I'm looking for some opinions on the timing of rebuilding a Qjet. I have a 7028264 that I picked up. I'm not exactly sure when I'll be rebuilding the engine or what's previously been done to it. It's the original engine and I know it's been rebuilt, just not sure when. Is it better to wait and have the carb rebuilt when I'm having the engine done, so I know what specs the engine will have? Or, can I go ahead and have the carb done now?
I appreciate any feedback!
68 400 convertible - recent purchase
Used to own: 69 400 convertible - Winward Blue 69 350 convertible - Verdoro Green 69 350 coupe - Matador Red
I'm looking for some opinions on the timing of rebuilding a Qjet. I have a 7028264 that I picked up. I'm not exactly sure when I'll be rebuilding the engine or what's previously been done to it. It's the original engine and I know it's been rebuilt, just not sure when. Is it better to wait and have the carb rebuilt when I'm having the engine done, so I know what specs the engine will have? Or, can I go ahead and have the carb done now?
I appreciate any feedback!
I figured I would need to rebuild my engine but after testing it we found 2 leaky valves and everything else was great. I just did a refurbish and replaced my carb with the proper stock carb (used Qjet). Carb runs great so I'm leaving her alone. If it looks pretty dated I would just get it rebuilt. Gaskets get cracked, floats stop floating etc. lol . Always give your builder max advance notice...better for both car guy and builder.
Last edited by Gus68; 03/04/1907:10 PM.
Engine Test Stand Playlist: https://www.youtube.com/playlist?list=PLwoxyUwptUcdqEb-o2ArqyiUaHW0G_C88 restoring my 1968 Firebird 400 HO convertible (Firedawg) 1965 Pontiac Catalina Safari Wagon 389 TriPower (Catwagon) 1999 JD AWS LX Lawn tractor 17hp (my daily driver) 2006 Sequoia 2017 Murano (wife's car) 202? Electric car 203? 68 Firebird /w electric engine 2007 Bayliner 175 runabout /w 3.0L Mercuiser__________________________________________________________
So, as long as I don't build the engine to out-gas the Qjet, I can have the carb rebuilt to standard specs? When the time comes, I will probably put a little bit more cam in the engine but still close to stock.
68 400 convertible - recent purchase
Used to own: 69 400 convertible - Winward Blue 69 350 convertible - Verdoro Green 69 350 coupe - Matador Red
Id wait to have it built till you need it. Things always change in the meantime. Besides seals go bad, rubber dries out, rebuild parts get better, fuel changes now and then. Not good having parts sitting on the shelf for a long time. Hell, things get lost in my garage. I'm just saying my car sat for 10 years for one rebuild!
He'll put together a kit including any tuning parts need for your specific engine. You can rebuild the carburetor yourself, get his book as well, very good reading and information.
I have my 400 being rebuilt right now, and the list of questions he had for me was seemingly endless. Lots of considerations there, especially if you are going to big (punch it out to .040 and stroke it) you may need something bigger than the 750 QJet. I readily admit, I know nothing about these cars (compared to the average member on here), but every time I have followed the advice here, it has been right. Every time I have not asked, I was wrong.
1957 Thunderbird 289 1967 Firebird Base 461 1968 C-20 327
I appreciate all the input! I'm in no hurry, so it sounds like waiting is the best option at this point. I'll either send it to Cliff's or to Quadrajet Power when the time comes. I've tried rebuilding carbs myself in the past, and it never seems to work out well. Has a Holley on it now. Bought the car with it on there so it'll have to hold me over.
68 400 convertible - recent purchase
Used to own: 69 400 convertible - Winward Blue 69 350 convertible - Verdoro Green 69 350 coupe - Matador Red
