R2C, Stillen HFC & Stillen exhaust dyno pull

flashburn

20whp because it was your first bolt-on obviously. Once you get HFC's and CBE the performance difference between stock and aftermarket CAI's are pretty negligible.

esfourteen

Do you have first hand proof of this, or are you like the countless number of people on this forum that just keep regurgitating this line and stating it as fact for all new people to read. The general idea that mods HP gains don't "stack" is more or less true, but as far as intakes go on the 370, that is clearly not the case.

Look at semtexs' before/after for example

He picked up gains throughout the powerband as well as a peak of +15whp

Does that sound negligible to you?

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flashburn

People have posted other dyno charts (done the same day) that have showed negligible gains when going from stock to aftermarket while already having the other boltons. I've seen the charts semtex posted, but honestly unless they were done on the same day, I'm not going to put much weight into them. Also, on his charts, I can't tell, but are there any gains mid-band or is it all at peak RPM? If there are gains but they are only at redline, who cares?

JvKintheUSA

Does it matter what gear the dyno run was done?

Never mind - I found the answer: 5th gear with the A/T will cause the engine to cut off at about 7k and 160 MPH.

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JvKintheUSA

I got myself a Scangauge to check the intake temps and they were 11-12 F below ambient temperature. At highway speeds, the outside temp was 88F-89F and the intake temps were 98F-100F. They rose quickly to over 150F at standstill. Anyone know if that difference between outside air and intake air is a lot for short intakes? What are the Stillen G3 and Injens outside/intake air temp differences?

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jpit

The Takeda short intakes (no heat shield) had intake temps 30 degrees above ambient temps. I have the R2Cs (with heat shields) and my intake temps are 8-10 degrees above ambient temp. I also have the Modshack vent mod and this definitely helps lower the temp.

JvKintheUSA

I might fill my front bumper with ice to get lower intake temps...

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jpit

Here is a G3 dynoed on an automatic done by a respected tuner. It lost power over most of the power band except at the top end. When he removed the bumper it tested
much better. Also, Tony at Fast Intentions has not had good luck with the G3 at all.

The forum doesn't allow a direct link to 370Z.com, so change the 370x to 370z.


http://www.370x.com/MagazineArticles...no-Thrash.aspx

ERZperformance

what was the HP before the mods

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JvKintheUSA

I might put the stock intakes in this Friday and do another dyno run next week, if I can get Dyno time on the day that I am off. Then the whole R2C gains issue should be settled.

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flashburn

Can you do a before/after run on the same day?

JvKintheUSA

Prolly not..too much work to do all that in one day - for me at least. BTW, on my way back from work with 79F ambient temp, I got as close as +6F on the intake temps. Not bad IMO. Sorry for the bad pic.

Attached Images

IMG00130-20100609-2131.jpg (141.2 KB, 16 views)

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Red370

of course on a dyno the intakes arent going to show high numbers, even with the fans, it will never accurately simulate the vehicle being in motion. Combined with a tune, the intakes, hfcs, and cbe combo produce a VERY dramatic increase in power, there are dyno charts all over this forum, guys with Uprev tunes, Cobb tunes, with said mods, with my AP, my inlet temps averaged between 5-8 over ambient, that in itself tells me that cooler air is getting in, which leads one to believe that power is being made. Lets not make uneducated assumptions based on the opinions of others when there are facts with results all over this forum gentlemen, use the search function.

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JvKintheUSA

Okay, I put the stock intakes in my car and I will dyno the car with the stock intakes on July 17th at Forged. I drove around for about 40 miles this afternoon in 92F weather and the intake temps were about 8F above ambient temperature. The biggest difference I noticed is that while idle at the light, the intake temps do not rise as fast and become not as high as the R2Cs intake temps, which rose to 150F. Today, with the temperature about 10F higher that earlier in the week, the intake temps at the light after a few minutes rose to about 115F. The butt dyno did not notice too much difference, but the car is definitely a bit less loud.

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Chriz

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

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