Opinions: ASCO Plenum - Z31 Performance

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1986zxt

Senior Member

Posts: 482
#16

02-02-2012, 12:04 PM

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?

1986zxt w/ '86, 56k mile, na engine (turbo bits swapped), K&N intake, 3" CM Performance turbo-back exhaust, Eibachs, KYB shocks, Front Mount Intercooler (2.5" plumbing), Turbosmart MBC/9 lbs, recirculating BOV, ASCO plenum, dual fans, Maxima alt, Champion 3 row Radiator.

2013 Ford Taurus SHO Performance Package
-Strike-

Senior Member

Posts: 1968
#17

02-02-2012, 04:51 PM

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

Senior Member

Posts: 482
#18

02-02-2012, 05:16 PM

-Strike- 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.

1986zxt w/ '86, 56k mile, na engine (turbo bits swapped), K&N intake, 3" CM Performance turbo-back exhaust, Eibachs, KYB shocks, Front Mount Intercooler (2.5" plumbing), Turbosmart MBC/9 lbs, recirculating BOV, ASCO plenum, dual fans, Maxima alt, Champion 3 row Radiator.

2013 Ford Taurus SHO Performance Package
michaelp

Senior Member

Posts: 9384
#19

02-02-2012, 05:42 PM

[quote]1986zxt wrote:

Originally posted by -Strike-

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

- VG30DET (HE341) 86 300ZX - 1982 280ZX Turbo - Headered NA 1986 300ZX 2+2 - 2000 Xterra -
1986zxt

Senior Member

Posts: 482
#20

02-03-2012, 10:07 AM

[quote]michaelp wrote: [quote=1986zxt]

Originally posted by -Strike-

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.

1986zxt w/ '86, 56k mile, na engine (turbo bits swapped), K&N intake, 3" CM Performance turbo-back exhaust, Eibachs, KYB shocks, Front Mount Intercooler (2.5" plumbing), Turbosmart MBC/9 lbs, recirculating BOV, ASCO plenum, dual fans, Maxima alt, Champion 3 row Radiator.

2013 Ford Taurus SHO Performance Package
Crazy

Senior Member

Posts: 619
#21

02-03-2012, 07:16 PM

amreboot wrote: 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.

Hugh differance on modded motor.... cams p&p heads exhaust and a 58mm turbo.....

Black 1986 300zx Turbo coupe (Chuki)
http://z31performance.com/showthread…86-Turbo-Coupe
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Pewter 1986 300zx N/A 2 Turbo 2+2 (Chuki)
http://z31performance.com/showthread…9;s-1986-300zx

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