About Fitting Tomei Poncam

[Alfred Y]

Hi everyone, I don't know if I ask this question in the right place?

I am prepare to purchase a set of Tomei Poncam for my 98 GTT, just want to ask if I replace the stock cams, do I need to change the cam gears as well? Or I can run with stock cam gear?

Thank you everyone.

[DVS JEZ]

U can run with the stock cam gears if u wish. Make sure the inlet poncam can be used with ur stock variable cam gear before u purchase.

Some people say there is no point running adjustable gears on tomei cams but i have found gains with adj gears

[boostn0199]

Its not a neccessity but doesnt hurt to just chuck one in if you got the spare money for it.I chucked one in my r33 when I did them but I gained response on standard cam gear setting and didnt get any gains from it so its up to you.

[Alfred Y]

U can run with the stock cam gears if u wish. Make sure the inlet poncam can be used with ur stock variable cam gear before u purchase.

Some people say there is no point running adjustable gears on tomei cams but i have found gains with adj gears

I am going to purchase the Type A Duration Intake: 252 Duration Exhaust: 252 Lift Intake: 9.15mm Lift Exhaust: 9.15mm. I might try the stock cam gear first.

Thank you everyone!

[magic1]

that is a big lift, are you going to change valve springs too?

[Simon-S14]

if they are poncams you dont need to change the valve springs..

[radianation]

When I installed the poncams on my 25 I bought adjustable cam wheels. Ended up only using the exhaust side because the intake side would have required me to disable the VVT, which is quite effective. So I would only get the exhaust wheel.

[Alfred Y]

Because I have my major service coming up so I want to do some little mod to the car at the same time. My aim is to make the 34 be more responsive and carry out the full potential of the Neo engine. My other part are full 3 inch turbo back exhaust, intercooler, evc and planning to run 14psi at all time. And I saw this cams from the Tomei web site, it claim that it will increase the low and mid range torque with stock ecu and stock turbo. Therefore I just want to know if this will fit my plan and what other little pieces I have to aware for? Thank you

[Simon-S14]

if your running a stock turbo personally i would not spend the cash on cams. get a retune and that will make more of a difference then anything. save for a larger turbo if you want more

[Beer Baron]

dude, cams on a stock ECU will be a waste of time. instead of spending money buying cams and cam gear and having them intalled (going to run close to $2K all installed). instead get a nistune or power FC and have it tuned. you'll get much better gains that way. putting in some aftermarket cams without re-tuning will have the car making LESS midrange and low down power. getting a tune on the other hand will give you more power EVERYWHERE including low down and midrange. at the most just get an adjustable exhaust cam gear and have it adjusted when you get the tune.

[boostn0199]

Yeah cams are sort of like the last thing you do after youve done all the basic bolt ons and just want to improve mid range abit. Definately not a starting modwaste of time if dont have all the suporting mods.

[Beer Baron]

apart from that with a stock ECU the car will be much worse than it was everywhere. they change the way the engine breathes. with that change you MUST alter the tune. with a stock ECU it's going to be terrible.

and even if you had all the other gear they are not likely to improve response/low down power. they shift the powerband and in this case they'll be shifting it further up the RPM band, not further down.

spend the money on an ECU and tune instead. that will give you actual good results. you car will have more power everywhere and most probably better economy too.