Oh no, another cam recommendation thread!: street-driven mild 3.6 EFI/ITB

[safe]

Originally Posted by msmall215

Magnus, what cams are you using?

From FVD.de, "sport" cam, they only have (or had) 2 grinds other than stock. You set it to 2.1mm. On my engine it makes top power under 6000 rpm and falls off at 6400, I think my exhaust is a bit restricting because it should make power higher up in the range. On a buddys engine they pull above 7000 and make 10hp more.

[Mixed76]

The torque number is reasonable for flywheel, a bit high for rear wheel. Maybe that dyno is already corrected for drivetrain loss.

Sent from my Nokia 7.1 using Tapatalk

[msmall215]

Thanks all for your insightful input. A quick update, my cylinders are with EBS for replating and honing. I've also decided to opt for a set of new CP pistons in 11:5:1 CR which will open up cam choice a bit. My goal is still to keep this motor rather mild to help elongate the life span of my 915 so cams will land somewhere in the DC24 range.

[trond]

11.5 ? thats a lot is it not ? How will you avoid detonation ?

[msmall215]

Originally Posted by trond

11.5 ? thats a lot is it not ? How will you avoid detonation ?

It's a 964 motor, will be running twin plug. Factory is 11:3:1 I believe.

[winders]

Originally Posted by msmall215

Factory is 11:3:1 I believe.

Not really. It is more like 10.8:1 at most.....

[msmall215]

Originally Posted by winders

Not really. It is more like 10.8:1 at most.....

Fair enough, I was just going by published factory specs.

[winders]

Maybe you missed the point. The point is that your 11.5:1 engine has a lot more compression than a standard 3.6 as delivered. So, if you are running pump gas, it would be good if your EFI system has knock sensors and can retard the timing.

[msmall215]

Originally Posted by winders

Maybe you missed the point. The point is that your 11.5:1 engine has a lot more compression than a standard 3.6 as delivered. So, if you are running pump gas, it would be good if your EFI system has knock sensors and can retard the timing.

Ah gotcha. Yes plan is to run knock sensors to adjust on the fly. Will also be running 93 as available here in PA, and have a backup map for 91.

[winders]

My race engine with about the same compression ratio and probably 25 degrees of advance needs 100 octane race gas to be safe. So be careful!

[yahh]

I'm building this exact same setup and I'm hoping for 270 WHP. That would be a nice 90hp jump over my RoW 3.0 that dyno'd at 180 whp. I was recommended and went with 95 3.6 with Rasant ITB's/ GT3 Plenum DC 21 cams and AEM Stand Alone.

[msmall215]

Originally Posted by yahh

I'm building this exact same setup and I'm hoping for 270 WHP. That would be a nice 90hp jump over my RoW 3.0 that dyno'd at 180 whp. I was recommended and went with 95 3.6 with Rasant ITB's/ GT3 Plenum DC 21 cams and AEM Stand Alone.

Solid package, Andrew does nice stuff. I have his AEM/harness setup in my ROW 3.0 right now with Triumph ITBs from Al Kosmal. I will also be going with the DC21.