Will a 4v cause emission issues???
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Freshman User
Joined: Feb 2004
Posts: 28
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From: Phoenix Area
Will a 4v cause emission issues???
Just had a thought guys,
I live in Phoenix, AZ and we have to go through emissions on vehicles 67 or newer. I need to know if a 73 f100 with a 390 would have had the option to come stock from the factory with a 4v intake and carb? I don't want to end up in trouble if that is something that might give me an issue.
My truck currently has a 2v manifold and EGR plate with a 2 barrel carb. Will putting a 4v manifold with an EGR plate and a 4 barrel carb cause me a problem?
Also, do you think a 4v will give me better power or economy and is it even worth it?
Thanks!
I live in Phoenix, AZ and we have to go through emissions on vehicles 67 or newer. I need to know if a 73 f100 with a 390 would have had the option to come stock from the factory with a 4v intake and carb? I don't want to end up in trouble if that is something that might give me an issue.
My truck currently has a 2v manifold and EGR plate with a 2 barrel carb. Will putting a 4v manifold with an EGR plate and a 4 barrel carb cause me a problem?
Also, do you think a 4v will give me better power or economy and is it even worth it?
Thanks!
Senior User
Joined: Jul 2002
Posts: 364
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From: Tucson USA
You can run a 4v no problem - I do and I am in Tucson. I assume Pinal County is the same as Pima, for the most part. As long as you keep the EGR, since it was there originally, you should be fine.
As far as economy/power - you can have either. A well-tuned 4v will get better mileage if you keep your foot out of it. Conversely, a well tuned 4v will give you greater performance with a slight decrease in economy if you have a heavy foot.
If your 390 is stock, I have been pretty happy with my Edelbrock #1406: 600 cfm w/ electric choke. It's easy to adjust and is friendly to a daily driver. As well, spring for the aluminum manifold if you can - it's better in every way. *eBay is a decent source* ...as are the calssifieds
-Patrick
As far as economy/power - you can have either. A well-tuned 4v will get better mileage if you keep your foot out of it. Conversely, a well tuned 4v will give you greater performance with a slight decrease in economy if you have a heavy foot.
If your 390 is stock, I have been pretty happy with my Edelbrock #1406: 600 cfm w/ electric choke. It's easy to adjust and is friendly to a daily driver. As well, spring for the aluminum manifold if you can - it's better in every way. *eBay is a decent source* ...as are the calssifieds
-Patrick
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Freshman User
Joined: Feb 2004
Posts: 28
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From: Phoenix Area
Originally Posted by TheImpaler
If your 390 is stock, I have been pretty happy with my Edelbrock #1406: 600 cfm w/ electric choke. It's easy to adjust and is friendly to a daily driver. As well, spring for the aluminum manifold if you can - it's better in every way. *eBay is a decent source* ...as are the calssifieds
-Patrick
-Patrick
Also, where did you find an aliminum EGR manifold? I've searched high and low and I can't find one. Even cast iron ones with EGR have been scarce. Please tell me where you found one!
