So 143kw = 193hp is that right? this is at the rear wheels correct?
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M20 B3x Naturally Aspirated Stroker build past, present and future
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I BUY/SELL REFURBISHED CM5907s & CM5908s
HOWTOs:
DB vert plastic bumpers
OEM Keys
MTech1 docs
88 ix Lach/Card
91 ic Calypso 3.1
86 Cosmo 2.7
OEM+ or bust!
reelizmpro: I will always be an e30 guy.. I still do all of my own labor
TrentW: There's just something so right about a well-built M20 in an E30
e30m3s54turbo: I save my money for tuner parts.
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Originally posted by bradnic View PostSo 143kw = 193hp is that right? this is at the rear wheels correct?
dbilas made 143rwkw so 193 rwhp with 42ITB
RHD made 205rwhp with same 42mm ITB alot more mid range.
after driving on the new airbox it is so much better its not funny. i don't remember it pulling this hard even back when it made 220rwhp several years ago but perhaps my memory has diminished and the butt dyno is not reliable. 65C hot air through restricted socks on the street hurts alot perhaps i have been driving this too long and got used to the crappiness.
im still using the tune from the dbilas so it runs a little lean especially at part throttle i seriously need to upgrade the brakes
if i had of done the ITB swap a few years ago i think it would have been pushing 240whp. the goal is to get back to 220whp after new exhaust before i drop the new engine.89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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Originally posted by digger View Postyou can get the midrange back by using smaller longer runners if you ditch the plenum, it will still be down on peak hp though since the alignment of the adapter is inferior and heads flow potential gets hurt by creating more turbulence. the dbailas has good drive ability and response but is just pretty flatI BUY/SELL REFURBISHED CM5907s & CM5908s
HOWTOs:
DB vert plastic bumpers
OEM Keys
MTech1 docs
88 ix Lach/Card
91 ic Calypso 3.1
86 Cosmo 2.7
OEM+ or bust!
reelizmpro: I will always be an e30 guy.. I still do all of my own labor
TrentW: There's just something so right about a well-built M20 in an E30
e30m3s54turbo: I save my money for tuner parts.
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Originally posted by bradnic View Postgreat summary thanks digger. very consistent with your prior comments
Last edited by digger; 06-30-2017, 10:37 PM.89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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Originally posted by digger View Postthought people might be interested in a test i did last year with the socks and older ITB setup. i oiled the socks using the stuff you get for dirtbikes. they restrict flow a little ;)
cleaning them with kero and running them dry improved alot and it made 130kw ish which was still down about 12 kw from the equivalent unfiltered setup so individual socks are not great.
ideally you want a common large filter that all runners use not individual socks
That is a big power difference when it comes to an NA engine.
As much as power/efficiency is more important, the sound is something i just don't want to lose by boxing them up.
Anyway, will keep checking your thread for more updates.E30 325i Touring currently under construction.
http://www.r3vlimited.com/board/show...256444&page=20
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Originally posted by bmwandhonda View PostI am currently getting an ITB'd m20 tuned atm (still at the shop) and will be running individual dry filter socks. Surprising that there is a 12kw difference between the open trumpet, no filter setup :/
That is a big power difference when it comes to an NA engine.
As much as power/efficiency is more important, the sound is something i just don't want to lose by boxing them up.
Anyway, will keep checking your thread for more updates.
im enjoying the added performance more than im missing the sound TBH89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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Originally posted by digger View Postthat 12 kw doesn't include the probably 10 kw from sucking in 60C air instead of 30C so its worse than that.....when the hood is open on the dyno you get cooler air.
im enjoying the added performance more than im missing the sound TBHE30 325i Touring currently under construction.
http://www.r3vlimited.com/board/show...256444&page=20
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final results are in now that everything is tuned.
It just goes to show that ITB and new induction system can make more power everywhere and there are no downsides once you use the right diameter runners, right runner length and feed it cold air.
Made 160rwkw (215rwhp) on one run but this is the best overall powerband.
best part of 30whp gain peak to peak which is a difficult task on the m20
first graph is 42mm ITB, 12" runner length and custom GRP/CFRP airbox and K&N filter Vs a BMW OEM casting with some massaging done to it
the setup with the airbox trumped the open trumpets, which was good, though some no doubt due to the tune.
graph is as above but with open trumpets also added into the mix
had a few issues, the throttle got jammed WOT on the dyno (better there than on the street). Already had a spare at home because it started to look a bit frayed. the internal sheath deteriorated due to long term heat exposure from the exhaust is my guess and added too much friction. had to baby it home but all sorted now. i now realize it had been on its way out for a long time as the pedal is so touchy and responsive now with a brand new cable. i will adding a bit more spring tension to make it a little easier to drive otherwise it will be a handful in the wet.Last edited by digger; 06-30-2017, 10:41 PM.89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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Originally posted by LJ851 View PostNice !
This is still with your old exhaust, correct?
How high are you revving it to on those graphs ?
3400rpm is 100km/h IIRC so 6700rpm or so. limiter is 7100rpm and pulls easy to there but wasnt hitting in in these runs89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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spring tension has been increased and it drives like a dream.
Definitely needs more brakes, the pedal travel versus braking torque should be more linear and less effort to bite. tyres will limit peak braking torque but at the moment its hard to access it all the braking performance
a 5mm spacer with 16" Alpinas allows UUC 11.75" kit and massive 11" perhaps even the 11.75".89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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Originally posted by digger View PostDefinitely needs more brakes, the pedal travel versus braking torque should be more linear and less effort to bite. tyres will limit peak braking torque but at the moment its hard to access it all the braking performance
What kind of pads are you running ? A decent pad makes a huge difference if you are not already running them.
Also, we are going to need some videos up in here.
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Originally posted by LJ851 View PostWhat kind of pads are you running ? A decent pad makes a huge difference if you are not already running them.
Also, we are going to need some videos up in here.89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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Originally posted by digger View Postim running stock pads and rotors, the stock pads feel alot better than others ive tried.
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