E30 Zone

updates

will be starting to finish my head end of this month i have relocated and still need to unpack my garage goods

the 2.7 is a eta crank knife edged balanced lightened flywheel 325 rods specially modified 84.5 325 pistons with a alpina copy head based on the one i have its running alpina ecu piggyback and maf with the old alpina head it made 170kw the cr has been bumped up new bigger injectors fitted exhaust sy...

had the 2.7 alpina build where the 2nd head in pics came from on a dyno for a tune up and remapping it now pushes
183kw or 245hp at 6300 rpm with 302nm of torque at 5200 rpm

im looking into one of these blowers they use to inflate air castles or even a leave blower to do the sucking

will look and see what i can source locally to build my own but i dont have high hopes as i stay in a 4th world town

when i do a similar test with a paraffin gun and soap water it is more noticeable than with just the water on the other cracked heads ive tried a few different approaches on changing the short port will experiment more this weekend to see which one works the best hopefully my new cutting tips that i...

on the alpina head the water is coming out on the whole of the valve seat hole on the stock head there is always a part that gets no water

here is some measurements the first one is the stock size the second one is the alpina head intake port 37.2 vs 38.1 intake port 45.2 vs 46.3 intake valve seat hole 36.9 vs 38.1 exhaust valve seat hole 30.5 vs 31.9 exhaust port 31.2 vs 34 the step in the bowl of intake by the valve guide has a .5mm ...

the alpina pistons had a shallower dish to raise the compression the combustion chamber mods improves combustion the sa alpinas had a 10.4-1 cr for the 155kw version and a 9.8-1cr for the 145kw version those figures were in the 97 leaded petrol days Simon postage will bankrupt us but it would have b...

boys i made a calculation error when i converted the prices to pounds it not 1500 its 10500 and 20000
zar divided by 10 is pounds i used 100

here is how i did mine also had the problem with catching linkage
http://www.e30clubsa.co.za/forum/index. ... k-fiiting/

im just going to copy the flow on the alpina head the only difference this head don't have multi angle seats but the hole in the valve seats are bigger than the stock one ill get the exact dimensions when i work on the head again it had a bit of extra flowing done to it after it came from alpina i d...

i did some ccing on my stock and alpina head my stock head cc at 37.8 the alpina head cc at 41.8 the motor this one came of was a 2.7 that made 170kw @6500rpm about 228 horse these are both cracked :cry: :cry: i did a spare stock head to alpina combustion chamber and got it to 41.8 cc 2 was spot on ...

@bmw sport im in south africa i dont know the seller this 333 they sell for 150000 zar about 1500 pounds then they are reasonable the mint ones the owners wont sell even if you offer them 250000 zar or about 2500 pounds i personalty know 4 333 owners and none of them will let them go of the 206 bmw ...

there were only 206 examples of the 333 made in South Africa they go for 1500 to 2000 pounds if you can get the owner to part with it
my friend in sa has car no 1
here is a link to the car
http://www.track-tv.co.za/forum/viewtopic.php?f=8&t=114

back to topic the hole in the valve seat have you changed it in your flow testing experiments
and what is your take on making the hole bigger by 1 to 1,5mm

the alpina pistons were mahle pistons the hc ones had a short skirt similar to the way Screech has cut his in South Africa we got the 325 IS that was from bmw with the alpina 2.7 motors and the m 3 suspension there were 2 versions one had a 145kw motor the other made 155kw when i inquired from bmw S...

the only difference between the alpina 2.7 and the 325 piston is the pin height and the dish is shallower to raise the compression ratio the shape and position is the same
the alpina 2.7 piston is not the mahle high compression 325 slug

HairyScreech what is the combined cc of your piston and combustion chamber

thye are all the same its just the coding plug that must be the same as the one in speedo
i used a 730i obc with the e 30 coding plug in mine and it works perfectly

Thanks Screech ill keep looking for those stats from you

do you know what the difference is of flow on a stock 885 head vs a stock 731 head

on my stroker im using 320 rods block is decked .3mm head is .8mm lower than stock my quench clearance came to .8mm compression ratio about 11.3:1 if i remember correctly ,had to pocket the pistons for valves 2mm deeper as the valves were touching the pistons on my 320 rods i cut oil squirter slots ...

the alpina pistons had a shallower dish in the piston than the stock pistons

@ Giggs have you got your kit yet
@ CHR1S1990 have your problem with the shocks been sorted
i want to get a 40mm drop for my car but need to know if this kit is worthwhile or must i rather go for a eibach drop kit with koni shocks
im in south afrika so if this kit is not worth it i would like to know

i used a 525 e block, e 36 2.8 crank, 130mm con rods, 9.4 compression ratio 325 i pistons and 325 head gas flowed, running a 280 cam and tnt branches and free flow compression ratio in motor is 10.5 re chipped ecu for the South African 2.7 evo 2 (or IS as its called here ) revlimit 7500 rpm and 325 ...

here is a thread to my 2.8 stroker with dyno sheet
you need to register to read the post
http://www.e30clubsa.co.za/forum/index. ... topic=3350

The 320 manual box will work on the 2.5 motor. i used a 320 box for 1 year after changing my 320 to 325 the 320 have the better ratios of the two, as the ratios are very close to the sportbox/ close ratio box that bmw had on some 325 models. in the 320 box the first gear is longer than 2,5 2nd bit l...

my choke has disappeared in my car it starts first crank struggles to idle at 400 rpm then after a while it picks up and runs at a steady 900 rpm ive tried different idle control vales different afm`s different tps switches no leaks in pipes if i put the air con on the revs stays the same ive change...

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disapeared choke