cams
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Senior Member
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From: WA
cams
I'm getting FRPP Hot Rod Cams installed today.
I have an open JDM tune and will get it dyno tuned.
Is there anything I should know or tell the shop?
What is the best idle or what not to get the best choppy sound at idle and at low speed?
The shop where I'm doing the install definitely know what they are doing, it is a mustang shop so they know about cams, and for the tuning they won't start from scratch they will use the JDM tune optimized for cams.
The cams and parts included were $800
Install should be under $1200 I hope..
More info this evening or this week-end
http://www.fordracingpartsdirect.com.../m-6550-3v.htm
I have an open JDM tune and will get it dyno tuned.
Is there anything I should know or tell the shop?
What is the best idle or what not to get the best choppy sound at idle and at low speed?
The shop where I'm doing the install definitely know what they are doing, it is a mustang shop so they know about cams, and for the tuning they won't start from scratch they will use the JDM tune optimized for cams.
The cams and parts included were $800
Install should be under $1200 I hope..
More info this evening or this week-end
http://www.fordracingpartsdirect.com.../m-6550-3v.htm
Last edited by widj; May 30, 2014 at 09:56 AM.
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From: WA
I'll check the truck tomorrow morning it is ready now.
so $1000 for install (took 2 mechanics)
they dyno it and they didn't need to make any adjustment to the JDM tune, it was perfect, AFR was perfect as well.
my previous dyno without true duals and without cams on a dynojet was 420/520, this time it is on a mustang dyno and it did 406/489 (me kinda disappointed).
I can't wait to have it tomorrow, I'll make a few videos and post it here.
so $1000 for install (took 2 mechanics)
they dyno it and they didn't need to make any adjustment to the JDM tune, it was perfect, AFR was perfect as well.
my previous dyno without true duals and without cams on a dynojet was 420/520, this time it is on a mustang dyno and it did 406/489 (me kinda disappointed).
I can't wait to have it tomorrow, I'll make a few videos and post it here.
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Joined: Dec 2009
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From: North Carolina
Yes thats's 14.3 psi peak with an avg of 13.4psi. Mustang Dynos are generally 11-12% lower then Dynojets. 12% puts you at 454/547
Defineitly talk to these guys and find out what your Brakes Specific Fuel Consimption was at Wide Open Throttle. And ask what the load on the motor was? Fuel injector duty cycle?
Fuel pump duty cycle?
They should have this readily avaliable for you.
Defineitly talk to these guys and find out what your Brakes Specific Fuel Consimption was at Wide Open Throttle. And ask what the load on the motor was? Fuel injector duty cycle?
Fuel pump duty cycle?
They should have this readily avaliable for you.
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Senior Member
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From: WA
Yes thats's 14.3 psi peak with an avg of 13.4psi. Mustang Dynos are generally 11-12% lower then Dynojets. 12% puts you at 454/547
Defineitly talk to these guys and find out what your Brakes Specific Fuel Consimption was at Wide Open Throttle. And ask what the load on the motor was? Fuel injector duty cycle?
Fuel pump duty cycle?
They should have this readily avaliable for you.
Defineitly talk to these guys and find out what your Brakes Specific Fuel Consimption was at Wide Open Throttle. And ask what the load on the motor was? Fuel injector duty cycle?
Fuel pump duty cycle?
They should have this readily avaliable for you.
if what you are saying is right then 454/547 is exactly +30HP gain as stated in the specs of those cams, they didn't lie then!
but it seems like the true duals didn't bring any improvement
ok I'll send them an email now about your request, thanks!
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Joined: Dec 2009
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From: North Carolina
The questions I ask you in my previous post will answer the question of whether or not you need to step down boost or not.
As for your hp. Did you dyno after the exhaust mod? If not then you are giving the cams all the credit for the power. How do you know the exhaust didn't give you 15 and the cams 15?
Either way the exhaust is whats allowing you to make that power. The cams can't give you 30rwhp if your system is not optimized. Plus if you didn't have the exhaust done your exhaust gas temps would be higher which could cause detonation thus blowing the motor, melt a valve or at the very least would cause your timing to be reduced thus cutting hp. Not to mention the hp lost as the engine would now have to work to push the air through the exhaust system.
As for your hp. Did you dyno after the exhaust mod? If not then you are giving the cams all the credit for the power. How do you know the exhaust didn't give you 15 and the cams 15?
Either way the exhaust is whats allowing you to make that power. The cams can't give you 30rwhp if your system is not optimized. Plus if you didn't have the exhaust done your exhaust gas temps would be higher which could cause detonation thus blowing the motor, melt a valve or at the very least would cause your timing to be reduced thus cutting hp. Not to mention the hp lost as the engine would now have to work to push the air through the exhaust system.
Last edited by twinskrewd; May 30, 2014 at 10:41 PM.
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From: WA
WIDJ- No offense intended here. I recall the day we spoke of buying cams for your truck. We still need this data. This is why I went into all this detail on using the XCAL on the Stage III thread.
I firmly believe you would know if anything maxed out. But JDM backed you off and put you at 14 PSI, correct? And wanted to keep you detuned. Then Chris and I got into the picture to drop charge temps to raise your limitations in the end and avoid limiting or detuning the Roush. We are trying to fully utilize that 1 bar (14.7 PSIG). Now, as it stands, if the data confirms it, you are most likely OK and have adequate fuel supply. We would know if you had maxed out the injectors or pump, the tuner would have lifted, and set your rev limit to 5K or lower until you could upgrade.
The cool part is, JDM will be surprised you gained from these mods without maxing out everything. Data pending, this is progress! Now you are paving your way. Love the cams? Heh!
Please ask your tuner for the SCT collected EEC data Twinscrewd requested. We need this to help everyone. I know there are 6 of you running this setup, all going the same direction. This is imperative. And why Twinscrewd and I offer to help you set up your XCALs so we can do this right.
We NEED your help here WIDJ AND Corey.
Props to JDM for another happy customer!
I firmly believe you would know if anything maxed out. But JDM backed you off and put you at 14 PSI, correct? And wanted to keep you detuned. Then Chris and I got into the picture to drop charge temps to raise your limitations in the end and avoid limiting or detuning the Roush. We are trying to fully utilize that 1 bar (14.7 PSIG). Now, as it stands, if the data confirms it, you are most likely OK and have adequate fuel supply. We would know if you had maxed out the injectors or pump, the tuner would have lifted, and set your rev limit to 5K or lower until you could upgrade.
The cool part is, JDM will be surprised you gained from these mods without maxing out everything. Data pending, this is progress! Now you are paving your way. Love the cams? Heh!
Please ask your tuner for the SCT collected EEC data Twinscrewd requested. We need this to help everyone. I know there are 6 of you running this setup, all going the same direction. This is imperative. And why Twinscrewd and I offer to help you set up your XCALs so we can do this right.
We NEED your help here WIDJ AND Corey.
Props to JDM for another happy customer!
JDM is NOT backing me up for 14PSI on a stock engine, Jim is recommending me to put back my 3.0 upper pulley to lose 2PSI.
And he said that Mustang dyno generally reads 10-20 % lower than a dyno jet.
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From: WA
so today I did a test drive and here are my impressions of getting those hot rod cams:
pro
-performance, quicker response
cons
-the truck cab is shaking like there would be a bad misfire
-I was expecting a much louder choppy noise at idle, this is just a barely noticeable, I think only people knowing what cams are will notice, otherwise not impressive..
-I can hear some metallic noise at idle and sometimes when accelerating, IMO it makes the truck sound cheap
-idle noise is not like the videos of mustang with cams on youtube
-I still have an issue (non related to the cams) in my engine, it seems like the engine as a cough at full load sometimes
So far I am not impressed, I've spent $1800 and I wonder why, if it was to redo, I wouldn't do it for hot rod cams, but real performance cams
video of cams at cold start
pro
-performance, quicker response
cons
-the truck cab is shaking like there would be a bad misfire
-I was expecting a much louder choppy noise at idle, this is just a barely noticeable, I think only people knowing what cams are will notice, otherwise not impressive..
-I can hear some metallic noise at idle and sometimes when accelerating, IMO it makes the truck sound cheap
-idle noise is not like the videos of mustang with cams on youtube
-I still have an issue (non related to the cams) in my engine, it seems like the engine as a cough at full load sometimes
So far I am not impressed, I've spent $1800 and I wonder why, if it was to redo, I wouldn't do it for hot rod cams, but real performance cams
video of cams at cold start
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Joined: Dec 2009
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From: North Carolina
Not saying any of this to scare you. It's what's happened over and over again to many on this forum as well as others. Seen a lot of Roush charged trucks pop motors at 420rwhp and 10psi. Most of it has to do with heat and failure on the owners part to upgrade the heat exchanger system. The fuel pre-detonates and a rod will snap. The Lightnings did it too. Especially at the top of third gear shifting in to OD at WOT. That sudden change in rpm and the rods would snap. Hopefully JDM locked out your ability to shift in to OD at WOT. My Troyer tune is that way.
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Joined: Dec 1997
Posts: 9,417
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From: Windsor,Ontario,Canada
According to the specs on this cam you have 5.25° of overlap. That is not very much for creating the lope at idle that you are seeking. 10° would make more of the sound that you want. The only problem with that is that @ 14+ psi you will be blowing some of your fuel mix out the tail pipe.