What "bolt ons" bring an s52 to 300hp and what's the cost?

[C-T]

I have never seen a dyno of an s52 under 205.

Ah. "205."

Yes, sadly, I have seen some dyno very weak around 195 whp. Needless to say, the owners weren't particularly ecstatic.

[JGood]

If you notice those are s50's and you're trying to say that a bigger maf, tune and exhaust had 50 hp? Seriously?

You posted some of the highest s50's I've ever seen. This proves the uselessness of dyno's when it comes to comparing peak numbers to another engine, on another dyno, on the other side of the country.



Spend some time looking through here for an idea of average output (with or without mods):

http://forums.bimmerforums.com/forum/showthread.php?t=454142&highlight=dyno+library

[Uber E30]

I assume you mean 225 whp, and I also assume that you mean posted online.

no i mean 205 and yes i mean posted online. Maybe people just dont post sub 200's but anything putting down 195 has to be a super super tired engine and not a valid baseline.

[C-T]

no i mean 205 and yes i mean posted online. Maybe people just dont post sub 200's but anything putting down 195 has to be a super super tired engine and not a valid baseline.

One was a 1996 M3, dyno'd about 1999 or so. It belonged to my friend, and it was no more tired than anyone else's three year-old car, and again, sadly it wasn't the only one I'd seen under 200 whp stock. It hardly surprises me that you wouldn't see that kind of dyno online, since it's nothing to brag about, and that's most of what those online dynos are all about.

[jrdeamicis]

I have had friends with S52s dyno around 200 even. They still scooooooot.

Btw. ^ Love the car.

[clydesdale]

Yeah, love the all black e30. I was talking crank hp at 300. I figure I will get an s52, which should mean about 240hp than what will it take to get to about 300 without sacrificing driveability, smooth idle, reliability and non-obnoxious sound?

[z31maniac]

Are you reading this thread at all? Have you done ANY research on modding a 24v motor?

If you are looking for 300 crank hp, then it can be done with a properly setup cam kit.

The typical mods + a good tune and cams should get you close or there.

[White325is]

A bolt on supercharger kit from RMS will get you 300. :)

[C-T]

I have had friends with S52s dyno around 200 even. They still scooooooot.

Btw. ^ Love the car.

Thanks! It needs shadowline trim pretty severely, but I'm really happy with it.

Yeah, love the all black e30. I was talking crank hp at 300. I figure I will get an s52, which should mean about 240hp than what will it take to get to about 300 without sacrificing driveability, smooth idle, reliability and non-obnoxious sound?

Again, you will be right around your desired power number with a cam kit, a set of headers, and proper exhaust. Drivability will not suffer in the slightest, and gas consumption is decent - For me, at least, as I average around 22/23 mpg with a mixture of daily "city" and highway driving.

The only thing I cannot comment on is "non-obnoxious sound," because an S52 with just an intake can be loud enough for some to consider obnoxious. Adding the rest does add to the volume of the car (obviously), but I have personally always found the sound to be aggressive, tuned, and pretty damn sweet. :)

Here is a poor clip of mine, if interested. The noise from the road and the wind did not help capture the sound. The idle at the end is audibly somewhat lumpy, but it's a symptom of my Sunbelt Sport cams. I have a custom pipe from the stock headers to a middle resonator, ending in a B&B Tri-Flo off my old M3:

http://www.youtube.com/watch?v=QlqchTB1OnM

It isn't necessarily quiet, but compared to some of my friend's cars with truly loud setups, it's pretty tame.

[Jean]

That doesn't sound bad at all. Still a tad 'raspy' for my liking, but much much better than some others I've heard.

[C-T]

That doesn't sound bad at all. Still a tad 'raspy' for my liking, but much much better than some others I've heard.

Thanks. A lot of the rasp is the can. If a different exhaust had carried over from my old M3 rather than the Tri-Flo, the sound would have been less raspy.

[clydesdale]

z31maniac, yes I am reading and yes I have done some research. But no, I have not found a single friggin post as concise and as clear as what C-T just posted in post #39. Thanks C-T that is what I was looking to find out.

[loonibab325i]

A few videos of my 91 318is s52 e30 with cams, this thing puts a smile on my face every time i sit in it!




http://www.youtube.com/watch?v=w7bxVL-1jOk (0-150mph)

http://www.youtube.com/watch?v=e_rtvZyLxYQ (single slide)

http://www.youtube.com/watch?v=BrkrMQo18pw (launch 1/2)

http://www.youtube.com/watch?v=ah52vibrgaU (launch 2/2)

http://www.youtube.com/watch?v=FZ9ep_PKAQE (uphill drive)

I estimate my s52 e30 to be around 300 crank hp.

here's a PARTIAL list of mods I have (not just the s52 swap costs, also not including the cost of motor and transmission), hope that helps your choice

+S52
+ZF Transmission
+97 M3 Contours
+97 M3 Front Brakes/Rotors/strut assembely - 5 lug
+Spec Racing Clutch $635
+E34 M50 Oil Pan $90
+E34 M50 Oil Tube/stick $free
+OBD 1 Wiring Harness $125
+413 DME $125
+OBD1 fuel rail $20
+OBD1 crank position sensor $20
+OBD1 cam position sensor $20
+OBD1 ping/knock sensors $20
+OBD1 throttle boot $20
+AKG wiring Adapatar $200
+THR brake booster $200
+Headers $110
+E34 Oil Pickup $20
e21 tranny mounts $70
e28 motor mounts $50

+Euro HFM
+Bosch 24 # injectors
+ TMS Chip
+ TMS Shrick Cams
+Dr Vanos stage 2 Vanos unit kit
$2000 installed.

+Ground Control Coilovers/ koni yellows $1000
+e36 318ti Rear Brake assembly - 5 lug (pretty much brand new) $750
+New rear subframe $30
+Rear Subframe Bushings $120
+THR Eyball Control Arms $200
+Kosei K1 17x8.5 - 235/40/17 Falken Azenis RT-615 - insatlled, warrenty. $1600 new,
+e36 B-caps $50
+Spray paint, fluids, etc etc.. $300+
+Misc maintinance parts, gaskets, etc... etc... $200
+TMS OBD-I 3.2 Coolant Hose Adapter $40
+Water Temp Sensor Wiring Adaptor $50
+2 tie rods $40
+obd1 coolant hose $72
+thermostat housing $25
+Clutch line $40
+e30 Temp Sensor $12
+HEX BOLT WITH WASHER M6X60-Z3 2 07119913001 $1.00
+HEX BOLT WITH WASHER M6X95-Z1 2 07119912701 $2.00
+TRIM PANEL WIRE HARNES ENGINE 1 51711380392 $20.31
+COVERING WIRE HARNES ENGINE 1 51711380391 $18.19
+SUPPORT WIRE HARNES ENGINE 1 51711380390 $22.32
+INSERT WIRE HARNES ENGINE 1 51711380888 $5.93
+HEX NUT WITH PLATE 7 07129902630 $4.00
+ACCELERATOR BOWDEN CABLE 1 35411163228 $30.13
+GASKET RING A14X20-CUSN 4 32411093596 $1.00
+Cooling hoses $67, need 1 more though, 1 is leaking.
+water pump pulley $25
+Driveshaft nuts + bolts $16
+E30 CSB $45

[MIKe30]

Hope I can contribute to this thread once i get my pile rolling again...

[SamE30e]

haha or a s38

s85