there have been many discussions...way too many...on intakes and many arguments on which ones get gains and how much. i guess it is pretty much accepted that the 350z tube and the JWT pop are the way to go. but i remember that there used to be quite a handful of people who swore by the Stillen High Flow. What happened to you guys? and did we ever reach a final conclusion to whether the stillen actually gave more hp or stole hp. so sorry to add another intake post, but i feel we need some closure to this.

G35S 6MT
Technosquare ECU
350Z Springs & Struts
6-wire ground kit

 

nuttyprof,

In previous thread/post discussions I provided pictures and expressed the opinion that Stillen's CAI is essentially identical to the JWT Popcharger w/heatshield. This may sound familiar to many. Both CAIs have a velocity ring, a large conical air filter and a heat shield. Stillen's air filter is red, JWT's is blue. Stillen's heatshield is plastic, JWT's is steel. IMO, if the red one makes or loses power, then the blue one will do likewise.

By the way, what happened to your previous CAI?


DaveO
2003 G35 Sedan - DP / Willow / AT / Premium / Sport
350Z Engine Cover, T-Stat & Air Duct / Stillen CAI
GG 7-Wire H-G Kit / TechnoSquare ECU
Street Edge TC / B&M Cooler / Stillen Exhaust

 

I agree with DaveO. The design of both intakes is similar and I believe should produce similar results, whether positive or negative.

Take care,

amG35
2003 Silver Sedan

 

I am a strong supporter of the Stillen.Z-Pipe combo. I have been using the combo for about 9 months now. I don't like posting opinions anymore about the competition because there is always someone who doesn't agree. People will buy what others say is good at the time. Now the new thing is the pop charger. What new members don't realize is that Stillen has been one of the first dyno proven safe intakes out there when JWT had nothing to offer at that time. Not even K&N did. IMO K&N and JWT have waited too long (which forced some people to buy Stillen) to put out a product which gets no respect from me. Hell, JWT doesn't even have an original design. It was taken from Stillen. How lazy is that? I stopped long ago wasting my time posting about CAIs. Some people don't even spend the time doing a search. They start another CAI thread.

IMO Stillen is still the best designed, safest against engine hydro-lock, and ORIGINAL design CAI out there for our Gs. It is made in American too!

 

i definitely agree that the designs are nearly identical and ShoulD produce nearly identical results, but so far, nobody has said anything negative about the JWT dyno-wise. IMO, the metal heat shield has got to go. as for the stillen, many claim that you actually lose hp, despite the fact that you get a plastic heat box.

as for my K&N intake, i sold it becuase i had planned on making a custom carbon fiber intake with a heat shield, which my K&N lacked.

oh yea mbarrad, although the Stillen came out first, it costs about an extra hundred bucks compared to the JWT... big difference.

G35S 6MT
Technosquare ECU
350Z Springs & Struts
6-wire ground kit

 

nuttyprof,

IMO, a JWT Popcharger without a heat shield will be a HAI (hot air intake) system.

Your comment "as for the stillen, many claim that you actually lose hp, despite the fact that you get a plastic heat box." Please define "many" and also provide copies of dyno charts, websites, links or other that support your statement.

Thanks,

DaveO
2003 G35 Sedan - DP / Willow / AT / Premium / Sport
350Z Engine Cover, T-Stat & Air Duct / Stillen CAI
GG 7-Wire H-G Kit / TechnoSquare ECU
Street Edge TC / B&M Cooler / Stillen Exhaust

 

I am curious to find out if the JWT pop charger has the same engine stalling in neutral problem that some people with Stillen high flow had.

------------------------
Mod: Borla exhaust / Nismo sway bar / Z duct / Amsoil air filter [img]/w3timages/icons/laugh.gif[/img]

 

G35Newbie,

Me too. But don't forget the Injen problems as well as some cars with stock air inlet systems.

Reference: My350Z forum, and to a lesser degree, G35Driver forums.

Recommended solution;

1 - Complete the "Idle Air Volume Learning Procedure"
and/or
2 - An ECU reset.


DaveO
2003 G35 Sedan - DP / Willow / AT / Premium / Sport
350Z Engine Cover, T-Stat & Air Duct / Stillen CAI
GG 7-Wire H-G Kit / TechnoSquare ECU
Street Edge TC / B&M Cooler / Stillen Exhaust

 

I support the Stillen CAI with Z tube for those that do not want a long tube CAI. Though I'm tempted to pick up a JWT pop charger to see for myself how well it does or does not seal off injestion of hotter underhood air.

"All that's necessary for the forces of evil to win in the world is for enough good men to do nothing.”
Edmund Burke

G35 6mt

 

Until the filter is completely enclosed and drawing air from the ram air ports, the benefit of a simple, open-sided "heat shield" remains questionable IMO.

2004 | 6MTs | Diamond Graphite/Graphite
Upstate NY

 

I have not noticed the stalling problem with the POP-Charger. I brought it up to 80, threw it in neutral, and it settled down to idle speed.

Lou

 

If you want dyno sheets showing loss of hp & tq call Yuichi he'll tell you what was lost and how much.I live/deal with the high flow box evreyday...10 hp gain my a$$.

03.5 Sedan/B. Silver/Prem/Winter/Aero/Tint/Rims
69 Chevelle Hard Top BB/4.11's/Posi

 

Huh?

Lou

 

The high flow box dosen't help...it hurts-response to DaveO's post on needing dyno sheets showing gains or losses as proof.

03.5 Sedan/B. Silver/Prem/Winter/Aero/Tint/Rims
69 Chevelle Hard Top BB/4.11's/Posi

 

I have the Stillen high flow box and haven't noticed or felt any loss of power but felt slight improvement butt dyno wise. There seems to be some talk of Crawford and/or Yuichi having dynoed w/ the high flow only to lose hp. My question just like Dave O. is where is the mysterious dyno? Was it tested on a Z or a G? Engines are similar but doesn't the Z already have a better intake than the G (I could be totally wrong)? Isn't the velocity ring and the cone K&N filter supposed to be better than a paper filter? The high flow box doesn't extend any further out then the stock set up and doesn't have its own tubing. It's basically just a cone K&N filter, velocity ring, & a plastic heat shield. How is that worse? If the pop charger is basically a similar set up to the Stillen, then how is it better performance wise? Is it because one is made by Stillen and haters hate Stillen? A possibility.