Hi Guy's,

I have open neck versions of both the above and am trying to figure out the relative merits of each of them before having the mota remapped. Has anyone got any info or experience regarding the differences in performance between them?

Mota is a P1 with various other mods.

thanks in advance,

Steve.

 

A 3 inch downpipe should let the exhaust gases escape easier. It should have a better flow.

 

Its not 3" straight through, reduces to 2.5" at centre section, ScoobySport version. The other is 2.5" straight thru'.

Anyone?

Steve.

 

Cant help Steve but may have a buyer for whatever one you dont want

Drop me a text

 

3inch would be better imho..

 

If going 3" go 3" all the way - downpipe with NO drop to 2.5", and 3" centre and rear.

Then, if not getting new 3" throughout d/pipe, and choosing d/p, 3" to 2.5" may be ok for mid power motors, a bit better than 2.5" d/ps but the drop down may not help peak power. Not sure if it benefits spool up or torque, midrange etc.

What power you running looking to run? Seems 3" is best for 320/350 ish engines. #

Just passing on some comments I have had for my car setup!

 

Will do Mr Askew, thanks.

Vulnax999, thanks for that.
Mota is already fitted with 2.5" decat centre & back, I added the 3-2.5" d/p some time ago. It increased the bhp but seemed to drop torque which I've since struggled to recover despite other mods. Looking for 310-320 lbs/ft & 330+ bhp after remap.
Not knowing what merits are claimed by the manufacturer are for the 3"-2.5" d/p I'm hoping someone on here can help.

At the moment I'm running 2.5" straight thru' and it 'seems' a little slower on spool up, but that could just be me!

Anyone else any thoughts?

cheers,

Steve.

 

bttt

 

I think the strangulation mentioned for the 3" to 2.5" is a bit out dated now...

Believe over 400bhp has been run with a 3" to 2.5" downpipe and 2.5" system..

With the right turbo of course!

Simon

 

Thanks for your input Simon, its appreciated.

Does anyone have any views about advantages of the "3-2.5"? ie does it allow faster spool up, have less initial flow resistance etc than the straight 2.5"?

Steve.

 

There has been talk of the reduction to 2.5inch helps spool up but I have no proof of this and have only ever run a 3" to 2.5" and the standard downpipe on my car.

 

Thanks again Simon!

I currently have a 2.5" version fitted, car is booked for remap late August and this question is niggling me. I want to make sure I have the best option fitted for next month. I've just emailed Scoobysport with the question, will let you know what they say!

cheers,

Steve.

 

You might have a long wait emailing Scoobysport..

They are in change of ownership and business etc..

I'd ring H&S (Hayward and Scott).

A 3" will release more power and if you have the money to spare then go for it but you should be able to get the power you want with the 2.5inch.

Simon

 

Will do