ok guys, i have been doing some research and it looks like the OTTP stage 2 blower cams are the route i am going to go.

Has anyone tried these out yet ?

Dyno sheets ... really looking for any and all feedback.


Im currently on a 2.8 m62, E85, ported head, fully bolted setup.

I think these cams will keep the power where i want it on the m62 and TVS.

 

go with the stage 4s

 

i want to keep my low end and mid range power ... i do autox and road course ... i think the stage 4 will be a dog until really late.

 

not on the TVS

 

if you have some sheets post them up.


what do you think about this :

"For a nice powerband street setup and make good mid range and spin to 8k go with ottp stage 2.

If your are looking for more power at the loss of some mid range and are going to spin 8k+ go zzp stage 3.

Ottp stage 3 will give up a bit down low compared to zzp stage 3 but should be able to pull to 9k rpm and make a bit more peak number than zzp stage 3.

If your looking for an all out peak number at the expense of low and midrange than you should get ottp stage 4, that should be good for 10k rpm but under 7k you'll lose power"

I do not plan to do the NBS.

 

subd

 

Mr B has cams similar to ottp stage 4 and on his TVS. Dyno doesn't look like he lost much on the lower end.

 

What is he revving out to ? Did he do anything in the balance shaft dept.?

 

He runs the chain. Idk if he deleted em or has neutrals or stock. . & I know he wasn't taking it past 8

 

Wouldnt stage 4 @8k be a waist ? I mean they look like they would shine from 7-10k.

Thats why i figured stage 2 would still keep that nice solid curve and still gain some up top because i dont plan to run her past 8k

 

He revved it to 8k. Power didn't drop off. He's a built motor but I'm it sure what he did with the bs.

If your gonna pick the small cams and drop them in, don't expect a huge gain. You'll probably get 15-20hp for your efforts.

In my opinion if your gonna do all that work, better make it worth it. I'll be running custom cams.

 

zzp is full of it about their cams and where they make power. you cant just look at didgets and say this cam will make power to here with out the rest of the picture

I am running the bs delete also and spinning to 8k I would run a smaller cam on a m62 and even some tvs setups and you will also need to consider a bigger throttle plate and intake at some point as the stock plate will become a restriction along with the intake

 

Thanks for the great info Mr.B.

What was your setup on the before pull (red line) ?

I am not too keen on the zzp cams which is why i am going with Josh's cams.

The stage 4 cam is very similar to Mr.B's custom grind, and they both are great cams. I am jus worried about the low end loss on an m62.

I would go stage 4 all day if i was on a TVS Ballz to the wall setup. Which im sure Mr.B is on track for.

I feel that the stage 4 on an m62/minor TVS build would be overkill.

Has anyone put the stage 4 on a m62 yet ?

I dont plan to do anything on the BS so i believe im limited to 7500/7800 rpms so i want to get the broadest most usable power-band out of the car.

Josh(OTTP) told me to drop to a 2.6 m62/E85/Ported head setup on the stage 4 cams ... not too sure how i feel spinning the blower that fast out to 7800 rpms.

 

Redline is off the bottle in Mr B's dyno there.

My 2 cents, there reason why I ran a 2.5 on the m62 was for thr torque and to shift the power band sooner in the rpm. Revving it to 75k all the time. Yeah was wasy over spinning the blower but I figured they blower is tough and could take it and if I ruined one they are cheap to buy again. At most would need a rebuild on the bearings.

That's not for everyone and most should stray on the cautious side to be safe. Trying to be efficient is the key goal. So that means is a give and take relationship. On stock head and cams the m62 stops making power at 7k. With ported head and depending on cams you can make power higher but then you have to pulley up to keep the blower from over spinning but then you loose the ability to get mire torque unless you get the cams to do so for you.

Its all about making the parts work together and being selective and being honest as to what your going to really use the car for. Small pulley and smaller cams to keep power down low and don't over rev and be a great street cat stop light to stop light. Or bigger pulley and bigger cams and rev it high for a top end car.

 

You lose quite a bit of low end on an m72 with the s4's

 

you would be good on the #3 set of cams I don't know where they will fall off at I don't like the stage mentality a cam choice should be made from operating range not what stage it is its ******* gay

 

this is what i thought .... you have them on an m62 ?

i want to keep my low/mid range but still gain a little up top, which is why i like the ottp stage 2 cam specs.


As far as mr.b's graph, if the blue line is on the bottle, is there a graph that shows before/after just the cams ... without the n2o .. that is skewing the results a little

 

i think they give them stages to help "name" them. it seems like the higher "stage" you go the more aggressive your build is.

So you say #3, you think that these will keep the low end on the m62 ?

How are your thoughts on a 2.6 m62 blower pulley spun to 7500 ? of course it will get spun that far maybe 2 times a week if that.
- from my understanding the higher LSA on the S3 will broaden the powerband, the smaller pulley will have the trq. hit sooner .. is this correct ?

 

they don't need to name them show the operating range so people can make better decisions on choosing a camshaft

I think the 3 will give you a better balance over the 4 I don't know if the 2 cam will be enough the wider lsa will build more cylinder pressure and help with overall torque and hp with the cylinder pressure increase you can do more with a same sized pulley

 

This.

 

thanks a lot, it is really appreciated, maybe i should have just PM'ed you from the start

but at least this stuff is out in the open now for others to read.


i agree 100% on the naming crap, if they gave an operating range that would help us all out a hell of a lot more. I just dont think they really know thats the problem.

 

Agreed.

In terms of my s1 cams, zpp was spot on with the operating range (I also contacted comp about them before I made the purchase), but it seems they grossly overrated the power range of the s2 and s3 cams.

 

comp can get it dam close on the cam operating range they estimated mine within 500rpm call comp give them the specs you will also benefit from checking the cam centerline and insuring that its where its supposed to be

I always put it out there

 

interesting ... do i just tell comp the cam specs and the engine ? and then just ask the operating range ?


Josh said he checks the base circle before they ship out to customers.

 

pretty much