Aftermarket exhaust cam?

Nissanboy · 04-01-2011, 01:00 AM

Quote:

Originally Posted by Jordo!

But... if you can adjust overlap and duration, why would we even need a different cam (well, whenever we can, that is)?

All that extra lift that's mechanically possible should mean some nice potential gains in top end power...

what he said

christian370z · 04-01-2011, 01:17 AM

Quote:

Originally Posted by Nissanboy

what he said

Because the exhaust cam is not variable as VVEL only controls the intake side of the engine. Also, the VVEL mechanism can provide very aggressive intake valve lift while the exhaust cam is mild in comparison.

What Phimosis proposed is to install a more aggressive exhaust cam to more closely match the already aggressive VVEL intake lift and duration.

Jordo! · 04-01-2011, 01:34 AM

Yeah, but controlling overlap and duration from intake side will be more than half the battle without opening the head...

jnaut · 04-01-2011, 07:55 AM

soon enough i plan on opening the head anyways, just waiting for the aftermarker to keep up with my thoughts and ideas.

Megan370z · 04-01-2011, 07:56 AM

Quote:

Originally Posted by jnaut

i might try and mess with the clevis pin in the rocker-foot linkage.

good luck with that !!
I also wanted to do that but I didnt had the balls doing it in case something goes wrong,
but anyway im sure there is enough clearance between the valve and piston to allow some more lift with the screw

Jordo! · 04-01-2011, 01:50 PM

I'm just saying, we have an adjustable set of parameters and a non adjustable one that requires fabrication... seems to the first goal should be dealing with the first one and then someone can worry about designing a new exhaust cam.

Liquid_G · 02-13-2012, 08:36 PM

So, mega bump from the dead.. Saw this on RHDJapan's FB today.

JUN AUTO - JUN AUTO JAPAN - HOT NEWS

theDreamer · 02-13-2012, 08:44 PM

Interesting.

Ron · 02-13-2012, 08:51 PM

Would have been better if they compared stock vs cams only. Some of that power is coming from the higher compression 12.3:1 pistons... and bigger injectors.. and tune..

Footloose301 · 02-13-2012, 08:51 PM

Very interesting. Looks like a 30HP bump

O&G · 02-13-2012, 08:56 PM

This could help! Can't wait for more info.

NYBladeZ · 02-13-2012, 09:04 PM

Nice to know someone is on this project. Still I agree with the previous comments, hard to tell how much the cams add when you are running all the other major engine mods.

370Z JT · 02-13-2012, 09:13 PM

Nice. Who's gonna be the first.

theDreamer · 02-13-2012, 09:14 PM

Quote:

Originally Posted by 370Z JT

Nice. Who's gonna be the first.

Well first we need a vendor to get them.

NYBladeZ · 02-13-2012, 09:17 PM

They are going to be expensive, need an experience installer and a tune. With that taken into account, its safe to say that VVEL more likely than not will not be cracked cheaply (full standalone for VVEL) however an exhaust cam that can keep up with the aggressive VVEL will be awesome and help both N/A and FI guys.

04-01-2011, 01:34 AM	#18 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	Yeah, but controlling overlap and duration from intake side will be more than half the battle without opening the head... __________________ Enjoy it. Destroy it.

04-01-2011, 07:55 AM	#19 (permalink)
jnaut A True Z Fanatic Join Date: Dec 2009 Location: wpb, fl Posts: 1,146 Drives: 09 370z Rep Power: 18	soon enough i plan on opening the head anyways, just waiting for the aftermarker to keep up with my thoughts and ideas. __________________ Best 1/4 mile 12.24 Best mph 114.5_______

04-01-2011, 01:50 PM	#21 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	I'm just saying, we have an adjustable set of parameters and a non adjustable one that requires fabrication... seems to the first goal should be dealing with the first one and then someone can worry about designing a new exhaust cam. __________________ Enjoy it. Destroy it.

02-13-2012, 08:36 PM	#22 (permalink)
Liquid_G A True Z Fanatic Join Date: Aug 2009 Location: Chicago Burbs Posts: 1,439 Drives: 09 370z Supercharged Rep Power: 44	So, mega bump from the dead.. Saw this on RHDJapan's FB today. JUN AUTO - JUN AUTO JAPAN - HOT NEWS __________________

02-13-2012, 08:44 PM	#23 (permalink)
theDreamer A True Z Fanatic Join Date: Feb 2009 Location: Texas Posts: 30,879 Drives: 370z Rep Power: 4210	Interesting. __________________ theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN theDreamer's Silvia // URAS // GREDDY Houston Zs // Facebook // Twitter // Instagram

02-13-2012, 08:51 PM	#24 (permalink)
Ron A True Z Fanatic Join Date: Oct 2010 Location: Houston, TX Posts: 3,009 Drives: TT '11 PW Nismo #113 Rep Power: 22	Would have been better if they compared stock vs cams only. Some of that power is coming from the higher compression 12.3:1 pistons... and bigger injectors.. and tune.. __________________ 2011 Twin Turbo PW nismo #113 - My Journal - My TT Build Thread [ GTM GTX Stg2 TT \|\| HKS EVC6 \|\| Custom CarPC \|\| F.I 3'' TDX CBE \|\| SB 6puck clutch/ZSpeed CSC \|\| BC BR Coilovers \|\| SPC camber arms \|\| Work VSS-X \|\| Custom Headlights \|\| PW:JDM CF Covers \|\| Seibon CF Engine Cover ]

02-13-2012, 08:51 PM	#25 (permalink)
Footloose301 A True Z Fanatic Join Date: Apr 2010 Location: Naples, FL Posts: 2,659 Drives: 40th Rep Power: 21	Very interesting. Looks like a 30HP bump __________________ 2010 40th Anniversary 370Z

02-13-2012, 08:56 PM	#26 (permalink)
O&G A True Z Fanatic Join Date: Nov 2010 Location: Lone Star State Age: 42 Posts: 1,212 Drives: 40th Anv. Rep Power: 23	This could help! Can't wait for more info. __________________ O&G's Build/Journal <---(1st lowmount single turbo treeseventy) Built Engine Thread 2011 F-250 Build/Journal

02-13-2012, 09:04 PM	#27 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 20	Nice to know someone is on this project. Still I agree with the previous comments, hard to tell how much the cams add when you are running all the other major engine mods. __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

02-13-2012, 09:13 PM	#28 (permalink)
370Z JT A True Z Fanatic Join Date: Jan 2010 Location: United States Posts: 2,905 Drives: 370Z PW 7AT Rep Power: 378	Nice. Who's gonna be the first. __________________ Click for My Journal Top Secret \| EVO-R \| Fujimura Auto \| Shine Auto \| Seibon \| MRWorks \| Swift \| SPC \| SSR \| UpRev \| Project Kics \| NST \| Titek \| Eibach \| Nismo \| Whiteline \| Quaife \| Invidia \| Fly1 \| CF Element \| Carbon Signal

02-13-2012, 09:17 PM	#30 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 20	They are going to be expensive, need an experience installer and a tune. With that taken into account, its safe to say that VVEL more likely than not will not be cracked cheaply (full standalone for VVEL) however an exhaust cam that can keep up with the aggressive VVEL will be awesome and help both N/A and FI guys. __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

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