just getting the exhaust sorted on my mini and was thinking of just changing the pipe to 2" but im starting to think that might be to big.. would that be right? the motor is a 1310.

_________________
oil leak?..what oil leak..that puddle under the car is just sweat from all that horsepower

1 3/4

_________________
WD40'll fix it!
If it don't, use a big hammer!

2" is OK on mine (1360) and Chong's (1330) but both these motors are giving 120HP+ at the crank.
A 1310 roady 1310 motor on SUs will be happier with a 1-3/4" system.
RC40 and a Maniflow LCB works good.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Their is not many places you can seriously ask a question like that and still expect a decent answer .

_________________
Respect mine and I'll respect yours.

Well I was going to say not bad if you're a possum or something

But yes, 1 3/4 is plenty up to and including 100bhp. More than that 2" is worth about 5-7hp over 1 3/4 but your intake and port work has to match as well as medium or large bore headers. I'd say do 1 3/4 for more low end torque.

PS. I set a car alarm off the other day (regular occurrence) just by idling next to it, and it was inside a garage and I was outside

_________________
Lillee - 1969 Morris Mini K

most of the girls would probably suggest that 2" is not enough

_________________
No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

I told my wife 2" is big !!

Al

My mate has a 2 inch stainless system on his +110thou 998.
Yes it had lots of work done and a downdraft webber but it didn't kill back pressure at all and it was pulling 92hp atw..
Sounded really sweet aswell!!
I'd go a 2 inch on anything above 1275.
That's my opinion anyway!

_________________
2000 Holden Rodeo TD - The Daily
1998 JDM Mitsubishi Lancer Evolution V -The Weekender
1977 Leyland Mini 998cc, 1293cc in the works - The project
1977 Leyland Mini Van - Sold
1966 Morris Mini Deluxe - Sold
2004 MINI Cooper S Chilli - Sold

92 horse power, u sure?

And mat, 2" wide should be plenty;)

_________________

Well, we are talking diameter .

_________________
Respect mine and I'll respect yours.

A topic posted by TINY morris... about 2 inches.

And the plot thickens!

nah,,, sorry,,, i did type something but i couldnt,, so deleted it

_________________
No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

haha willy, 2" around though lol

_________________
oil leak?..what oil leak..that puddle under the car is just sweat from all that horsepower

I saw the dyno results with my own eyes.
Yea I didn't believe it until I saw it.
207ft pounds of torque aswell!!

_________________
2000 Holden Rodeo TD - The Daily
1998 JDM Mitsubishi Lancer Evolution V -The Weekender
1977 Leyland Mini 998cc, 1293cc in the works - The project
1977 Leyland Mini Van - Sold
1966 Morris Mini Deluxe - Sold
2004 MINI Cooper S Chilli - Sold

Is this guy in tassie? Would love to see how it goes against my low compression n/a 1100cc.

I would be stoked with a 2" width.

_________________