I have been lurking a long time, but this is my first post.
I have just installed a new 383 from Skip White Performance in my 1927 T roadster and am having some small problems.
Specifications: Long but maybe helpful
Car:
2280# with driver
3.55 rear gear, (Frankland quick change)
26" rear tire
TH350C w/ 2500 stall
Engine:
440 advertised HP using 93 octane premium pump gas
383 SBC
Flat top forged pistons w/ 2 valve relief, 10.8-1 CR
210CC procomp aluminum, 64cc, 2.02/1.6
Howards roller cam:
Lift: w/1.5 rockers .530/.545 (1.6 rockers installed)
Adv dur: 286/294
dur @ .050: 233/241
LSA: 110
Procomp Hi-rise air gap intake
QFT SL-750 carb vac.2ndary
jets 72 front 82 rear
idle air bleed 70/39
hi speed bleed 31/31
pri nozzle 35
needle and seat 110
power valve 6.5
HEI ini 24*, mech 10* total 34* no vacuum advance
Autolite 5224 plugs @ .035
1-5/8 lake style headers into 2-1/2 exhaust in front or rear tires
10-11" Hg @ idle
PROBLEMS:
ROUGH IDLE: White says not to use the vacuum advance. Motor seems to want more advance at idle. Why not use the vac adv to increase the advance at idle.
BUCKING OR SURGING at cruise speed. ???????
HESITATION at hit of throttle. ??????? bigger squirter????
I think I have searched out and read everthing to do with timing on this site. This has been very helpful, but I have had the timing all over the place and have not been able to eliminate the surging or hesitation. It must be in the carb. I am not a very good carb tuner. I know there are a lot of very knowledgable people participating in ths forum. I would appreciate any help you guys can give me Thanks in advance.
Jim
I have just installed a new 383 from Skip White Performance in my 1927 T roadster and am having some small problems.
Specifications: Long but maybe helpful
Car:
2280# with driver
3.55 rear gear, (Frankland quick change)
26" rear tire
TH350C w/ 2500 stall
Engine:
440 advertised HP using 93 octane premium pump gas
383 SBC
Flat top forged pistons w/ 2 valve relief, 10.8-1 CR
210CC procomp aluminum, 64cc, 2.02/1.6
Howards roller cam:
Lift: w/1.5 rockers .530/.545 (1.6 rockers installed)
Adv dur: 286/294
dur @ .050: 233/241
LSA: 110
Procomp Hi-rise air gap intake
QFT SL-750 carb vac.2ndary
jets 72 front 82 rear
idle air bleed 70/39
hi speed bleed 31/31
pri nozzle 35
needle and seat 110
power valve 6.5
HEI ini 24*, mech 10* total 34* no vacuum advance
Autolite 5224 plugs @ .035
1-5/8 lake style headers into 2-1/2 exhaust in front or rear tires
10-11" Hg @ idle
PROBLEMS:
ROUGH IDLE: White says not to use the vacuum advance. Motor seems to want more advance at idle. Why not use the vac adv to increase the advance at idle.
BUCKING OR SURGING at cruise speed. ???????
HESITATION at hit of throttle. ??????? bigger squirter????
I think I have searched out and read everthing to do with timing on this site. This has been very helpful, but I have had the timing all over the place and have not been able to eliminate the surging or hesitation. It must be in the carb. I am not a very good carb tuner. I know there are a lot of very knowledgable people participating in ths forum. I would appreciate any help you guys can give me Thanks in advance.
Jim