M42club.com - Home of the BMW E30/E36 318i/iS
DISCUSSION => Swaps, Turbos, Buildups => Topic started by: petsracing1 on August 29, 2015, 04:54:47 AM
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M42 Rally
M42 standard bottom end
1839cc using 85mm Mahle motorsport pistons
Supertech 1mm larger inlet valves
Dbilas valve springs
Cometic head gasket
Kennelly Cams 278° 10.7mm lift
Still on hydraulic lifters
Kennelly tickled head
E46 M3 50mm throttle bodies mounted to a gttechnic manifold adapter
9lbs Lightweight alloy flywheel
Looking forward to making it go 2 years in the making
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Some more photos
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Getting close
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Nice!!
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Hi
Nice, what compression and how long are your inlet runners?
Cheers Rohan
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Runners are pvc pipe starting with 385mm. And the compression is 12.1 most we could get with out getting serious
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What rpm do you intend to turn? Those cams and intake have 8,500 written all over them, although the box looks a bit small
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8500rpm is what we are hoping for but might be restricted because of the hydraulic lifters
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Hi
Neat, what's the internal diameter of the pvc runners, have they been bell mouthed, trumpets?
Do you have the oringinal trumpets for those itbs? What's there internal diameter?
Cheers Rohan
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hi
will get some more photos tomorrow
thanks
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Internal diameter of the runners is 50mm and made a spacer to make the air box bigger if needed out of a nylon chopping board. Because it's a rally engine we are going for response rather than top end horsepower. Trumpets as you can see, not factory. Once we have found the best runner length we might have a go at making some tapered runners.
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The second event after getting the new engine running still need to do exhaust as it is getting a lot of reversion with the factory exhaust at low revs
https://www.youtube.com/watch?v=1POPLMR1Yts
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are you still using the afm and what power is it making?
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We have not had the car on the dyno and are not using an afm
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out of interest what gearbox and diff do you run? 3rd seems quite a step.
Engine sounds very nice though!
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We are just using the standard gearbox with a 4.4 lsd but we have a 5.0 to go in it which should help
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Getting the tune close, worked out that the runner length was critical for reversion after adjusting the length we found a sweet spot where it seems happy.
https://www.youtube.com/watch?v=ndvOaCYGywg
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looks and sounds awesome, Any indications of power yet? How far off the final tune do you think you are
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Tune is at about 80% , feels like a broad power band kennelly cam comes in at 5800 and it has another kick at 7200 tune lengths we think. Would guess more than 180hp wants to keep pulling to limiter of 8300
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What kind ITB is one? or of which folded?
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E46 M3 50mm throttle bodies mounted to a gttechnic manifold adapter
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photo of adapter? around sucking? the price?
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Tune still not quite right but we are getting closer.
https://www.youtube.com/watch?v=Un2GnE4CcYw
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Now its moving! Did you change gear set/final drive? Looks like the package is really coming together.
Any plans for north island rallys?
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Yeah we put the 5.0 crown wheel and pinion into the car and its getting alot closer to where we want it to be.
We went up and competed at the rallycross in tauranga earlier in the year. We would love to go up and do the Wairarapa rally one day.
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http://nzmotorracing.co.nz/2016/08/08/stunning-rally-drive-canterbury-teenager/
Is this you. If so great result!