CMS 2.5 Blower HP Gains? - Forums at Modded Mustangs
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post #1 of 67 Old August 2nd, 2017, 11:59 AM Thread Starter
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CMS 2.5 Blower HP Gains?

So I currently have a forged shortblock with 16cc pistons and Factory PI heads and cams making roughly 400whp on 12lbs of boost with a vortech V3 blower. Im looking to switch over to the CMS 2.5 blower cams and their stg2 springs. What type of power increases can I expect with these cams. I'll be spinning the rpms higher with these cams so will probably be making more boost too.


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post #2 of 67 Old August 2nd, 2017, 12:31 PM
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So I currently have a forged shortblock with 16cc pistons and Factory PI heads and cams making roughly 400whp on 12lbs of boost with a vortech V3 blower. Im looking to switch over to the CMS 2.5 blower cams and their stg2 springs. What type of power increases can I expect with these cams. I'll be spinning the rpms higher with these cams so will probably be making more boost too.
Id say easily 65+. i went from 425whp at 11psi on a V2 s trim to 482 with a stage 1 cam @12psi,i gained 1lb of boost by getting rid my power pipe.

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post #3 of 67 Old August 2nd, 2017, 12:46 PM Thread Starter
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Id say easily 65+. i went from 425whp at 11psi on a V2 s trim to 482 with a stage 1 cam @12psi,i gained 1lb of boost by getting rid my power pipe.
Nice was that on factory heads? Those are some good numbers. My runs were on a loaded dyno.


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post #4 of 67 Old August 2nd, 2017, 12:48 PM
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Factory heads and I want to say factory pistons are roughly 16cc, this was on a dynojet

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post #5 of 67 Old August 2nd, 2017, 12:53 PM Thread Starter
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Good deal, yeah depending on the year of your car they are either 15.8cc or 18.1cc
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post #6 of 67 Old September 13th, 2017, 04:40 PM Thread Starter
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Cams are here. Time to tear the motor down



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post #7 of 67 Old September 14th, 2017, 11:11 AM
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Gotta get an idle video up too. (after tune of course)
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post #8 of 67 Old September 14th, 2017, 11:31 PM
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Im sure you will be happy They make some good cams.


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post #9 of 67 Old October 3rd, 2017, 11:03 PM
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I love mine they sound great to

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post #10 of 67 Old October 10th, 2017, 10:31 AM
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I love mine they sound great to
do you have a tuned idle video?? can you make one?
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post #11 of 67 Old October 10th, 2017, 11:14 AM Thread Starter
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do you have a tuned idle video?? can you make one?
I second this I would love to hear them. The guy I bought the cams from sent me an idle video on his car.... I like


Also practicing removing the valve springs on a spare motor I have. This tool is really neat. Cams are currently at modular head shop right now getting degreed.



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post #12 of 67 Old October 10th, 2017, 02:02 PM Thread Starter
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I love mine they sound great to
Found your vids on youtube. You made some really good power. What size pulley are you using. I have a 3.15 on my V3 right now, would do about 12lbs of boost @6k rpm looking to spin about 6500 now. What is your fuel setup?


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post #13 of 67 Old October 11th, 2017, 08:06 AM
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where did you get that tool?

Mmr900 4.75 striker. Stock heads, CMS stage 2 turbo cams, on3 67mm ball bwaring billet wheel turbo kit @12.7 psi
539 rwhp / 601 rwtq

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post #14 of 67 Old October 11th, 2017, 10:38 AM Thread Starter
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where did you get that tool?
Ford Valve Spring Compressor 4.6 engine and 5.4 2 valves engines


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post #15 of 67 Old October 11th, 2017, 08:45 PM
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Originally Posted by 98SnakeHorse View Post
Found your vids on youtube. You made some really good power. What size pulley are you using. I have a 3.15 on my V3 right now, would do about 12lbs of boost @6k rpm looking to spin about 6500 now. What is your fuel setup?
Idle sounds better now tuned and warmed up. Im using a 3.12 and 15% overdrive. My belt started slipping not long after the dyno session but lasted awhile lightly slipping before it got to bad. i definately need an 8 rib kit before next season. Fuel is Return with sumped tank, aeromotive a1000 external pump, aeromotive fuel pump control box, deka 60# injectors. Hpx slotsyle maf apparently almost maxed in 3" tube.

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post #16 of 67 Old October 11th, 2017, 08:52 PM Thread Starter
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Idle sounds better now tuned and warmed up. Im using a 3.12 and 15% overdrive. My belt started slipping not long after the dyno session but lasted awhile lightly slipping before it got to bad. i definately need an 8 rib kit before next season. Fuel is Return with sumped tank, aeromotive a1000 external pump, aeromotive fuel pump control box, deka 60# injectors. Hpx slotsyle maf apparently almost maxed in 3" tube.
Wow you got a serious fuel setup. I'm going to a 340lph in tank pump with deka 60lbrs and a vmp5000 maf

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post #17 of 67 Old October 11th, 2017, 09:19 PM
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Yea i dont really know why i went that route probably more trouble and money then it was worth lol. I added another dyno vid i forgot my friend took
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post #18 of 67 Old October 11th, 2017, 09:19 PM
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Wow you got a serious fuel setup. I'm going to a 340lph in tank pump with deka 60lbrs and a vmp5000 maf

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What are your hp goals? I'm running a V2 s trim with a 3.33 stage 1 cams and a single 340lph pump return less with 4#injectors and a JMS feulmax and Ive got plenty of fuel at 480whp @12psi

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post #19 of 67 Old October 11th, 2017, 09:32 PM Thread Starter
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What are your hp goals? I'm running a V2 s trim with a 3.33 stage 1 cams and a single 340lph pump return less with 4#injectors and a JMS feulmax and Ive got plenty of fuel at 480whp @12psi
Well currently I just have a 255lph pump return system, vmp 5000 slot maf and the 60lb dekas. With the new cams and higher rpm I will be around 16lbs of boost. I'm thinking the 255 pump will be out of juice not to mention I have the 98 bastard year fuel system. So I'm switching to the mid 80s to 97 tank and bigger pump. Would like upper 400's low 500's

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post #20 of 67 Old October 12th, 2017, 12:21 PM
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What are your hp goals? I'm running a V2 s trim with a 3.33 stage 1 cams and a single 340lph pump return less with 4#injectors and a JMS feulmax and Ive got plenty of fuel at 480whp @12psi
Interesting.....

What is the JMS fuelmax? is that like a Boost a Pump?

I have a V1 upgraded to Si trim intercooled, 3.125 pulley making 13psi, 340 pump returnless, 42 pound EV1 injectors and VMP slot MAF. I maxed my pump out at 448whp @6300 RPM. Tuner told me he could have carried it out to 6500 with 60lb injectors. I'm going to install my Boost a Pump and 80lb injectors soon but am collecting things for a return system as well.

Its cool how so many of these setups seem so similar but are still so different.
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