Wouldn't this be a good time to introduce the idea of upgrading from
carburetors to programmable electronic fuel injection? I can't find the
posts in my history file (I may have purged them) but I seem to recall
some discussion in the past on this subject. I know that there are some
units on the market that can be programmed with an old PC (386?), which
seems like a good alternative to fiddling and fussing w/jets, needles,
etc. (and BTW, finally something a PC is good for!).
How about some commentary (ease of use, cost comparison, performance,
etc.) from anyone who has had experience with these systems, whether on
a Roadster or another, lesser, vehicle?
Gary McCormick
San Jose, CA
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Jim Tyler wrote:
>
> [snip]
> This is one of those discussions that has no end. It is true that SU's
> (IN GOOD SHAPE) are very good carbs. However there are some fundamental
> limitations and Solexes are better in many ways.
>
> Solexes are far more tuneable than SU's and they (if in good shape)
> stay tuned much better than SU's. One you select the jets you have
> set the mixture and it stays the same for the most part. SU's are
> not quite that forgetable.
>
> You can also modify performance at different RPM's easier with Solexes
> w/o affecting other performance much. (you can modify the Idle
> jetting w/o changing main jetting) With SU's the two are
> joined at the hip, you have to start experimenting with needles to
> get serious about it. Any serious effort in this area is MUCH more
> intensive that rejetting solexes.
>
> Our SU designs suffer from poor shaft design (and metallurgy).
> Scott a Z-therapy may have the best solution for this (real shaft
> bearings and seals). Solexes don't have a big problem
> with this.
>
> SU's are great carbs, but Solexes are excellent as well.
>
> Jim Tyler
> Topless Datsun
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