Mark Houlahan
Brand Manager, Mustang Monthly
March 14, 2005
Since we're sticking with the stock short-block and pistons at thistime, our cylinder head choices (in relation to valve size) were limitedin the AFR catalog. We chose AFR's 165cc "Comp" castings (PN X1404F,$1,699), which feature upgraded quality 1.90/1.60 valve sizes, upgradeddual springs with dampers, a finer CNC-porting, with better port shapethan standard 165s, 10 degree locks, and more. AFR's upgrade to the Compporting is new on the 165 heads. We also had AFR assemble our heads withits titanium retainers (PN 8504; $99), and then flat mill the heads toachieve 55cc chambers ($150).

If you take a minute to think about it,even the "newest" 5.0 Mustangs are 10 years old now. That's a lot ofmiles, and stress, on Ford's venerable small-block. While this couldquickly escalate into a new short-block-versus-performance-upgradesdiscussion, it has been our experience that once a Mustang is out ofwarranty and the loan is paid off, most owners want to experience morepower, not just a freshened short-block. Once paid off, their loanpayment has been quietly tucked away for upgrades, and now they're readyto have some fun with their Mustang. Sound familiar? Besides, all thoseupgrades you're bolting onto your tired short-block can easily betransferred to a new short-block when the time comes.

To that end, wedecided to begin some upgrades on Associate Editor Johnson's yellownotch. The used 5.0 underhood is of unknown mileage, but it doesn'tsmoke or make noise, so we opted to start the spiraling madness with ahead swap, specifically AFR 165s with its "Comp" port program. We alsophoned Comp Cams for a nice, lumpy custom cam grind and all thesupporting bits. We wanted to install an intake and headers, plus someother induction and fuel upgrades, but there's only so much room in fourpages. So, we'll follow up this project in the coming months withheaders, intake, injectors, mass air and induction parts, and so on.

Horse Sense: With the abundance of cylinder heads, intakes, and camprofiles available today for the 5.0, it's easy to start feelinglight-headed when going through all the catalogs. Staying with a packagefrom one manufacturer is often a good way to make sure everything willwork together, but don't be afraid to use multiple vendors. Just makesure you talk to their tech departments for product recommendations andto verify what parts will work with theirs. From there, you can make alist of suitable project part candidates.

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ON THE DYNO
Key: S = Stock HCR = Heads, Cam, and Rockers G/L = Gain/Loss

RPMS POWERS TORQUEAIR/FUELHCR POWERHCR TORQUEAIR/FUELG/L POWERG/L TORQUE
2,20090.2215.210.492.8221.610.7+2.6+6.4
2,30095.1217.110.298.3224.610.7+3.2+6.9
2,400100.0218.810.1103.6226.610.8+3.6+7.8
2,500104.8220.110.1108.1227.210.8+3.3+7.1
2,600109.2220.610.1112.3226.910.8+3.1+6.3
2,700114.2222.110.1117.1227.810.8+2.9+5.7
2,800119.7224.610.1122.6230.010.7+2.9+5.4
2,900126.5229.010.1128.1232.110.7+1.6+3.1
3,000133.1233.110.1133.9234.410.7+.8+1.3
3,100138.6234.910.1140.1237.410.7+1.5+2.5
3,200143.8235.910.1147.5242.110.7+3.7+6.2
3,300148.5236.410.1156.1248.510.8+7.6+12.1
3,400153.5237.110.1164.2253.610.7+10.7+16.5
3,500158.9238.510.1171.3257.110.7+12.4+18.6
3,600163.4238.310.1177.1258.410.8+13.7+20.1
3,700167.2237.410.1182.0258.310.9+14.8+20.9
3,800171.4236.910.1187.4259.010.9+16+22.1
3,900175.1235.710.2192.1258.611.0+17+22.9
4,000177.9233.610.3197.3259.011.0+19.4+44.8
4,100180.1230.810.3202.1258.911.0+22+28.1
4,200181.9227.510.3206.4258.111.0+24.5+30.6
4,300182.8223.310.3209.9256.310.9+27.1+33
4,400181.5216.710.2212.2253.310.9+30.7+36.6
4,500181.7212.110.2213.6249.310.9+31.9+37.2
4,600181.5207.210.1214.9245.410.9+33.4+38.2
4,700182.1203.510.2215.0240.210.9+32.9+36.7
4,800182.1199.310.2214.8235.110.8+32.7+35.8
4,900180.7193.710.1213.2228.510.7+32.5+34.8
5,000178.8187.810.1211.0221.710.5+32.2+33.9
5,100175.3180.510.1207.8214.010.5+32.5+33.5
5,200170.3172.010.1204.9206.910.5+34.6+34.9
5,300162.8161.310.1201.5199.710.5+38.7+38.4
5,400159.1154.710.1198.0192.610.4+38.9+37.9
5,500155.9148.810.1197.6188.710.4+41.7+39.9
5,600149.9140.610.1192.7180.710.5+42.8+40.1
5,700142.9131.610.1188.0173.310.5+45.1+41.7
5,800137.5124.510.1185.2167.710.5+47.7+43.2
5,900131.9117.410.1182.9162.810.6+51+45.4

Jake LaMotta recently sold his portable Dynojet and has taken deliveryof an in-ground Dynojet for the expanding LaMotta Performance shop.Unfortunately for us, when we came by for the wrench-bending session,the Dynojet was not yet "six feet under" and was less than operational.The light bulb lit up over Johnson's head (I know, a first), and hesuggested the Superflow chassis dyno at nearby Superchips (just 10minutes from LaMotta's Longwood, Florida, shop). We gave Dave Caine acall at Superchips, and he was more than accommodating for ourearly-morning and late-evening dyno sessions in the same day. Now forthe meat and potatoes you've been wanting. We included the air/fuel inthese dyno numbers so you can see how rich this car is running (stockelectronics and fuel pressure regulator). There's a lot more in thiscar's tune, that's for sure, and while 32 hp and 21 lb-ft of torque atthe peaks is nice, you can see in our gain/loss column that thiscombination really likes rpm with the gains climbing with each rpmincrement, to a best of 51 hp and 45.4 lb-ft of torque, both at 5,900.Johnson's ride already had an off-road X-pipe and a DynoMax UltraFloafter-cat system on it, plus a 70mm BBK throttle body and EGR spacer.Other than that, the little yellow notch is stone stock. As soon as weget our intake, headers, injectors, and mass air meter, look out foranother story and even better numbers.

Sources

Air Flow Research
Valencia, CA 91355
661-257-8124
AirFlowResearch.com
Comp Cams
Memphis, TN 38118
800-999-0853
http://www.compcams.com
LaMotta Performance
Longwood, FL 32750
407-695-4549
http://www.lamottape...
Superchips
888-227-2447
www.superchips.com