Ducati Sporting Club UK > DesmoDue Race Series > DesmoDue - General Questions and Chat > That bleedin' 675 motor :(

[ali]

Well, we've tried our best, but no amount of jiggery-pokery, carb black magic, or hitting it with a hammer will extract any more bleedin' power.

Spent another few hours on Mark Hill's dyno last night without managing to get anywhere, so it's off with the flatslides and back on with the CVs this weekend.

So a word of warning to anyone looking to tweak a 675 for next year, be prepared for a very long, expensive process that may well yield no results.

On the positive side I will be shifting the FCRs to the 900 tomorrow and dropping a tooth on the front, so Brands should be a hoot on Monday!

Cheers,

Ali

[antonye]

So not worth putting FCRs on it then?

I've got a set of FCR39s here which are ready to go on ... as this is supposed to plug the 20% gap in horsepower between the 674 and the 618s ...

[dickieducati]

wont do anything about the 20% gap in skill though.

[antonye]

Originally posted by dickieducati
wont do anything about the 20% gap in skill though.

Heh. I'll remind sir of my highest results, compared to his own. :P

[AK]

Antony - best you come & have a look at the 600 heads & the (albeit knackered) 620 ones that AK has.

Ali was a bit amazed when he saw then last night too!
When they are side by side, you can see the big difference on the inlet & outlet

Porting (Alan thinks) is the only thing that will make them come up to the same performance level - and we arent allowed to do that

C, rapidly becoming an expert in this field.....

[antonye]

Yes, I know the issue is with the ports, but as you say we're not allowed to touch those.

First it was the big-bore. Then it was the carbs. What now?

[fil2]

Originally posted by ali
Well, we've tried our best, but no amount of jiggery-pokery, carb black magic, or hitting it with a hammer will extract any more bleedin' power.

Spent another few hours on Mark Hill's dyno last night without managing to get anywhere, so it's off with the flatslides and back on with the CVs this weekend.

So a word of warning to anyone looking to tweak a 675 for next year, be prepared for a very long, expensive process that may well yield no results.

On the positive side I will be shifting the FCRs to the 900 tomorrow and dropping a tooth on the front, so Brands should be a hoot on Monday!

Cheers,

Ali

The Tweak next year for the 675's will be head work i imagine...which is alot cheaper and more effective than FCR's..

and YOU dont need anymore power ......you are already the lad to beat...........:P

Phil

[fil2]

Originally posted by antonye
Yes, I know the issue is with the ports, but as you say we're not allowed to touch those.

First it was the big-bore. Then it was the carbs. What now?

620 injection................

[antonye]

Originally posted by fil2
620 injection................

Well yes, but that just means I won't be entering next year as I can't afford to buy a 620, and who is going to buy the 674 now?

Money down the drain

[AK]

Originally posted by antonye


First it was the big-bore. Then it was the carbs. What now?

?riders?

sorry, poor show

coat, off.............................