I just recieved the hks 272i/264e setup, after searching around i am seeing that everyone is using the opposite combo 264i/272e. The shop i bought these from recommended this combo, Is anyone running this setup? Should I have this combo installed or will it hurt performance in anyway? I have been searching around but didn't really find anything to useful on this topic. Any feedback would be really appreciated. thanks

 

this has been discussed a lot.. do some searching..

they seem to like that combo in europe... from what i understand that setup is meant for low down power/torque .. more for rallying etc..

in the US, however, due to the love of drag racing/top speed racing, we like topend power... for this the other combo (264/272) or full 272/272 is the best..

 

probably cant go wrong either way... if u got those cams... they better then not having um

 

That is an awesome stock turbo setup, hits really hard and keeps pulling with the stock turbo. We have done a few stock turbo evo's with the 272i 264e setup and all have been very happy.

 

Thanks for the info! Good to hear that you've had good results with this setup! Do you recommend larger injectors with the cams and a 3in turbo back?

 

Would like to see/hear the results from this set-up.

Have you added the rest of the goodies yet i.e. fuel pump, 3" exhaust, etc....?

 

I would think a lot of vendors would like to sell this package, due to the fact that there are a ton of 272 intake cams and 264 exhaust cams on shelves due to the popularity of the 264i/272e. I personally would not run 272i/264e. No matter what, I want a 264 intake cam. I'll probably get 264s on both sides, but if you're ready to put a 272 on the intake side where it will effect your idle more greatly, you might as well put a 272 on the exhaust side too.

Cliff's Notes: 272i/264e makes absolutely no sense to me.

 

Ding,Ding,Ding, Capitalism at it's finest

For reference, the euro guys prefer Piper or any High LIFT cam. Thats where the torque is at.

 

Boost solutions has some info on this setup in the vendor section, they really like how it works, with the stock turbo.

Noize, your probably right with this setup being popular now that the other combo is virtually impossible to find for the time being.

 

It doesn't make sense to you because you know very little if anything about the valve events and the associated timing for a turbocharged vehicle.

The 272/264 combo makes plenty of sense for SEVERAL reasons:

-The stock config uses more duration on the intake side
-Turbo cars in general like an intake biased split
-Running a full 272 on the exhaust side only increases overlap and blows some of the fresh intake charge out the exhaust before the valve fully closes
-The Euros have been having success with this combo for many many years whereas the Evo has been in the US how many years??
-The exhaust backpressure is higher than the boost pressure for the stock turbo because of the housing size and AR, making any overlap a definate no-no because of flow reversal

So an ideal cam setup for an evo would have relatively low duration, very fast ramp rates and possibly an intake split bias. The tomei procams would be a good choice, as would the Piper cams. However I feel that the HKS cams have way too slow of a ramp rate to be a good choice for the 4G63...

 

A Suwanee supporter from Texas who drives an LS1, huh?

While you're spewing data, show me how many UK cars hold 4G63 drag racing records? Heck, don't just look at Evos on this side of the pond, show me what percentage of the quickest DSMs have used a 272i/264e HKS combination? Show me why proven fast vendors like Buschur, Turbotrix, and RRE don't use the 272i/264e combo?

You are no doubt well aware that gearing is a torque multiplier, so what the heck is wrong with extra duration on the exhaust side, especially when a turbo upgrade likely is in the forseeable future of most people who are dedicated enough install camshafts anyway?

Show me a tuned car with 264/264 and the identical car with 272/264 showing quantifiable gains, then you can call it hard data. Without documented proof, its speculation.

 

The 272/264 combo pulls real HARD, and churps the tires in 2nd. Nah, NOIZE, it doesnt work, Ive just seen it run an 11.9 on stock turbo. well, Ill leave it at that since everyone has already figured out thats all you are is a bunch of NOISE!!!

 

ok.. so it runs 11's.. so have straight 264's with just dynoflash.. what does that prove?

until there's dyno's showing the exact same car with the exact same parts with the exact same climate and dyno... we basically are just speculating..

i'm sure it won't hinder performance at all.. on the contrary, i'm sure it's probably very strong.. especially when tuned well... but is it better than the other combo's? if it idles as bad as straight 272's.. then why not go for the full deal?..

i mean, AMS went 11.85 a very very long time ago with 272's and just an S-AFC2 for tuning... not even a flash!.. full heavy street trim as they always do..

 

Typical B-S hype trying to draw people away from the core point. What cams does Doug's car (the faster one) run?
Remember the thread where the HKS 264/264 cams procured an 11.6 from Buschur's stock turbo car!

11.9x@114? Matt's car is nice, but has been beaten by more than a few. Keep throwing the punches though, this is fun.

 

Ok, on this side of the pond I will bring up more data to spew:
http://www.automotosports.com/cam_test.asp

Hmm, looks like more duration caused more overlap, thus slowing spool and resulting in 10 less wtq for the 264/264 vs the 272/272 comparison.

WTF are you talking about gearing being a torque multiplier? What is wrong with extra duration on the exhaust side, if you were unable to read my first explanation, is that on a stock turbo setup the exhaust backpressure is greater than the boost pressure and thus flow is reversed during the overlap period. Since you don't know what that is either, reverse flow means exhaust gets pushed back into the combustion chamber which is what causes worse off boost characteristics, slower spool and less torque.

So if it is such a silly idea to have an intake bias, why did Mitsubishi do it in the first place?

Oh, and actually its an LS6 that I built last summer in my spare time. Not bad for a motor that makes 527 rwhp on pump gas with the stock intake, throttle body, ignition system, fuel rail and lines, crank and block and still gets 27 mpg...