Jezebel Engine Rebuild... Part 2

calypso

///Member
Crash_Nemesis said:
Thanks German_Spec. I did some research and it turns out Shrick Cams are not recommended for Supercharging as they keep the valves open for too long. Something to that effect.

I was gonna buy them but then after hearing that, I decided to not to get them.

Thanks for the best wishes guys.

[video=youtube]

Check this. The HPF drag car, which should end up on around 1400 runs on stock cams.
So maybe cams are a little overrated for FI.
And they keeping the Vanos too.
 

moranor@axis

///Member
Official Advertiser
turbo cams and supercharger cams are completely different so no point in comparing the two...

with a turbo you have compressed air going in as well as a restriction on the exhaust...

with an SC you get plenty air going in but the exhaust and exhaust valves became the restriction if you fit an exhaust cam that can flow more with a well flowing exhaust then the flow increases drastically though the engine...

what this does is drop boost pressure because the engine is flowing more what you can do then is up the boost again to the same level you had before...

the net result is you flowing way more air than before without any added detonation problems this is a very effective way to make more power on an SC application...

on a turbo car turbo sizing is way more important than cams because thats where the restriction in flow is... there are as always exceptions to the rule though :)
 

Andy1GP

///Member
German_spec said:
Crash, if im not mistaken, didnt Matt run titanium exhausts without any box's?

Not on the current setup.

Straight pipes all the way through bad idea, it's going to cause bleeding ears. Should be kinda awesome for the first week though but then just sound overkill :) Just try it as is and do the exhaust later on.
 

osiris

///Member
M3 is one of the only cars that I would leave the exhaust alone! All I would ever do on it is remove cats, other than that BMW got it perfect! Just my opinion though!
 

ChrisBrand

Staff - Legal
Staff member
osiris said:
M3 is one of the only cars that I would leave the exhaust alone! All I would ever do on it is remove cats, other than that BMW got it perfect! Just my opinion though!

No you just do this

[video=youtube]
 

Andy1GP

///Member
After hearing what a Turbo'd M3 sounds like with 3 silencers I'd recommend trying it out first without changing the exhaust. It was MAD loud. You can always gut and go louder, not nice working backwards.
 

Crash_Nemesis

///Member
Ok. UPDATE TIME...

The Valve seats have finally arrived. Took over two months to get these bad boys.

Here is a video to show the amount of work needed to fix the cylinder head.

[video=youtube]
 
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