It completely depends on what ur preference is. If ur looking for stock like idle, go for the 264/264 or the 264/272 combo. If u want more topend, go for 272/272.....i've also heard good things about the 272/264 combo.....just search through this thread and find out what suits u best.

 

yep...

 

Look back through this thread i posted an untuned one. Should have a couple of great ones after this weekend. Injen and Cody are dynoing


Best Results we have seen on Mid range and top end torque is from the 272/264

greg

 

This is pure pump gas at 21 psi. Keep in mind that this in not tuned for the 272/264 yet.... I am running 13.6 avg AF ratio through 4K!!! Too lean!!! Then it goes rich in the top end to about 10.3 at 7200 RPM. One thing to note is the nice lack of drop off all the way to 7500. :-) The HKS cams fell off after 6500 but they were straight 264s.

 

Were you using the stock cam gears?

 

cant wait to see the tuned results and see what it turns out, sill like my combo looks to spool quicker.

What are the benefits you see with the 272in/264ex compared to the 264in/272ex greg? From the resarch i've done the evo is lacking on the Exhaust side of air flow, and the intake is more then adequit. I dont understand the concept of the larger intake when its going to have a funnel effect.

maybe i'm missing something... i dunno

 

PLEASE, post the graphs after the dyno session. I can't make up my mind between the 272/264 and 264/272 combos. I want down-low power, too, but Evo11v's dyno sheet looks too tempting.

 

yeah the 264's give more power down low also, like i said in post 156 I just dont grasp the concept of the bigger intake cam when the exhaust is where the airflow is restricted more on our cars.

Still waiting on an answer on that one... I'm very happy if anyone would like a ride and wants to meet me I would be happy to take them for a spin, but i have a busy schedule; weekends are best.

It actually feels more and more like a muscle car lol, less of that dead down low feel. Notice it today actually since I was crusing around and wasnt stomping on it. Feels good, i'm likeing it more and more.

 

The reason I suggest the 272/264 setup is do to the restrictions of the Stock turbo exhaust A/R. The funnel effect works well with aftermarket manifolds and larger turbo’s which do not have boost problems. The buildup of pressure between the exhaust ports on the head and the turbo will only allow for so much pressure before the wastegate is forced open by exhaust pressure. To much pressure pre-turbo will cause bleed off and thus causing the boost to fall which inturn will cause the torque to fall off at higher RPMS. This is the same reason so many people run the 10.5a/r to help flow more air out of the turbo and help to lower the pressure pre turbo which will keep a much more stable boost pressure and makes more top end power while not decreasing spool time.


Hope this helps a little as far as an explanation. Its kind of hard to put this down in writing i will be more than happy to talk to anyone over the phone about this.

 

Kinda get it, cant wait to see the tuned numbers. thanks greg!

 

Good stuff.

Does this sound right for the different combos with stock turbo? I haven't seen a post with the 4 combos compared and contrasted directly in terms of idle, emissions, spool, mid, and top-end power.

264/264
Best idle without cam gears. Best chance of passing emissions without cam gears. Good spool, slightly more drop off in tq in higher rpm compared to other combos.

272/272
Worst idle without cam gears. Passing emissions?
Slightly slower spool. Holds TQ in higher rpm a little better.

264/272
Better idle than 272, but not as good as straight 264s. Passing emissions, I hope so! Best spool due to overlap with good mid and top-end. Better than better mid/top than 264s?

272/264
Idle would probably not be as good as 264 intake cam. Passing emissions? Slightly slower spool than 264/272, but better mid and top-end.

More input and/or corrections are appreciated! Also, the stock config actually has more duration on the intake side.

Thanks,

FB

 

The spool will be the same on the 264/272(w/ cam gears), 272/264(without)

The 272/ 264 exhaust will spools just a little bit slower than the 264 straight. The 264/272 is about the same as the 272/264 maybe a 100 or 200 rpms sooner. deffinatly not worth what you make up on the top end with the 272/264

Greg

 

A smooth idle is important to me, I've heard what 272/272 w/o cam gears sound like through a recording and it's not what I want. Does the 272/264 w/o gears sound like straight 272/272? or does it sound more like 264/264, or perhaps, more likely somewhere in the middle. I'd love to hear what 272/264 sounds like w/o gears if anyone has or can create a recording. Thanks.

 

264/272's have a very close to stock idle, again there is a video posted on here what it sounds like if you are woundering what they sound like

 

I'm interested in this, too.