Funny thing is that for many years now all major domestic camshaft manufactures have always had their forced induction camshafts with a longer duration intake. Oh and don't forget our buddies across the ocean who also run the longer duration intake camshaft and love. Also not to forget that the exhaust flows very fast and at a much higer temp than intake. By allowing the intake cam to stay open longer you are increasing the amount of air in (duh) and by running the smaller exhaust cam the exhaust gas speeds are really quick
which spools the turbo very fast. We have used this combo on a few evos now, and with stock turbo have seen no difference in topend over the straight 272 combo. It
has been my opion and still is that the 272in 264ex makes the best power on stock turbo. But for larger turbo applications run the straight 272's. If you were ever to drive a car with the two diffent combos you would be amazed by the low and mid range power of the 272in 264ex combo, while still hanging with the the 272in 272ex cars on topend. But then there are always people who just want to see dyno graphs of the two combos with we are working on.

 

thanks Doug, I was just about to tell them to contact you about this, plus you just saved me from having to explain it. Dragon you did not offend me in anyway, you just didnt give me the chance to explain before calling it retarded. no hard feeling here, hell give it a try sometime, or Ill give you a ride in my car is this what Im going with since I plan on having the stock turbo for a long time. Doug so you got me some cams yet so we can get this going?? lol

 

Instead of changing the valve springs, I would just use that money to upgrade the Head studs. you'll need this more than changing the valve springs. But if you have the extra cash to do change the studs & valve springs, then go for it

 

Does the 272/264 combo causes rough idle like the 272/272?

 

Yes!! It is actually a little more aggressive, like a V8 with a massive cam lope. I tend to like it however. It is easily corrected with a standalone like an AEM,etc, and nicely aggressive with a piggyback like an emanage. Just remember if you want power you are normally going to have to sacrifice something.

 

im considering getting the HKS 264/264 cams. it seems like everyone mixes and matches these cams. if i go with a straight 264 combo, will i see decent gains? how about idle....smooth?

 

Boost solutions liked it so much they never posted the dyno charts as promised...

 

Lol.

 

**** dyno charts....I have been in several cars with it and it hits very hard, the wheels bark with the first 3 gears. Its like launching 3 times in a row. Do what you want however!They all work!!!

 

I know i am digging this post up from the dead , but couldn't you use cam gears with straight 272's and retard the exhaust cam more than the intake side to duplicate the 272 264 setup.

 

You can't change the duration of a cam with gears. Only when it begins to open. Not the same.

 

Dohh,, You're right.