Hi guys I used to run the plus 21 4 in 2009 with my Losi 2.0 buggy and it screamed. I'm getting back into it again and buying the Losi 4.0 and I'm looking at the Keep Off 21-4 and not sure which pipe to get either the 9901 or 9886 with the 41021 manifold. I want lots of bottom end for clearing jumps but I want top end for long straight aways.
A friend keeps telling me to get the SH PT-2016 xbg, but I know nothing about the SH motors and I remember how great that Novarossi engine ran and I'm reluctant to buy something I don't know anything about even though it's cheaper.

Thanks

A 41021 will give you the mildest power , a 41033 will do better as would a 41001

Maximo, how would the werks 2058 compare to the mentioned nova combos? I've got the 2058 on my keep off 21-4 and really like it!

And which pipe for the Losi 4.0 buggy. 9901 or 9886?

Also is a 3 needle carb harder to tune than a 2 needle carb.

And what's the difference between steel and ceramic bearings? Which is better for longevity?

Guys got a question on pipes? I run a mito 4 and was wondering what is the difference between and ultimate pipe and the novarossi based pipes? Is the ultimate 2123 a mimic of a nova pipe? Has anybody tried an ultimate pipe on a mito 4?

I run keep off 4 with 41021/9886 and it has all the power it needed especially short run up to jump, excellent top end with 6.5mm venturi.

4bttwc 41033/2096 smooth n better top end. As for 9901/41021 combo is very flat on top imho.

Ceramics will give better response n longevity, main bearing only.

3 needles carb will tune the same as the 2 needles carb, just dont tune the mid range if u dont understand how it works. I dont feel/find any difference with both carbs

In buggy I run the Keepoff 4 with the 9901/41021 manifold. It's a great engine and I agree with you stick to Novarossi! The 9886 pipe is not allowed in my region as it's a 2 chamber pipe. The 9901/41021 combo is what the NR team drivers such as Adam Drake run in buggy.

So nobody knew the comparison between the ultimate pipes and the novarossi pipes?

Never even heard of it here.

Not sure but novarossi based engines wont have much difference

Answer by Novarossi
 

Hy, This is the response of NOVAROSSI Italy with regard to the question on the last connecting rod commercially available.

can you translate this reply to english please?
would like to see what novarossi have to say
as they did not give a reason why my rod failed.

I don't know why they don't answer you..I wrote Nova and my question related only to know the latest rod produced. Sorry, I don't help you.

Aulin79 pretty much explained it, he messaged Novarossi just asking about what the current batch of r7 conrod numbers are and they replied with a number that's pretty much it

thanks, got it now i was thinking the writeing in blue was reply from novarossi