Who to port Msd intake?
Typically a 10-20 hp change could net you over a tenth depending on how fast your car is already and assuming they are similar days with a decent pass.
Now for me I've made quite a few changes since the first time i went 11.1@124.x with a ls6 intake to basically only net me a .2 gain in the end. But the car has picked up a solid 5-6mph in trap speed with only a 18hp at peak gain. Under the curve is where it's at. It's probably picked up over 30wtq in places. The 124 was on a 10bolt to now i have a 9". Best mph was on a 10bolt @ 131.3. Best on the 9" is 130.6. So sometimes there is some give and take......but I'm not fixing a broke 10bolt.
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For what it's worth the cathedral MSD is the most challenging composite intake to port properly and I remove about 30% more plastic than you will see documented in this thread I included in a link below. Without the removal of significant amounts of material in the tighter cross sectional areas of this intake it's really a very poor design out of the box....in fact it takes me more time to port a cathedral MSD than any other composite intake manifold I have ever worked on, but handled properly yields good results in the upper RPM region of your engine's power curve. Most shops havent done alot of these I assure you and you really have to know what your doing (aka be more of an expert in the art of airflow and design cylinder heads and manifolds for a living) if you're going to get the most out of that particular manifold.
This is a good read for anyone considering port work on an MSD (or a FAST for that matter)
While it hits mainly on my work revolving around the MSD LS7 unit, the points made in the information below are all still applicable to other manifolds as well
A "ported intake" all sounds the same on paper no matter who puts a grinder to it but in the real world the difference in performance can and will be quite dramatic considering the varying level of background and experience the guy wielding the grinder brings to the table.
You get what you pay for in life.....the guys that make the most power on this board (and others) have already figured that out.
https://www.corvetteforum.com/forums...t-mamo-vs.html
Cheers,
Tony
This is a good read for anyone considering port work on an MSD (or a FAST for that matter)
While it hits mainly on my work revolving around the MSD LS7 unit, the points made in the information below are all still applicable to other manifolds as well
A "ported intake" all sounds the same on paper no matter who puts a grinder to it but in the real world the difference in performance can and will be quite dramatic considering the varying level of background and experience the guy wielding the grinder brings to the table.
You get what you pay for in life.....the guys that make the most power on this board (and others) have already figured that out.
https://www.corvetteforum.com/forums...t-mamo-vs.html
Cheers,
Tony
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Tony@MamoMotorsports.com
Anything worth doing is worth doing well. Build it right the first time....its alot cheaper than building it twice!!
www.mamomotorsports.com
Tony@MamoMotorsports.com
Anything worth doing is worth doing well. Build it right the first time....its alot cheaper than building it twice!!
Last edited by Tony @ Mamo Motorsports; Dec 7, 2017 at 10:17 PM.
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From: hattiesburg, Ms
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From: hattiesburg, Ms
If the stock cam looks good when I pull it then I’m gonna do a cam only setup but if it looks beat up then I’ll need some lifters so I’ll go ahead and throw the trick flow heads on. No reason to put the stickers back on. I’m still trying to go faster than that 11.24 that I ran before I go from just bolt ons. I wanna stay in rumble so I’ll have to run 11.00 and slower. Heads/cam maybe too much to slow down for that. I gotta tear it down soon if I’m gonna do it cause April may be the first race in the series this year.
If the stock cam looks good when I pull it then I’m gonna do a cam only setup but if it looks beat up then I’ll need some lifters so I’ll go ahead and throw the trick flow heads on. No reason to put the stickers back on. I’m still trying to go faster than that 11.24 that I ran before I go from just bolt ons. I wanna stay in rumble so I’ll have to run 11.00 and slower. Heads/cam maybe too much to slow down for that. I gotta tear it down soon if I’m gonna do it cause April may be the first race in the series this year.
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I have a vrx-5 and and full exhaust. Cnc ported heads and soon a ported fast 92 intake. Few stuff to finish off. I'm hoping I'll break 450whp