Post by Admin on May 7, 2020 15:06:57 GMT -5
Holley 4 barrel LIST-4698 - 1343 (May 1973), PMB # 2276
Presently on my car... '86 Mustang convertible, fresh 306 SBF, ~9:1 CR, 218-degrees @ 0.050 intake duration camshaft, Performer RPM, ported E7TE cylinder heads, BBK shorties and h-pipe...
OE info:
- C9OF-9510-R / C9OZ-9510-N (service replacement for '69 Ford small block - a Ford performance offering)
- dual feed bowls
- PMB/SMB 6698/4841
February 19, 2020:
- removed choke blade...
- measured air bleeds and other...
February 20, 2020:
- cleaned main body...
- drilled and tapped for 8-32x1/8" PMAB's and 10-32x3/16" PIAB's...
- drilled and tapped for 10-32 choke vacuum block/bleed...
- drilled and tapped for 6-32x1/8" and blocked TS bleeds into bores...
- drilled for and installed brass sleeves to block IMS bleeds into bores...
- drilled and tapped 6-32 for PMB IFR's, and PMB booster air correction bleeds 0.028"...
- created SMB (epoxy dual angle booster feeds, create new single angles), that has up high IFR's - drilled to 0.031"...
February 26, 2020:
- cleaned main body and blew all out...
- painted MB's satin black to match base...
- installed into MB's and fresh air hole, cup plugs...
- (to have manual choke later - block choke vacuum)...
- created and installed 6-32x1/8" 0.026" PIFR's...
- created and installed 10-32x3/16" 0.070" PIAB's...
- created and installed 8-32x1/8" 0.031" PMAB's...
- secondary idle ~1/4-turn open...
- primary idle TS's squared...
- IMS's ended up at about 3/4-turn out...
- runs good, sorta lazy transition...
- increase PIAB's...
It's present calibration:
Working pretty good. More super-tuning required when I get time...
Presently on my car... '86 Mustang convertible, fresh 306 SBF, ~9:1 CR, 218-degrees @ 0.050 intake duration camshaft, Performer RPM, ported E7TE cylinder heads, BBK shorties and h-pipe...
OE info:
- C9OF-9510-R / C9OZ-9510-N (service replacement for '69 Ford small block - a Ford performance offering)
- dual feed bowls
- PMB/SMB 6698/4841
February 19, 2020:
- removed choke blade...
- measured air bleeds and other...
February 20, 2020:
- cleaned main body...
- drilled and tapped for 8-32x1/8" PMAB's and 10-32x3/16" PIAB's...
- drilled and tapped for 10-32 choke vacuum block/bleed...
- drilled and tapped for 6-32x1/8" and blocked TS bleeds into bores...
- drilled for and installed brass sleeves to block IMS bleeds into bores...
- drilled and tapped 6-32 for PMB IFR's, and PMB booster air correction bleeds 0.028"...
- created SMB (epoxy dual angle booster feeds, create new single angles), that has up high IFR's - drilled to 0.031"...
February 26, 2020:
- cleaned main body and blew all out...
- painted MB's satin black to match base...
- installed into MB's and fresh air hole, cup plugs...
- (to have manual choke later - block choke vacuum)...
- created and installed 6-32x1/8" 0.026" PIFR's...
- created and installed 10-32x3/16" 0.070" PIAB's...
- created and installed 8-32x1/8" 0.031" PMAB's...
- secondary idle ~1/4-turn open...
- primary idle TS's squared...
- IMS's ended up at about 3/4-turn out...
- runs good, sorta lazy transition...
- increase PIAB's...
It's present calibration:
Working pretty good. More super-tuning required when I get time...