[PRAY]

Originally Posted by 1slowssm6

Pray,I see that your going with a Ported msd? On the fb camaro pages whenever it's brought up they say don't go msd with boost? Curious about your thoughts on that,I'm
Going longtubes,e85,intake soon,but wanna boost next year(procharger) do you think the msd is best vs stock,stock ported,Holley high rise on boost? I only wanna spend money on an intake once. Thanks for any insight

I have heard the same thing about the MSD. But you know me, test, test, and test some more. I will either verify the theory or debunk it.

My reasons for going with it right now is the availability of space in the manifold and runner length to promote high rpm power. If I was staying with the stock cam then I would have stayed with the stock ported IM. I may end up with the stock IM in the end. My converter is also a big determining factor. It basically flashes to 4K off the line so it covers almost all of the MSD's deficiencies and if I pulley the blower properly I should be able to generate 6-8lbs of boost off the line. There should be no noticeable losses in tq from the cam, MSD, blower with my set up.

James Goertz had a great post on plenum volume and it's relationship to runner length. He said that you need plenum volume in a central area to slow down and distribute forced air to the runners. This allows the air at speed to fill a central holding area and then turn the corners getting into the runners and then into the heads. This theory makes since to me on a couple of points. One being slowing down the air so you get even distribution to all the runners vs. the air being forced to the back of the manifold and over feeding the rear runners. The other is the speed in which the air passes over the short turn in the head runner and hits the valve face.

One thing that is very hard to duplicate with head porting is boost. If you have a really awesome flow bench you can crank it up to 44" and see what your runner looks like at that depressions. With the size of todays heads and valves and their ported capabilities, getting over 28" of depression gets a bit difficult on a lot of benches at max valve lift. Since velocity is being created now and we are not relying on vacuum any more the intake runner needs to be re-evaluated. A cross section increase may be necessary now to slow the air down and utilize the entire valve diameter. But there is a balance between all out power and drivability in a daily driven centri car. We have to remember that with a centri car you are driving a N/A car till you hit boost. I have been very disappointed with many centi cars that were built to rely on boost. They drive like stock or worse which is no fun at all.

The other issue I can see with the MSD is separation at higher boost levels. MSD did not do a good job of securing the rear side sections of the manifold in my opinion. One more bolt on each side would have been nice. In a N/A set up it is no issue. Vacuum will seal the manifold at WOT. But under pressure I can see it not holding together. If it doesn't work out then I will sell it since once it is ported it is a proven performer with the right set up in an N/A car.

What I don't know right now is will a cam and boost give me the shift extension I have been looking for on the stock ported IM. So far, no matter what I do to this thing with the stock cam it peaks at 5,700. I will say that we just did a custom 3" with cut outs on my car and it cut my dyn/cyl loss up top in half. I would have to get on the dyno in its current configuration to see if it helped my hp loss up top. The data is telling me it did.

Should be interesting.

[1slowssm6]

Awesome thanks for the insight,I plan to follow this closely,I plan on going with the p1 and stage 2 setup myself,so if ported msd seems to work well on your setup I'll stick with it,kinda hate the fact it's our only option that doesn't require a large hood and cutting the cowl(Holley high rise),one difference we have is me being an m6 car,I'll be clutch dumping around 5k,hopefully gforce components will hold up,I'll also still be on a stock cam do you think that will kill the msd for me?

[PRAY]

Originally Posted by 1slowssm6

Awesome thanks for the insight,I plan to follow this closely,I plan on going with the p1 and stage 2 setup myself,so if ported msd seems to work well on your setup I'll stick with it,kinda hate the fact it's our only option that doesn't require a large hood and cutting the cowl(Holley high rise),one difference we have is me being an m6 car,I'll be clutch dumping around 5k,hopefully gforce components will hold up.

The one thing you have to consider with the M6 is gear availability and gear splits. With only having 4 forward gears you have a much wider shift recover split to recover from. Tq is your friend in this case. You have to look at it in two schools of though. You can either run it out as high as you can rpm wise to help shift recovery or keep the rpm's in check and build as much tq as possible. I think pulley down and boost restrict could be the best bet here if you are staying with the stock cam.

I also think that Goertz's G1Pro fits under the stock hood. That could be something to look at as well.

[DiGiam]

A little off topic but I sold my LT4 set up after hearing multiple people pushing oil out of the main seals. Id like to see what kind of crank case ventilation solution you come up with

[PRAY]

Originally Posted by DiGiam

A little off topic but I sold my LT4 set up after hearing multiple people pushing oil out of the main seals. Id like to see what kind of crank case ventilation solution you come up with

I think right now Elite Engineering is the only one selling a valve cover breather. The issue I am concerned about is it not having enough clearance with how the Procharger filter is placed.

I have seen where there is a vendor offering their breather catch can combo for this platform now. I used one in the past. I won't comment on it's merits or lack there of.

For now I will just run my current catch can and see what happened.

[Perdieu]

Originally Posted by DiGiam

A little off topic but I sold my LT4 set up after hearing multiple people pushing oil out of the main seals. Id like to see what kind of crank case ventilation solution you come up with

a lot of the boosted set up's are having this issue.

Originally Posted by PRAY

I think right now Elite Engineering is the only one selling a valve cover breather. The issue I am concerned about is it not having enough clearance with how the Procharger filter is placed.

I have seen where there is a vendor offering their breather catch can combo for this platform now. I used one in the past. I won't comment on it's merits or lack there of.

For now I will just run my current catch can and see what happened.

Please PM me the vendor for this can..

Right now my PCV combo is the stock setup and two -12 fitting on the valve covers with lines to a custom catch can with a breather

[LibertyHill]

The Mighty Mouse can addresses this issue.

[MR 45TH]

Originally Posted by LibertyHill

The Mighty Mouse can addresses this issue.

That's what I am using.

[PRAY]

For those running the MM, I hope it works out for you guys.

[Perdieu]

Originally Posted by PRAY

For those running the MM, I hope it works out for you guys.

What he said.

I'll add PLEASE keep tabs on your set up.. if you don't see oil in the can ask yourself "why" and "where did it go"

[MR 45TH]

Originally Posted by PRAY

For those running the MM, I hope it works out for you guys.

Originally Posted by Perdieu

What he said.

I'll add PLEASE keep tabs on your set up.. if you don't see oil in the can ask yourself "why" and "where did it go"

So what am I missing here .

[aka Reckless]

Originally Posted by PRAY

Okay. Are you just running a catch can now or are you running an actual valve cover breather? I figured the CCV system would be enough to mitigate crank pressure in conjunction with the PCV system but I guess not. Thanks for the heads up.

Using a Moroso catch can with -10an fittings on each side and has the breather on top. I have aftermarket valve covers, so a -10 fitting in each cover running to the can. Original PCV system is no longer used.

Part number 85468

[Perdieu]

Originally Posted by aka Reckless

I have aftermarket valve covers,

what covers are you running ? coil relocate ???

[PRAY]

Just ensure that any breather you use has a check ball in it or you will be introducing un-metered fresh air into your system. This isn't 1968 anymore. Everything has to be accounted for. It can cause major idle issues if the motor is allowed to pull air behind the MAF sensor.