Raising The Redline On The Z

JARblue · 03-27-2019, 11:30 AM

So it's been 6 years since the last post here...

Any more thoughts on increasing redline? I am looking to get billet oil pump gears installed along with the lightest flywheel I can find. Not necessarily looking to bounce 8K+ RPMS regularly; maybe just some shifting above 7500 RPMs on the track occasionally.

From basic research, it appears that after the oil pump gears, the VVEL valve train is the limiting factor for RPMs. Anyone have additional info or thoughts on the matter?

AlWakRa · 03-27-2019, 11:59 AM

Currently I have my limiter at 7700rpm as per Seb, I hit it a few times in track, as I reach the braking point, didn't face any issues until now, I think I read vvel is limiting the revs to 8k.

But the issue, vvel generates a lot of heat, so better to stay less.

JARblue · 03-27-2019, 12:18 PM

With all the engine bay heat, a vented hood and new intakes will definitely be a good idea (I'm running the R2C intakes currently and IATs are pretty high).

AlWakRa · 03-27-2019, 12:44 PM

Yeah you will need them, I have both, I don't feel the power drop, but the car still overheat after two hot laps, even with vents, they help mostly in cooling lap, when I reach pit, the car is already cooled down.

FPenvy · 03-27-2019, 12:44 PM

mines been set to 7900/8000 since 2013 and zero issues.

i dont go and bang it off of 7900 but it's set there just because stock limiter robs some top end HP which on the VQ is all we have lol

chuckie311 · 03-27-2019, 10:11 PM

Mine will be set to 8k dropping in boundary engineering gears When the cam gets out in..

JARblue · 03-28-2019, 12:14 AM

Wish I could find the SuckerPunch gear and housing on its own. Have several inquires out there to various retailers. MAM appears to have it in stock but only when you also purchase the JWT camshaft kit, which I am not interested in.

chuckie311 · 03-28-2019, 12:38 AM

Quote:

Originally Posted by JARblue

Wish I could find the SuckerPunch gear and housing on its own. Have several inquires out there to various retailers. MAM appears to have it in stock but only when you also purchase the JWT camshaft kit, which I am not interested in.

thats why i went with boundary gears.. sucker punch takes to long to get a hold of if you can reach them..i bought a new pump and Seb will put the gears in next week

https://www.z1motorsports.com/engine...s-p-11938.html

Elmo370z · 03-28-2019, 01:03 AM

Quote:

Originally Posted by AlWakRa

Currently I have my limiter at 7700rpm as per Seb, I hit it a few times in track, as I reach the braking point, didn't face any issues until now, I think I read vvel is limiting the revs to 8k.

But the issue, vvel generates a lot of heat, so better to stay less.

No one has solved valve float issues once you get to 8k and beyond.

JARblue · 03-28-2019, 10:33 AM

FWIW, Concept Z responded to me that they just sold out but are having more SuckerPunch oil pump gears and housings made. They're telling me it should "be around a week."

zer099 · 03-28-2019, 01:56 PM

Quote:

Originally Posted by Elmo370z

No one has solved valve float issues once you get to 8k and beyond.

I'm not asking this to piss in anyone cereal, but to have the information and understanding: Has anyone actually confirmed valve float above 8000RPMs or are we just still speculating? Speculation is fine, and safe, but I just spent the better half of an hour searching these forums and could not find a confirmed case of valve float (and to be fair, I could have missed it), but the best I found was everyone discussing it may be an issue, but no one every reving that high long enough to confirm it is an issue.

Again, not trying to start anything, I am just curious if we are still in theories stage about things or if we have some documented evidence.

cupcakez · 03-28-2019, 02:16 PM

Quote:

Originally Posted by chuckie311

thats why i went with boundary gears.. sucker punch takes to long to get a hold of if you can reach them..i bought a new pump and Seb will put the gears in next week

https://www.z1motorsports.com/engine...s-p-11938.html

does seb charge 125 an hour for labor?
and also how much is he charging to do this labor for you?
i'm bringing my car to seb for other reasons for him to work on starting the first week of july! so excited!

chuckie311 · 03-28-2019, 03:20 PM

Quote:

Originally Posted by cupcakez

does seb charge 125 an hour for labor?
and also how much is he charging to do this labor for you?
i'm bringing my car to seb for other reasons for him to work on starting the first week of july! so excited!

yes that's there shop rate.. Dropping the car off tomorrow for install...

Elmo370z · 03-28-2019, 04:07 PM

Quote:

Originally Posted by zer099

I'm not asking this to piss in anyone cereal, but to have the information and understanding: Has anyone actually confirmed valve float above 8000RPMs or are we just still speculating? Speculation is fine, and safe, but I just spent the better half of an hour searching these forums and could not find a confirmed case of valve float (and to be fair, I could have missed it), but the best I found was everyone discussing it may be an issue, but no one every reving that high long enough to confirm it is an issue.

Again, not trying to start anything, I am just curious if we are still in theories stage about things or if we have some documented evidence.

Yup yup. Not posted on these forum, couples shop have proven this. I been in private talks about this issue. Daelen care to chime in

zer099 · 03-28-2019, 04:56 PM

Quote:

Originally Posted by Elmo370z

Yup yup. Not posted on these forum, couples shop have proven this. I been in private talks about this issue. Daelen care to chime in

Good information. Would be nice to know the situations, data, and the like. Our stock intake springs are stout little guys (~199lb @ 12.8mm). Compared to the exhaust side which is almost half that rate (~120lb @ 10.2mm), its surprising the exhaust side isn't floating first. Even the springs with the JWT cam kit is ~136lb @ 12.5mm lift.

03-27-2019, 11:30 AM	#16 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	So it's been 6 years since the last post here... Any more thoughts on increasing redline? I am looking to get billet oil pump gears installed along with the lightest flywheel I can find. Not necessarily looking to bounce 8K+ RPMS regularly; maybe just some shifting above 7500 RPMs on the track occasionally. From basic research, it appears that after the oil pump gears, the VVEL valve train is the limiting factor for RPMs. Anyone have additional info or thoughts on the matter? imjello likes this. __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

03-27-2019, 11:59 AM	#17 (permalink)
AlWakRa Track Member Join Date: Oct 2010 Location: Qatar Posts: 600 Drives: 10 370Z PW 6MT Rep Power: 13450	Currently I have my limiter at 7700rpm as per Seb, I hit it a few times in track, as I reach the braking point, didn't face any issues until now, I think I read vvel is limiting the revs to 8k. But the issue, vvel generates a lot of heat, so better to stay less. JARblue likes this. __________________ 2010 370Z Touring Sport Pearl White 6MT Powered by: Fast Intentions - Motordyne - Stillen - OS Giken - CJ Motorsports - Mishimoto - MCA Suspension - SPL - SuperPRO - RJM - Z1 Motorsport - Zspeed - Volk My Humble Journals

03-27-2019, 12:18 PM	#18 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	With all the engine bay heat, a vented hood and new intakes will definitely be a good idea (I'm running the R2C intakes currently and IATs are pretty high). __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

03-27-2019, 12:44 PM	#19 (permalink)
AlWakRa Track Member Join Date: Oct 2010 Location: Qatar Posts: 600 Drives: 10 370Z PW 6MT Rep Power: 13450	Yeah you will need them, I have both, I don't feel the power drop, but the car still overheat after two hot laps, even with vents, they help mostly in cooling lap, when I reach pit, the car is already cooled down. __________________ 2010 370Z Touring Sport Pearl White 6MT Powered by: Fast Intentions - Motordyne - Stillen - OS Giken - CJ Motorsports - Mishimoto - MCA Suspension - SPL - SuperPRO - RJM - Z1 Motorsport - Zspeed - Volk My Humble Journals

03-27-2019, 10:11 PM	#21 (permalink)
chuckie311 Enthusiast Member Join Date: Jul 2012 Location: las vegas Posts: 313 Drives: Q50/G37 Rep Power: 13	Mine will be set to 8k dropping in boundary engineering gears When the cam gets out in.. JARblue likes this. __________________ Tuned by (Seb@Specialty-Z) 2011 G37 Cam'd FBO 347whp 280wtq Corn Fed 4.08 Gears

03-28-2019, 12:14 AM	#22 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	Wish I could find the SuckerPunch gear and housing on its own. Have several inquires out there to various retailers. MAM appears to have it in stock but only when you also purchase the JWT camshaft kit, which I am not interested in. __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

03-28-2019, 10:33 AM	#25 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	FWIW, Concept Z responded to me that they just sold out but are having more SuckerPunch oil pump gears and housings made. They're telling me it should "be around a week." __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

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