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?

???

I had like 20whp from my Stillen G3's....thats a noticeable difference man.

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.

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.

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?

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?

I have yet to see a g3 dyno that showed little gains, find the threads if you can I'd be interested to see. If you look at the the 2 graphs closely you can see he definitely gained good power throughout the entire range.

I'll look at it closer later, but it is hard to tell since one graph goes to 600 HP and the other is 500 HP, it skews things. I'll also see if I can find some of the dyno's of other CAI setups with other bolt-ons, I know there have been at least a few posted.


The best would be to get runs with stock, just K&N Dropins, and then one of the long tube CAI's, all back to back. Someone up for that challenge perhaps? :)

I would if I had a friend with a shop =]

fwiw RCZ dynoed the stock intake vs stock with no filters back to back and saw no gain at all, so I don't think drop in filters do anything.

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

So where do the G3/Injens get their power gains from, if the filter apparently is not the issue? Do they get the gains just from the colder air (which btw on a dyno with the hood open does not really matter IMO), or from the smoothness of the intake tubes? Maybe A/F ratio or something like that - I'm no expert...

what was the HP before the mods

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

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.

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