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

[Wanganstyle]

Hmmm, so these swaps are now being done regularly and have good instructions to follow? I can only imagine how quick those cars are.

Drop car off at shop and write check seems to be the method you may have the most success with.

[The Dark Side of Will]

Has the new throttle per cylinder setup been discussed in this thread, yet?

http://www.r3vlimited.com/board/showthread.php?t=305953

I'm very curious about what this will do for an S52.

[nando]

well it's not going to make 350+bhp on stock internals, but it will most definitely help. what you don't have is a bottom end that can take 8,000rpm and a head that just keeps on flowing. not that an S54 bottom end is particularly well designed but that's one way it makes more power.

[The Dark Side of Will]

Yeah, head flow is power, but the throttle per cylinder really civilizes big cams.

How is the S54 bottom end different than the S52? I know the S54 oil pump and balancer are badass, but are the rods, crank, bearings, etc. different? The S54 has 0.6mm more stroke, right?

[Wanganstyle]

Yeah, head flow is power, but the throttle per cylinder really civilizes big cams.

How is the S54 bottom end different than the S52? I know the S54 oil pump and balancer are badass, but are the rods, crank, bearings, etc. different? The S54 has 0.6mm more stroke, right?

Heavier duty crankshaft
4 bolt crank damper mounting vs 1 for pedestrian engines
Double chains on cam drive
Wider rod bearings
Wild head with bucket less shims; can't do this one aftermarket.
30 degree +/- vanos on each camshaft vs pedestrian 15deg.
pork chop profile cams

The 6x throttles are about the most tame thing on the s54.


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[digger]

Yeah, head flow is power, but the throttle per cylinder really civilizes big cams.
How is the S54 bottom end different than the S52? I know the S54 oil pump and balancer are badass, but are the rods, crank, bearings, etc. different? The S54 has 0.6mm more stroke, right?

The S54 has a 1.4mm longer stroke (91mm vs 89.6mm) and 0.6mm bigger bore (87mm vs 86.4mm) which is not much different to the S52. The rod length is 4mm longer (139mm vs 135mm)

Head flow is only potential power, has anyone ever plotted out the cams for the S54 or S52? it would be interesting to see a plot of head flow in CFM vs crank angle at the respective peak hp rpm (whatever the vanos position is at that rpm).
Perhaps this would show the large difference in time-area and some quantative data for the clear reason for the 100bhp deficit.

[clydesdale]

Drop car off at shop and write check seems to be the method you may have the most success with.

I'm guessing this was sarcasm. I just want to make sure that there is support available for this swap. There are plenty of threads to dig through for an s52 swap. I have enough skills to follow a well laid plan, I don't have enough to fab or machine parts to make the swap work. I simply want to make sure that I can find a plan to follow.

Also, what is the usual cost difference. Last I checked, you should be able to get an s52 swapped for between $5k-7K. How much more for the s54?

Thanks.

[FredK]

I'm sure you could install an S54 relatively inexpensively if you were resourceful about it. A decent ballpark is that it will cost around $2500 in installation parts on the low end, plus the cost of a flash.

There really isn't much fabrication involved. You'll need to make a few sheetmetal brackets that you can easily make with a bench vise, a way to cut the metal, and a drill.

[The Dark Side of Will]

Wider rod bearings

The rod length is 4mm longer (139mm vs 135mm)

Ahh... didn't know these two. (Delta rod ratio isn't that big a deal... 1.56 to 1.60 isn't a big difference, but is a move in the right direction)

Are the rod bolts in the S54 bigger?

Perhaps this would show the large difference in time-area and some quantative data for the clear reason for the 100bhp deficit.

Enough extra airflow and lift to make the power, VANOS to civilize the powerband.

With fast ramp profiles and high flow ports, duration doesn't have to be that long, even for an 8k RPM engine.

[nando]

I'm sure you could install an S54 relatively inexpensively if you were resourceful about it. A decent ballpark is that it will cost around $2500 in installation parts on the low end, plus the cost of a flash.

There really isn't much fabrication involved. You'll need to make a few sheetmetal brackets that you can easily make with a bench vise, a way to cut the metal, and a drill.

I can flash MSS52/MSS54 for less than 10% of the total swap cost. :)

[Nesset]

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

Cams pistons bigger valves and a chip with a full system with headers ect

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[FredK]

^ you forgot a CAI.

[Mistawall]

oh god i cant believe i read all 16 pages of this thread....

[digger]

Ahh... didn't know these two. (Delta rod ratio isn't that big a deal... 1.56 to 1.60 isn't a big difference, but is a move in the right direction)
Are the rod bolts in the S54 bigger?
Enough extra airflow and lift to make the power, VANOS to civilize the powerband.
With fast ramp profiles and high flow ports, duration doesn't have to be that long, even for an 8k RPM engine.

rod ratio is not a problem when the 97 or 98mm stroke S54 strokers still use the 139mm rod.
S54 rod bolts are 11mm (according to realoem) which is bigger than the 9mm S52
Anyone can confirm the rod bearing width on the S54, I read one source that suggested it was narrower than the other inlines but a bigger diameter? it uses a smaller pin to apparently. langracing do a wider bearing on the S54
With finger follower valvetrain the ramps could be quite a bit faster, analysis would show the difference

[Wanganstyle]

rod ratio is not a problem when the 97 or 98mm stroke S54 strokers still use the 139mm rod.
S54 rod bolts are 11mm (according to realoem) which is bigger than the 9mm S52
Anyone can confirm the rod bearing width on the S54, I read one source that suggested it was narrower than the other inlines but a bigger diameter? it uses a smaller pin to apparently. langracing do a wider bearing on the S54
With finger follower valvetrain the ramps could be quite a bit faster, analysis would show the difference

S54 rod bearing is 49mm - they are wider
S52 rod bearing is 45mm - same as any m50

I'm not sure about diameter; but the S54 crankshaft is very similar to a 2JZGTE crankshaft; i had two torn down side by side. camshaft lobe spacing is almost identical also

s54 has M11 headbolts IIRC; they were weird.
rod bolts are also weird and got revised once.

The cam profile of the S54 is a porkchop; asymetrical. Is this due to the fingering valvetrain setup?