Carpet small track(ours)

[lesbaldry]

Food for thought

Having ran both Stock spec and old skool ISTC speedos on our small indoor track I think the "old skool" type speedo is better suited...using same motor the ISTC gave more punch especialy in stock......I wonder how many will now be digging out our old speedos for sunday to try ;D

[Martin Young]

Nov 26, 2009 9:53:03 GMT @lesbaldry said:

Food for thought

Having ran both Stock spec and old skool ISTC speedos on our small indoor track I think the "old skool" type speedo is better suited...using same motor the ISTC gave more punch especialy in stock...

I would agree with this statement when running indoors on a small track. I would also go one step further and say I run less timing indoors and gear accordingly.

[oldtimeracer]

Interesting. Is that because the "new" speedos give more top end and less bottom end then? More top speed but less punch.

Would you not be able to gear down more using the "new" speedos to take advantage of this or does that defeat the object.

[lesbaldry]

Ian I must admit the only times I found the ISTC lacking was on large flowing tracks that need plenty of "top end"(Aldershot,C,wolds,ADUR)

At Bashley I always preferred the ISTC on mid punch and slightly over gear the motor (talking 17.5 here)
Ive tried dropping the punch and gearing up with the stock spec too but its doesn't seem to have the same affect...one things for sure Ive found it harder to find a "sweet spot" with the stock spec.... a very fine line between go or blow especially with timing adjustable motors ;D 1350gm should make life easier though.....cue Pete

[Reuben]

I dont know about indoors, but at Bashley outdoors for 17.5 I always found that I needed to add a little timing to the motor to increase acceleration. However whether this is the same as punch, or you are just getting to the same top speed faster, im not sure. But running with my duo at 4.6 and zero timing, the motor seemed flat. but then moving the timing to the middle hole and the motor seemed to come alive on the infield and straight. But then as you said Les, adding timing and using stock spec to get the best punch is definitely a Go or Blow, as the temps start rapidly increasing when you gone to far.

Maybe the stock spec has to-much timing to be able to efficiently power the motor at a decent speed/punch indoors on a small track?

[lesbaldry]

Reubs as you know I have played and fiddled with most makes of 17.5 to find the best but to be honest the Trinity proved to have the best of both worlds(punch/top end) and the easiest to make work..too date!

Have you tried the 17.5 Trinity(EA) coupled to a ISTC?...ie motor on max timing but speedo on mid punch with a lower ratio (low 4's???)

[Reuben]

I did before I had the stock spec and yes there is a lot more punch available, from what i remember, especially from the start line. So in theory, it would be much better indoors.... so now you got me thinking.... Sunday, change motor, or just put in an already paired up ISTC and Trini from my cyclone..... hmmm

[Jazzler]

Its funny you mention this, I had the same thoughts recently.. And think I mentioned it to a few people too..

I honestly think that indoor, a properly geared motor / gen2 esc combo is is as good, if not better than a gen3 speedo. Simply because they seem to offer much more low down punch, and can achieve the same top speed by the time you need to brake for the corder.

Having said that, I'm not going back to my old esc just yet, as my stock spec seems to do just fine in 17.5 indoor at the moment.

[lesbaldry]

Nov 26, 2009 13:01:55 GMT Reuben said:

I did before I had the stock spec and yes there is a lot more punch available, from what i remember, especially from the start line. So in theory, it would be much better indoors.... so now you got me thinking.... Sunday, change motor, or just put in an already paired up ISTC and Trini from my cyclone..... hmmm

Hmmmm me thinking too,I might just try it,either way Ill stick to the ISTC for sunday,we're all close on pace so it should be a good "fun" test sesion....might even get the schuy out to play!

Put it this way I ran a 13.5,stock spec in the Cyclone for one qually but 17.5,ISTC in the Photon for the finals last night ,Ok the Photon is a better handling car but the power delivery felt just as fast

[yellowshark]

Nov 26, 2009 10:03:47 GMT @oldtimeracer said:

Interesting. Is that because the "new" speedos give more top end and less bottom end then? More top speed but less punch.

Would you not be able to gear down more using the "new" speedos to take advantage of this or does that defeat the object.

Don't see why not Ian. I have an old 7.2 litre Vette. Manual box but so much torque if I am feeling lazy I drive it like an automatic and pull away from lights in top gear. It has the standard 3.52 diff. Put a 3.79 diff in and you loose 20mph off top speed but you only have to caress the throttle and smoke pours from the rear tyres. Its the opposite way round to your point but the same principal must apply I am sure.

[yellowshark]

Following several months of extensive indoor testing we are going to run the Nosram 17.5 with timing down to zero. FDR of 7.45 and the Pearl at 4. Interesting points on the ISTC but not sure if I can be naffed with swapping the Pearl out though. Could run the 008 (with its ISTC) but that is still at 1420gm

[Reuben]

Pete, I am unsure as to why you havent praised the Pearl for indoor racing after all the testing, surely with the Pearls non on the fly timing features and upgraded ISTC software giving more punch and therefore the far superior esc for our little track. And im not taking the pee either. The Pearl may be the esc of choice for our little track???

[oldtimeracer]

Thank goodness I am running a Mini. Don't have to worry about all this just stay full throttle the whole race ;D

[yellowshark]

Never run the Pearl indoors Reuben. Come to that never run an XRAY indoors either so Sunday will be a journey of discovery

[lesbaldry]

Pete....You missed an outstanding meeting

Speedos...for me motor for motor my ISTC did have more bottom end punch compared to the stock spec on our small track..it was also less hassle to tune "temp wise"

[yellowshark]

Nov 30, 2009 7:57:01 GMT @lesbaldry said:

Pete....You missed an outstanding meeting

Speedos...for me motor for motor my ISTC did have more bottom end punch compared to the stock spec on our small track..it was also less hassle to tune "temp wise"

Really pleased to see it went so brilliantly well for Iain and his family guys, well done. Gutted Les that we weren't there, all packed and ready to go Saturday night; irrelevant and boring story as to no show.