Ams Evo Cam Test

[crcain]

Originally Posted by Martin@AMS

Are you yelling at me?

Yes I'm sorry I lost my temper I asked 3 or 4 times same question.

Originally Posted by Martin@AMS

My settings on the BC STG 3's was 4 degrees retarded on the exhaust and 2 degrees advanced on the intake to be at 0/0. All other cams I tested where withing 1 degree.

Your talking cam degrees not crank degrees right?[/quote]

Originally Posted by Martin@AMS

You should make fixtures and a custom tip to hold a dial indicator on the retainer, get a degree wheel on the crank, figure out cam specs, find CL and adjust the cams. Not to mention the cams specs on the BC cams card are not correct, so if you go off that you'll be off anyways. You have to find the valve events on your own, figure out CL and then interpret where they wanted it. I have hours and hours into this and to be honest, since your setup can be different than mine (different deck height, head thickness, cam gears, ect), you really should degree it on your car. If the cams I measured were that far off, who knows if other batches are the different.

I know setups are different, I asked the question to get an idea of quality control on the cams being produced.

Did you use a solid lifter when degreeing them?

Any pics of the custom tip? We found the top seemed to sit on the retainer ok but I can see how a custom tip would help a lot. Here was pics from when we did my friends revolvers and other friends 272's.

[Nez136]

So far for street use, im liking my HKS cams, The BC cams seem to not loose low end at all while having good potential, get those things set right Martin!

[jmartinez1170]

So how long is this going to take to find out all dyno numbers and test. If you have all the data which im sure you do please post it. If you want to keep the thread alive just make it a sticky.

[itzwolf]

Martin,

The Tomei 280 graph that is posted is that hydraulic or solid lifter version? I am going to guess hydraulic.

Also on the solid lifter, are you planning/did you use solid lifters, or still using the hydraulic? Information says the solid lifter isnt a 100% requirement but you may not reach full potential of the cams. Is this true? I have heard that solid lifters really are not needed, and a hype thing. I haven't been able to find much available information on solid lifters, and what I have appears the people have gone back to a hydraulic lifter. One tuner locally did solid lifters on an Evo build here with JUN everything, and he claimed it was very difficult, but end result was it was worth it. I'd like to see true data of this, but I just dont see this happening...

I am very curious on these particular cams. I currently have JUN 272's and have been told information from various people that the Tomei's are a better cam for a top end/big build car, for instance mine is everything you offer in a bottom end, your Headgames race head, 37R turbo kit, VSR manifold, ported throttle body etc... etc... I obviously see this with the graph that is posted, but how much better would you say they are over JUN's? I know JUN 272's don't have the amount of lift the Tomei 280's have but have been a pretty good performing cam as several dyno plots have shown. Someone mentioned on here that you guys turned him away from JUN for the Tomei's for instance.

I really wish JUN 272's were included in this testing.

[Martin@AMS]

Yes, you have to use a solid lifter and get the lash correct (.001" of preload)

[turbo271]

Originally Posted by jmartinez1170

So how long is this going to take to find out all dyno numbers and test. If you have all the data which im sure you do please post it. If you want to keep the thread alive just make it a sticky.

Don't worry, this thread is not going to die anytime soon.

Rock on AMS!!

[dsmfan95]

Loving the last test. So it seems that the S2's make about 30whp more than the HKS 272's.

Good news to hear as I should be changing to those this weekend.

[Turbo Kyle]

Waiting for the FP cams....

[jezefink]

has anyone seen numbers on the bigger set of fp cams..the 5's?......
or maybe the 4s?......very interested..

[casper980]

please add the WORKS 269 cams to the list.

[sabastian458]

Originally Posted by Martin@AMS

Are you yelling at me?

My settings on the BC STG 3's was 4 degrees retarded on the exhaust and 2 degrees advanced on the intake to be at 0/0. All other cams I tested where withing 1 degree.

You should make fixtures and a custom tip to hold a dial indicator on the retainer, get a degree wheel on the crank, figure out cam specs, find CL and adjust the cams. Not to mention the cams specs on the BC cams card are not correct, so if you go off that you'll be off anyways. You have to find the valve events on your own, figure out CL and then interpret where they wanted it. I have hours and hours into this and to be honest, since your setup can be different than mine (different deck height, head thickness, cam gears, ect), you really should degree it on your car. If the cams I measured were that far off, who knows if other batches are the different.

Im scared now.


I have very close tolerances in my engine versus others. (decked head .015, and milled block deck .015) If my valves are saying "hi" to the pistons yet, they will be when I start going full RPM band.

[jhanksevo]

i guess im not dissapointed numbers wise for switching my cams

[jbrown]

Originally Posted by casper980

please add the WORKS 269 cams to the list.

The test was done for Turbo magazine and is complete and over with.

If a cam you'd like to see isn't on the list, like JUN or Works, it won't be added. and even if it was, they would have to re-do the base test with stock cams again in order for it to be relevant.

Thanks for the test, AMS, much appreciated, but damn I would have loved to see some JUN cams in there. Some torque curves would be nice though.

[ace_2822]

I think you guys missed a few days of new graphs. Lets play catch up and see the fp cams!! The turbo mag article has lots of detailed info about the test, very good read!

[JC evo1]