twin weber 45 on stock engine

hanse21 · Post by **hanse21** » Fri Mar 04, 2011 6:51 am

would twin 45's be okay on a stock engine? i have found a kit brand new with manifold and linkage etc. or would 40's be better. thanks

PeteK · Post by **PeteK** » Sat Mar 05, 2011 4:18 am

Way too big for a stock M10. You'll lose any kind of power below 3000 rpm.

raseeda green · Post by **raseeda green** » Mon Mar 14, 2011 7:46 pm

so I take it that 40s will be better?

e21-Mark · Post by **e21-Mark** » Mon Mar 14, 2011 8:26 pm

PeteK · Post by **PeteK** » Tue Mar 15, 2011 7:54 am

Even twin 40s is pretty big. Unless you're planning on future upgrades like a big cam, you'd be wasting your money. Something like a weber 32/36 should do the job admirably.

Cheers

raseeda green · Post by **raseeda green** » Tue Mar 15, 2011 7:49 pm

Mine is a 1.8L is this ok?, I will just go slow for now untill, l plan for this, 2L upgrade in time,

hanse21 · Post by **hanse21** » Mon Mar 21, 2011 5:50 am

yeah i plan on a lumpier cam in future, i just want it to run with the 40's till i can afford other stuff. sounds good. had the money transferred into paypal to buy them online but paypal limited my account! some australian anti money laundering laws. bastards. haha

PeteK · Post by **PeteK** » Mon Mar 21, 2011 6:31 am

I had a set of 48 mm quad throat injection manifolds on a stock m10 in the e12 and it was an absolute nightmare unless you revved it over 4000. I know that's a lot bigger than 40's or even 45's, but it's the same in theory.

The twin 40's have 3 times more area then a standard e21 needs and the 45's have almost 4 times the area!

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twin weber 45 on stock engine

twin weber 45 on stock engine

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