I see. So both curves have the big tubes. Is the tuning done with Megasquirt?
E21 320i intake runner questions
- Thread starter E3-3.0Si
- Start date
Yes - mega squirt
A good dyno guy is a huge plus
Not just power but drivability.
A good dyno guy is a huge plus
Not just power but drivability.
E3-3.0Si
Well-Known Member
I’ll share a recent Dyno using the big c-tubes
i Dyno every month and am always surprised at the hp difference with the long tubes vs short tubes.
keep in mind I bought every c-tube on eBay in the USA before I posted here.
View attachment 96641
You missed the two eBay auctions that are ongoing with the parts listed at over $500.....
yeah- 100 a tube is too pricey...
E3-3.0Si
Well-Known Member
It is when you take in to account shipping and the customs charges, and also as a point of principle when compared against the more common $150/200.
On Saturday I saw a '78 320i at a junkyard 54 miles from me. I went for the flag mirror. If you are still in need, what is a reasonable price to pay for a set?
200 bucks shipped
I went back today and got them off the car. Let me know if you're interested.
Thanks.
Thanks.
Let e3 have first kick at the cat, it’s his thread.
if he doesn’t want them - I do.
pm me for info.
if he doesn’t want them - I do.
pm me for info.
Okay.
E3-3.0Si
Well-Known Member
Hi Kevin and Don, thanks for your consideration and kindness on this one!
Kevin - I’ve just PMd you.
Kevin - I’ve just PMd you.
E3-3.0Si
Well-Known Member
Yeah- that one on the left with the big white "L" on it.....
Second gen m90 engine.
Second gen m90 engine.
E3-3.0Si
Well-Known Member
Yeah- that one on the left with the big white "L" on it.....
Second gen m90 engine.
Oh yeah! I couldn’t believe my luck when I found it. It was originally fitted to a UK spec right hand drive E12 M535i, built in March 1981. The engine on the right is from an April 1981 732i, so has the 86mm crank as opposed to the M90’s 84mm item. If my sums are correct, then we’re looking at an increase in capacity from 3453cc to 3535cc. I’ll need to do some research on safe limits of boring on the M90 block, but even increasing bore from 93.4mm to 93.5mm will see a capacity increase to 3543cc.
I’m now really curious about what we’ll see in terms of power increase, but more importantly torque. I think the combination of a Schrick cam (spec TBC), the 86mm crank, 320i intake runners and a few other tricks will see some interesting results. Time will tell!
this question is not e3/e9 related, and should not be here
it will be much better if you put it in the proper place, as off topic in this case
I totally disagree here, we can't move all questions and discussions on non-stock parts that are commonly used to upgrade our coupes and sedans into the off-topic section.
@deQuincey ,
I replied to your report but didn’t see that you posted here. This is 100% on-topic M30 related. I won’t be pushing any m30 performance and tuning questions to OT. We don’t have an m30 or motor forum and I don’t think we should create any additional.
We need to make a judgement call with clearly e3/e9 applicable topics that touch on adjacent-platform and/or aftermarket parts. The e9 never had a B34. It never had e21 intake runners. It also never had a fire extinguisher, or a three gauge panel by the shifter. The CS never had a factory scheel seat or a raid steering wheel. Where does one draw the line?
E3-3.0Si
Well-Known Member
Hi all I don’t want to cause any discord here amongst other forum members. I guess my initial technical query has morphed in to a thread on other related subjects, but I’d hope that it is still relevant and of interest to other readers if they are curious about the subject.
It's your thread. Keep it as organic as you wish. If it is getting hijacked just kindly ask to keep it on point. If you want to pursue other subjects in the same thread - have at it!
if that is the case the title should be edited,
e21 runners to be used in e9 or M30 engines
precission is all