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Old 02-28-2013, 06:53 PM   #1
Twin_Turbo_S54
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Spool data: 15 psi @ xxxx rpm

Where does a built S54 see 15 psi of boost pressure, in 3rd gear:

with a precision 6768

with a precision 7675

with a precision 7175?

I have 4 M3s all of them twin turbo. Two S54 M3s and Two S50 B32 M3s. All twin charged.

Would like to convert one of them into a single turbo but would like to know the spool.

At which rpm do you see 15 psi at 3rd gear?
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E46 M3 Sedan All Wheel Drive Twin Turbo
0-100 km/h 2.91 seconds @ 15 psi

E46 M3 Coupe Turbo 60-130 mph 4,2 seconds (2011)

Last edited by Twin_Turbo_S54; 02-28-2013 at 06:54 PM.
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Old 02-28-2013, 07:03 PM   #2
Twin_Turbo_S54
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With twin 68 mm 15 psi @ 6100 rpm, 3200 cc engine
With twin 62 mm 15 psi @ 5600 rpm, 3200 cc engine
With twin 62 mm 15 psi @ 5250 rpm, 3500 cc engine
With twin 57 mm 15 psi @ 4700 rpm, 3500 cc engine
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E46 M3 Sedan All Wheel Drive Twin Turbo
0-100 km/h 2.91 seconds @ 15 psi

E46 M3 Coupe Turbo 60-130 mph 4,2 seconds (2011)
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Old 02-28-2013, 07:03 PM   #3
Dreikraft
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im assuming you mean on tip in? most guys are now running the 6766 not 68
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Old 02-28-2013, 08:04 PM   #4
BDUB328I
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Quote:
Originally Posted by Twin_Turbo_S54 View Post
With twin 68 mm 15 psi @ 6100 rpm, 3200 cc engine
With twin 62 mm 15 psi @ 5600 rpm, 3200 cc engine
With twin 62 mm 15 psi @ 5250 rpm, 3500 cc engine
With twin 57 mm 15 psi @ 4700 rpm, 3500 cc engine
Did u just answer ur own question?
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Old 02-28-2013, 08:09 PM   #5
Commanderwiggin
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Quote:
Originally Posted by BDUB328I View Post
Did u just answer ur own question?
He wants single turbo info.

If I had to guess:
- 6466 15psi@ 4200rpm
- 6766 15psi@ 4400rpm
- 6768 15psi@ 4450rpm
- 7168 15psi@ 4500rpm

Give or take a couple hundred rpm on each...just rough guessing based off dyno sheets running 18-20psi on ~8.5-9CR 3.2L on 91octane Fuel
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Last edited by Commanderwiggin; 02-28-2013 at 08:42 PM.
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Old 02-28-2013, 08:54 PM   #6
MarcusLSB
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On my 7168 on a 3200cc block (9.5:1), on E85.. I see 200kpa at 4500rpm
I do not have a dyno graph of my car on the 7275.. but I was told it spooled slower.

Last edited by MarcusLSB; 02-28-2013 at 08:57 PM.
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Old 03-01-2013, 02:54 AM   #7
Twin_Turbo_S54
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Quote:
Originally Posted by Commanderwiggin View Post
He wants single turbo info.

If I had to guess:
- 6466 15psi@ 4200rpm
- 6766 15psi@ 4400rpm
- 6768 15psi@ 4450rpm
- 7168 15psi@ 4500rpm

Give or take a couple hundred rpm on each...just rough guessing based off dyno sheets running 18-20psi on ~8.5-9CR 3.2L on 91octane Fuel

thank you, but read my below statements.
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E46 M3 Sedan All Wheel Drive Twin Turbo
0-100 km/h 2.91 seconds @ 15 psi

E46 M3 Coupe Turbo 60-130 mph 4,2 seconds (2011)

Last edited by Twin_Turbo_S54; 03-01-2013 at 04:14 AM.
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Old 03-01-2013, 02:57 AM   #8
Twin_Turbo_S54
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Quote:
Originally Posted by MarcusLSB View Post
On my 7168 on a 3200cc block (9.5:1), on E85.. I see 200kpa at 4500rpm
I do not have a dyno graph of my car on the 7275.. but I was told it spooled slower.
Marcus,

thats very useful information.

3500 cc
11,5:1 compression ratio
E100
68 mm turbo should see 200 KPA @ 3000-3200 rpm.

Do you know the max whp made with a precision 68 mm turbo?
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0-100 km/h 2.91 seconds @ 15 psi

E46 M3 Coupe Turbo 60-130 mph 4,2 seconds (2011)
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Old 03-01-2013, 04:14 AM   #9
Twin_Turbo_S54
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Quote:
Originally Posted by Commanderwiggin View Post
He wants single turbo info.

If I had to guess:
- 6466 15psi@ 4200rpm
- 6766 15psi@ 4400rpm
- 6768 15psi@ 4450rpm
- 7168 15psi@ 4500rpm

Give or take a couple hundred rpm on each...just rough guessing based off dyno sheets running 18-20psi on ~8.5-9CR 3.2L on 91octane Fuel
dyno sheets cant be used unless it is a load type dyno such as dyno Dynamics.

On dyno Dynamics, I was able to play with the ramp rate (Load) and imitate road like boost build.

By using the correct ramp rate I was able to make boost at the same engine speed as I did on the road.

Now when a dyno jet is used, you cant play around load and that means boost build will be different compared to the road boost build.

As a result, if look at dyno graphs, a load type dyno has to be looked at.
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E46 M3 Sedan All Wheel Drive Twin Turbo
0-100 km/h 2.91 seconds @ 15 psi

E46 M3 Coupe Turbo 60-130 mph 4,2 seconds (2011)
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Old 03-01-2013, 04:19 AM   #10
MarcusLSB
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Quote:
Originally Posted by Twin_Turbo_S54 View Post
Marcus,

thats very useful information.

3500 cc
11,5:1 compression ratio
E100
68 mm turbo should see 200 KPA @ 3000-3200 rpm.

Do you know the max whp made with a precision 68 mm turbo?
I don't unfortunately.

I like that E100 on 11.5:1 I bet that thing rips!

Quote:
Originally Posted by Twin_Turbo_S54 View Post
dyno sheets cant be used unless it is a load type dyno such as dyno Dynamics.

On dyno Dynamics, I was able to play with the ramp rate (Load) and imitate road like boost build.

By using the correct ramp rate I was able to make boost at the same engine speed as I did on the road.

Now when a dyno jet is used, you cant play around load and that means boost build will be different compared to the road boost build.

As a result, if look at dyno graphs, a load type dyno has to be looked at.
DynoJet does have Eddy brakes (not all but the xLC's do.).
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Old 03-01-2013, 05:05 AM   #11
Twin_Turbo_S54
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Quote:
Originally Posted by Commanderwiggin View Post
He wants single turbo info.

If I had to guess:
- 6466 15psi@ 4200rpm
- 6766 15psi@ 4400rpm
- 6768 15psi@ 4450rpm
- 7168 15psi@ 4500rpm

Give or take a couple hundred rpm on each...just rough guessing based off dyno sheets running 18-20psi on ~8.5-9CR 3.2L on 91octane Fuel
Quote:
Originally Posted by MarcusLSB View Post
I don't unfortunately.

I like that E100 on 11.5:1 I bet that thing rips!


DynoJet does have Eddy brakes (not all but the xLC's do.).

I ve runnig on Alcohol and 11,5:1 compression since 2009.
Transfers S54 into a different engine.

3500 cc
alcohol
11,5:1
9200 rpm
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0-100 km/h 2.91 seconds @ 15 psi

E46 M3 Coupe Turbo 60-130 mph 4,2 seconds (2011)
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Old 03-01-2013, 05:31 PM   #12
MarcusLSB
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Quote:
Originally Posted by Twin_Turbo_S54 View Post
I ve runnig on Alcohol and 11,5:1 compression since 2009.
Transfers S54 into a different engine.

3500 cc
alcohol
11,5:1
9200 rpm
I've been on E85 for a little over a year and a half.. and I love it. My compression however has been lower (9.5:1 or 9:1).. but I'm going to raise the compression to 11.5:1.
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Old 03-01-2013, 06:05 PM   #13
Twin_Turbo_S54
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Quote:
Originally Posted by MarcusLSB View Post
I've been on E85 for a little over a year and a half.. and I love it. My compression however has been lower (9.5:1 or 9:1).. but I'm going to raise the compression to 11.5:1.
Marcus, you ll love 11,5:1.

It seems as if onlyy you and I are interested in spool data
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0-100 km/h 2.91 seconds @ 15 psi

E46 M3 Coupe Turbo 60-130 mph 4,2 seconds (2011)
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Old 03-01-2013, 06:53 PM   #14
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Me to.
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Old 03-03-2013, 05:04 AM   #15
Providence
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After the fuel surge kit is installed we can do the runs for spool data but my 7168 is not cea it is just billet we r starting the fst install this week
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Old 03-03-2013, 05:06 AM   #16
Twin_Turbo_S54
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Originally Posted by Providence View Post
After the fuel surge kit is installed we can do the runs for spool data but my 7168 is not cea it is just billet we r starting the fst install this week

Good luck mate. Let me know if you need anything.
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E46 M3 Sedan All Wheel Drive Twin Turbo
0-100 km/h 2.91 seconds @ 15 psi

E46 M3 Coupe Turbo 60-130 mph 4,2 seconds (2011)

Last edited by Twin_Turbo_S54; 03-03-2013 at 05:13 AM.
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