Has any 05 owners installed Kinetix v4 plenum? or the stock '05 plenum is good enough? Thanks

 

I've been watching to see if anyone can come up with dyno-proven gains for this engine and any type of plenum/spacer/etc. - it may be that this engine has a redesigned plenum, and an aftermarket plenum or spacer may have minimal, if not even negative, effects on the power delivery.

Haven't seen any data, yet.

 

True. If the polished V4 losses our 298HP, what would be a good second choice as first '05 mod?

 

Unfortunately, I'm not sure and there just isn't much data on where the bottlenecks are in the 2005 design.

My guess is that most gains are due to a new plenum design, and internal engine/ECU tweaks. Meaning that I would assume they probably didn't change any exhaust parts, cats, headers, etc.

I would like to believe that since most of the gains are due to internal differences/ECU/variable exhaust timing, there is still a lot of room to grow with restrictive stock headers, cats, etc. Heck, it'd even be great if the plenum was still restrictive and a new one would add cheap gains like the older models.

Cats would probably be a good start, but who knows for sure.

 

errr..no point, 05's have a revised plenum for increased HP.

 

Does that include G-35's with automatics, or only for the 6 speed manual cars?

 

Is it a fact that the 05's have different lower plenum ?? and like trumperZ06 asked, does this apply to both 6 Speed and Automatic ??

 

then I got no mods to think of but a combine Crawford Hi-Flo cats and Strup 3-1 Stainless Steel Polished Headers.

 

I do not believe there are any bottlenecks in the ’05 as there are few in its predecessors. I guess my question is what is a bottleneck? Is a bottleneck a mishap, omission, or an intentional restriction built into the engine? The eighteen horsepower comes from minor improvements in the plenum redesign, and some type of cam improvements. The old wives tale has been that our cars possess some restricted or undocumented horsepower that is waiting to be unleashed. This is simply not the case. The vehicle is at its apex. The stock N/A G35 (any year) will never see 300RWHP. The only way you will come close to that elusive 300RWHP is if you mess with huge custom cams, forged pistons, and rod kits.

I spent 4,860 on DC Stainless Steel Polished Headers, JWT Cams, JWT Pop Charger, Motordyne Spacer, and Stillen Exhaust, and Race Pipes. All these modifications netted me about 48RWHP. This price does not include the additional $500 on Greddy’s eManage to control the critical Air & Fuel mixture our engines require to manage the additional airflow in and out of our cars.

Logically, take your five grand and dump it into a Stillen Stage 3 supercharger. You be at 340RWHP compared to your N/A 280RWHP.

 

Unfortunately realdieu I am going to have to agree with you. The price per hp for making a N/A G is difficult to justify when you can go FI for the same price. On the other hand when you never dump $5k into a new motor because you blew your other one, that is when you will be thanking yourself. I've done a lot of contemplating about this one.... FI sounds nice and for the guys who never have probelms, great. But there are just too many that have problems to even go there.