2.5L Rocket Stroker Engine Kit with 6 Speed Transmission (R&D)

[R-III-R Turbo]

Stage 1 prototype initial testing;

 

[Grumpy Ole Codger]

So, one has to ask the eternal question. What are the expected performance figures? Obviously it will only be a calculation at this stage but it has to be foremost in pretty much every ones mind!! I, personally bow down to your superior knowledge and ingenuity and will await a slap up side the head or two for asking silly questions

 

[R-III-R Turbo]

So, one has to ask the eternal question. What are the expected performance figures? Obviously it will only be a calculation at this stage but it has to be foremost in pretty much every ones mind!! I, personally bow down to your superior knowledge and ingenuity and will await a slap up side the head or two for asking silly questions

• • Calculated to run 2200rpm at 80mph
• • Theoretical top speeds are (wait for it!) 225mph @ 6300rpm,,, or 320mph for 9000rpm engines

 

[Grumpy Ole Codger]

Oooo I consider myself slapped! That's pretty impressive! What's the hoped for reality?

 

[IMFASTTOO]

Stage 1 prototype initial testing;

YES looks good I worked at STRANAHAN GEAR for 4 years MADE a set of gears for the VINCENT BLACK SHADOW

 

[barbagris]

Calculated to run 2200rpm at 80mph

That'll do very nicely for the long runs. Should up range between stops to acceptable.

Overall reduced RPM - reduced stress

As long as it's not engaged at low rpms - otherwise the motor is going to "lug" a lot. I'd not risk it below 1750 and really not below 2000. Very much an overdrive gear (imo).

I want it!. The bummer is going to be that I won't be able to afford it. Because it would make sense to undercut and do other stuff at the same time. And the plane tickets for @Claviger @R-III-R Turbo @warp9.9 and @Neville Lush are going to be a killer.

 

[Joesmoe]

@barbagris Get with the times my friend -- telemedicine --> Telerocketmods

And I bet, had this been available, much of the 130,000 miles posted by @idk would have been in 6th.

 

[IMFASTTOO]

That'll do very nicely for the long runs. Should up range between stops to acceptable.
As long as it's not engaged at low rpms - otherwise the motor is going to "lug" a lot. I'd not risk it below 1750 and really not below 2000. Very much an overdrive gear (imo).

I want it!. The bummer is going to be that I won't be able to afford it. Because it would make sense to undercut and do other stuff at the same time. And the plane tickets for @Claviger @R-III-R Turbo @warp9.9 and @Neville Lush are going to be a killer.

I spend a lot of time cruising in 4th gear where we ride only on the highway for short periods and 5th gear is all I need but if I was riding open highway everyday all day it would be useful

 

[R-III-R Turbo]

Oooo I consider myself slapped! That's pretty impressive! What's the hoped for reality?

Calculations done a while back indicated ~27% reduction in engine RPM while maintaining the same road speed, going into 6th from 5th.
As in ~2200rpm down from ~3000rpm, at ~80mph.

The only practical means available so far is the 3D printed plastic gears in the video, where the input speed is ~73% of the output speed, so this initial practical test is consistent with the calculations.

I forgot the laser tachometer so RPMs are just from counting revs (blue tape!) per second by stepping through the footage frame by frame in a video editor program. That and the transmission was being spun with a handheld battery drill, so the input speed could vary slightly.
Hence the "approximate" RPMs and %'s!

Because it would make sense to undercut and do other stuff at the same time.

The plan is - if it works and is reliable, that is - to make the kit available in 2 levels of "trim";

(1) Standard 6th gear kit - base kit of what's needed to have the 6th gear

(2) Premium 6th gear kit - Complete Transmission Upgrade - includes undercut dogs, deepened & widened circlips, billet replacements for the weaker gears, improved dog meshing from a selector drum upgrade, and also comes with all the OEM/Triumph consumables like gaskets, oil, circlips etc needed to do the upgrade.

 

[Grumpy Ole Codger]

Calculations done a while back indicated ~27% reduction in engine RPM while maintaining the same road speed, going into 6th from 5th.
As in ~2200rpm down from ~3000rpm, at ~80mph.

The only practical means available so far is the 3D printed plastic gears in the video, where the input speed is ~73% of the output speed, so this initial practical test is consistent with the calculations.

I forgot the laser tachometer so RPMs are just from counting revs (blue tape!) per second by stepping through the footage frame by frame in a video editor program. That and the transmission was being spun with a handheld battery drill, so the input speed could vary slightly.
Hence the "approximate" RPMs and %'s!

Well done Sir! That's impressive regardless of all the variables. It will still, in reality, be a vast improvement across the spectrum.