Just curious if its been done before... They have a nicer power band without the cost of the RA/380 cams.

6G72 #3 - 4500rpm-5500rpm
6G74 #4 - 4000rpm-5000rpm
6G74 #6 - 4500rpm-5250rpm
6G74 #7 - 4000rpm-5500rpm (Also #15)

Try it.
Post results.
coolface.jpg

I know its been done in 3G Eclipses, but I havn't been able to confirm their 6G72 runs a #3 cam. Their results were: 166fwkw (3.5 with 3.0 eclipse cams, extractors, CAI, full exhaust, tune).

What's wrong with Ralliart cams? My one pulls hard from 3000-5500. Dies in the ass after 6krpm, so i want to try and fix that, but otherwise they're great.

And yeah, try it and see what happens - should be interesting and you can report back if they're any good.

Cost and availability is the issue. My 272s are costing less then the last set of RA cams that I seen FS.

From what I've been told the #3's are very similar to # 6's. The reason the 6's run out earlier in the rev range on the 3.5 is because of the extra capacity and lower comp and the same heads as the 3.0. ie same breathing capability for both.

Cheers Dave.

Might have to line them up when I get a set of #6's out. Caz_375 has a #3 laying in a bucket in his garidge and there are some #4's waiting to be sent off to Camtech this week :)

The #4's are the softest cam out of the 4 why would you send them to Camtech?

Don't have any 6s laying around and need to check if its possible to regrind to HKS 272 profile.

Be careful, from what I see these are grinds taken from evo camshafts. The problem is the evo has a 1.7 rocker and the 6G series has a 1.3 rocker so you get the duration with out the lift, which is no good. A #6 doesn't leave them anything to work with, not unless the build it up.
What other things are planned in the build? Would 7/15's do or are you looking for a bit more?

Cheers Dave

Will see what they say. For now it'll be just camshafts (which may be used in a 3.8 later). Not interested in 7/15s as I like to be able to rev past 5500rpm. I'll be kicking the limiter up to 7100rpm (spoken to a few who say this is a nice safe limit), replacing whole exhaust (headers, cat, catback, rear muff), cams, and tuning.

If needed I will do 272 billets instead (Havn't been game to ask them a price yet :P)

What's wrong with Ralliart cams? My one pulls hard from 3000-5500. Dies in the ass after 6krpm, so i want to try and fix that, but otherwise they're great.

And yeah, try it and see what happens - should be interesting and you can report back if they're any good.
why would you possibly need to rev higher than 6000RPM? redline begins then and the rev limiter is at about 6,700RPM or there abouts.. and peak power is at 5,500RPM and torque is at 4000RPM..... i see no point in revving past redline anyways- any higher and the motor would most probably go "BANG"

No, peak torque is 4500rpm, peak power at 5250rpm, rev limit is 6793rpm. The engine is more then capable of revving to 7000rpm and many people already have a limiter of 7100rpm. The engine is designed to go much higher, however the heads are a bit restrictive. To give you an example of strength of 6G7 blocks, cranks, rods - the 6G72MIVEC's stock rev limiter is 8400rpm.

Edit: I see you were addressing MattVRX - Yes, 4000-5500 is the RA cam powerband, the rest of above still applies though. Sometimes it is beneficial to go above 6000rpm however. Example of this is a on the drag strip on the 1-2 shift. Shift at 5500 and you'll fit 4000rpm and wheelspin. Shift at 6000 and you'll hit higher in the range and grip.

I think you should send some #7's so they can see the extra lift they need to look for and put extra duration that you need for the revs you want. They will work better in the 6G75 than the 74.

The 6G series can withstand some pretty high revs, they are a very strong bottom end.


Cheers Dave

I guess a revvy engine is cool but i seem to find it fun to be able to keep in lower revs and still enjoy the power. Dean with an lsd you will hopefully be getting shifting at 5500 into 2nd won't make you wheelspin if you have Ku31s, you said you may even get ku36 for the front. In the RA shifting at 5500 doesn't wheelspin at all so even with just say 20kwatw more i don't think it would be a big problem. And if it was it would be an easy fix by using less throttle.

To give you an example of strength of 6G7 blocks, cranks, rods - the 6G72MIVEC's stock rev limiter is 8400rpm.

Umm... where's our resident 30M owner when you need him? I think the 30M's stock limit is actually 7400rpm though.

Umm... where's our resident 30M owner when you need him? I think the 30M's stock limit is actually 7400rpm though.

nah that's redline wytwun

I guess a revvy engine is cool but i seem to find it fun to be able to keep in lower revs and still enjoy the power. Dean with an lsd you will hopefully be getting shifting at 5500 into 2nd won't make you wheelspin if you have Ku31s, you said you may even get ku36 for the front. In the RA shifting at 5500 doesn't wheelspin at all so even with just say 20kwatw more i don't think it would be a big problem. And if it was it would be an easy fix by using less throttle.

Hayden a 5500 1-2 shift is fairly low, even on an extremely grippy drag strip a 1-2 shift at 6000rpm will chirp. Basically, if you are shifting that high for 1-2 and not chirping, you are shifting too slow.

Oh and sorry Andy, was off by 200rpm for the 30M - Power: 199kW @ 7000rpm (redline 7500rpm) Mivec crossover point @ 5200rpm, rev limit 8200rpm