I am very intrested in getting bigger cams for my X. I wont be upgrading my turbo for another year or two probably closer to 2. I was told that GSC S2's (274) would be fine as long as i had a good mivec tune. Could i go bigger then 274? I would be going to AMS for the tune and most likely have them install them too. What are your thoughts on bigger cams. Would probably replace the springs and retainers as well as new arp studs. I understand the awful driveabilty you have at low rpms but im ok it that i rarely am every in stop and go traffic.

What about AMS cams are those strictly for an upgraded turbo?

 

You will get bigger gains for the same or less money with an upgraded stock frame turbo. I know that is not what you asked but.... I went cam route and did not get my money worth on my X. IMO do a BBXL first and cams latter...

You will see gains across the powerband with cams even on stock turbo but.. the stock turbo does not really flow enough for the power not to peak real early with bigger cams.... In other words you may see a gain of 30whp across the rev range, but the power may also peak at 6,500 rpm ...

On the other hand a bbxl with stock cams will gain more than 30whp and the peak power will be at the rev limiter.

 

Cams shift were the power is made and the shift is up. As the stock turbo runs out of breath at 5k cams dont really do much and cost alot. I would put my money else were. Once you upgrade your turbo to something that can make power in the upper rpm range, cams will make a big difference.

 

My mx1s didn't really give much in the way of peak gains, but down low the extra torque is immense

 

Some extra torque down low would be nice and ik i wont get tramendous gains on a stock turbo. I just am wondering how safe and how big I could go i.e. 272?274?280??? (is that too big?) I do plan on upgrading my turbo and i may just do that first but like i said i am just wondering if its safe to go with bigger cams on a stock turbo??????
I also love how bad *** cams make ur car sound espically at idle.

 

Any one else have any other input on doing this???

 

You should call map performance or spec ops motorsports and talk to them. Both very good peoples with extensive knowledge on this. http://www.specopsmotorsports.com/ http://www.maperformance.com/

 

Jeff Pippi out i'n Canada here is running full bolts ons and te mx1"sand has won 5 time attack events straight going for 6 tomorrow.

Compared to my mr his car down low rips away down low and have to play catchup always

I'd think mx1 on stock turbo is a good choice an u can still use with a bigger turbo later

 

http://www.roadraceengineering.com/d...HTUNED-375.jpg

This should give you an idea of what a fully tuned cam can do on the stock turbo. This is from RRE, so you know its not some BS. As mentioned, not much change on the top end, but the mid range is whole new BEAST!!!
Of course, different cams w/ tuning can shift that gain to different areas as need be.

 

what cams where these, that is actually a pretty good improvement, would be great for AutoX

 

as many say it here you dont get those peak numbers, as you would do with a turbo upgrade. But a same time u will get a much more and more frequently used mid-range power. For me is way more important then a peak numbers. Also the whole power curb will be much beefier.
So yes it is a good investment, but you should not get 274's for stock turbo. Unless you are planning to get a turbo upgrade later. I would go for a Cosworth cams for stock turbo max. You should get something around 264 for stock set up if the cosworth doesn't fit for your budget.
I am always doing the same way . The last i upgrade on the car is the turbo. There is sooo much more you should, and can do with the engine before you start running bigger turbo.
But of course that is my opinion only.

Rob

 

I want to get the 274's cause i do have plans for a bigger turbo down the road just might take a year or two to get it (gotta buy a house first). So I wanted to get a Stage 2 cam so i wouldnt have to worry about getting something bigger later. I was told 274's with a good tune will be fine.

I would also like to know what cams RRE was using for that evo. Those are solid numbers for a stock turbo.

 

if you have a plan for going bigger turbo then yes get a 272"s. or higher. I do beilve the 280"s are just too big for 99% of the applications.
There is an interesting combo also you might consider, is the 264 exhaust and the 274 intake
I runned 274 's in my VIII on stock turbo, worked great. And those engine are basically handy capped vs the 4B11. The dual mivec and the turbo is a big plus in the 4B11. for a bigger cams. Also the better flowing head design.

Rob

 

Nah is not worth it bro i did put on my car G1 cams on the stock turbo and did not saw the number that i want it it stay pretty close to same number i already had it before. If you gonna do it right do turbo and G2 cams with valve springs and retainers.