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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Tue, Dec-23-2014, 11:43:01 AM   #1
mastek
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Default Is adding 70 hp possible to NA s54

Let's say you do the following to an OE s54:
- Race Pulleys
- CSL style Alpha-N Airbox
- Catless Headers
- Catless Exhaust
- 100 Octane
- Custom Dyno Tune

And let's say you did those and no engine (head or bottom end) modifications and took the engine out of the car and put it on an engine dyno. Would it read around 400 hp??

Because that is what the rwhp dyno math conversion says for my race car.
And I am having a hard time believing this engine is pushing 400 hp at the crank.
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Old Tue, Dec-23-2014, 11:59:17 AM   #2
tjkenny15
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Default Re: Is adding 70 hp possible to NA s54

I'd imagine its probably darn close. I'm interested in hearing feedback on this as well.
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Old Tue, Dec-23-2014, 12:06:43 PM   #3
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Default Re: Is adding 70 hp possible to NA s54

Short answer: no, you've got to get into the engine to pull that much.

I've done pretty much all the bolt ons that you can do and on 92 octane non-ethanol summer blend, my dyno is 300bhp. The shop said tack on 20% for driveline loss and that's 360. I don't know what 100 octane and a tune adjustment would give.

I've seen a shop online selling purpose built race S54s with 430 at the crank. That is probably around the max you could pull without FI.
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Old Tue, Dec-23-2014, 01:01:11 PM   #4
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Default Re: Is adding 70 hp possible to NA s54

Quote:
Originally Posted by lunaslide View Post
Short answer: no, you've got to get into the engine to pull that much.

I've done pretty much all the bolt ons that you can do and on 92 octane non-ethanol summer blend, my dyno is 300bhp. The shop said tack on 20% for driveline loss and that's 360. I don't know what 100 octane and a tune adjustment would give.

I've seen a shop online selling purpose built race S54s with 430 at the crank. That is probably around the max you could pull without FI.
But the question is, what bolt ons did you do - they are not all equal.

From countless forum members dynos (which I know aren't always totally accurate, etc. so I will use a wide range) using the following:

CSL Style Airbox (OEM, Karbonius, Evolve)
SuperSprint SSV1 <-- very important piece
Catless or HJS Section 1
Schrick 280/272 Cams
CSL Map Sensor/Rail
CSL Flash + Dyno Tune

You should be in the 340-370 range to the wheels which puts you over 400hp.

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Last edited by Mr. Wolfe; Tue, Dec-23-2014 at 01:12:59 PM.
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Old Tue, Dec-23-2014, 01:07:20 PM   #5
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Default Re: Is adding 70 hp possible to NA s54

ppl are getting there all the time. The stock M3 rates at 275, people are dynoing at 350~ after these mods..thats 70 whps more...SO yes is ur answer
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Old Tue, Dec-23-2014, 01:53:36 PM   #6
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Default Re: Is adding 70 hp possible to NA s54

Quote:
Originally Posted by Mr. Wolfe View Post
But the question is, what bolt ons did you do - they are not all equal.

From countless forum members dynos (which I know aren't always totally accurate, etc. so I will use a wide range) using the following:

CSL Style Airbox (OEM, Karbonius, Evolve)
SuperSprint SSV1 <-- very important piece
Catless or HJS Section 1
Schrick 280/272 Cams
CSL Map Sensor/Rail
CSL Flash + Dyno Tune

You should be in the 340-370 range to the wheels which puts you over 400hp.

Mr. Wolfe
This. 340-370 puts you 50+ HP ahead of stock at the low end of the range, so I think that 70 hp (400HP at crank) is entirely possible. Make the engine breath better and you can get there.
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Old Tue, Dec-23-2014, 02:10:19 PM   #7
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Default Re: Is adding 70 hp possible to NA s54

It is, with cams.
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Old Tue, Dec-23-2014, 02:11:19 PM   #8
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Default Re: Is adding 70 hp possible to NA s54

Quote:
Originally Posted by mastek View Post
Let's say you do the following to an OE s54:
- Race Pulleys
- CSL style Alpha-N Airbox
- Catless Headers
- Catless Exhaust
- 100 Octane
- Custom Dyno Tune

And let's say you did those and no engine (head or bottom end) modifications and took the engine out of the car and put it on an engine dyno. Would it read around 400 hp??
If the headers are SS V1, and the tuner is competent, I think that's possible. Especially on 100 octane.
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Old Tue, Dec-23-2014, 02:19:13 PM   #9
m3 hal
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Default Re: Is adding 70 hp possible to NA s54

Quote:
Originally Posted by mastek View Post
Because that is what the rwhp dyno math conversion says for my race car.
And I am having a hard time believing this engine is pushing 400 hp at the crank.
An easier way to determine is with a vbox or at the drag strip. If you could hit a trap speed of ~114 mph that would equal ~400 hp in this car.
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Old Tue, Dec-23-2014, 02:27:55 PM   #10
Cha5en
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Default Re: Is adding 70 hp possible to NA s54

I think you all are missing the 100 octane part. You'd be very surprised what a difference in tuning and power 100 octane (US grade) will pull..
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Discussing Is adding 70 hp possible to NA s54 in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)