Steven_H

Any information about the torque on the X51? Are the HP figures conservative, or fairly accurate? Anyone driven a 'standard' 355 hp S back to back with 381 hp X51? Suppose you want AWD and natural aspirated? Probably very limited, if any, track time. Daily driver in Northeast.

Azurro_California_911

My 911 S has X-51, my brother's 911 S doesn't. Two weeks ago I drove them both back to back. From a dead stop it's tough to feel any differance. At higher RPM's, from around 5000 on, mine seems to pull harder.

From memory the torque on the X-51 is 302 ft lbs.

TT Gasman

Not to highjack your thread, but isn't a C4S X51 pushing close to turbo money?

ELUSIVE

Torque of the X51 is 306 ft lbs. 11 ft lbs greater than the standard 3.8 engine.
Not enough for $17K in my opinion.

PAULSPEED

Hi,
It looks like the X51 package has more stuff then just HP.
Check this link out.

http://e-partssales.com/Merchant2/m...y_Code=996sport

Paul

PAULSPEED

Hi,
Itested the link and it did not work. Try this one.

http://e-partssales.com/Merchant2/me..._Code=996sport

Paul

jhbrennan

The link says it's for a 996 - does it also fit the 997??

Steven_H

Farnbacher Loles can modify ECU on 3.8L X51 to produce GT3 level HP @ lower RPM. Makes the X51 more interesting, no?

JohnnyBahamas

I've got some first person experience.

I put 16,000+ miles on a 2005 C2S w/ the standard 3.8. Then I changed to a 2006 C4S with x51 that I now have 6,000+ miles on. I drove both the same style... hard w/ the RPMs targeting 4000-5000 so that the power curve is always at it's most potent on the throttle up and up shift. And I can feel the difference blindfolded. No question.

The turbo wasn't available to be ordered new a year ago... and still isn't from my dealer if you're not one of the next 4 people on the list.

JohnnyBahamas

Now you're talking. Who do I call?

jrgordonsenior

As an alternative, I raced my stock S against a friends slightly modified S the other night. I was surprised he pulled me as strongly as he did especially in the lower part of the rev band. By 4th gear he was 2 lengths ahead and still pulling away. He had Evolution Motorsports Stage 4 package which sells for $6,700. The difference between their Stage 1-3 packages and the Stage 4 is simply more exhaust options. The Stage 2 for $2,750. is probably where I'm headed....

http://www.evoms.com/marketplace/marketplace.asp?curr={0A3E1B79-EA6C-4A02-BE23-3D6F91B7FDEF}&depth=30&parentid={0A3E1B79-EA6C-4A02-BE23-3D6F91B7FDEF}

Edgy01

Any aftermarket developer will get more HP out of the 997 because they don't have to meet manufacturers reliability and exhaust rules.

10 GT3

Not quite up to Turbo money, but right in the price range of a GT3 which is significantly lighter, has more power, better suspension and bigger brakes.

JFScheck

But what if you are not going to be driving at that "GT3 edge"?

I'll take the comfort and performance of my X-51 C2S any day - I drive mine ALL the time

gpjli2

This would be more meaningful if you had run the two cars together before the mods. There can be significant differences between stock machines.