74_5.0L_Z Posted January 30, 2009 Share Posted January 30, 2009 After thrashing away in the garage for the last several weeks, I got the new engine running last weekend. I set the initial timing and fuel pressure, and tried to get the car to idle. The engine ran but had a hunting idle and would eventually stall after a few minutes. Well, I took the car to a friends shop, and we put it on his chassis dyno to break in the new engine and do some baseline tuning. This was the first time that I had ever done the chassis dyno thing, and I must say that it was a lot of fun. We strapped the car down on his Superflow AutoDyn 30 chassis dyno, and he set the dyno up so that I could essentially drive the car and put some miles on the engine. After, about the equivalent of 20 miles of varying load, varying speed driving we decided to make a first pull. The first pull netted about 335 rwhp and the O2 sensors were reading about 11.5:1 at idle and would dip to 10.3:1 under full power (black smoke was coming out of the tail pipe). After the first run, we decided that a fuel pressure adjustment was in order. I gave the adjustable fuel pressure regulator 2 turns of adjustment to decrease my fuel pressure and my idle air fuel ratio improved to 12.0:1. We drove the car on the dyno some more to make sure that the AF stayed in the safe region and then made a second pull. This time the peaks were 348 rwhp at 5400 rpm and 363 rwTq at 4500 rpm. The AF ratios were still a bit rich (~11.5:1) under full throttle, but now the car felt a ton better, sounded better, and now would idle without hunting. I made a third run that was pretty much a carbon copy of the second. After that we quit because my pan gasket was leaking a bit. With a little more tuning of the fuel pressure, I think 360 rwhp is attainable, and he says that with a chip we could get even more. We'll do that another day. Here is the graph of the third run: Quote Link to comment Share on other sites More sharing options...
ckelly78z Posted January 30, 2009 Share Posted January 30, 2009 Congratulations, those are some really good numbers for a motor that hasn't been driven and tuned properly. Quote Link to comment Share on other sites More sharing options...
V8INtheZ Posted January 31, 2009 Share Posted January 31, 2009 Wow thats awesome dude! Do you really need that much power for the racing you do? I was gonna build a 400 Crank HP 5.0 but decided it would be too hard to control. I know you put some good track miles on your car so I bet you have a good reason for an engine that powerful. Very nice job! Quote Link to comment Share on other sites More sharing options...
74_5.0L_Z Posted January 31, 2009 Author Share Posted January 31, 2009 It will be a little more interesting to autocross than before (it was already a handful). My goal is to have a car that kicks butt in Autocross and that will run 120 mph in the quarter mile. I'll find out soon if I can get the 120 mph run. With the old motor and ~300 whp I ran 113mph through the quarter. With the new engine's dyno numbers, I'm predicting 121 mph in the quarter. The car was already a pretty good autocross weapon with the old engine, and lack of power was never a concern. I will have to adapt to the new engine and also get some bigger tires. Sometime around April, I plan to switch from my current Hoosier 245/45/16 A6's to some 275/35/15 A6's. Quote Link to comment Share on other sites More sharing options...
V8INtheZ Posted January 31, 2009 Share Posted January 31, 2009 Well, that sounds like a great problem to have, lol This new engine is EFI too right? Can you post a quick summary of the old and new engines? Too bad we live on opposite sides of the playground, I would very much like to see your car in person. Quote Link to comment Share on other sites More sharing options...
74_5.0L_Z Posted January 31, 2009 Author Share Posted January 31, 2009 Old engine: 1989 5.0L engine from highway patrol mustang. I got this engine from a junkyard and installed it and the T5 transmission in my car in 2000. When initially installed in my car, the engine was completely stock and had at least 100,000 miles. In completely stock form, the car ran 13.50's at 100mph. I started adding parts after about a year of daily driving. First, I added Ford motorsport 1.72:1 roller rockers, 24# injectors and 73mm MAF. This got the car to 13.20's at 103 mph. Then I added a Cobra Intake, Edelbrock Performer Heads, Crower 15511 cam, and 65mm TB. This got the car to 12.40 at 113 mph. All of this on the stock (100,000 mile plus) bottom end. I drove it this way for about 6 years during which the car saw ~10,000 street miles, ~100 drag strip passes, and about 250 autocross runs. This is the car with the old engine back in november: http://www.youtube.com/watch?v=8HrbHKZyRNo&feature=channel_page Lately, the engine was starting to sound like a lot of loose parts flying in close formation. It rattled a little on start-up, but still ran well, still had good oil pressure, but was starting to smoke a little. So I thought it was time for a new bottom end. New engine: New Ford 5.0L block with stock 4.000 bore. Scat cast steel 3.25 inch stroke crank and 5.400 rods. Mahle 10.3:1 compression forged pistons, rings and pins Fidanza aluminum flywheel Romac Light weight Damper main stud girdle The whole rotating assembly has been dynamically balanced. The heads, cam, and rocker arms are the same parts used on the old engine. I replaced the cobra intake, 65mm TB, and 24# injectors with a Performer RPM intake, 70mm TB, and 30# injectors. I replaced the calibration tube in my 73mm MAF to match the new injectors. The engine is still breathing through the same crappy block hugger headers and exhaust as before. The heads, cam, and exhaust are probably restricting the new engine from making more power, but I don't know that I will be able to use much more for autocross anyways. Quote Link to comment Share on other sites More sharing options...
V8INtheZ Posted February 1, 2009 Share Posted February 1, 2009 Very cool. What block did you get, one of the Darts? Quote Link to comment Share on other sites More sharing options...
74_5.0L_Z Posted February 1, 2009 Author Share Posted February 1, 2009 No, I am just using a stock 5.0L block. For the power that I am making and am likely to make in the forseeable future, the stock block is sufficient. Also the stock block is considerably lighter than any of the sturdier replacements. Quote Link to comment Share on other sites More sharing options...
jt1 Posted February 1, 2009 Share Posted February 1, 2009 Looking good. Get her to 12.5 across the board and you'll go 360 or probably a little more. What are the cam specs? John Quote Link to comment Share on other sites More sharing options...
74_5.0L_Z Posted February 2, 2009 Author Share Posted February 2, 2009 Here are the specs on the cam that is installed: http://www.crower.com/misc/cam_spec/cam_finder.php?part_num=15511 The specs listed are for 1.60 rocker arms, but I am running 1.72:1. Therefore, my lift is 0.522/0.503, and my duration is a little increased. This cam is on the small side for my engine, and, I would like to replace it one day. If I stick with a hydraulic roller set-up, I was thinking of using one of these: http://www.crower.com/misc/cam_spec/cam_finder.php?part_num=15512 http://www.crower.com/misc/cam_spec/cam_finder.php?part_num=15513 Even better, I would like to ditch the hydraulic roller and switch to a mechanical roller set-up. Unfortunately, that gets into a lot more money. Quote Link to comment Share on other sites More sharing options...
jt1 Posted February 3, 2009 Share Posted February 3, 2009 That's a nice dyno run with that cam. I would think you've got a good bit of room for more. jt Quote Link to comment Share on other sites More sharing options...
74_5.0L_Z Posted February 3, 2009 Author Share Posted February 3, 2009 One of these days, I hope to find out how this engine responds to more cam and some better heads. First however, I want to back up the current dyno numbers with a trip to the quarter mile. Dyno numbers are just numbers until you see a matching mph in the quarter. Quote Link to comment Share on other sites More sharing options...
DRZ man Posted February 3, 2009 Share Posted February 3, 2009 I wonder what kind of EMS are you using?? Quote Link to comment Share on other sites More sharing options...
74_5.0L_Z Posted February 3, 2009 Author Share Posted February 3, 2009 It is just a plain old Ford EEC-IV (A9P) processor with all of the factory sensors. The only changes are that I am using a C&L Mass Air Meter with a calibration tube that matches the 30# injectors, and an adjustable fuel pressure regulator. Quote Link to comment Share on other sites More sharing options...
heavy85 Posted February 3, 2009 Share Posted February 3, 2009 My '72 240 ran 12.55@118 MPH with a stock LS1 - guessing 350 crank hp so you should be right there at 120 MPH or better. This was with really crappy street tires and corresponding 2.1 sec 60'. Cameron Quote Link to comment Share on other sites More sharing options...
bjhines Posted February 3, 2009 Share Posted February 3, 2009 That is a testament to making the factory stuff work for you. I was impressed with the duty you got out of the old bottom end. Hopefully this new one will last even longer. Quote Link to comment Share on other sites More sharing options...
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