Thanks all.
Dave, you mentioned that test to me previously and I tried it out. It made no difference, oddly enough, but increasing the mixture did help.
I tried the richer needle but the carb was definitely too rich then.
I was going to lean the mixture off and also try other needles, however, testing is on hold as my car was making an odd noise on tuesday night. Sounded like the exhaust was blowing so I need to take a look at that and make sure it is nothing more serious.
Thanks again,
Andrew.
My 948+ build
Re: My 948+ build
Andrew
1957 A35
1957 A35
- Neil Evans
- Posts: 12179
- Joined: Tue Apr 15, 2008 1:06 am
- Committee Role: Technical Officer
- Location: Boston, Lincolnshire
- x 11
- x 25
Re: My 948+ build
My experience is that most SU's have thicker oil in the damper than that recommended by the manufacturer...Big Daddy wrote:Sounds like transient under-fuelling. Could this be improved by changes to damper spring rate and/or oil viscosityDave Clark wrote:It went fine, as far as I could tell , but I soon discovered that if I was going for an overtake or a fast take off it went a lot better if I pulled the choke out, returning it progressively as the revs came up.
Club Technical Information Officer
A30/A35 Club Member A191 (since 1972)
Father of the club's only love child
A30/A35 Club Member A191 (since 1972)
Father of the club's only love child
Re: My 948+ build
I believe higher viscosity damper oil will enrich transient fuelling (ie during acceleration). Any comments from the SU gurusNeil Evans wrote:My experience is that most SU's have thicker oil in the damper than that recommended by the manufacturer...
-
- Posts: 5896
- Joined: Mon Apr 21, 2008 1:00 pm
- Location: High Wycombe, Bucks
Re: My 948+ build
Thicker oil and stronger spring very useful in avoiding transient weakness on my turbo engine.