Why is Getting All Motor HP So Hard?

[GG///M3]

Also, if your DD E90 M3 is totaled, you'll actually get enough from the insurance company that you can replace the car. If your DD E36 M3 gets totaled, all you get is the toy from a cracker jack box. Not a cracker jack box - just the toy.

I didn’t think many are dd’ing their e36 m3’s these days. If mine gets totaled it’s valued at 16k lol, and my e30 m3 at 60k.

My family hauler is Japanese lol


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[TostitoBandito]

LOL yeah, exactly why I have a very generous $18K classic policy on mine.

I wouldn't be able to drive it on the streets otherwise. If some jackass rear ended me and caused a few thousand $ of damage they'd try to write off the car.

Oh, and as for your E30 M3, you see that an 8000 mile example just went for $250K?

[GG///M3]

LOL yeah, exactly why I have a very generous $18K classic policy on mine.

I wouldn't be able to drive it on the streets otherwise. If some jackass rear ended me and caused a few thousand $ of damage they'd try to write off the car.

Oh, and as for your E30 M3, you see that an 8000 mile example just went for $250K?

Yes sir


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[blckstrm]

I didn’t think many are dd’ing their e36 m3’s these days. If mine gets totaled it’s valued at 16k lol, and my e30 m3 at 60k.

My family hauler is Japanese lol


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LOL yeah, exactly why I have a very generous $18K classic policy on mine.

I wouldn't be able to drive it on the streets otherwise. If some jackass rear ended me and caused a few thousand $ of damage they'd try to write off the car.

Oh, and as for your E30 M3, you see that an 8000 mile example just went for $250K?

You know, I just can't quit.

I ALSO can't get an agreed value policy on it BECAUSE I can't quit. I do WAY too many miles in a year.

So I just keep my head on swivel and anticipate the *#$% out of every idiot out there. I do still occasionally get rear-ended. They've all been relatively low speed, but that still looks like me taking a check for less than it actually costs to fix it and making up the difference either with labor, used parts, or cash.

I added an E32 with 61k on it to our fleet back in November, and I take it sometimes when I feel sorry it just sits in the garage or when I need to haul around bigger / claustrophobic people, or sometimes when the trip won't meet my worth-a-cold-start criteria.

I see too many friends turn their car into a track car and then hardly put any smiles on it. I may just be commuting to work, but I still get a little sideways almost every day, and take the local "Nurburgring" route to work a couple times a month.

I don't know - I'm just at the point where I'd rather have loved and lost than never to have loved at all.

[Edit] I'm surprised how good autocorrect is getting. It autocorrected "busy" to "nutcase" yesterday, and today turned "miles" into "smiles."

Both were improvements to my original intent.

[pbonsalb]

I just drive my cars. I don’t care about using up their value. I bought them to drive, not park and look at and dream about driving. If I crash one, I can buy another. They aren’t that rare. I have no interest in collecting cars — don’t have the space to devote to them or the time to devote to them. This one will have a plate on it and be driven to the house in Florida in 6 months:

[GG///M3]

I just drive my cars. I don’t care about using up their value. I bought them to drive, not park and look at and dream about driving. If I crash one, I can buy another. They aren’t that rare. I have no interest in collecting cars — don’t have the space to devote to them or the time to devote to them. This one will have a plate on it and be driven to the house in Florida in 6 months:

Nice Phil.

I wish I had more time to drive. Is that a 2002ti


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[pbonsalb]

Is a 75 2002. Presently has a Schrick 306 and Weber, but that’s not a good combination for the street so it will likely get a stock cam for now. I considered motor swaps but want to get it sorted out and painted first. Was leaning towards an M42 or aftermarket fuel injection and turbo M10. M20 is a bit long for the engine bay but people do it. M50 is pretty tight and not a common swap. My wife has had the car for 25 years but it has just been sitting for 20. We have a 74 Bavaria as well that she “street restored” about 25 years ago but I have not driven it in 5 years and I think it has underbody rust that may be fatal. The old cars don’t really interest me much. They are uncomfortable, hard to drive and slow. We had a highly modded 79 635csi that we sold about 10 years ago.

[GG///M3]

Is a 75 2002. Presently has a Schrick 306 and Weber, but that’s not a good combination for the street so it will likely get a stock cam for now. I considered motor swaps but want to get it sorted out and painted first. Was leaning towards an M42 or aftermarket fuel injection and turbo M10. M20 is a bit long for the engine bay but people do it. M50 is pretty tight and not a common swap. My wife has had the car for 25 years but it has just been sitting for 20. We have a 74 Bavaria as well that she “street restored” about 25 years ago but I have not driven it in 5 years and I think it has underbody rust that may be fatal. The old cars don’t really interest me much. They are uncomfortable, hard to drive and slow. We had a highly modded 79 635csi that we sold about 10 years ago.

Dang Phil I like what I’m hearing. a good friend of mine had a 320 with some sort of Dinan turbo kit on it a few years back. Yes m50 swaps have been done . Also quite a few s14 swaps as well. I’d suggest a Kswap from the Acura rsx type S.

Someone makes an adapter plate that allows you to use a zf trans from the e36 for those k swaps. Mostly done in Mazda Miata K swaps.

Great motors


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[pbonsalb]

I’ll look into the Honda K swap. I feel like we have come nearly full circle here — the OP started out praising Honda motors. The S14 bolts in but as you know, those are rare and expensive motors. Grassroots Motorsports has Metric Mechanic build an M42 to beyond USA stock S14 power levels for its project E30 318i.

[GG///M3]

I’ll look into the Honda K swap. I feel like we have come nearly full circle here — the OP started out praising Honda motors. The S14 bolts in but as you know, those are rare and expensive motors. Grassroots Motorsports has Metric Mechanic build an M42 to beyond USA stock S14 power levels for its project E30 318i.

Ha we sure did.

M42 is a decent motor if you want to keep it all BMW. I’m about to revert back to NA


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[h82crash]

I’ll look into the Honda K swap. I feel like we have come nearly full circle here — the OP started out praising Honda motors. The S14 bolts in but as you know, those are rare and expensive motors. Grassroots Motorsports has Metric Mechanic build an M42 to beyond USA stock S14 power levels for its project E30 318i.

I think M42 would be awesome.

[ScotcH]

I think M42 would be awesome.

Meh ... build an S42B20

[blckstrm]

Dang Phil I like what I’m hearing. a good friend of mine had a 320 with some sort of Dinan turbo kit on it a few years back. Yes m50 swaps have been done . Also quite a few s14 swaps as well. I’d suggest a Kswap from the Acura rsx type S.

Someone makes an adapter plate that allows you to use a zf trans from the e36 for those k swaps. Mostly done in Mazda Miata K swaps.

Great motors


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That was the best off-topic save I've seen in a long time.

Way to bring us back to the topic at hand!

It was interesting to look up those motors. I'm not super familiar like I am with our motor or the LS (I have an Escalade I've had to pull the head on twice), but they make a surprising amount of power (and a disappointing amount of torque). I guess about what you'd expect from a 2 liter that revs to the moon.

I AM curious what happened to our OP? He's been MIA since he posted that drag motor...

[pbonsalb]

Maybe he sold the BMW and bought another Honda? Way back when I bought my E36M3, I added up the costs to get around 250 rwhp (in 2005 that was a big deal) and it seemed like a lot of money for a little hp so I bought a used supercharger kit for the same money and made more power. Of course then I added all the NA mods to the supercharged motor (Schricks, headers, midpipe, rear exhaust, 3.38 diff). Then I upgraded the supercharger. Then I changed to a turbo.

High rpm motors are not that exciting to me. I have a full bolt on E90 M3 that goes to 8600 rpm. It probably makes 400 rwhp from its 4.0L. It’s not nearly as fun as my turbo E36 M3 that makes more than 50% more power and torque.

[RickyN F355]

i like this pic of yours better:
c1219af9ca4379592b837a8924180006.jpg

[pbonsalb]

Except there is something wrong with that dyno because a naturally aspirated 3.2L that makes 310 rwhp is not going to make 287 lbs rwtq. I doubt a naturally aspirated S52 has ever made anywhere close to 287 lbs rwtq.

[ScotcH]

Except there is something wrong with that dyno because a naturally aspirated 3.2L that makes 310 rwhp is not going to make 287 lbs rwtq. I doubt a naturally aspirated S52 has ever made anywhere close to 287 lbs rwtq.

agreed. Scale must be different or something? Our s52 race engine (305 rwhp) makes ~245 rwtq

[GG///M3]

Except there is something wrong with that dyno because a naturally aspirated 3.2L that makes 310 rwhp is not going to make 287 lbs rwtq. I doubt a naturally aspirated S52 has ever made anywhere close to 287 lbs rwtq.

It’s not a standard build Phil. It’s running cams that are basically unfindable these days . Paul B cams 11.5 compression ratio, and all the proper exhaust mods.


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[pbonsalb]

Still seems like magic to me.

[nick325xit 5spd]

It’s not a standard build Phil. It’s running cams that are basically unfindable these days . Paul B cams 11.5 compression ratio, and all the proper exhaust mods.


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The question is really why is it making so little horsepower on so much torque? Something feels off.

[pbonsalb]

The math is right for 310 rwhp at 250 lbs rwtq at 6500. RPM x Torque divided by 5250 = HP

The question to me is why does a 3.2L make 250 lbs rwtq at 6500? That is 75 lbs rwtq more than stock torque at 6500. It’s pretty hard to gain that sort of torque while also gaining 100 rwhp and keeping the rpm limit about the same.

[GG///M3]

The math is right for 310 rwhp at 250 lbs rwtq at 6500. RPM x Torque divided by 5250 = HP

The question to me is why does a 3.2L make 250 lbs rwtq at 6500? That is 75 lbs rwtq more than stock torque at 6500. It’s pretty hard to gain that sort of torque while also gaining 100 rwhp and keeping the rpm limit about the same.

My old s50 made 241wtq without cams, and without higher compression .




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[pbonsalb]

That is nothing special. YWhat did it make for torque at 6500?

[ScotcH]

It’s not a standard build Phil. It’s running cams that are basically unfindable these days . Paul B cams 11.5 compression ratio, and all the proper exhaust mods.


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Ours is 12:1 CR, 290 cat cams with 12.5mm lift. We're limited by fuel on that dyno run (Sunoco 98) ... with better fuel we'd have more, but on normal fuel, there just is no more torque to get.

[GG///M3]

That is nothing special. YWhat did it make for torque at 6500?

The s50 maybe 208-210(stock cams/stock heads no porting/polishing). S52’s make more tq


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