Question for Sofa #6211 Holley install
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Joined: Dec 2006
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From: Hoffman Estates Il
Car: '88 IROC T5 Vert ‘13 Vette
Engine: 305 TBI
Transmission: T5
Axle/Gears: 3:08
Question for Sofa #6211 Holley install
Hello all, including Sofa, or others,
When you swapped the computer Quadrajet for the 800CFM #6211 mech secondary Holley after installing the lower-vacuum XR282HR cam and replaced the HEI in your 400 SBC with a non computer version, how much smog tubing, smog pump etc was removed was removed? Did you also remove the heater valve alongside the pass valve cover?
Did that help clean up (if that's the right way to say it)the engine bay? Just asking.
When you swapped the computer Quadrajet for the 800CFM #6211 mech secondary Holley after installing the lower-vacuum XR282HR cam and replaced the HEI in your 400 SBC with a non computer version, how much smog tubing, smog pump etc was removed was removed? Did you also remove the heater valve alongside the pass valve cover?
Did that help clean up (if that's the right way to say it)the engine bay? Just asking.
Joined: Sep 2005
Posts: 28,022
Likes: 2,496
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Question for Sofa #6211 Holley install
The whole AIR system was removed, as the headers I was using at the time (SLP) didn't have the ports for it.
My car didn't come with a HCV. I actually got the control head (to get the addl vacuum port) & harness including the vacuum lines out of a later car and added one, to help the AC be as cool as possible. It didn't add much stuff under the hood though; just the valve itself which only had 2 ports, and a vacuum line.
Since all the ECM wiring, AIR tubes, etc. was gone off the top, the engine was pretty stripped-down. I always keep my cars clean so I don't think any of that really had much impact.
My car didn't come with a HCV. I actually got the control head (to get the addl vacuum port) & harness including the vacuum lines out of a later car and added one, to help the AC be as cool as possible. It didn't add much stuff under the hood though; just the valve itself which only had 2 ports, and a vacuum line.
Since all the ECM wiring, AIR tubes, etc. was gone off the top, the engine was pretty stripped-down. I always keep my cars clean so I don't think any of that really had much impact.
Thread Starter
Member
Joined: Dec 2006
Posts: 276
Likes: 13
From: Hoffman Estates Il
Car: '88 IROC T5 Vert ‘13 Vette
Engine: 305 TBI
Transmission: T5
Axle/Gears: 3:08
Re: Question for Sofa #6211 Holley install
Sofa,
Thanks for the reply... Always wondered how the final iteration looked like underneath there with that lumpy 400 SBC of yours.
Can I ask, did you use a L69 dual snorkle air cleaner back then?
Thanks for the reply... Always wondered how the final iteration looked like underneath there with that lumpy 400 SBC of yours.
Can I ask, did you use a L69 dual snorkle air cleaner back then?
Joined: Sep 2005
Posts: 28,022
Likes: 2,496
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Question for Sofa #6211 Holley install
Yes I did. 
Couldn't really fit anything else under my L69 "composite" hood unfortunately. It was kinda lower and flatter than the steel hoods on the other Z28s of the day. Can't speak definitively to the misc Firebird variants at the time butt I'm pretty sure they suffered even more greatly from all that. One reason I bought a Camaro instead of a Bird back when they were all new.
Couldn't really fit anything else under my L69 "composite" hood unfortunately. It was kinda lower and flatter than the steel hoods on the other Z28s of the day. Can't speak definitively to the misc Firebird variants at the time butt I'm pretty sure they suffered even more greatly from all that. One reason I bought a Camaro instead of a Bird back when they were all new. 
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