Optispark question (vented non-vented)
#1
Optispark question (vented non-vented)
Is there anyone that can tell me how to tell the difference between the two? I just picked up a 94 Z28, but noticed that there is a vent tube going to the intake elbow. I just need to know if he just upgraded with a vent tube, or actually converted his opti. Are there seperate codes on the two that would help me?
#3
In f-body cars 93-94 were non-vented and 95-97s were vented. There were no midyear changes.
The previous owner could have vented it or even put an MSD cap on it (that makes it vented). Or it could have a complete vented conversion to the vented style.
There are some pics on my Tech Page in this section: http://shbox.com/1/component_location_views.html
The previous owner could have vented it or even put an MSD cap on it (that makes it vented). Or it could have a complete vented conversion to the vented style.
There are some pics on my Tech Page in this section: http://shbox.com/1/component_location_views.html
#4
#5
My Msd Pro Billet has a part number for 93-94 and one for 94-96 so i assumed they made both. I bought the late model one and it was vented and mine car is a 94. Maybe the gm wasn't vented which is where i went wrong. If you both think im wrong then theres no way it could be right but it would be .
Here they are:
http://store.summitracing.com/partde...5&autoview=sku
http://store.summitracing.com/partde...5&autoview=sku
Here they are:
http://store.summitracing.com/partde...5&autoview=sku
http://store.summitracing.com/partde...5&autoview=sku
#6
Is there anyone that can tell me how to tell the difference between the two? I just picked up a 94 Z28, but noticed that there is a vent tube going to the intake elbow. I just need to know if he just upgraded with a vent tube, or actually converted his opti. Are there seperate codes on the two that would help me?
Last edited by 94zgreenmachine; 04-27-2008 at 06:15 AM.
#7
My Msd Pro Billet has a part number for 93-94 and one for 94-96 so i assumed they made both. I bought the late model one and it was vented and mine car is a 94. Maybe the gm wasn't vented which is where i went wrong. If you both think im wrong then theres no way it could be right but it would be .
Here they are:
http://store.summitracing.com/partde...5&autoview=sku
http://store.summitracing.com/partde...5&autoview=sku
Here they are:
http://store.summitracing.com/partde...5&autoview=sku
http://store.summitracing.com/partde...5&autoview=sku
#8
As far as I know, we're talking about F-Bodys here. 93/94 F-Body was unvented. 95-97 F-Body was vented. Don't get confused by catalog listings for non-GM branded items that are made to fit the F-Bodys as well as the 92-96 Corvettes and the 94-96 B-Bodys.
Last edited by Injuneer; 04-27-2008 at 10:39 AM.
#9
Exactly. I qualified my post by saying f-body. B-bodies got the vented earlier.
#10
I tried to shed a little light to the original poster and I am trying to understand what mrmint69 was getting at in his post.
My Msd Pro Billet has a part number for 93-94 and one for 94-96 so i assumed they made both. I bought the late model one and it was vented and mine car is a 94. Maybe the gm wasn't vented which is where i went wrong. If you both think im wrong then theres no way it could be right but it would be .
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