Paxton Coyote

[TW1NTRB0]

Took the car to have it tuned @ Pro Dyno. Paxton 2200 with 47# injectors, stock pulley. I put in FRPP 1 heat range colder plugs gapped to .032. The part number comes back as a Ford Focus plug which is .026 shorter than the stock 5Liter plugs. Not sure what is going on from 5100 - 5500 rpm, almost looks like spark blow out but it shouldn't be as it's only seeing 6 lbs of boost during that range. I'll pull the plugs over the weekend and double check the gap to see if one didn't get gapped properly. Other than the blower, injectors and plugs the car is bone stock from intake to oil pan and the exhaust is stock other than Roush axle backs. Using the stock air box with a K&N filter as well. I wasn't expected over 600 but was pleasantly surprised with the numbers. Drives like stock but pulls like a freight train. Graphs are STD and SAE numbers.

 

[KalEl370]

Your tuner should be able to fix that dip in the 5200rpm range, I had the same thing on the first pull and then my tuner fixed it on the next one. Here is the before and after dyno runs:

After

 

[Jinx]

If Dan of the only Pro-Dyno that i know of is tuning the car, make sure you get a professional second opinion on that by some of reputable tuners on this forum before you start swapping parts out due to his information. He could do a great job on your car, but his tune for my car was a nightmare in drivability. He tried to get me upgrade the injectors with my current setup with GT500 injectors (he had a set from a previous customers car that upgraded) with my 3.25 pulley. And everyone I spoke with said I shouldn't have to upgrade injectors with my run of the mill setup and shouldn't be running out of fuel above 5k rpms like Dan said I was doing. So after back and forward phone calls and a different theories (besides a horrible tune) from him. I just went with my FRPP tune. I will say at least he got me a good peak numbers, but it doesn't mean crap if its a pain to drive. If I had to do it again, I would have went to Amazon or Fastlane since I'm a Carolina local.

 

[TW1NTRB0]

The tune is fine and the car drive great. I have no issues with Dan's tune. The car is not out of injector and the dip is not the same as the other graph posted. We tried to get it out in the tune but it never changed between pulls. It's something you can feel when it happens and I have a feeling it's the plugs. Dan never tried to get me to upgrade anything, I even had 72# injectors with me just in case. Dan is one of the top tuners in the country by far and has over 5000 custom tuned cars to back that up.

On another note I'd rather have my 6 year old niece tune my car rather than Caleb at Fastlane. I've had one of his tunes and I can tell you first hand he can't tune for shit. The problem with Amazon is they never answer the phone and it's like pulling teeth getting a call back. Doesn't exactly instill confidence in my mind if I have an issue with the tune.

The only other shop that would ever touch my car would be JPC racing but they are just too far away.

 

[stang910]

Congrats, these cars are alot of fun with the Paxton. Glad your happy with the tune, but personally I'd be disappointed. Your missing out on ALOT of torque below 5000rpm, which is what makes the car a fun DD.

 

[Jinx]

The tune is fine and the car drive great. I have no issues with Dan's tune. The car is not out of injector and the dip is not the same as the other graph posted. We tried to get it out in the tune but it never changed between pulls. It's something you can feel when it happens and I have a feeling it's the plugs. Dan never tried to get me to upgrade anything, I even had 72# injectors with me just in case. Dan is one of the top tuners in the country by far and has over 5000 custom tuned cars to back that up.

On another note I'd rather have my 6 year old niece tune my car rather than Caleb at Fastlane. I've had one of his tunes and I can tell you first hand he can't tune for shit. The problem with Amazon is they never answer the phone and it's like pulling teeth getting a call back. Doesn't exactly instill confidence in my mind if I have an issue with the tune.

The only other shop that would ever touch my car would be JPC racing but they are just too far away.

I'm just saying my car drove like shit under loads up grades (like a on ramp to the interstate). I haven't used anyone else's tuning and just installed my FRPP tune back on the car after constant riff raff. Lost a few hp and tq; but it drives like it is suppose to. So like I said, whether it be plugs or injectors or whatever, just protect yourself from having to keep making trips back and forward to anyone.

I hope you resolve your issue. If you are sure its the plugs, go for a new set for a brand and model that most use on here. If they work, they work, if not.....then you have two sets of plugs in your inventory and I'm sure everyone FI on here will agree you gonna need a new set sometime.

If that doesn't work, I would still like to see you have a third party look over the tune; but if you are dead set.......troubleshoot coilpacks (however I seriously doubt that is remotely a issue). Like Kal said that should be fixed with a tune revision.

Dan is great for inspiring confidence and great customer service while your car is in his hands. However, left much to be desired for buttoning up loose ends. I like to see him fix it. If he can solve your issue, it could inspire more confidence for me with him for future work.

On a different note, I still think it's amazing what a 5.0 can do with FI. Near 500 rwhp in twin screw is fun on the street, but I think if I had a 5.0 I would probably chose your setup or Lund's turbo setup as a fun street. Congrats on a nice car and good luck.

 

[Juiced 66]

I did the same thing.. Had a local tuner tune my car. Peak number were great, 760 hp but it was a little lean up top and drivability wasn't that great. Plus it was running out of mass air by 6500 rpm. I had him retard the timing to back the power down to 720 just to ease my mind. After he couldn't get it right, I data logged it and I spoke with beefcake and sent him some logs and I'm going to put the stock pulley back on and let Lund tune the car. I think the car will make plenty of power with the stock pulley and Lund can put the timing back in the car so that it makes more power/torque down low. Better safe than sorry I guess. Hell it was making 12-13 psi at 6500 or so so by backing the pulley back it'll prob make damn near the same once I can spin it to 7000+

 

[TW1NTRB0]

I did email Dan to take a second look after double checking the plug gaps. The plugs are the Ford Racing M-12405-M50. When I put these plugs in I noticed that they were much shorter than the stock plugs I removed. After checking the part number on the plug it comes back as a Ford Focus plug. Dan had a set of the same M-12405-M50 plugs and they are the same exact ones I put in the car so all should be good there. Looking at pictures on the internet (which I know aren't always accurate) 99% of the sites show a similar plug but with a short thread length. The plugs I put in are threaded all the way up. American muscle shows the difference on their site as they have both pictures posted. My guess is Ford is selling 2 different plugs under the same part number like they did with the 3V0 plugs on the 3V cars.

If I can rule out the plugs my next guess is a boost leak. The 3/16" vacuum hose that runs from the bypass valve to the brake booster was much too small to install on either end so I went to the parts store and purchased 1/4" line but never zip tied it down. I figured vacuum would keep it tight on both ends. Dan did mention I should zip tie it to prevent a boost leak in the future. Is that possible since in the first graph it looks like boost is wavy? Not too familiar with it since I'm a nitrous guy, always have been.

I'd also like to add that the car drives great. The idle is real good, low speed drivability is really good as well. I don't have any issue with the car feeling flat at all to be honest. I will say though that it's hard to tell the small differences because the car is such a handful. Not exaggerating at all 1st, 2nd, 3rd and part of 4th gear are completely useless with 3.73's. The streets are cold and the stock Pirellis have no chance to obtain any grip. The power is almost ridiculous and the pull is insane from 1st through 5th.

One thing I did notice from searching and comparing other graphs with either the exact same or similar mods as mine is my torque is down by 25 - 40 ftlbs below 5000 rpm. The A/F is near perfect so the car seems safe. Maybe the torque output down low is just the difference between different tuners. Not sure but to be honest that's the least of my concerns since traction is at such a premium right now. I am concerned about the 2 dips though and really not sure what it could be other than spark blow-out, boost leak or knock retard.

 

[Juiced 66]

I feel ya on the traction issue.. I've got 3.73's also, and am backing it down to 3.31's. I spin through 4th gear, it's just way too much gear at this power level for a street car.

 

[Seer]

I feel ya on the traction issue.. I've got 3.73's also, and am backing it down to 3.31's. I spin through 4th gear, it's just way too much gear at this power level for a street car.

I'm actually looking at going from 3.55's to 3.90s with my whipple 2.9 car with 750rw

 

[TW1NTRB0]

I feel ya on the traction issue.. I've got 3.73's also, and am backing it down to 3.31's. I spin through 4th gear, it's just way too much gear at this power level for a street car.

I agree, I think 3.31's are in this cars future. I really don't want to put a radial on this car like my others so I'm going to try the Nitto Invos on the rear to see if it helps but I may make the switch to 3.31's.

Just an update, I took the car out this morning and put it in 4th gear at around 35 mph and floored it so it wouldn't spin as much to get a better feel as to what is going on. The entire way from 3000 until I let out at a little over 6000 the car just surged like an on/off switch through the entire rev range at WOT. It's slight and keeps making power but now I can definitely tell something is not right. Just felt like a very fast on and off feeling and it didn't feel like boost was going completely away but you could definitely tell it was dropping boost for a split second over and over which coincides with the wavy boost graph. Any opinions? Is that a tell tell sign of something?

 

[Juiced 66]

I'm actually looking at going from 3.55's to 3.90s with my whipple 2.9 car with 750rw

I like your style sir!!!!!

My main reason for swapping would just be because I like to drive around on radials most of the time, and my track tires are on race stars and I don't like driving on front runners for long distances.

 

[Bad Intention]

I was having spark blow out issues with my car. I was using ford plugs that came with my Aluminator. Went back to NGK 1 step colder (6510) and problem solved.

 

[Seer]

I like your style sir!!!!!

My main reason for swapping would just be because I like to drive around on radials most of the time, and my track tires are on race stars and I don't like driving on front runners for long distances.

305/35/20 shitto drag radials here.

I use a different setup for the track though.

 

[TW1NTRB0]

I was having spark blow out issues with my car. I was using ford plugs that came with my Aluminator. Went back to NGK 1 step colder (6510) and problem solved.

I think I'm going to try a set of those NGK's you listed just to have a piece of mind. I use NGK on my TAG race kart and I've had good luck with them, worth a shot at least.

 

[linnE]

The problem with Amazon is they never answer the phone and it's like pulling teeth getting a call back. Doesn't exactly instill confidence in my mind if I have an issue with the tune.

Surprized to see this.We are extremely busy but the only time the phone is not answered is if I am not at my desk or out of the shop for lunch. We also keep extensive phone logs with our messages to do calls backs so that we can return them in a timely manner.

We were having extensive phone service issues during the summer when we made the move to NC. If you were trying to reach us during that time I'm sure we missed many calls because of the issues. We had to have our # changed 2 times during that period. Many didn't even realise that they were trying to contact the wrong #.

 

[TW1NTRB0]

Surprized to see this.We are extremely busy but the only time the phone is not answered is if I am not at my desk or out of the shop for lunch. We also keep extensive phone logs with our messages to do calls backs so that we can return them in a timely manner.

We were having extensive phone service issues during the summer when we made the move to NC. If you were trying to reach us during that time I'm sure we missed many calls because of the issues. We had to have our # changed 2 times during that period. Many didn't even realise that they were trying to contact the wrong #.

No problem, wasn't aware you guys had any phone issues. I'm going to continue to try to work this issue out with my tuner for now and if we can't resolve it maybe I'll give Rick a call to see what we can come up with, thanks.

 

[8306gt]

I agree, I think 3.31's are in this cars future. I really don't want to put a radial on this car like my others so I'm going to try the Nitto Invos on the rear to see if it helps but I may make the switch to 3.31's.

I like your style sir!!!!!

My main reason for swapping would just be because I like to drive around on radials most of the time, and my track tires are on race stars and I don't like driving on front runners for long distances.

While I agree with you guys preference to drive around on a regular radial tire, I just don't believe your going to find a tire that will work very well with 600 to 700 rwhp, and swapping gears is only going to change the mph that it spins those radials.

 

[Juiced 66]

While I agree with you guys preference to drive around on a regular radial tire, I just don't believe your going to find a tire that will work very well with 600 to 700 rwhp, and swapping gears is only going to change the mph that it spins those radials.

You are correct, I just think a 3.31 will be more "user friendly" on the street. Even on slicks when my car is hooking I have to be on top of my game in 1st-3rd because the car wraps out really fast. I prefer a gear that puts me through the traps at redline in 4th gear, but damn.. I'm trying to keep this thing a street car. I always buy cars and they end up with a damn cage and gutted in no time. I can't leave anything alone LOL!!

 

[Kenaizer]

Haha there are worse problems to have. I'm toying with the idea of getting a cage.