CSI ignition on a TVR 2500M

[Xadeb]

Hello,
Does somebody already install a "CSI" distributor on his 2500M ?
I did it last week as the original distributor was defect.

I'm looking for the best position/curve ?

Thank you in advance !
Xa

[Xadeb]

Hello,
I received from CSI the curves related to the Triumph TR6/250/5 engines.

With a standard engine, CSI recommends :
"An advance of 10 degrees from idle speed and a maximum advance of 30 degrees."
"You can try 4 and 8 first."
"With somewhat higher compression ratios, the max. Advance should be less, the curve 1,2,3,5,6 or 7 is intended for that."


Questions to the members having experience with the tuning of elec. ignitions (not my case...):
- What's a low/high compression version ?
- Which types curves I should test first ? 1..4 or 5..8 ?
- Do you think that these 2 types of curves are so different ?
- Do you think that the curves 5-8 are more critical for the engine (at long term) ?

"At low compression values "American versions" the advance can be more (curves 9,10,11,12,13,14,15 or 16)"
Apparently not advised by CSI for my case... but why they mention "American versions" ?


Thank you in advance for your support

[Holmgren]

Hi
Which curve Did you end up with? I have an TR6-74 us and have curve 8 now

[TVR by BVR]

All US Tr6 engine are low compression, use the highest octane fuel you can get, ignition timing with a STD camshaft between 10-12 dgrs don't go higher than that because the engine will start to ping.

[Holmgren]

Hi
Do you think its wrong with curve nr8?

[TVR by BVR]

It is very simple, drive the car till the engine is on temperature, go full throttle in let's say third and fourth gear if the ignition doesn't ping go a step further and repeat the procedure till the ignition pings and than you go one step back that way you will have the maximum curve available.

[Mercdriver]

I had a 2500M in the 90’s with American spec engine. P1$$ poor performance!

Look at a TR6 head, near the front of the head is a web in the casting and compare it to your head. The difference if I remember is about a mm. either bin your head and get a TR6 head or have a machine shop remove material from the head to make it a TR6 one.

I did the above, fast road cam and twin SU’s, electronic ignition garage reckoned it was good for 170bhp at flywheel.

Are there no triumph specialists where you are?