PCM ZR409 vs. ZR450

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   I follow Chris Parrish on Twitter.  The other day he mentioned something about the 450 being a great engine etc., I guess they were testing it.

I assumed it was the new supercharged engine they were talking about in a previous thread, but it's not.  That one is a 550.

It looks like the ZR450 is nearly identical to the ZR409 on the exterior.  The displacement, 364 cu, is the same too.

I did notice however, that the ZR409 advertises itself as being able to run on standard octane.  The ZR450 doesn't make any mention of octane, so I assume by omission, that it needs higher.

Is the 450 a re-tuned 409 essentially? 

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Bri892001 Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947	Post Options Post Reply Quote Bri892001 Report Post Thanks(0) Quote Reply Topic: PCM ZR409 vs. ZR450 Posted: June-23-2011 at 2:52pm
	I follow Chris Parrish on Twitter. The other day he mentioned something about the 450 being a great engine etc., I guess they were testing it. I assumed it was the new supercharged engine they were talking about in a previous thread, but it's not. That one is a 550. It looks like the ZR450 is nearly identical to the ZR409 on the exterior. The displacement, 364 cu, is the same too. I did notice however, that the ZR409 advertises itself as being able to run on standard octane. The ZR450 doesn't make any mention of octane, so I assume by omission, that it needs higher. Is the 450 a re-tuned 409 essentially?

TRBenj Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21184	Post Options Post Reply Quote TRBenj Report Post Thanks(0) Quote Reply Posted: June-23-2011 at 3:00pm
	Youre correct- both the ZR (409 and 450) engines are 6.0L based. The 450 has a new cam (specific to PCM, so Im told) and retuned ECU.

wakeboardin2k4 Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum Member Joined: December-14-2006 Location: Hopatcong, NJ Status: Offline Points: 1117	Post Options Post Reply Quote wakeboardin2k4 Report Post Thanks(0) Quote Reply Posted: June-23-2011 at 3:21pm
	Cam specs tim?
	"I'm planning to bring my girl that rides on a trailer with me and leave my girl that complains about camping at home"

wakeboardin2k4 Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum Member Joined: December-14-2006 Location: Hopatcong, NJ Status: Offline Points: 1117	Post Options Post Reply Quote wakeboardin2k4 Report Post Thanks(0) Quote Reply Posted: June-23-2011 at 3:25pm
	And wtf would a consumer need more than 409 HP let alone 550!
	"I'm planning to bring my girl that rides on a trailer with me and leave my girl that complains about camping at home"

TRBenj Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21184	Post Options Post Reply Quote TRBenj Report Post Thanks(0) Quote Reply Posted: June-23-2011 at 3:26pm
	PCM Proprietary... dont expect those numbers to become public knowledge anytime soon. More hp = better... you've driven Joe's boat!

Bri892001 Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947	Post Options Post Reply Quote Bri892001 Report Post Thanks(0) Quote Reply Posted: June-23-2011 at 4:21pm
	I noticed they managed to crank up the Pro-sport to 303 hp as well. They call it the HO303 now with the same displacement as before. That's pretty impressive. I wonder if they were gunning to get 305hp out of it to keep the hp and displacement the same.

PCM ZR409 vs. ZR450

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