R2C, Stillen HFC & Stillen exhaust dyno pull

280z/300zx · 06-13-2010, 08:27 PM

Quote:

Originally Posted by Chriz

take your rc2s with you and bolt them on after the baseline and dyno again

Exactly, unless you do a before and after the same day all you will have is speculation. If you are going to go through the hassle of another dyno with the stockers on, might as well stay around another 30min and do a 2nd dyno with RC2's installed for a proper before/after test

terbo · 06-29-2010, 09:01 AM

So far do you prefer the car with the RC2s or with the stock intakes? I ask because I am considering purchasing the RC2 intakes within the day.

JvKintheUSA · 06-29-2010, 09:58 AM

Quote:

Originally Posted by terbo

So far do you prefer the car with the RC2s or with the stock intakes? I ask because I am considering purchasing the RC2 intakes within the day.

The R2Cs are nice intakes, but I'm not sure if they gave me any gains. Maybe a few HP at top RPM. After I took the R2Cs out, I noticed that one of the seams on one of the heat shields was cracked. For now, I'm staying with the stock intakes and bought some HKS drop ins from AAM, and now some intake tubing from CorSport Inc.

terbo · 06-29-2010, 01:53 PM

Quote:

Originally Posted by JvKintheUSA

The R2Cs are nice intakes, but I'm not sure if they gave me any gains. Maybe a few HP at top RPM. After I took the R2Cs out, I noticed that one of the seams on one of the heat shields was cracked. For now, I'm staying with the stock intakes and bought some HKS drop ins from AAM, and now some intake tubing from CorSport Inc.

So you're saying I should keep my $500. Gotcha, thanks

JvKintheUSA · 07-18-2010, 10:39 AM

I had my car dynoed yesterday at Forged on the same dyno I dynoed it early June. Since the first dyno, I removed the R2C intake, put in the stock boxes, replaced filters with K&N drop ins (the HKS filters I ordered from AAM were on back-order and to this day AAM has not credited my $64 - shame on them! So I bought K&N) and got HFS post-MAF tubes. I also got a canned COBB tune for HFC and CBE. Temps were about the same; high 70s to low 80s, but higher humidity. Result: I lost almost 20 HP at about 5,400 RPM and about 10 at max RPM. In all honest - the car doesn't feel like I lost, rather with the COBB tune, I feel more torque, but that went down by 10 Ftlbs. With the COBB tune, the car has a better A/F ratio and fuel trim, so I don't think I can blame the tune for the loss. But I doubt that the R2Cs gave me an extra 20 HP, so I'm a little confused...car feels torqier, but numbers are down. I might throw the R2Cs back in and see what happens. I like the K&N Typhoons as well, so I might give those a shot, but waiting for some independent dyno results.

jpit · 07-18-2010, 01:02 PM

Too many variables to accurately gauge what is going on.

JvKintheUSA · 07-18-2010, 01:26 PM

I do not disagree with that ^^

daisuke149 · 07-18-2010, 02:07 PM

Quote:

Originally Posted by JvKintheUSA

I do not disagree with that ^^

i Agree to not disagree with that.

JvKintheUSA · 07-18-2010, 04:29 PM

I just put the R2Cs back in and took it for a spin - intake temps were same as with stock intakes while in motion, power and torque the same according to the butt dyno and A/F was 12.2 at WOT, so that looks all pretty good. Sticking with the R2C for a while.

Zsteve · 07-19-2010, 08:56 AM

Quote:

Originally Posted by JvKintheUSA

I just put the R2Cs back in and took it for a spin - intake temps were same as with stock intakes while in motion, power and torque the same according to the butt dyno and A/F was 12.2 at WOT, so that looks all pretty good. Sticking with the R2C for a while.

Since you have them and they are not losing any power you might as well keep them on. But I think you have kinda shown that the short rams atleast are the same or worse than stock, so some can save some money if they are going to buy the R2Cs just for performance. Bling is another story.

JvKintheUSA · 07-19-2010, 05:14 PM

^^That's the plan for now.

jpit · 07-19-2010, 07:38 PM

Quote:

But I think you have kinda shown that the short rams at least are the same or worse than stock, so some can save some money if they are going to buy the R2Cs just for performance. Bling is another story

I don't think that is the case. He was getting 20 hp more with the R2Cs on. Maybe they aren't responsible for all that gain but they certainly didn't lose anything.

JvKintheUSA · 07-19-2010, 08:28 PM

I have no reason to believe that the R2C lose power. I tested it again today, and the intake temps are the same as with the stock intakes while in motion, the filters are twice the size of the stock (if not more), and the pipes are smoother that the stock hoses. It also runs a tad leaner on the R2Cs. I did a few 0-60 runs today and for the first time (after the Cobb tune and with the R2Cs on) I chirped the tires in 2nd gear (with A/T) - never happened to me before, so maybe I did add a few HP, who knows.

Zsteve · 07-20-2010, 09:02 AM

Quote:

Originally Posted by jpit

I don't think that is the case. He was getting 20 hp more with the R2Cs on. Maybe they aren't responsible for all that gain but they certainly didn't lose anything.

I did say the same or less and Im sure they werent responsible for 20 HP gains.

Quote:

Originally Posted by JvKintheUSA

I have no reason to believe that the R2C lose power. I tested it again today, and the intake temps are the same as with the stock intakes while in motion, the filters are twice the size of the stock (if not more), and the pipes are smoother that the stock hoses. It also runs a tad leaner on the R2Cs. I did a few 0-60 runs today and for the first time (after the Cobb tune and with the R2Cs on) I chirped the tires in 2nd gear (with A/T) - never happened to me before, so maybe I did add a few HP, who knows.

Yea the big filters probably dont need to be that big, the car can only suck in so much air regardless how big the filters are, I did an air intaake reading on my Cobb and was getting like 400 GS at WOT and I dont think the car can suck in any more than that and the K&N filters can flow way more than that. The Cobb tune should have fixed your AF so its not too lean.

JvKintheUSA · 07-20-2010, 08:54 PM

BTW, how do you run an airflow test on the Cobb? I do not recall that being one of the tests you can run, but I'm sure I could be wrong.

07-18-2010, 10:39 AM	#5 (permalink)
JvKintheUSA Enthusiast Member Join Date: Jun 2009 Location: Canton, GA Posts: 465 Drives: 2013 Shelby GT500 Rep Power: 429	I had my car dynoed yesterday at Forged on the same dyno I dynoed it early June. Since the first dyno, I removed the R2C intake, put in the stock boxes, replaced filters with K&N drop ins (the HKS filters I ordered from AAM were on back-order and to this day AAM has not credited my $64 - shame on them! So I bought K&N) and got HFS post-MAF tubes. I also got a canned COBB tune for HFC and CBE. Temps were about the same; high 70s to low 80s, but higher humidity. Result: I lost almost 20 HP at about 5,400 RPM and about 10 at max RPM. In all honest - the car doesn't feel like I lost, rather with the COBB tune, I feel more torque, but that went down by 10 Ftlbs. With the COBB tune, the car has a better A/F ratio and fuel trim, so I don't think I can blame the tune for the loss. But I doubt that the R2Cs gave me an extra 20 HP, so I'm a little confused...car feels torqier, but numbers are down. I might throw the R2Cs back in and see what happens. I like the K&N Typhoons as well, so I might give those a shot, but waiting for some independent dyno results. __________________ Last edited by JvKintheUSA; 07-18-2010 at 10:41 AM.

07-18-2010, 01:26 PM	#7 (permalink)
JvKintheUSA Enthusiast Member Join Date: Jun 2009 Location: Canton, GA Posts: 465 Drives: 2013 Shelby GT500 Rep Power: 429	I do not disagree with that ^^ __________________

07-18-2010, 04:29 PM	#9 (permalink)
JvKintheUSA Enthusiast Member Join Date: Jun 2009 Location: Canton, GA Posts: 465 Drives: 2013 Shelby GT500 Rep Power: 429	I just put the R2Cs back in and took it for a spin - intake temps were same as with stock intakes while in motion, power and torque the same according to the butt dyno and A/F was 12.2 at WOT, so that looks all pretty good. Sticking with the R2C for a while. __________________

07-19-2010, 05:14 PM	#11 (permalink)
JvKintheUSA Enthusiast Member Join Date: Jun 2009 Location: Canton, GA Posts: 465 Drives: 2013 Shelby GT500 Rep Power: 429	^^That's the plan for now. __________________

07-19-2010, 08:28 PM	#13 (permalink)
JvKintheUSA Enthusiast Member Join Date: Jun 2009 Location: Canton, GA Posts: 465 Drives: 2013 Shelby GT500 Rep Power: 429	I have no reason to believe that the R2C lose power. I tested it again today, and the intake temps are the same as with the stock intakes while in motion, the filters are twice the size of the stock (if not more), and the pipes are smoother that the stock hoses. It also runs a tad leaner on the R2Cs. I did a few 0-60 runs today and for the first time (after the Cobb tune and with the R2Cs on) I chirped the tires in 2nd gear (with A/T) - never happened to me before, so maybe I did add a few HP, who knows. __________________

06-29-2010, 09:01 AM	#2 (permalink)
terbo Base Member Join Date: Nov 2009 Location: Louisville, KY Posts: 143 Drives: 09 Nissan 370Z PW M6 Rep Power: 16	So far do you prefer the car with the RC2s or with the stock intakes? I ask because I am considering purchasing the RC2 intakes within the day.

07-18-2010, 01:02 PM	#6 (permalink)
jpit Enthusiast Member Join Date: Feb 2009 Location: Washington State Posts: 440 Drives: 370Z Tour MT w/Spt Rep Power: 17	Too many variables to accurately gauge what is going on.

07-20-2010, 08:54 PM	#15 (permalink)
JvKintheUSA Enthusiast Member Join Date: Jun 2009 Location: Canton, GA Posts: 465 Drives: 2013 Shelby GT500 Rep Power: 429	BTW, how do you run an airflow test on the Cobb? I do not recall that being one of the tests you can run, but I'm sure I could be wrong. __________________

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