| Author |
Message |
magoo (Magoo)
| | Posted on Saturday, February 02, 2002 - 10:18 pm: | |
Be sure the pulley diameter is the same as required on your car. |
'75 308 GT4 (Peter)
| | Posted on Monday, January 28, 2002 - 7:16 pm: | |
On carb cars, its independant of of any other system, so simply remove, plug injector holes and cap-up the vacuum hook-ups on the intake manifolds (for the diverter valves).
Bret, from my Mondial 8 manual, it shows an alternative to the GT4's diverter valves, a single air-injection control valve. It either sends air to the cats, and/or to the manifolds, or both. This single valve is operated with vacuum from an electrovalve (and this receives a signal from a temp switch on the coolant tank). There should also be an EGR system on your car, it too is vacuum operated by an electrovalve (which receives its signal from a tachometric switch).
From the looks of it, yes its somewhat independant of the rest of the engine (ie: it won't disturb fuel mixtures and the way it runs). Don't forget to cap up the connections. You should have a schematic of the emissions system in your manuals. |
BretM (Bretm)
| | Posted on Monday, January 28, 2002 - 4:15 pm: | |
If you take the air injection system off of a 308QV will anything bad happen (other than the whole emissions thing which we don't care about)? What is involved in taking it off? |
Don Hewey (1975gt4don)
| | Posted on Monday, January 28, 2002 - 3:47 pm: | |
Yelcab, the air injection manifold, to my knowledge, is next to impossible to locate. No one that I know of the past two years has one. I wonder if there is a GM crossover part number to that. I doubt it. The air diffusers that fit inside of the heads are also next to impossible to find. Luckily, I kept mine. The only problem I have is that the injection manifold is rusty and breaking apart. |
Mitchell Minh Le (Yelcab1)
| | Posted on Saturday, January 26, 2002 - 11:45 pm: | |
Actually, I am sort of hoping that all the brackets and nozzles are no longer available from the dealer. If that is the case, I can go to the smog referee and claim that I tried, they check it out, issue a tag, and pass me.
Cross my finger and pray. |
Steve Magnusson (91tr)
| | Posted on Saturday, January 26, 2002 - 5:45 pm: | |
Mitchell -- the later single air pump is large enough to supply both banks simultaneously so from a functional/"pass-the-test" point of view you probably could fit the later single air pump configuration onto your '75; however, since it's going to take a few $s either way, you might want to put some effort into trying to get the "correct" version for your model year first. Regardless of 1 or 2 pump configuration, I'd recommend that you get an appropriate Spare Parts Catalogue for the version you'd be trying to replicate.
I think you can still get the air injector nozzles and the air injection manifolds from the usual places (e.g., T. Rutlands); otherwise you're stuck with maybe running a "wanted" ad in the FML (and on FerrariAds.com of course!). |
Mitchell Minh Le (Yelcab1)
| | Posted on Saturday, January 26, 2002 - 3:06 pm: | |
It is an 75 GT4, and I believe it comes with 2 pumps, although, I can probably make do with one pump and make sure the test probe goes into that bank.
If the pump fits, I still need the four nozzles that fit into the exhaust side of the head. Who's got one?
Mitchell |
Steve Magnusson (91tr)
| | Posted on Saturday, January 26, 2002 - 11:37 am: | |
Mike F. -- I had thought that it's the other way around -- i.e., the single "GM" air pumps used on the late '70s F V8s had Standard (English) threads/bolts and that the "metric" thread/bolt version air pumps didn't show up until later models, but on reflection I have no absolute evidence for this. Any original Owners out there who could check on a car from that era which they know is (relatively) unmolested air pump-wise? I'd agree that either can be made to work well.
Mitchell -- depending on your location you may or may not have retailers with access to this US air pump manufacturer (AirCardone), but if you're looking for the large single carbed-308 air pump here's another alternative:
AirCardone 32-109 (metric threads)
AirCardone 32-112 (standard/english threads) |
Mike Fisher (Mikef)
| | Posted on Saturday, January 26, 2002 - 9:54 am: | |
Mitchell,
Here are some part numbers from any NAPA store.
Air pumps: NAPA 51-107, GM 7817815
Diverter valves: Echlin 1099, GM 7030761
Check valves: Echlin 2-29000, GM 5354987
Ask to get metric thread models, or you will need to replace bolts & nuts(no big deal)with standard. |
Steve Magnusson (91tr)
| | Posted on Friday, January 25, 2002 - 11:32 pm: | |
Mitchell -- what year 308GT4? -- are you looking for the early two air pump set-up stuff (like shown in the WSM) or the later single air pump set-up? Also where are you located? |
Bill Sebestyen (Bill308)
| | Posted on Friday, January 25, 2002 - 9:32 pm: | |
Mitchell,
The smog pump on my 78 GTS was indeed a GM part, I believe out of a Buick. The associated heat shield, curved output tube, brackets, and pulley I'm pretty sure are F-car parts.
The diverter valve on my car was an Italian part, but on many other 308's, its a GM part, identified by a GM number in the service manual.
The air injection manifolds are F-car parts. Bill |
Frank Parker (Parkerfe)
| | Posted on Friday, January 25, 2002 - 7:30 pm: | |
They are GM parts. If you can find the part numbers you can cross reference and find it all at a NAPA store. |
Mitchell Minh Le (Yelcab1)
| | Posted on Friday, January 25, 2002 - 7:17 pm: | |
I am looking for a smog pump, bracket, hoses, and the tubing that goes into the head from the hoses. Anybody has them, or know where to get them? |
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