General Category > Quadrajet Carb Talk and Tips
Is this qjet ok for 400hp 10.5:1 Chevy 350?
novadude:
As said, the 7104 Performer RPM Q-jet or the ZZ4 manifold both perform very well with a Q-jet on a set-up like this. I've ran both - the ZZ4 on a 327, and the 7104 on a 350.
Camaro350:
Plans have changed a little, and I've ordered a core to play with from ebay, carb #17080260, think it's a BOP carb and it looks to be a 800cfm air horn.
http://www.ebay.com/itm/true-800-cfm-Rochester-quadrajet-carburator-spread-bore-off-1980-z28-camaro-/291092063629?_trksid=p2047675.l2557&_trkparms=gh1g%3DI291092063629.N19.S2.M-996.R1.TR4&nma=true&si=6jLxsK1XJzigW%252B2%252BgWFTbhNMhoo%253D&orig_cvip=true&rt=nc
I had a little money over so I went ahead and made an offer for one of these as well, just in case I mess up the used core I'll still have something to bolt on that should work ok:
http://www.ebay.com/itm/390787928765?_trksid=p2047675.m570.l4467&_trkparms=gh1g%3DI390787928765.N19.S2.M-982.R2.TR4
Reason for the "850cfm" carb is that I'm building a 421 sbc. Already have a prepped 4.155 Dart SHP on the way.
Cliff Ruggles:
I'd stay clear of any "remanufactured" or catalog carburetors. I get them in here all the time, and they are most often a MESS.
There is absolutely no such thing in this hobby as a generic "stage" 1, 2, 3, etc carburetor that you can pull out of the box and be calibrated exactly for what you are doing.
Most will run poorly, if at all. Expect to do some custom tuning in several areas if you go that route....FWIW....Cliff
Camaro350:
Thank you Cliff, I understand.
I read your book and had that in the back of my mind when I ordered it. It will be opened up and checked/calibrated, I just figured a "new" carb might be a good clean base, with all new linkages, pull offs, set screws etc etc.
I also have a #17057502 sitting on the original 350 and thanks to your book and that I find the layout/design of the Qjet really interesting, I'm really looking to learn these carburetors.
Cliff Ruggles:
I actually like getting some of those in here, nicely plated. Then I "gut" them completely out and put in much better parts and correct tuning components. Nothing wrong with starting out with a nice clean foundation, and much less labor intensive than working with an old rusty core.....Cliff
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