6 branch manifold

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jmc330i
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Fri Feb 14, 2014 11:01 pm

reggid wrote:
steve_k wrote:
reggid wrote:i know some pretty high powered m20 engines with a hot tuning manifold. it may not look as pretty but it still seems to perform well
Any links?? winkeye
this engine uses chinese BTB copies im led to believe also the ones i were thinking of are raceland NOT hot tuning as i thought.

259kw - is that really just under 350bhp from a 2.8 M20? 8O
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steve_k
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Fri Feb 14, 2014 11:02 pm

How much??
if it's got t*ts or wheels it's bound to be trouble...............prove me wrong.
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reggid
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Sat Feb 15, 2014 1:40 am

jmc330i wrote:
reggid wrote:
steve_k wrote: Any links?? winkeye
this engine uses chinese BTB copies im led to believe also the ones i were thinking of are raceland NOT hot tuning as i thought.

259kw - is that really just under 350bhp from a 2.8 M20? 8O
its at the wheels so at the flywheel is closer to 400 bhp
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bss325i
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Sat Feb 15, 2014 12:36 pm

NA? How is this possible?!

Engine spec?
http://www.bmrperformance.co.uk

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suchy
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Sat Feb 15, 2014 5:03 pm

ross_jsy wrote:It's a little bit above me, but from what I understand equal length primaries (of the correct length and diameter, there are calculations to work this out) create a scavenging effect as the gases moving through the tube from one opening of the exhaust valve are still in the primary, sucking the subsequent pulse out when the exhaust valves open again.


Does that make sense?
Ahh right that makes a bit of sense! :)
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ross_jsy
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Sat Feb 15, 2014 5:26 pm

bss325i wrote:NA? How is this possible?!

Engine spec?
14.5:1 compression ratio and 9k rpm according to the youtube video 8O
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timmzey
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Sat Feb 15, 2014 6:37 pm

Edited for privacy
Last edited by timmzey on Mon Nov 20, 2023 7:32 am, edited 1 time in total.
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carpenter
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Sat Dec 17, 2016 4:06 pm

Does anyone has experience with these headers maybe? They look like a btb copy.... they sold 37 of them so maybe they are not such a bad copy..?


http://www.ebay.co.uk/itm/STAINLESS-STE ... SwvzRX19RN
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Kos
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Mon Dec 19, 2016 3:31 am

just another copy of a BTB
PUKAR DESIGNS - Reproduction BMW Decals Labels Sticker & Number Plates
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carpenter
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Mon Dec 19, 2016 9:59 am

Yes, but there are good and bad copies... :( ,any results on dyno with those, anyone..?
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driftmaster808
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Thu Dec 29, 2016 4:04 pm

not from China there arean't any good copies
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