DIY: Z1 Intake Plenum and Spark Plug Swap [Picture Heavy]

Jordo! · 03-16-2014, 03:02 PM

Quote:

Originally Posted by synolimit

Maybe. This dyno says its 8-9hp over the m370 mani which we all know loses power over the stock mani top end. Whats it vs just a normal mani though??? The graph looks like it keeps up with the m370 mid range power but the top end should be no different than the stock mani. We need a back to back. Far as I can tell its cheaper than the m370, you gain "almost" as much mid range as the m370, yet you keep your top end as if you kept the stock mani. All in all seems worth it. I think though $300 is a little to much. A local shop or you could knock this out with a drill and the right bits/sand paper bits.

Oh, really??? I didn't catch that this wasn't a comparison to the OEM IM -- then I don't know what to make of it.

It could be anywhere from 3 -5 over OEM then. Maybe. If that's the case, then yeah, $300 is a bit steep, and doing on the cheap by DIY/local shop who knows what they're doing would be the only way to make it even worth the trouble.

No comparisons of that floating around?

synolimit · 03-16-2014, 04:54 PM

Local shops charge $35hr. No comparison as of yet that I've seen.

The shop and I are going to do a full test and tune on this. We are porting the stock lower, upper and throttle bodies. We will install the lower and dyno. Then tune it with dyno. Then the upper and dyno, tune, dyno etc. we should have results soon.

black_sedan · 03-16-2014, 07:40 PM

Anyone know if the TPS relearn and idle relearn needs to be done when installing the intake plenum? I know on the my g35 vq35hr if the TB was disconnected, you would have to do the relearn.

Zoren 370 · 07-04-2014, 02:42 AM

Quote:

Originally Posted by Z Stig

Installed mine last Sunday. My throttle bodies had been cleaned about 5k miles ago, so I did not need to remove the coolant hoses. I just loosened the four bolts and moved them out of the way. I am getting a tune from Z1 to maximize my mods. Until then, I really noticed a difference in the drive with the plenum install. Very happy with it and looking forward to the tune!

When you say you noticed the difference with the drive can you be more specific please of the difference VS when you have the OE manifold. Been trying to consider this if its worth the money to gain some minuet hp or torque. Thanks

Dragon_Ball_Z · 12-10-2014, 04:47 AM

Quote:

Originally Posted by Zoren 370

When you say you noticed the difference with the drive can you be more specific please of the difference VS when you have the OE manifold. Been trying to consider this if its worth the money to gain some minuet hp or torque. Thanks

I second this

1cleanZ · 12-10-2014, 09:33 AM

Quote:

Originally Posted by synolimit

Maybe. This dyno says its 8-9hp over the m370 mani which we all know loses power over the stock mani top end. Whats it vs just a normal mani though??? The graph looks like it keeps up with the m370 mid range power but the top end should be no different than the stock mani. We need a back to back. Far as I can tell its cheaper than the m370, you gain "almost" as much mid range as the m370, yet you keep your top end as if you kept the stock mani. All in all seems worth it. I think though $300 is a little to much. A local shop or you could knock this out with a drill and the right bits/sand paper bits.

Can you explain both of these statements??? Between 4500-5k RPMs, where the M370 is known for its low end tq gains, the Z1 manifold is clearly almost 10whp AND ft/lbs of TQ lower!!???

Its all going to come down to opinions of "which is better" because different people have different wants out of the manifold(top end whp, or lowend midrange TQ). The Z1 Manifold has some clear gains up top over the M370, but are those truly "gains" when comparing to the M370, or just avoiding losing top end AND losing low end vs the M370.

The Z1 needs to be compared vs the OEM manifold, not the M370 to get true gains vs OEM.

synolimit · 12-10-2014, 10:50 AM

Quote:

Originally Posted by 1cleanZ

Can you explain both of these statements??? Between 4500-5k RPMs, where the M370 is known for its low end tq gains, the Z1 manifold is clearly almost 10whp AND ft/lbs of TQ lower!!???

Its all going to come down to opinions of "which is better" because different people have different wants out of the manifold(top end whp, or lowend midrange TQ). The Z1 Manifold has some clear gains up top over the M370, but are those truly "gains" when comparing to the M370, or just avoiding losing top end AND losing low end vs the M370.

The Z1 needs to be compared vs the OEM manifold, not the M370 to get true gains vs OEM.

That's only 500rpm and probably a MAF spike. You wont be able to feel that or compare it cause look at 4000-4500rpm. It says the OEM made the opposite vs 4500-5000rpm. Hence why run 7 and run 12 both make the same TQ.

I wouldn't say it's clear, what else was done? Do we believe this with no other data? I hate peoples belief sometimes in a big company that what's put down on paper must be 100% true.

I did this already but I compared the OEM mani vs a ported upper, lower and ported throttle bodies. Theres a reason they won't show you OEM vs just a ported upper (1-2hp maybe). My testings not complete though. We will redo this soon with this cars cats remove.

John@Z1 · 12-11-2014, 10:59 AM

Quote:

Originally Posted by synolimit

That's only 500rpm and probably a MAF spike. You wont be able to feel that or compare it cause look at 4000-4500rpm. It says the OEM made the opposite vs 4500-5000rpm. Hence why run 7 and run 12 both make the same TQ.

I wouldn't say it's clear, what else was done? Do we believe this with no other data? I hate peoples belief sometimes in a big company that what's put down on paper must be 100% true.

I did this already but I compared the OEM mani vs a ported upper, lower and ported throttle bodies. Theres a reason they won't show you OEM vs just a ported upper (1-2hp maybe). My testings not complete though. We will redo this soon with this cars cats remove.

Way to plug yourself again. I see you on every Z1 plenum thread, after you purchased our plenum to see how far you could port your own. Must be a nice coat tail ride. Since you are now a sponsor please try to carry yourself a little better. We expect more out of The370Z.com sponsors.

To answer 1cleanZ. I tell all that the Motordyne is better for low end while the Z1 is better on topend. We spend more time on the top of the graph at the track and on mountain runs.

synolimit · 12-11-2014, 04:49 PM

Quote:

Originally Posted by John@Z1

Way to plug yourself again. I see you on every Z1 plenum thread, after you purchased our plenum to see how far you could port your own. Must be a nice coat tail ride. Since you are now a sponsor please try to carry yourself a little better. We expect more out of The370Z.com sponsors.

To answer 1cleanZ. I tell all that the Motordyne is better for low end while the Z1 is better on topend. We spend more time on the top of the graph at the track and on mountain runs.

I never purchased your manifold for me, I don't own a HR motor. That was a customer in Dubai that did who bought our TB's and lower. And check your dates Jon. I first had stuff ported for just me months before and my mani was already done and installed before I ever started doing it for others!! The porter I have do this lives in Indy and never saw your mani. Kinda hard to coat tail isn't it? Go ahead and check your dates when he bought and then check my date when I started the porting thread. I'll wait....

And I'm sorry, I didn't know you were the only one allowed to do something. O and since I started porting the TB's and lower first, does that mean you're coat tailing off me?

We are also finishing up flow bench testing now and we dynoed the stock vs ported stock, I haven't seen either from you guys so you sure you want to call me out?

And I'll continue to conduct myself the way I do. If I feel threatened, attacked, called out, trolled upon etc I'll respond in a way that's equal and to put them in their place they need to be at. And if I call someone out like you just did I'll at least have my facts straight. I'll ask you to do the same.

Boss_302 · 12-11-2014, 06:47 PM

True there is no great mystery to cleaning up this stock manifold.
Just good practicable experience.

JARblue · 12-11-2014, 07:03 PM

Quote:

Originally Posted by synolimit

And I'll continue to conduct myself the way I do. If I feel threatened, attacked, called out, trolled upon etc I'll respond in a way that's equal

SurfDog · 04-01-2015, 04:18 AM

subd. parts on the way

carlitos_370z · 04-01-2015, 07:37 AM

Subscribed... Hope to buy one someday

03-16-2014, 04:54 PM	#32 (permalink)
synolimit A True Z Fanatic Join Date: May 2013 Location: Columbus, OH Posts: 5,051 Drives: 2013 Silver 370z Rep Power: 3389	Local shops charge $35hr. No comparison as of yet that I've seen. The shop and I are going to do a full test and tune on this. We are porting the stock lower, upper and throttle bodies. We will install the lower and dyno. Then tune it with dyno. Then the upper and dyno, tune, dyno etc. we should have results soon. __________________ 13 370z-

04-01-2015, 04:18 AM	#42 (permalink)
SurfDog A True Z Fanatic Join Date: May 2012 Location: Colorado (9000 feet) Age: 56 Posts: 1,796 Drives: 09 6mt, 13 Sequoia, Rep Power: 15749	subd. parts on the way __________________ 09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix

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03-16-2014, 07:40 PM	#33 (permalink)
black_sedan Enthusiast Member Join Date: Dec 2011 Location: Florida Posts: 308 Drives: 14' F150, 14' Q50 Rep Power: 14	Anyone know if the TPS relearn and idle relearn needs to be done when installing the intake plenum? I know on the my g35 vq35hr if the TB was disconnected, you would have to do the relearn.

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