They never did try the 272I/264E combo, though.

I liked it, but I couldn't really tell a huge difference between any of the cam combos. The air temp had a more dramatic affect than the cams I had installed. I also ran 118.02mph on the straight 264s, but that was an exceptionally cold day. It was in the 30s. It was 68 degrees when I ran the 117.55mph run.

That pass was on race gas. I ran a 30psi spike after a shift, and boost fell to around 24 to 25psi at redline.

On the 118.02mph day, it was cold enough that I could hold 26psi to redline with the straight 264s.

 

Yes the cold definitely could have helped but regardless, still quite fast. Overall, since viewing more of this thread and AMS's camtest page, I can honestly now say I have NO CLUE which set-up to go. straight 264s, 272s or either combo way.. I have the least amount of knowledge regarding the 272/264 combo being no one has really started doing it... any reason why people started? I am wondering if it was a lets just try it or there was some calcuations and thought put into it... the more I tihnk about it and why it could make sense is that STOCK dont the cams have a higher degree for intake than exhaust? like 260/256..? If that holds true then putting the 272/264 combo would definitely make sense and 264/272 combo wouldnt make sense but 264/272 seems to make power just as well as the straight 264s or 272s so... well... Im lost! We really need a comparo like AMS did only using a 50 trim to show the differences! Too bad I doubt it will happen.

 

IF you go with the staggered setup of 264in and 272 ex, it would be wise to get cam gears to dial it in right. the 272 on exhaust side will help the spool, the 264 on the intake side could then be sync in with the 272 using ur cam gears to maximize the mid to high end powerband. you should also look into getting a intake maifold we are testing one now and it should yeild 40 whp and with larger throttlebody yeild atleast 60whp. Will let you know once the dyno tests are done. if it works all those that want one can pm me to get it.

 

There isn't much difference between the 264/272 and 272/264 because the overlap is all the same. The only other significant difference between them is the difference in point of the intake valve closing, and that apparently amounts to peanuts in a real world setting.

With the split setup, installing both cams on the same lobe centers (e.g. -3/-3) is a safe bet. One can play with settings such as -4/-1 or -4/-2, and the differences should be roughly equivalent to the same with the 272 set (a little later spool, a few more peak hp).

As for 'EVO Voodo's post, I am very doubtful of 40whp from an intake manifold swap, and even more so of an extra 20whp from a TB change, simply because there are cars running into the limits of the factory turbo without those items. So to that I say 'good luck' and we await your results.

 

I am very happy with my 272i/264e combo. my car spools up faster than my bro who is running straight 264's. Even if straight 264's have more torque, I still beat him in the 60f mark and top speed at the track. we both have practically the same mods. the main dif is he has a JIC 3.25 cat back and I have the HKS 3 in catback. ohh and I have the hks suction kit and he has an RMR intake.

 

Why does everyone listen to people that have no experience or no track results and use thier word as magic? I know a number of guys that DO have lots of track results hitting in the 10's and they are all using 272/272. Of course these are cars designed for the track... if you really give a crap about a GREAT idle and 3 HP on the bottom then get 264/272. If you dont plan on upgrading much get 264/264 but I dont think that setup would be worth the 6 bills and the labor to put em in.

 

264/264s have yeilded 30+whp and 30+ft/lb of TQ.. thats not worth 6 bills?

 

600 plus the labor to do it... 30 is a good amount but I think normally people that get that much out of them are adjusting the timing with gears... I could be wrong though. I would rather use 272/272 personally.. thats what I got and I like it To each his own I guess.

 

Nah, no one gets that out of gears, not even close. 264 and 272s are just a preference. I know I am going to get 264/264s because I like response and torque, other people who want just that top end, they might prefer 272s. But in no way are the 264s "not worth it"

 

soon2, I believe Trina is talking about 264s yielding 30hp gains with adjustable gears not just the gears alone.

Trina.. I have to ask you about the 10s with HKS 272s. Would you please share what the supporting mod.s are that allow such ETs with these cams. Also what do you like the best about your own set up with 272s?

 

Just go straight 272's they work great.

 

I would not compare cam profiles to funnels. It is more than duration and lift to make a cam. JUN and HKS have similar specs ( lift and duration) but the JUNs pull like a **** compared to the HKS.

I would say call AMS and ask them, they have tried many combos on their dyno.

 

I have not seen any data that supports this statement. I have however seen data that points to the contrary.

 

do you mean on the stock turbo can pull out that much whp with 264s cam setup?

 

Depending on application, and I dont just mean peak by saying that but midrange and what not. There is a guy on here, I think his name UMIAMI or something that saw incredible gains. Basic point though - cams add a lot of power. 264s give better midrange while 272s give that superior top end, but you cant go wrong with either, they both are worth the money!