Carter Thermoquads ~ 'More General Information'

Couple of comments, then probably no more from me because we are going round in circles.
- $50/$100 TQs. QJs the same. They are cheap because they were [a] not Holleys got a bad rap when folks left out the O rings out, then ran rich, or misadjusted them [c] are 40+ yrs old [d] 000s were made, so plenty still floating around, hence cheap price. There is a guy here, Pro Carbs is the name I think, refurbishing 9000 series 800 CFM Ford carbs for $975....& that is Aussie dollars! [ $US1390 ]
- there is more than one way to skin a cat. The RayR post was very interesting & informative but a LOT of important info missing. He 'thought' it had a purple cam....but purple cams do not make 18" at idle? No mention was made of T slot position, which is the foundation of tuning the idle cct. I do not believe the pri ABs need touching at all to dial in these carbs. What I believe would have fixed Ray's cruise mixture was enlarging the economizer by about 0.004". The idle jet controls fuel only; the Ec controls the volume of mixed air & fuel that gets delivered to the T slot. This would have changed the T slot/idle cct balance & re-aligned things, As I alluded to earlier in this thread, the Ec is hard to get access to, & requires long drill bits; most people wouldn't know where it is. I cut open an air horn to find it. T slot length has a bearing on mixture ratio; a short T slot is rich, long slot lean.