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Old 07-17-2013, 07:50 PM   #1
Twin_Turbo_S54
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S54 9000 rpm valvetrain

S54 valvetrain malfunctions over 8250 rpm on boosted S54s.

Is there any interest for a 9000 rpm revving S54 valvetrain inc valves, retainers, springs ans cams?

What about billet main caps for S54, any interest?
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Old 07-17-2013, 10:40 PM   #2
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yes to the valvetrain.
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Old 07-17-2013, 11:52 PM   #3
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This is likely out of my budget so I guess it doesn't matter to me too much... but I think people would be appreciative of some kind of superior rod bearing before revving that high. Stock cars are failing around ~100k miles, I imagine 9k RPMs would accelerate that wear.
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Old 07-18-2013, 04:21 AM   #4
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Originally Posted by TerraPhantm View Post
This is likely out of my budget so I guess it doesn't matter to me too much... but I think people would be appreciative of some kind of superior rod bearing before revving that high. Stock cars are failing around ~100k miles, I imagine 9k RPMs would accelerate that wear.

I ve been revving 9200 rpm with a 97 mm stroke ( 3500 cc) for the last 2 years with zero issues, however I did not test 100.000 miles.
So a 91 mm (3200 cc) will rev easily. I do rev 9000 on my S50 B32 with a 91 mm stroke with zero issues as well.

Those WHO want to rev 9000-9200 rpm will not be after 200.000 mile engine life.

Even if you rev a stock stroke but boosted S54 past 8200 rpm, valve train suffers..

The extra power band between 8000-9000 rpm is for the ones WHO want to make more power out of S54. This kit will basically optimiz S54's output.
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Old 07-18-2013, 02:02 PM   #5
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A little more detail on what you're proposing.

Supertech sells upgraded / high RPM valve train stuff, for both non-M and M.
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Old 07-18-2013, 05:00 PM   #6
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VAC also has a uprated valvetrain but don't know if its propose is for higher rpm...
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Old 07-18-2013, 05:21 PM   #7
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all the details are as follows:

S54 valve shims leave their seats at over 8200 rpm on boosted S54s.

This problem has been solved on S50 B32 engines with the help of "shim under bucket" system.

A shim under bucket system is not possible on S54 due to the design of the oem system.

I was very willing to solve the shim issue and by 2008 worked on this problem.

In order to rev 8200 + rpm, I have custom made valves which are lighter and more durable for the combustion
chamber heat. Custom made retainers titanium, valve shims and a set of valve springs which allow you to rev till 9200 rpm.

Moreover, a set of custom made camshafts help to make more power through all rpms.

There is a common belief that aftermarket cams make a turbo engine perform worse due to increased overlap.

This is 100 % false.

I ve been testing at least 10 diferent cams in the last 5 years and custom cams spool earlier and make more power throughout the complete power band.

If we put back standard cams without changing anything else, the engine revs slower, builds less boost at earlier engine speeds.

I may put this as a complete set to sell, I wanted to see if the S54 platform wants to optimize boosted S54 engines.

- more boost and more air flow at all engine speeds, meaning more power everywhere.

- ability to rev 9000 rpm (supras rev 10.500 these days). This allows to use a shorter ring and pinion ratio. Or a higher trap speed at each gear...

- valves which can stand the stress / heat of turbo (or nitrous)
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Old 07-19-2013, 06:17 PM   #8
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^ good to hear about the cams, regarding overlap and boost.
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Old 07-27-2013, 02:05 PM   #9
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S54 9000 rpm valvetrain

Quote:
Originally Posted by Twin_Turbo_S54 View Post
S54 valvetrain malfunctions over 8250 rpm on boosted S54s.

Is there any interest for a 9000 rpm revving S54 valvetrain inc valves, retainers, springs ans cams?

What about billet main caps for S54, any interest?
I'd be interested in billet main caps. Also cams for power throughout rpm range to 8000 max... I would even be interested in cams that would flow only to 7500 for the sake of longevity. I'm not a high horsepower only goal. Mine r to have wide power band and torque with decent HP... With more street drivability and longevity focus


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Last edited by being3; 07-27-2013 at 02:05 PM.
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Old 07-29-2013, 10:18 PM   #10
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Quote:
Originally Posted by being3 View Post
I'd be interested in billet main caps. Also cams for power throughout rpm range to 8000 max... I would even be interested in cams that would flow only to 7500 for the sake of longevity. I'm not a high horsepower only goal. Mine r to have wide power band and torque with decent HP... With more street drivability and longevity focus


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whats your setup?

compression ratio / fuel / turbo ?
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Old 07-29-2013, 10:20 PM   #11
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S54 9000 rpm valvetrain

Quote:
Originally Posted by Twin_Turbo_S54 View Post
whats your setup?

compression ratio / fuel / turbo ?
9:1 comp forged, pauter rods, 6766 h cover , 94 octane, 50/50 water meth


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Old 07-29-2013, 11:11 PM   #12
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Quote:
Originally Posted by being3 View Post
9:1 comp forged, pauter rods, 6766 h cover , 94 octane, 50/50 water meth


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I believe the HPF engines have Carrillo Rods; Pauter will be in my next motor.
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Old 07-29-2013, 11:27 PM   #13
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S54 9000 rpm valvetrain

Quote:
Originally Posted by Commanderwiggin View Post
I believe the HPF engines have Carrillo Rods; Pauter will be in my next motor.
That's good to know... I wasn't sure i new HPF sold both. I would like the Pauter titanium rods..


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Old 07-30-2013, 01:29 PM   #14
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I would be interested in purchasing such an upgrade.

Quote:
Originally Posted by Twin_Turbo_S54 View Post
all the details are as follows:

S54 valve shims leave their seats at over 8200 rpm on boosted S54s.

This problem has been solved on S50 B32 engines with the help of "shim under bucket" system.

A shim under bucket system is not possible on S54 due to the design of the oem system.

I was very willing to solve the shim issue and by 2008 worked on this problem.

In order to rev 8200 + rpm, I have custom made valves which are lighter and more durable for the combustion
chamber heat. Custom made retainers titanium, valve shims and a set of valve springs which allow you to rev till 9200 rpm.

Moreover, a set of custom made camshafts help to make more power through all rpms.

There is a common belief that aftermarket cams make a turbo engine perform worse due to increased overlap.

This is 100 % false.

I ve been testing at least 10 diferent cams in the last 5 years and custom cams spool earlier and make more power throughout the complete power band.

If we put back standard cams without changing anything else, the engine revs slower, builds less boost at earlier engine speeds.

I may put this as a complete set to sell, I wanted to see if the S54 platform wants to optimize boosted S54 engines.

- more boost and more air flow at all engine speeds, meaning more power everywhere.

- ability to rev 9000 rpm (supras rev 10.500 these days). This allows to use a shorter ring and pinion ratio. Or a higher trap speed at each gear...

- valves which can stand the stress / heat of turbo (or nitrous)
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Old 07-30-2013, 02:17 PM   #15
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S54 9000 rpm valvetrain

Quote:
Originally Posted by Twin_Turbo_S54 View Post
whats your setup?

compression ratio / fuel / turbo ?
So what would u need for a set of ur custom cam shafts ? Do u buildup and regrind the stock ones to ur spec? What would be involved for billet mains? What do u think r bottom end could handle with built mains torques wise? ( I believe torque is the weak point more than HP imop) ur thoughts ?


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Old 07-30-2013, 05:26 PM   #16
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Quote:
Originally Posted by m3sc View Post
I would be interested in purchasing such an upgrade.

what is your set-up?

Quote:
Originally Posted by being3 View Post
So what would u need for a set of ur custom cam shafts ? Do u buildup and regrind the stock ones to ur spec? What would be involved for billet mains? What do u think r bottom end could handle with built mains torques wise? ( I believe torque is the weak point more than HP imop) ur thoughts ?


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the cams are built from ground, so they are not regrind.

camshafts to raise power till 9000 rpm.
valves ( + 1 mm oversize)
you need to port the heads......................to get the most out of it.
valve springs
retainers
main and rod bearings coated
Optional: DLC coated rocker arms

this is what I ve been running since 2008 and been happy with this valvetrain setup.

Building my E46 M3 coupe with the same combination and a 6766 turbo, will be a family commuter.

This valvetrain package allows to broaden the power band.


regarding torque & billet mains: well I think I am the only one WHO has been spraying 250 shot of nitrous on a 3500 cc S54 with 11,5 compression.

I think my S54s made the most torque at lower engine speeds and the billet mains held with no issues.

I ve been using VAC bearings w/o issues as well.

3500 cc
alcohol as the fuel
11,5 compression
custom cams
250 shot nitrous @ 3200 rpm
twin gtx3076

this combination made lots of torque

to be honest, your system does not need billet mains as the 3,2L / 67 mm turbo and low compression will be ok for the stock mains.

you may add L19 main studs.

If you will spray n20 or use alcohol as the main fuel, billet mains are a must. but not with your tq/hp as of now.
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Old 07-30-2013, 11:39 PM   #17
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S54 9000 rpm valvetrain

Quote:
Originally Posted by Twin_Turbo_S54 View Post
what is your set-up?




the cams are built from ground, so they are not regrind.

camshafts to raise power till 9000 rpm.
valves ( + 1 mm oversize)
you need to port the heads......................to get the most out of it.
valve springs
retainers
main and rod bearings coated
Optional: DLC coated rocker arms

this is what I ve been running since 2008 and been happy with this valvetrain setup.

Building my E46 M3 coupe with the same combination and a 6766 turbo, will be a family commuter.

This valvetrain package allows to broaden the power band.


regarding torque & billet mains: well I think I am the only one WHO has been spraying 250 shot of nitrous on a 3500 cc S54 with 11,5 compression.

I think my S54s made the most torque at lower engine speeds and the billet mains held with no issues.

I ve been using VAC bearings w/o issues as well.

3500 cc
alcohol as the fuel
11,5 compression
custom cams
250 shot nitrous @ 3200 rpm
twin gtx3076

this combination made lots of torque

to be honest, your system does not need billet mains as the 3,2L / 67 mm turbo and low compression will be ok for the stock mains.

you may add L19 main studs.

If you will spray n20 or use alcohol as the main fuel, billet mains are a must. but not with your tq/hp as of now.
Thanks as for the clarity... Excellent info


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