Forums/Z31P/z31-basics basic-modifications-basic-questions-aka-the-newbie-forum/Opinions: ASCO Plenum
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1986zxt: (2011-11-30 18:37:46)
Just ordered the Z31 plenum from Zack at ASCO and am anxiously awaiting it's arrival and more impotantly, the installation. Would like to hear from others who have completed this mod about HP gains and/or any other gains. Thanks
reddzx: (2011-11-30 20:52:05)
Probably won't notice much without other accompanying mods.
1986zxt: (2011-11-30 21:12:53)
Such as?
NissanEgg: (2011-11-30 21:16:16)
intake, exhaust, boost, cams, etc
1986zxt: (2011-11-30 21:24:53)
I didn't list my current mods as thety are listed in the sig.
1) K&N cone Filter
2) C&M Performance 3" with hi flo catalytic converter and muffler
3 Turbosmart MBC set at 10psi currently (will probably turn that up to 11 or 12 psi when the plenum is installed. Prob stick to 11 till I get an intercooler installed.)
1986zxt: (2011-12-05 15:30:48)
Anyone?
1986zxt: (2012-01-30 15:12:31)
Have gotten the plenum installed and will pick up the car on Wed. My mechanis indicates significant increase in mid-hi rpm response. It appears to be as advertised by Zack as it relates to HP gains and response.
I'll add more to the post after picking the car up.
NissanXRMA: (2012-01-30 19:42:28)
I've never ran a stock manifold and gutted to compare, but by design (greater volume), the gains should be in the mid-hi rpm range.
michaelp: (2012-01-30 19:43:51)
[quote]NissanXRMA wrote:
Have gotten the plenum installed and will pick up the car on Wed. My mechanis indicates significant increase in mid-hi rpm response. It appears to be as advertised by Zack as it relates to HP gains and response.
I'll add more to the post after picking the car up.
I've never ran a stock manifold and gutted to compare, but by design (greater volume), the gains should be in the mid-hi rpm range.
MMHMM, but stock is better for low-mid.
1986zxt: (2012-02-02 14:35:12)
The plenum is in. Bang for the buck is low. The claimed 7-10% increase in hp I believe is mildy overstated. Still good.
Should have gone intercooler first. Oh well, live and learn.
reddzx: (2012-02-02 14:43:06)
amreboot: (2012-02-02 15:49:16)
I didn't go to a gutted plenum until I got my 6765 turbo.
I even had a t3/t04e pushing 20+psi, and I was still using the stock oem plenum with the stock throttle body.
You really have to have supporting mods to utilize the potential from a gutted plenum, even then, you may not "feel" the difference.
1986zxt: (2012-02-02 15:51:39)
[quote]reddzx wrote:
Probably won't notice much without other accompanying mods.
At what level would this make a significant difference or would it? Zack indicated it would bring 7-10% based on the mods I have currently. I guess we all have to make a buck.
amreboot: (2012-02-02 16:03:46)
[quote]1986zxt wrote: [quote=reddzx]
Probably won't notice much without other accompanying mods.
At what level would this make a significant difference or would it? Zack indicated it would bring 7-10% based on the mods I have currently. I guess we all have to make a buck.
For starters, ICing, safe boosting (stock t3 = 12psi max).
Intake, exhaust, the basic stuff.
If you get Nistune, bigger injectors, and a bigger turbo, you'd be doing well.
sbs z31: (2012-02-02 16:38:46)
You can't just expect to slap it on and gain that 7%-10% gain without a tune.
1986zxt: (2012-02-02 17:04:07)
As stated before, I do have the intake, exaust (CM 3"), and boost has been increased to 10psi. Obviously that is not enough to generate the benefits outlined by ASCO. Are you saying I should see more with the mods I have or won't see the benefits until I go bigger turbo, bigger injectors and a tune?
-Strike-: (2012-02-02 21:51:06)
I doubt you could really feel much of a difference with 10-20hp gain anyways. You'll probably notice a little more open breathing feeling on the top end, but other than that, without using the plenum as a part of the large scale modifications, i.e, larger turbo, intercooler system, built engine, ported heads and all that fun stuff.
I've wanted to do a gutted plenum, but I know for right now with my current mild modifications, it wont make much of a difference. It may add some bling factor under the hood for the time being, but I wont bother upgrading the plenum until I get into the stages/modifications I listed above.
Not saying that you wasted your money. A gutted plenum is a great investment, and will definitely do you justice for now, and any future mods you throw at it. The 7-10% increase is probably accurate on the top end, but if you can actually feel it on the butt dyno, who knows?
1986zxt: (2012-02-02 22:16:36)
Thanks for the reply. Makes sense. I guess I got into premature plenum aquisition. Not feeling much on the butt dyno. I just increased boost by 3 lbs about 4-5 months ago. Definitely felt that.
michaelp: (2012-02-02 22:42:06)
[quote]1986zxt wrote:
I doubt you could really feel much of a difference with 10-20hp gain anyways. You'll probably notice a little more open breathing feeling on the top end, but other than that, without using the plenum as a part of the large scale modifications, i.e, larger turbo, intercooler system, built engine, ported heads and all that fun stuff.
I've wanted to do a gutted plenum, but I know for right now with my current mild modifications, it wont make much of a difference. It may add some bling factor under the hood for the time being, but I wont bother upgrading the plenum until I get into the stages/modifications I listed above.
Not saying that you wasted your money. A gutted plenum is a great investment, and will definitely do you justice for now, and any future mods you throw at it. The 7-10% increase is probably accurate on the top end, but if you can actually feel it on the butt dyno, who knows?
Thanks for the reply. Makes sense. I guess I got into premature plenum aquisition. Not feeling much on the butt dyno. I just increased boost by 3 lbs about 4-5 months ago. Definitely felt that.
3-4psi of boost increase is like a 40-50whp gain. A gutted plenum is like 10whp maybe....Dyno it before and after. Butt dynos suck for accuracy. :nanan?re
1986zxt: (2012-02-03 15:07:25)
[quote]michaelp wrote: [quote=1986zxt]
I doubt you could really feel much of a difference with 10-20hp gain anyways. You'll probably notice a little more open breathing feeling on the top end, but other than that, without using the plenum as a part of the large scale modifications, i.e, larger turbo, intercooler system, built engine, ported heads and all that fun stuff.
I've wanted to do a gutted plenum, but I know for right now with my current mild modifications, it wont make much of a difference. It may add some bling factor under the hood for the time being, but I wont bother upgrading the plenum until I get into the stages/modifications I listed above.
Not saying that you wasted your money. A gutted plenum is a great investment, and will definitely do you justice for now, and any future mods you throw at it. The 7-10% increase is probably accurate on the top end, but if you can actually feel it on the butt dyno, who knows?
Thanks for the reply. Makes sense. I guess I got into premature plenum aquisition. Not feeling much on the butt dyno. I just increased boost by 3 lbs about 4-5 months ago. Definitely felt that.
3-4psi of boost increase is like a 40-50whp gain. A gutted plenum is like 10whp maybe....Dyno it before and after. Butt dynos suck for accuracy. :nanan?re
True enough. It definitely helped mid range and top end repsonse. It pulls hard/harder to redline. A nice addition indeed. A fairly expensive one but nice. I'm enjoying it.
Crazy: (2012-02-04 00:16:57)
Hugh differance on modded motor.... cams p&p heads exhaust and a 58mm turbo.....