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4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

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Old 10-28-2009, 08:12 PM   #1
dg98gt
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Vehicle: 1998 Mustang GT and 2011 Mustang 5.0
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Unhappy Dynoed Today!

Well, I got the car dynoed again today with the addition of a 2.70" pulley, a 10% OD crank pulley and a 45-degree angle from bypass valve to powerpipe because I was getting some backwash issues with my draw-thru MAF causing some slight driveability problems.

Well, driveability is very good now.

Now, the before:

525rwhp @ 6400rpm
454rwtq @ 5000rpm

And the after:

548rwhp @ 5600rpm
516rwtq @ 5000rpm

Now this was with 16.2 lbs. of boost, 18 degrees timing, 93 octane.

I am real happy with the torque. Pulls like crazy now.

The problem is I was having spark blowout above 5600rpm, so the HP and TQ nosedived above that RPM.

I think that pulley combo is capable of 19lbs at 6500rpm. I hope to get 580rwhp if I can get the spark issue resolved.

Ignition System: TR-6 plugs gapped at .032, MSD coil packs, FMS plug wires. I had an MSD DIS-4, but that took a crap on me a long time ago, and was causing a miss. I bypassed it and everything has been fine up till now.

Later,
Derrick
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'98 - Built shortblock, ported PI heads/intake, MPH cams, intercooled-8ribbed vortech strim (2.70"), dragon 75mm TB and plenum, complete fuel system, 3.73's, Nitto Drag Radials....570rwhp, 515rwtq

'11 - JLT CAI, JLT oil separators, Roush Axle-backs, BBR93 tune.....402rwhp, 377rwtq
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Old 10-29-2009, 05:04 AM   #2
rthouck
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Kenne Bell Boost-a-spark! Or a Plasma Booster ignition (5.0 Mag tested it with great results) I've been using it for about 1.5-2 years and I haven't had any problems.

Here's the article on a 5.0

http://www.mustang50magazine.com/how...ter/index.html
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Old 10-29-2009, 08:15 AM   #3
dg98gt
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Attached is the dyno sheet.
Attached Images
File Type: jpg 10-28-09 Dyno.jpg (15.5 KB, 12 views)
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'98 - Built shortblock, ported PI heads/intake, MPH cams, intercooled-8ribbed vortech strim (2.70"), dragon 75mm TB and plenum, complete fuel system, 3.73's, Nitto Drag Radials....570rwhp, 515rwtq

'11 - JLT CAI, JLT oil separators, Roush Axle-backs, BBR93 tune.....402rwhp, 377rwtq
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Old 10-29-2009, 08:15 AM
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