Lambretta small block tuning

[soulsurfer]

...and another in the mix http://lambrettaspares.com/spares/racet ... 0761k.html

Didnt that come last in the small block dyno tests that were done a while back?

Dunno, but I'm sure if set up correctly it'll perform well, Mark's no mug.

[Booby]

Hi Tom
Had my Imola for about the last 8 years, thrashed to death & never let me down. Carb Dellorto 28 phbh cant remember
the jetting as i have never had to touch it sinnce it was on the dyno. Gp 200 gearbox & gearing. Pm Pipe. I have tried
a JL 2 & Jl3 in the past. Neither suited the engine imo. Steer clear of a lightend flywheel, better off getting a indian one
machined.
No problems in dealers asking questions myself if they ride them. Might stop them selling us crap & wrong
parts in the name of Profit

[servetakid]

Never really ridden or built Lammies, only 23 and never really had the money to venture into them, so mostly used to P-ranges, anyway, picked up a nice little tax rebate and sold my PX and have a little spare cash so thought i'd treat myself

Anyway, decided on, with a little help from some others and a quick blap on a mates scoot to go for an Imola, so just waiting for the parts to arrive now

only 23 you get your self on young guns :ninja:

[tom-wsp]

No.

[nellyboyo]

Dai at On Small Wheels did my Mugello 192 with a Jimmers reed valve and it has been great. Taken loads of abuse , ridden flat out everywhere. Any cock ups have always been something stupid thats I have or have not done

[squires]

Dai done a sr200 kit for me, ported and polished and cut 3mm off the piston, i have topped it at 75mph flat out on a straight and it will do 70mph easily and cruise at 65 all day, my engine is a gp150 with li150 box, 46x 15 gearing with 28mm delly and 48mm af clubman, very rideable low down due to the pipe but revs out nicley im chuffed with it and for the price the sr kit is worth considering after a fettle.

[Rich_T]

GT kits will come back in the next month or two, if you're interested contact Gran Sport. They will be a little more expensive but will come with the new head, I'm casting at the moment.

One thing to think about is what I term as the "£ to BHP gain" ratio. This is a simple calculation to work out how much it costs to achieve an increase in performance. It takes 1. true cost of the engine upgrade 2. The peak BHP 3. the average MPG and a base line or reference BHP for the casing size. These figures work in a simple calculation to present which engine modifications deliver best overall performance and where the economical cut off point is for tuning on certain engines (ie the point where paying for tuning work does not return an increase in overall performance).

I find this a very interesting formula and GT kits come out very favourably in it. Some say that I deliberately constructed it to favour GT kits but my response to that is the formula is useful for determining lots of things on ALL kits. If you are interested i'll write it our with some worked examples and how, in a spread sheet, it can be used to pick out specific characteristics or overall performance, what ever floats your boat.

[soullad]

Am interested, sorry Rich.

[soulsurfer]

Hi Rich, are the cylinders the same spec as the original, manifolds, materials etc?

[Rich_T]

I'll write up a description and working example of the formula later.

The new run of GT kits are from the original tooling and to the original specification.