I was wondering the same thing!!!
I'm much better with Holleys, so I reckon I could get the mixture closer to perfect with a Holley.
Fumes much nicer using racing fuel!
I was wondering the same thing!!!
I'm much better with Holleys, so I reckon I could get the mixture closer to perfect with a Holley.
Fumes much nicer using racing fuel!
Vans.... This is the 2nd time round the block, 40 years later! talk about turning back the clock!
I was wondering the same thing!!!
I'm much better with Holleys, so I reckon I could get the mixture closer to perfect with a Holley.
Fumes much nicer using racing fuel!
Vans.... This is the 2nd time round the block, 40 years later! talk about turning back the clock!
[QUOTE=Innuendo;66853]Do you seriously believe that?[/QUOTE
Yep. Rochester atomises fuel much finer than a Holley .
Not MY one!!!!
Vans.... This is the 2nd time round the block, 40 years later! talk about turning back the clock!
Hollys fail emissions test a lot,Rochesters are far bettter to run.
Cheers Kiwivan
It is not about the journey,It is the style we travel in!
They atomise better because there is greater airspeed through the primaries at low to mid throttle. Higher airspeed = better atomisation and conversely better throttle response (one of the reasons a 2bbl 253 is often quicker 80-100 km/h in second than a 308 4bbl in an equivalent chassis). When the revs get up the 4bbl comes into its own.
Have seen plenty of people remove their quaddy off their 308 everyday driver (I've done it myself) and fit a 600/650 Holley, only to return at a later stage to refit the quaddy. They are a fairly well suited carb for the 308 as long as they are set up right. The small primaries work well for economy around town and the cavernous secondaries are good enough to feed a 400 small block. They flow in the region of 750CFM (in the Australian ones), there were some larger ones fitted in the 'States that flowed 800CFM which are identified by a slightly different venturi and progression port design.
They really only start to get stretched on a Holden engine when you start looking at a cammy, ported VN headed 383ci. But take it to a bloke who knows exactly what he is doing with them and you'll never have another problem with them.
(Hint): if your running one you intend on keeping for a long time, hunt down a few spares for them NOW. Secondary Vac brakes (common issue) are getting very hard to find as I'm not too sure they are still making any in the 'States anymore.
Nunc est bibendum...
In laymans terms . Holley and tailgate open equals eyes watering and headache after a while. Rochester no so much. There are some 10 sec quarter mile rochester quadrajet cars
Last edited by adam perth; 04-09-2013 at 09:41 PM.
There is nothing wrong with a Q-Jet but equally the same is true of Holley carbs.
It comes down to tuning and whether you know how to tune. People who bag one over the other simply don't know what they are doing.
I disagree . Show me a Holley that gives 25 mpg on a 350 chev or 308 with no dead spotsOriginally Posted by Innuendo
A 450 4 barrel would have to go close to that
There are currently 1 users browsing this thread. (0 members and 1 guests)
Posting Permissions
Reply With Quote
Bookmarks