i was wondering, i have my original Q-jet to my true 72 GS350 but i dont no what state its in. the car i bought has a wierd and long story but long story short the car came with a 73 455 out of a riviera, chevy 350 in the car, and last but not least the original matching numbers block, heads, intake, tranny.......and everything else but all in boxes and taken apart and as of right now i have it machined and rebuilt waiting in the engine compartment. the car only has about 67,000 miles and it even has the original drums.... like i said, it has original everything. but back on topic, the chevy had a fairly new edelbrock 600cfm and i know i works because i started the chevy and it ran fine. so which is better for a stock rebuilt 350 with a mild cam... i dont plan to race it but still want performance to be there when i "need" it and which runs better. also does anyone know what a 72 gs350 Q-jet cfm is? And if i use the edelbrock i have to use a spacer, which spacer is best an "open 4 bore to open spread" or "4 bore to spread"?
About 5 times a year we have people come on here and complain about a Buick 350 that feels low on power, 3 out of the 5 are using an Edelbrock carb.... I have been building and tuning Buick 350 engines for the past 12 years so here is some info for you: 1. The Edelbrock carb on your car will require internal modifications to run correctly on your car 2. It will take a lot of trial and error to make that Edelbrock car work well on your car 3. That Edelbrock carb will never get as good of fuel mileage compared to a stock Q jet carb 4. That Edelbrock carb will not give the same full throttle power as the stock Q jet would. So having said that, your best bet is to send your carb to Everyday Performance or another carb specialist for a rebuild. http://www.everyday-performance.com/quadrajet_carburetors.htm GM spent a lot of time and money to caliblrate each Q jet carb for the application. A Buick 350 will only run right with the correct Buick 350 carb unless you know how to customize a carb internally.
thanks for the info, i will definly give them a call. i am converting to HEI from points and i was thinking of getting a distributor from autozone but i looked in to it and the brand is Cardone.....never heard of it, but i was wondering if it is good..... and if not where could i get a good quality distributor for a resonabale price. Thanks again for the info.
Best reply I can give is to remember the Q-jet was designed by GM for their 8-cyl engines and E-brock, Holly, and Carter were built for multi purpose replacement. Also the Q-jet is 750 cfm and all Buicks I have ever seen like bigger carbs. A big Plus is that the Q-jet is the easiest to rebuild and modify if ever needed. Good luck with which ever you decide. Don (The pinhead name really is the engine........)
Just post a wanted add in the parts wanted section and you should be able to find a HEI for not too much $... Or just order this: http://www.speedwaymotors.com/Pertronix-Ignitor-Points-Eliminator-Kit-1957-74-GM-V8,5399.html
