I posted this in the GSC cam thread as well, but I figured more people would see it here.

My brother has been searching for cams for his 1G DSM and he stumbled upon Brian Crower's new company (Crower's son), and he is developing cams for VIII and IX. Most interesting find was that the IX intake cam is actually more aggressive than the VIIIs. We already knew they were "different" in terms of being non-interchangeable however, I dont think many people knew it was actually more aggressive. News to me!

Here are the specs of both VIII and IX. Note: The IX and VIII exhaust cams are exactly the same.

VIII
Duration---- Duration@ .050 ------Lift (in)------ Lift (mm)
248°/248° -----200°/200° -------.386"/.367"-- --9.80/9.32

IX

256°/248° ----206°/200° ----.396"/.367"---- 10.05/9.32


As you can see the IX intake cam has MORE LIFT AND MORE DURATION! Just one more reason why IX's are making extra power!

 

It is nice that someone put up the specs! Thanks!

I have a noob question and hope I can get a quick answer. I have a HKS 272 exhaust cam with 20,000 miles on it that I pulled form my VIII. Should I put it in my IX and how much power with a tune could I expect? I thought I read that it would not make much power, I could be wrong.

Also is the exhaust cam the one with the cam angle sensor attached?

Thanks!

** You should update the stickey! PM the mod

 

good info

 

Thanks for the specs

 

the sticky on this forum has different info for both duration and lift:

Factory EVO
Advertised Duration - 260 deg Int / 256 deg Exh
Effective Duration - ___ deg @ 1mm Int / ___ deg @1mm Exh
Lift - 10.0mm Int / 9.5mm Exh
Lobe Centerlines - 109 deg Int /111 deg Exh
LSA - 110 deg
Stock valve springs OK

JDM EVO MR
Advertised Duration - 260 deg Int / 256 deg Exh
Effective Duration - ___ deg @ 1mm Int / ___ deg @1mm Exh
Lift - 10.0mm Int / 9.5mm Exh
Lobe Centerlines - 113 deg Int /112 deg Exh
LSA - 112.5 deg
Stock valve springs OK

 

I don't think you can use the same 272 cam from an 8 and put it in the 9. I think the 9 has it's on cam design an lift. I heard TTracing used 280s ex. for their nine testing and got some pretty good numbers.

 

soontoBEVO "The IX and VIII exhaust cams are exactly the same. "

That is why I asked, I think the intake cam is the different one.

 

Interesting

 

Yes the specs on the exhausts cams for VIII and IX are identical.

 

BTW, I think a lot of people have speculated where the extra power of the IX really comes from.

Ive seen some VERY impressive numbers for the IX dyno wise and track times, but Ive also seen a handful that were mediocre and VERY far from others.

Nonetheless, the added power from the IX comes from the larger compressor housing, the addition of MIVEC, a more aggressive intake cam and also revised coolant passages in the cylinder head. Who knows what other little things Mitsubishi did to improve upon the EVO... the thing is, Mitsubishi does not disclose everything. Did they ever mention revised intake cam or coolant passages? No, they said "larger turbo outlet" and the MIVEC, so immediately everyone attribute the 15-25HP extra over the 2005 VIIIs to both of those modifications. I think its a little bit of everything.

Im unsure how much power you will actually gain from upgrading to a 272 exhaust cam on an IX with the stock turbo. Probably something, but nothing crazy. Gains with a larger turbo would be much better.

 

I dont know if those specs are correct or the ones I have. I got mine from Crower.

 

+1.. I agree that alot of the power on the IXs come from the turbo itself... Ive seen a IX turbo out of the car, and i must say, it is alot larger than the 05.. Ive seen a couple of 05 put a IX turbo on the forums on 91 oct, and have gotten some good gains, even better on 93 oct! IMO, if i had a IX, i would leave the intake cam stock and just do an exhaust cam.. Seems that alot of IXs using stock cams have made some good numbers than with the ones with both cams

 

keep us updated.

 

I have just seen a JDM Evo 9 here that blew its stock turbo and swapped to a stock TME turbo with the smaller 15GK compressor wheel and laid down 361 WHP at 22 psi of boost. That was on stock cams , stock intercooler, full exhaust and an intake system. I don't really think its that much on the turbo itself. More like the cams or the MIVEC system itself.

 

Yeah all the cams that have came out so far have proven to be completely questionable. If I had an IX right now, I know for sure I'd still be waiting patiently for a PROVEN pair to emerge. GSC and TTR have not come through.