
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Your car is a: 1980 FI SPIDER 2000
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Re: 79 Exhaust Upgrades

Postby RRoller123 » Tue Dec 29, 2015 3:50 pm

I am no expert, but I think the 4-2-1 will bolt up to any 2L block/Head combo, but if I carbed, the port for the O2 sensor would have to be plugged, and vice versa. Someone with way more knowledge than I will have to confirm this.
'80 FI Spider 2000 (rolling "resto")
'74 X1/9 (many years ago)
'79 X1/9 (fewer years ago)
'86 Jaguar XJ6 (2nd Hobby Car)
2011 Chevy Malibu (daily driver)
2010 Chevy Silverado 2500HD Ext Cab 4WD/SB
2015 Keystone Montana High Country 343RL

bobplyler
Posts: 651
Joined: Sat Jan 30, 2010 7:58 pm
Your car is a: 1979 spider 2000
Location: Charlotte, NC

Re: 79 Exhaust Upgrades

Postby bobplyler » Tue Dec 29, 2015 4:47 pm

Bunnet wrote:Does the 4-2-1, bolt up to the 79' unique exhaust system without any further modification?

The 79 comes with a 4-2-1 exhaust.
1979 Fiat Spider (since new)
2005 Lincoln LS (the wife's car)
2003 Chevrolet Cavalier (daily driver)
1999 Honda Shadow VLX 600
1972 Grumman Traveller 5895L (long gone).

garion
Posts: 508
Joined: Tue Sep 18, 2012 10:20 pm
Your car is a: 1978 Fiat 124 Spider
Location: Phoenix, AZ

Re: 79 Exhaust Upgrades

Postby garion » Tue Dec 29, 2015 11:04 pm

bobplyler wrote:The 79 comes with a 4-2-1 exhaust.


Yep, my 79 has one.
--John
1978 Fiat 124 Spider (for sale soon)
1979 Fiat 124 Spider
2007 Audi A4
Blog: http://www.technobabelfish.com

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mpollock
Posts: 87
Joined: Mon May 09, 2011 10:06 pm
Your car is a: 1979 spider 2000
Location: North side of Indianapolis
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Re: 79 Exhaust Upgrades

Postby mpollock » Wed Dec 30, 2015 12:09 am

The California 79 came with a 4-1 exhaust manifold. I'm looking at replacing it with the header and performance exhaust from Vicks.

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So Cal Mark
Posts: 13841
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Your car is a: lots and lots of Fiats
Location: upland, ca.
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Re: 79 Exhaust Upgrades

Postby So Cal Mark » Wed Dec 30, 2015 1:27 am

you'll find that their header needs quite a bit of work to make it fit. My header can be ordered with the extra extension on the flange that will enable the egr system to function
Mark Allison
allisonsautomotive.com Fiat and Alfa Romeo parts and service. Performance parts our specialty!
Headers, ignitions, wheels, cams, flywheels
starsmark@hotmail.com 909-981-3566

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toplessexpat
Posts: 1173
Joined: Fri Aug 31, 2012 2:29 am
Your car is a: 1976 Spider 1800
Location: Houston, TX

Re: 79 Exhaust Upgrades

Postby toplessexpat » Wed Dec 30, 2015 6:19 am

If you get an exhaust system which has the O2 port and don't want it - then it's very easy to bung it. Or alternatively install a wideband O2 sensor and gauge, and see your air/fuel mixture, and work on tuning to balance it as close to 14.7:1 as you can.

If you've got a stock engine - then there's a limit to the performance you can get out of a header upgrade anyway.
---
Many classic Fiats - it's a disease!
forum.mirafiori.com

carl
Posts: 244
Joined: Mon Oct 06, 2008 9:56 am
Your car is a: 1971 128

Re: 79 Exhaust Upgrades

Postby carl » Thu Dec 31, 2015 9:45 am

In answer to the basic question, any 124 exhaust manifold will bolt up to a 2L (including 79) head....the port and stud arrangement are the same. If you are not using the EGR system, then you can just ignore it.....it's a simple pass through in the head with no connection to anything internal of the head. I put an 1800 intake manifold and a 1608 exhaust manifold and exhaust system on my 79 spider with no problem. Here in Va we don't have emissions testing on older cars so obviously the EGR stuff was tossed in the trash.

If you need the EGR then that's a different story. Late 70s spiders had EGR systems that incorporated a pipe that went over the top of the head so you could possibly try this if wanting an earlier 4-2-1 exhaust manifold. The 4-2-1 manifold does make a power difference and oddly enough the exhaust note sounds better too.

Also as noted, many 79s came with a 4-2-1 exhaust manifold and that's probably the easiest way to go.

carl

Bunnet
Posts: 9
Joined: Sun Apr 12, 2015 10:00 am
Your car is a: 1979 Spider Pininfarina 2000
Location: Florida

Re: 79 Exhaust Upgrades

Postby Bunnet » Mon Jan 04, 2016 10:09 am

So Cal Mark wrote:you'll find that their header needs quite a bit of work to make it fit. My header can be ordered with the extra extension on the flange that will enable the egr system to function
I try calling you guys, but the phone only gave as busy.

And thank you to everyone for your answer and suggestion. They have help a million
1979 Spider 2000 (project currently not running)
2002 Mazda Miata (3d, daily drive)

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So Cal Mark
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Your car is a: lots and lots of Fiats
Location: upland, ca.
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Re: 79 Exhaust Upgrades

Postby So Cal Mark » Mon Jan 11, 2016 9:27 am

we get lots of phone calls. Send me your number in a private message and we'll call you
Mark Allison
allisonsautomotive.com Fiat and Alfa Romeo parts and service. Performance parts our specialty!
Headers, ignitions, wheels, cams, flywheels
starsmark@hotmail.com 909-981-3566

raugsburger
Posts: 1
Joined: Wed May 17, 2017 3:35 pm
Your car is a: Fiat 124 Spider carbureted 2000

Re: 79 Exhaust Upgrades

Postby raugsburger » Wed May 17, 2017 5:50 pm

carl wrote:In answer to the basic question, any 124 exhaust manifold will bolt up to a 2L (including 79) head....the port and stud arrangement are the same. carl


So Carl, or others, what exhaust manifolds have you been using, I am also guessing everyone is simply plugging the EGR crossover in the head? has anyone seen deterioration of performance because of this, I would expect it to increase, due to more oxygen and no exhaust gas is introduced in the header?

Appreciate any feedback and recommendations you may have on a better 4-2-1 exhaust solution than the 4-1 that came with my car.

Thanking you in advance, take care

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So Cal Mark
Posts: 13841
Joined: Wed Jan 25, 2006 3:45 pm
Your car is a: lots and lots of Fiats
Location: upland, ca.
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Re: 79 Exhaust Upgrades

Postby So Cal Mark » Thu May 18, 2017 1:27 am

look at my videos in this section on exhaust flow, none of the stock manifolds are performance parts
Mark Allison
allisonsautomotive.com Fiat and Alfa Romeo parts and service. Performance parts our specialty!
Headers, ignitions, wheels, cams, flywheels
starsmark@hotmail.com 909-981-3566


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