Centre Main Straps
Turbo Mini Forums

Properly the most stupid question ill ever ask on here

what is the point in centre main straps?

http://www.minisport.com/mini-spare-parts/info_CMS1O.html

this to me makes no sence at all

but this one dose
http://www.med-engineering.co.uk/catalogue...-bolt-main-only

as you drill and tap 2 more holes?

anyone care to explain to me please? :( feel so stupid for asking.

Thanks
Stephen

To condense many pages to a short answer: For mega rpm engines they might be helpful, but not everyone can agree. For turbo and relatively low rpm engines they are pointless. The problem is they have become, almost by myth, part of the standard specification for engines.

For every well read and highly qualified expert that recommends them, there are equally qualified experts that say don't bother.

Good luck getting a better answer. Mine doesn't have one.

edit:spelling

Edited by jamie@thefatgarage on 24th Jun, 2012.

Right okay :) turbo's don't normally rev over 6500 do they?

They generally don't need to to produce good power, but it depends on the Turbo used & cam etc

WWW.TURBO-MINI.COM

Thank you as I was puzzling myself if I made the right decision in leaving off a center main strap - I cant really see it being an issue for myself now

Thanks :)

Just get some decent bolts & hardened washers for the main caps, job done.

WWW.TURBO-MINI.COM

I would always use the bolts with the hardened washers. There's no way you should be torqueing a bolt head directly against the main cap.

WWW.TURBO-MINI.COM

Okay Ill take that down into account thanks Phil :) what bolts be best to use?

Setup im thinking of is

998 standard dished pistons
standard rods
lightened fly wheel
balenced crank
940 head
sw5 cam
standard rockers with fixed spacers
t2 turbo? (unsure)
custom mainfold so don't have to box it
standard box maybe x pin diff
standard drops
Intercooler

front mounted rad? maybe

:) what im thinking for now

100% on the hardened washers
i have fitted one for piece of mind- because
for what ever reason (back in t' day) it must have cured whatever problem they had because it became the thing to do
i wouldnt bother with the strap you have linked because it looks 1/4 inch thick at best, if you are going to fit one fit the biggest one that you can make fit

Yes i moved to the darkside

Instagram @jdm_brett

Okay Ill use them then :) thanks guys is what ive listed good enough?

I also have one, just for piece of mind

Audi s4 b5 - 470bhp & 486ft lbs

On 30th Apr, 2012 Brett said:
yeah stick the bit in and give it a wobble