The IXs wont pick up as much power over stock as a VIII because the IX cams are a bit bigger from the fac and also with the MIVEC its dialed in fairly well on the stock cams. True, for example a HKS 272 cam in a VIII will produce better gains over stock but have more lag. A HKS 272 in a IX will produce gains but maybe not as much as the VIII did, but the IX won't loose any spool because of MIVEC. Now this opens a new can of worms...

MIVEC... still remains as one of the hardest things for people to tune and grasp. For example if you go to "shop #1" with a set of S3s and the tuner is not that savy with MIVEC then your gains will show that! If you go to "shop #2" with the same cams and mods but the tuner is a god at MIVEC you may gain spool and topend (more horses) with a more usable rpm range. MIVEC can make a car shine or can kill it. Just keep that in mind when you see people post about cams for a IX. If you don't personally know the tuners MIVEC experience then, I for one, take that for a grain of salt.

When looking for a good set of MIVEC cams. The only two on the market that I would buy would be the S2s or Kelford 272s (both of which you should have valvetrain regardless what people say; these cams are made to rev. If you are only going to rev to 6800 then get a domestic!) On a serious note, the S2s and Kelford 272s will have a pretty close topend overlay but the Kelfords, from what I have seen, spool your turbo better and produce a stronger midrange hp&tq.

Another note i want to make is, a bigger cam will move your powerband to the right. Depending on the cams, it can be anywhere from a couple hundred rpms to a thousand+ rpms. That stated, the stock cams are made to rev/make power upto 6.5-6.8rpms. It's runny how people will throw in, for example, a S2 and only rev to 6.8-7k, because they didn't want to pay the money for the aftermarket springs, give me a break! This is what's funny because the S2s move your powerband to the right about .5-1k rpms. If you shift at 7k your not taking full advantage of the beautiful cams that you just paid an arm and a leg for. There are a few exceptions; like running the stock turbo. It doesn't matter what cams you have, that turbo won't pull to 8k with a very usable powerband.

As I just stated above in bold.... almost any cam you can throw in your car but you won't be able to rev where you need to on the stock valvetrain. The only cams that I would suggest on stock valvetrain for a IX would be: HKS , BC, Crower, and comp cams. Yes you can use a 280 on stock valvetrain, just in case that is the next question. Most people on stock valvetrain run HKS cams. IMO they have a better power band than the other stock valvtrain cams and you can rev them to 8k on stock valvetrain.

For your video of S1s you can go to youtube.com The only people that should be looking for S1s in my opionon are people that stick with a small turbo, don't want to loose spool, and don't ever plan to rev out the roof. This means only road racers/autocross/time attack.

Good hunting and I hope I could help answer your questions!

 

great info^! i want cams, but i also like the low end power wayyyy more then top end. I never ever want to sacrifice spool for top speed. People say the s1 wont lose any power doen low, is this actually true?? or just a theory? Also where do they shine? mid range power?Im going to buy a bk full in the near furute btw so looking for a cam that pairs nicely with the intentions stated above.

 

Mellon's experience tuning MIVEC is self-evident. Some cars on our local dyno were tuned by the most respected names in the Evo world. As I said, the results have not supported the idea. Mind you, I'm referring to IXs with stock turbos.

You may want to have a look at my dyno thread and another posted a couple of weeks earlier. It'll be easy to identify. Both cars ran on the same dyno, except mine was there on a much more humid, ~20* hotter day. My IX has virtually nothing. The other IX has Kelford 272 with valvetrain upgrades and a whole slew of bolt ons. Both cars ran @ 24PSI on 93. Check out the results.

 

The other thing about cams, just like everything else... You need to have the right combos for everything to work. It's not just like throwing things together like my fiance makes dinner.... That never turns out good

 

Folks whose advice is regularly asked for on this very forum, as well as on the (EvoM) tuning boards. I won't mention names.

Yea, you're right. Every IX that was tested on the dyno had the wrong combination of parts, even though the parts were sold by respected vendors for use with the cams.

Please don't misunderstand. Like you, I'm also very interested in improving the performance of my Evo. At the same time, I have no desire to mod for the sake of modding. I'm perfectly capable of dissecting information and applying critical thought, and I get paid very well for doing it. It's unfortunate that the actual results have not supported individual claims regarding these products on stock IX turbos running 93.

 

Yea, you're right. Every IX that was tested on the dyno had the wrong combination of parts, even though the parts were sold by respected vendors for use with the cams. Happens everyday

The thing people have to understand is that vendors will swear up and down about their products. Like expected, because if they didn't sell they wouldn't have a business. Not every product made and tested is a good product though. Large cams like a lot of air and high boost! bottom line!

 

...I tried.

Best of luck to you.

 

you too bud

 

FP specifically designed the 4R EVO IX cams for their big bolt on turbos. Why not just get those if you are going to use their turbo? They have a significant amount of time in R&D behind them on their test EVO. Call Robert and ask him how their parts work, the engineer they have working on the test car is one of the best DSM/EVO/4g63 guys on the planet.

 

That supprised me that no one was responding on the fp cams. they are at the top of the food chain in the dsm world. I Dont think that I would do anything else on my dsm now that I have ran them. And for the record I have personally owned HK$, jun, bc,fp,and Web.

 

I have wondered why everyone on here doesn't talk more about FP products as well. In the past 7 or so years I've seen of many "Vendors of the week" go in and out of style. The conversation usually goes something like this:

"Should I buy the XYZ Super-whizbang product, or should I buy the FP product?"

As an observer having watched this go on in the DSM/EVO world I've seen this question posted many times. The funny part is that company XYZ always changes, but it's always being compared to FP. I think that should tell people something right there.

 

will the s2's or kelford 272 work with a stock turbo? also what company do u recommend for valve train components? supertech?

 

Most def! There are lot of people on stock turbos have nothing but a on their face!
supertech, behive.... there are tons. They are all pretty decent.
As a few post before, yes you can get a FP4R if you would like. I believe they are more than the GSC or Kelfords and that may be the reason why people don't mention them much... With the economy crisis, you can get just the same results out of a GSC or Kelford

 

iight cool thanks for the help.

 

again, often you get what you pay for. some things you can cheap out on and others you can't (or shouldn't) from personal experience cams are one thing I won't!