Hi,
Looking for advice to understand my results after a little dyno session which we didnt have time to do more.
Basic;
Bmw e30 m3 s14 engine, a little NA 4 cyl which isnt very powerful compared to the big v8`s and stuff.
Stock 2.3 liter was 200hp, a detuned engine for road cars sinc they really were made for racing homologation in the 80`s.
My engine is stroked to 2.66 liter, and built for road use, not for max at very high rpm.
All parts in engine is top quality stuff,and all can handle 9000 rpm, but as mentioned, its a road car for now.
Got bigger camshaft on the shelf. These only 10 and 12 mm lift.
Thing is, it has a big torque dip, which really isnt as bad as it seems on dyno papers, and its stronger with less than 100% throttle.
Anyway I have done some testing on moving the x-pipe a little to see how it really affects the powerband.
Secondly, after a little research and trying to learn stuff around this, I discovered that my engine theoretically wants quite a bit longer intake.
Since I`m running the m3 classic carbon intake, which is only made in 2 sizes these days, I tried installing some alu air horns in there.
Problem was to make them sit. I didnt want to superglue them first thing after all, so they fell out, or 2 of them, every time.
-but I think it looks promising.
Added photo shots of dyno data, with some comments on.
After showing these in another forum, a guy mentioned anti-reversion, which was new to me.
Could that help me? And where should I put it?
Also I consider the x twice the distance? But didnt get to test it.
I need to rebuild the whole front of the exhaust system when fitting into car again next weeks anyway!
Btw, 4-2 tri-y header, long primaries, and x-pipe placed 24-35-38 cm behind tri-y meets.
All comments welcome!
Dyno numbers hp, and nm.
Looking for advice to understand my results after a little dyno session which we didnt have time to do more.
Basic;
Bmw e30 m3 s14 engine, a little NA 4 cyl which isnt very powerful compared to the big v8`s and stuff.
Stock 2.3 liter was 200hp, a detuned engine for road cars sinc they really were made for racing homologation in the 80`s.
My engine is stroked to 2.66 liter, and built for road use, not for max at very high rpm.
All parts in engine is top quality stuff,and all can handle 9000 rpm, but as mentioned, its a road car for now.
Got bigger camshaft on the shelf. These only 10 and 12 mm lift.
Thing is, it has a big torque dip, which really isnt as bad as it seems on dyno papers, and its stronger with less than 100% throttle.
Anyway I have done some testing on moving the x-pipe a little to see how it really affects the powerband.
Secondly, after a little research and trying to learn stuff around this, I discovered that my engine theoretically wants quite a bit longer intake.
Since I`m running the m3 classic carbon intake, which is only made in 2 sizes these days, I tried installing some alu air horns in there.
Problem was to make them sit. I didnt want to superglue them first thing after all, so they fell out, or 2 of them, every time.
-but I think it looks promising.
Added photo shots of dyno data, with some comments on.
After showing these in another forum, a guy mentioned anti-reversion, which was new to me.
Could that help me? And where should I put it?
Also I consider the x twice the distance? But didnt get to test it.
I need to rebuild the whole front of the exhaust system when fitting into car again next weeks anyway!
Btw, 4-2 tri-y header, long primaries, and x-pipe placed 24-35-38 cm behind tri-y meets.
All comments welcome!
Dyno numbers hp, and nm.
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