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Old 10-05-2017, 08:41 PM   #1
JaredWOT
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Big NA 4.6 Build

I am ask because I am in the process of a NA build for my 03 Mach 1. I know it's more expensive in the long run than boost, but I would like to see how much power I can get from the car without boost or increasing displacement.
My build list is p&p 10" short runner (which I already have on hand - made by na svt), 90mm MAF, Accufab 60mm TB, JLT cai, Meziere electric water pump, March Performance alternator pulley, March Performance harmonic balancer/fluid damper, billet oil pump gears, Cloyes adjustable cam gears, forged Manley h-beam rods, forged JE flat top pistons, MHS stage 3 CNC head package, MHS stage 3 cams (or custom cams by na svt), Deatsch Werks 340lph electric fuel pump, Ford Performance 39# fuel injectors, and custom dyno tune. Compression will end up being about 11.1
Car already has full o/r exhaust with LT headers (will upgrade to 1-7/8" kooks eventually)
I am doing a cobra t56 swap as well. Just waiting on the single piece aluminum driveshaft to arrive. McLeod clutch and aluminum flywheel, along with an MGW short throw shifter will complete the tranny build. I know the general recommendation is to just build the tr3650, but I got a great deal on the t56 and can keep the tr3650 on hand if I ever want to put a built m5 back in.
I am well aware of the cost for such an involved NA build, so HP per dollar is not my concern. It is more of a no boost HP per liter project.
The stage 3 CNC head porting included 0.5mm oversize valves, valve springs and retainers, and valve job. The MHS stage 3 cams have 230/228 duration, .480"/.480" lift, 109+3 lobe sep angle, 106/112 center lines.
Car is my DD, but I live only 10 miles away from work. It seems, from research and word of mouth, that it would still be daily driveable with stage 3 cams, given at least a 4.10 gear ratio, which I already have. I am more than willing to try 4.30 or 4.56 gears if need be though. I have been told to steer clear of gears made by anyone other than Ford Performance though, and they do not make 4.30's.
What I could really use is some advice from the experts on what to keep on the build list, or drop. I know a few things may not be needed, but I would rather plan on the possibilities and drop a few insignificant items than underestimate the requirements.
Again, HP per dollar is not the concern. I just need a critique of the build to know where I'm going wrong, and where I'm right.
Some thoughts from na svt, roy, and nazman would be great.
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Old 10-05-2017, 09:15 PM   #2
DSG2003Mach1
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Re: Big NA 4.6 Build

if you want input from NA SVT its probably best to go in the NA SVT cams and intakes facebook page
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Old 10-06-2017, 12:23 AM   #3
Vndcatr
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Re: Big NA 4.6 Build

Yes! Pretty much the path i took . How much power you looking to make? They do have great advice, I learned from my own mistakes on alot lol. Im making about 400rw with stock head porting and stock length intake runners . You have a great build list..Stick with it lol , But these motors are absolute beasts Naturally aspirated.
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2001 Zinc yellow SVT Cobra
Forged 11.5CR 284ci
Comp 106500 cams - Degreed
01 cobra Heads - tastefully modded
Roys ported/polished Intake
Kooks longtubes, Magnaflow catback
D&D T3650, Mgw shifted
FTB Goodies, 4.30s, FRPP diff cover, 31 splined IRS
04 cobra interior , black termy seats, Speedhut gauges
Tubular K, MM coilovers/ Koni SA yellows
Starkweather tuned, 24* timing on 91 octane
11.7 @ 117mph 1.62 60ft. Raceweight 3200lbs

Next up:Sullivan intake and hat, self tuning..
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Old 10-06-2017, 12:31 PM   #4
TKat13
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Re: Big NA 4.6 Build

Looks like a fun project. Good luck.

I always wondered if it would be cheaper to do a coyote swap to reach 400 rwhp. Something I keep asking myself if I should have gone that route.
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Darrell
Black '04 Mach 1
Track Times (bone-stock w/drs):60 ft - 1.90 | 1/8 - 8.67
(100 shot,E85,4:10s,Street tire):60 ft - 1.67 | 1/8 - 7.88
New build - 750rwhp; not track tested (yet)
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Old 10-06-2017, 10:05 PM   #5
JaredWOT
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Re: Big NA 4.6 Build

I'm sure a 5.0 swap would be easier, but I have no idea about cheaper.
I am looking for at least 400rwhp. I believe with the intake, cams, and crazy head work/valve job/compression, that it is more than achievable. Everything in my build list is meant to compliment the rest of the mods in order to reap the most benefits from each one.
What brand would you suggest for 4.30 gears?
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Old 10-07-2017, 01:22 AM   #6
TKat13
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Ford racing gears, they are the quiet, motives seem to be a bit loud
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Darrell
Black '04 Mach 1
Track Times (bone-stock w/drs):60 ft - 1.90 | 1/8 - 8.67
(100 shot,E85,4:10s,Street tire):60 ft - 1.67 | 1/8 - 7.88
New build - 750rwhp; not track tested (yet)
Mods: Build Log
Paint&Body
Tuned by Manny @ HPP
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Old 10-07-2017, 01:23 AM   #7
TKat13
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My wife's '16 got 400rwhp with cold air intake, cat back and a dyno tune.
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Darrell
Black '04 Mach 1
Track Times (bone-stock w/drs):60 ft - 1.90 | 1/8 - 8.67
(100 shot,E85,4:10s,Street tire):60 ft - 1.67 | 1/8 - 7.88
New build - 750rwhp; not track tested (yet)
Mods: Build Log
Paint&Body
Tuned by Manny @ HPP
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Old 10-07-2017, 02:37 PM   #8
littlemags
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Re: Big NA 4.6 Build

yeah...your definitely going to go with 4.30's at least...i ran 4.30 with my p1 and if I would have been NA I would have gone 4.56 for sure.
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Old 10-07-2017, 03:08 PM   #9
JaredWOT
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Re: Big NA 4.6 Build

Does Ford make 4.30 gears for the 99-04? I think I have only seen 4.10 and 4.56 for the new edge.
How would 4.56 gears do on milage with a cobra t56 swap? The car is my daily, so I would like to get at least 200 miles out of each tank.
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Old 10-07-2017, 11:14 PM   #10
Vndcatr
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Re: Big NA 4.6 Build

Quote:
Originally Posted by JaredWOT View Post
Does Ford make 4.30 gears for the 99-04? I think I have only seen 4.10 and 4.56 for the new edge.
How would 4.56 gears do on milage with a cobra t56 swap? The car is my daily, so I would like to get at least 200 miles out of each tank.
No ford doesnt make a 4.30 gearing. I have motive, there honestly not even that loud lol.. But 4.56s are the way to go!
__________________
2001 Zinc yellow SVT Cobra
Forged 11.5CR 284ci
Comp 106500 cams - Degreed
01 cobra Heads - tastefully modded
Roys ported/polished Intake
Kooks longtubes, Magnaflow catback
D&D T3650, Mgw shifted
FTB Goodies, 4.30s, FRPP diff cover, 31 splined IRS
04 cobra interior , black termy seats, Speedhut gauges
Tubular K, MM coilovers/ Koni SA yellows
Starkweather tuned, 24* timing on 91 octane
11.7 @ 117mph 1.62 60ft. Raceweight 3200lbs

Next up:Sullivan intake and hat, self tuning..
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Old 10-08-2017, 02:09 AM   #11
JaredWOT
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Re: Big NA 4.6 Build

And 4.56's won't kill gas mileage?
I know the 6 speed gets better mpg than the 5 speed in any case, but would that steep of gearing make it inconsequential?
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Old 10-08-2017, 02:25 PM   #12
TKat13
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Re: Big NA 4.6 Build

Quote:
Originally Posted by JaredWOT View Post
And 4.56's won't kill gas mileage?
I know the 6 speed gets better mpg than the 5 speed in any case, but would that steep of gearing make it inconsequential?
IIRC; the 6th gear ratio in cobra was a .63; the 5th gear ratio in the Mach is a .62. Not much difference, the Mach had a huge gap between 4th and 5th.
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Darrell
Black '04 Mach 1
Track Times (bone-stock w/drs):60 ft - 1.90 | 1/8 - 8.67
(100 shot,E85,4:10s,Street tire):60 ft - 1.67 | 1/8 - 7.88
New build - 750rwhp; not track tested (yet)
Mods: Build Log
Paint&Body
Tuned by Manny @ HPP
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