Testing with TD GPS/Dragy

[SideHogger]

TPAY243, New secondary with machined shaft at 4 mm. It is flush with shaft at full shift with belt in it, no spring.

 

[1nc 2000]

TPAY243, New secondary with machined shaft at 4 mm. It is flush with shaft at full shift with belt in it, no spring.

Did you put clutch on the secondary shaft and make sure it doesn't hit bearing mount at full shift when set to proper offset?
This is must to do also.

 

[DMCTurbo]

I machined mine 3mm. With the spring out/helix in and the clutch fully open I have ballpark .5mm between the clutch and the spacer. It's tight.

 

[SideHogger]

Did you put clutch on the secondary shaft and make sure it doesn't hit bearing mount at full shift when set to proper offset?
This is must to do also.

Yes, believe me, I’ve tried everything to make sure nothing is going to happen when at full shift on secondary. Including putting on shaft to see if it will hit anything at full shift and all is good. I value what guys on here advise you to do(Knapp ,1nc200, DMCTurbo, Ramsoair, Thunder Products, and others) so I always try and do the things they recommend and so far everything looks good. I am also retired so this helps being able to test everything recommended.

 

[DMCTurbo]

Played around on the lake today testing 3 secondary springs, stock yellow, dalton black orange gen 1 and Ulmers red.

Setup as follows;
TD 290 tune
Dalton black-bronze primary spring
Qay70s @77.4 grams
Stock 35 helix
8JP
24-37 gearing

All my passes very very close but the best passes were with the Ulmer red @ 9-1 and the dalton black orange @ 6-2.

Ulmer red @ 9-1

Dalton black orange gen1 @ 6-2.

What I found interesting and maybe someone knowledgeable can chime in is the 660' and 1000' speeds were higher with the 24-37 gearing than they were with the 22-37 gearing yet the 22-37 hit 130mph 200-300' faster than 24-37.

I tried the black orange gen 1 @ 6-1, 6-2 and 6-3. The Ulmer red @ 9-1 and 9-2 and the stock yellow at 3-3.

I'm swapping back to 22-37 now and looking forward to see what speeds the Ulmer red will give me.

My rpms were a tad high at 91-9200 so I'll need some DTYA1s with I think 79 grams or so.

Boost was steady at 18 PSI give or take.

 

[74Nitro]

Played around on the lake today testing 3 secondary springs, stock yellow, dalton black orange gen 1 and Ulmers red.

Setup as follows;
TD 290 tune
Dalton black-bronze primary spring
Qay70s @77.4 grams
Stock 35
24-37 gearing

All my passes very very close but the best passes were with the Ulmer red @ 9-1 and the dalton black orange @ 6-2.

Ulmer red @ 9-1
View attachment 159232

Dalton black orange gen1 @ 6-2.
View attachment 159233

What I found interesting and maybe someone knowledgeable can chime in is the 660' and 1000' speeds were higher with the 24-37 gearing than they were with the 22-37 gearing yet the 22-37 hit 130mph 200-300' faster than 24-37.

I tried the black orange gen 1 @ 6-1, 6-2 and 6-3. The Ulmer red @ 9-1 and 9-2 and the stock yellow at 3-3.

I'm swapping back to 22-37 now and looking forward to see what speeds the Ulmer red will give me.

My rpms were a tad high at 91-9200 so I'll need some DTYA1s with I think 79 grams or so.

Boost was steady at 18 PSI give or take.
View attachment 159234

Looking good, I think if you can hook up better you will be very close to your 130mph target. Looking at the G chart, you are struggling for traction until 25% into the pass.

 

[DMCTurbo]

Looking good, I think if you can hook up better you will be very close to your 130mph target. Looking at the G chart, you are struggling for traction until 25% into the pass.

Yes you are probably bang on. I could feel my new track stretch the more passes I did so it needs to be tightened some too. Overall pretty happy. Its hard to gain once your at those speeds.

 

[Fleecer]

Ultimax XS 825 belt or 8JP?

 

[74Nitro]

That little bit of loose snow can play a big part in speeds. Head out at daybreak tomorrow with things froze up, you may be awfully close to 130.

 

[RAMSOMAIR]

and drop that front end waaaay down, good for 2mph.

 

[Turboflash]

Higher gear = less torque to track at line = less track spin with price being paid (slower acceleration) once traction is gained.
Lower gear spins more at hit but once traction is gained, accelerates at higher rate than 24/37 to achieve higher speed in less time.

 

[DMCTurbo]

Ultimax XS 825 belt or 8JP?

8jp

 

[DMCTurbo]

and drop that front end waaaay down, good for 2mph.

I'm going to start playing with suspension a little more now. Drop the nose and maybe pull the limiters a hole or 2. I think I'm at the 2nd hole now.

 

[Sledroll]

8jp

wouldn't switching to a XS825 bring the rpms down to 8900+/- ?

 

[DMCTurbo]

wouldn't switching to a XS825 bring the rpms down to 8900+/- ?

Apparently but I don't have one.