Franspeed Race pipe Test & Review....

[joespeed]

interesting text to accompany the dyno
you said the franny race has the best power curve but if a customer wants to make his high tuned engine more sedatehe can put an ADS tourer on and raise the gearing.

Yes, meaning that in this application on a fast-touring engine (the Avanti) in my opinion, the pipe labelled 'tour' (ADS) is not the best choice, in my opinion, the pipe labelled 'race' (Franspeed) is the best, as it has practically all of the low down curve of the ADS, but also an additional 1000rpm and 3bhp on tap if required, and both should pull similar gearing.

However, on reed-valve engines which have been taken to a high state of tune, and where the customer wants to 'tame' that engine and have something very low revving, which pulls gearing rather than revs......the ADS works very well to do accomplish that. I find the ADS Tour pipe a bit of a one-trick pony in that respect, although it does perform that one trick very well. However, i feel the point i was making has been missed in this respect, i was more interested in the fact that many customers would overlook the Franspeed pipe for the Avanti as they may be put off by the word 'race', and instead choose the ADS pipe because its called a 'Tour' pipe....when in fact, i feel the Franspeed actually suits the Avanti kit better. Thats all.

looking at the dyno above does the slight increase in bhp/tourque in the mid range of the ADS justify changing from a franspeed race and loosing the top end

No....not in my opinion, others may disagree. But i feel that slight mid range difference will rarely be actuall felt on the road (in real terms) and the Franspeed catches the ADS up 200rpm later on anyway, but has much more to give at the end of the rev range, which is still a very low 6900rpm!

is andy with you during the tests ,maybe he would be able to tell us the better of the pipes on the road tests.i think the slight dip in the middle will be so slight you will not notice with the extra at the very top of the rev range.

[Darrell Taylor]

what ignition system is fitted ?

[mickdale]

thanks for sharing the graph and opinion drunkmonkey
seeing the back to back dyno results is worth its weight in gold when it comes to pipe choice
cheers
mick

[Andy Pickering]

is andy with you during the tests ,maybe he would be able to tell us the better of the pipes on the road tests

No Joe not all pipe tests, time is tight for me at the moment , I shall be running my PM25 for running in as moneys also tight at the moment which is a real shame with the figures the franspeed has shown up , the scooter is ready for me to pick up now so I just need to find the time and a van to get up there and pick it up but rest assured its going to be doing some miles this year and if you see me at rallys please feel free to pick my brains on the ride there and any feedback I can give to potential buyers of this kit.

what ignition system is fitted ?

Its running a standard 12 volt electronic kit with augusto 8000 Darrell..

At this point I would like to thank both Dan and Sean for there hard work and efforts on this work and feel little embarrassed by the amount of engine upgrades these 2 have put in FOC as my engine was a little tired after 3 years of work, general and rally use so Thanks guys..

[drunkmunkey6969]

No problem Andy, time is tight for us all, and there are so many options and variants we'd love to continue to test and report on too.....but sadly its just not possible from a time/money perspective.....but we try to do as much as we can to give the 'main report info' so people that read our forum get at least the basic info, to help them make more informed choices.

And also, although we spend a lot of our time and money on these tests/reports, I also gotta say a big thanks to people like Ron Moss and Andy Francis who provide us with these kits and pipes on loan, as without that kind of support we couldn't bring this kind of info to others. We hope it works out to everyone's benefit in the end.

Sent from my HTC Sensation using Tapatalk

[sideout]

Dan,
Excellent report on the exhausts, well done! I'm sure everyone on the forum appreciates the effort that's gone into doing this work.

I've just been on Andy Francis' site and there is a whole lot of Franspeed exhausts available. Your test concerns the Franspeed Race (JL4 equivalent?), I see there are also Franspeed Avanti 3 Race and Franspeed Avanti 3 Touring variants. Where do the latter two fit in compared to the ones you've tested?

Cheers
Nigel

[Darrell Taylor]

whats also interesting is the perception that a box pipe is a safe choice especially for touring yet i generally find there normally the highest revving pipe due to there short tuned length
the last scootering test on pipes shows a different tale with how these pipes perform with 185 degrees of ex duration on a ts1
this test shows how a short pipe(fran) can extract power and rpm from low durations of around 176 on the avanti ,exhaust designers should specify the ex duration for there pipe but as a general rule most pipes appear to be designed around ts1 type durations in the mid 180,s as Dan points out the name assigned to the pipe isnt neccessarily a guide to its characteristics especially when combined with different port specs/cylinders
the reason i asked about ignition is that when a curve is used it plays havoc with test results on pipes which can make for an unfair comparison