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post #1 of 29 Old January 26th, 2016, 06:59 PM Thread Starter
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Hotrod cams powerband

I got a 2007 GT some months back to go along with my 2003 Cobra. Car already had basic bolt ons including LT headers. I'm gonna install the FRPP Hot Rod cams in a month or so, while searching around I wanted to know how much these cams increase the engines redline? Most dyno graphs iv looked at with the FRPP cams show its making peak power a little after 6k rpms. Now I know im entering the danger zone pushing this motor past 6500rpms on the factory valve train and internals, what is the limiting factor to these 3v motor when spinning that high?

2003 Cobra

VMP TVS/ 3.2 upper/4lb lower JLT HB CAI Accufab TB SCT BA3000

Fore Level 2 Return/AEM pumps 80lb FRPP injectors

Killer Chiller w/3 way bypass valve MAC LTs, o/r H, 10 series

26 spline Mcleod RXT


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post #2 of 29 Old January 26th, 2016, 09:11 PM
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First, cams don't increase redlines.

My first tune with FRPP cams had the redline set at 7,000, and I felt that was high. After my build I 7,000 was no issue, and except they robbed boost.

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post #3 of 29 Old January 26th, 2016, 09:25 PM
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after 7000 rpm if you do not have lockouts i have heard you will have issues with the factory vct causing the pistons to contact the valves.... this is what i have been told anyways

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post #4 of 29 Old January 26th, 2016, 09:42 PM Thread Starter
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First, cams don't increase redlines.
.
Cams do change where power is made in the RPM band that changes shift points thats what i meant. Those who do after the FRPP cams what rpm are your shift points at?

2003 Cobra

VMP TVS/ 3.2 upper/4lb lower JLT HB CAI Accufab TB SCT BA3000

Fore Level 2 Return/AEM pumps 80lb FRPP injectors

Killer Chiller w/3 way bypass valve MAC LTs, o/r H, 10 series

26 spline Mcleod RXT


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post #5 of 29 Old January 26th, 2016, 09:45 PM
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i wish i could tell you but i just guess i never dynod the car to figure it out

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post #6 of 29 Old January 26th, 2016, 09:57 PM Thread Starter
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i wish i could tell you but i just guess i never dynod the car to figure it out
When you go WOT through the gears what rpm do you shift at?

2003 Cobra

VMP TVS/ 3.2 upper/4lb lower JLT HB CAI Accufab TB SCT BA3000

Fore Level 2 Return/AEM pumps 80lb FRPP injectors

Killer Chiller w/3 way bypass valve MAC LTs, o/r H, 10 series

26 spline Mcleod RXT


651rwhp 647rwtq on e85
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post #7 of 29 Old January 26th, 2016, 10:25 PM
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i pull to 6500 but my butt dyno tells me that i am still making power past that at least a lot more then stock where it kinda felt like it fell on its face after like 6300

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post #8 of 29 Old January 27th, 2016, 12:18 AM
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Originally Posted by 2003cobra22 View Post
while searching around I wanted to know how much these cams increase the engines redline? Most dyno graphs iv looked at with the FRPP cams show its making peak power a little after 6k rpms. Now I know im entering the danger zone pushing this motor past 6500rpms on the factory valve train and internals, what is the limiting factor to these 3v motor when spinning that high?
With the stock valve springs you shouldn't rev the engine past 6800rpm or you risk valve float with possible piston to valve contact. Maximum HP with Hot Rod cams usually comes in at ~6200rpm so you could have the rev limiter raised to 6700rpm.


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post #9 of 29 Old January 27th, 2016, 01:42 AM
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What ^^^^ said my stage 2 comp cams are set to 6700 make peak power at 6200
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post #10 of 29 Old January 27th, 2016, 04:24 AM Thread Starter
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With the stock valve springs you shouldn't rev the engine past 6800rpm or you risk valve float with possible piston to valve contact. Maximum HP with Hot Rod cams usually comes in at ~6200rpm so you could have the rev limiter raised to 6700rpm.
Would aftermarket valve springs make it safe to rev to 7000 with factory internals

2003 Cobra

VMP TVS/ 3.2 upper/4lb lower JLT HB CAI Accufab TB SCT BA3000

Fore Level 2 Return/AEM pumps 80lb FRPP injectors

Killer Chiller w/3 way bypass valve MAC LTs, o/r H, 10 series

26 spline Mcleod RXT


651rwhp 647rwtq on e85
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post #11 of 29 Old January 27th, 2016, 05:28 AM
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Would aftermarket valve springs make it safe to rev to 7000 with factory internals
The answer is yes but it would be rather pointless 'cause the power would be tailing off past 6500rpm anyway. That is, unless you swap out the stock intake manifold for a Ford Racing unit. Then the engine would pull to 7k with ease.
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post #12 of 29 Old January 27th, 2016, 11:11 AM
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The answer is yes but it would be rather pointless 'cause the power would be tailing off past 6500rpm anyway. That is, unless you swap out the stock intake manifold for a Ford Racing unit. Then the engine would pull to 7k with ease.
ya i forgot to mention that i have a frpp intake manifold and jlt intake. that along with the cams pushed my power up in the curve and that is why im putting in 4.10s this spring to get me into the power faster

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post #13 of 29 Old January 27th, 2016, 12:23 PM Thread Starter
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The answer is yes but it would be rather pointless 'cause the power would be tailing off past 6500rpm anyway. That is, unless you swap out the stock intake manifold for a Ford Racing unit. Then the engine would pull to 7k with ease.[/QUOTE]
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The answer is yes but it would be rather pointless 'cause the power would be tailing off past 6500rpm anyway. That is, unless you swap out the stock intake manifold for a Ford Racing unit. Then the engine would pull to 7k with ease.
ya i forgot to mention that i have a frpp intake manifold and jlt intake. that along with the cams pushed my power up in the curve and that is why im putting in 4.10s this spring to get me into the power faster
That's good to know factory 3v internals can handle the higher rpms car has 4.56s so a higher powerband would be welcome..with the frpp intake manifold since it deletes the CMCVs does the exhaust decel go from smooth to popping?
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post #14 of 29 Old January 27th, 2016, 12:46 PM
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My red-line is at 6800, my cams seem to kick in at about 5,000 to red line. This picture is before I changed my intake.
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Black 2008 Mustang Bullitt, ID#2029
Hot Rod Cams, twin 62mm TB.
Barton shifter, 4.10's & 8.8" AxleGirdle, 3.5" CF, DS.
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post #15 of 29 Old January 27th, 2016, 02:05 PM
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Originally Posted by 2003cobra22 View Post
The answer is yes but it would be rather pointless 'cause the power would be tailing off past 6500rpm anyway. That is, unless you swap out the stock intake manifold for a Ford Racing unit. Then the engine would pull to 7k with ease.
That's good to know factory 3v internals can handle the higher rpms car has 4.56s so a higher powerband would be welcome..with the frpp intake manifold since it deletes the CMCVs does the exhaust decel go from smooth to popping?[/QUOTE]

i guess it was hard for me to tell if the charge motion deletes made the exhaust poppy but the car does pop a little bit on decel i do know that the manifold and the cams changed the exhaust note a lot

here is a short exhaust clip

https://www.instagram.com/p/BA-qHFBB...ken-by=bwyss12

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post #16 of 29 Old January 27th, 2016, 02:56 PM
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My CMDP's were my last mod I did, my exhaust got louder after.

---------- Post added at 06:56 PM ---------- Previous post was at 06:43 PM ----------

If you look close to my dyno sheet you will see some changes that will changed the attitude your Stang.
4000rpm to 5300 rpm above 300 rwtq with stock cams.
3500 rpm to 5500 rpm above 300 rwtq with HotRod cams.
At 6500 rpm 230 rwtq with stock cams and 270 rwtq with HT cams with about more 35 rwhp.
Hot Rod cams are lethal with 4.10's

Black 2008 Mustang Bullitt, ID#2029
Hot Rod Cams, twin 62mm TB.
Barton shifter, 4.10's & 8.8" AxleGirdle, 3.5" CF, DS.
Kook's LT/H-Pipe, Corsa Black Xtremes
Steeda UDP/CMDP/LCA/Adjustable UCA.
BBR tuned 340rwhp/335rwtq
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post #17 of 29 Old January 27th, 2016, 03:48 PM
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The CMDP's change the exhaust quite a bit, I much prefer how mine sounds with them. Idle sounds better, deceleration sounds better. It definitely pops a little more on decel but I like it.

2005 Mustang GT
CMS Stage 1 cams, Lito Tune, C&L Racer, CMDP, SR UDP, JBA LT's & catted H, FRPP Touring AB, Koni STR.T, BMR springs, J&M upper/mount, BMR lowers & brackets, J&M pb, Steeda Tri-Ax, Brembos
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post #18 of 29 Old January 27th, 2016, 08:53 PM
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Stock internals will not last long at 7000rpm....although I shift around there as well on occasion (accident). My stepper motor on the tach is sometimes off a bit and I'll hit the 2step rev limit I set at 7050.

07 gt, CMS cams, hurst, CAI/tuned, LT's, o/r h, m80's, FRPP mani, UDP, lowered with steeda 1.25/1.5, exedy mach 400/race flywheel, 1-pc DS, BMR upper/lowers, 4.10's, CHE brace with TL's, and a few other things that dont add up to much.
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post #19 of 29 Old January 27th, 2016, 09:02 PM Thread Starter
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Stock internals will not last long at 7000rpm....although I shift around there as well on occasion (accident). My stepper motor on the tach is sometimes off a bit and I'll hit the 2step rev limit I set at 7050.
Whats the weakest link with the stock internals? How would the factory oil pump hold up against higher rpms?

2003 Cobra

VMP TVS/ 3.2 upper/4lb lower JLT HB CAI Accufab TB SCT BA3000

Fore Level 2 Return/AEM pumps 80lb FRPP injectors

Killer Chiller w/3 way bypass valve MAC LTs, o/r H, 10 series

26 spline Mcleod RXT


651rwhp 647rwtq on e85
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post #20 of 29 Old January 28th, 2016, 12:45 AM
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weakest link as far as what power levels or rpm range

06 Mustang GT
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