To EFE or not?
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Joined: Jan 2005
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From: Frederick, MD
Car: 1987 Z28
Engine: 305, quadrajet
Transmission: Auto
To EFE or not?
I'm installing Edelbrock TES (for TPI) on my carbed (LG4) 305. Do I have to re-install the EFE valve or can I leave it out? Thanks.
Joined: Mar 2000
Posts: 43,187
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
From what I understand (and I don't have TES):
The LG4-specific TES require the reinstallation of the EFE in order to get the y-pipe connected to the headers.
The TPI-application TES do no use the EFE, and trying to install the valve would require modifying the supplied y-pipe.
As for emissions, the only place that I've heard will squawk no-EFE valve is California. Here, where they have a pretty strict inspection and sniffer, they didn't say anything about it not being there. They looked it over pretty thoroughly, including the underhood vacuum stickers, then gave it a "pass".
I've never heard that Maryland is that strict about inspection. But, you'd be better served checking that out before trying. Well, maybe try going through w/o the valve first, then putting it in if they fail you.
FWIW, the Chevy High Performance magazine project series, "My Generation Camaro", found the LG4 EFE valve was a major restriction to the TES. They never figured out the L69 valve is a better choice.
The LG4-specific TES require the reinstallation of the EFE in order to get the y-pipe connected to the headers.
The TPI-application TES do no use the EFE, and trying to install the valve would require modifying the supplied y-pipe.
As for emissions, the only place that I've heard will squawk no-EFE valve is California. Here, where they have a pretty strict inspection and sniffer, they didn't say anything about it not being there. They looked it over pretty thoroughly, including the underhood vacuum stickers, then gave it a "pass".
I've never heard that Maryland is that strict about inspection. But, you'd be better served checking that out before trying. Well, maybe try going through w/o the valve first, then putting it in if they fail you.
FWIW, the Chevy High Performance magazine project series, "My Generation Camaro", found the LG4 EFE valve was a major restriction to the TES. They never figured out the L69 valve is a better choice.
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