E55Greasemonkey

Sorry to start a new thread, searched but didn't find any with my exact mods.

Car is a 2004 E55, 98k miles (mostly hwy)
Kleemann Headers
2 1/2 aftermarket resonators, (stainless straight-through) stock exhaust from secondary cats back
Smaller supercharger pulley
EC box tune
PLM heat exchanger w/newest Bosch Pump

Drove the car to the dyno and went right on, hot today, humid, typical Florida... 89F 31% humidity

This was done at a Mustang performance shop, car in dyno mode but had trouble keeping the trans from kickdown, ran in 4th gear then tried 3rd, did a few pulls, not much time for cooldown as they got me in when they could after 5pm.

A/F looked good as far as what I know, lows 11's, logged IAT as best I could with Torque APP, hit 160F at one point in 4th gear, but later run in 3rd not so high.

They commented on how quiet the car was and couldn't believe it had headers, but they liked the sound, they said it's a Mercedes not a Mustang, that's how it should be. I added the resonators last week as my ears are sensitive to low frequencies.

Anyhow, Dynojet showed 449 HP and 476 TQ.

They told me their dyno tends to read low. I wish I had done a baseline/stock run a few months ago but I tried for weeks to get on 2 dyno's in town and just couldn't get it done.

Will be headed to the track in November and will see what she runs.

Forrest Gump 9

I've learn that dyno numbers are just for references. Track time is where it count. Plus, the weather is not ideal for you.

Toadster

my dynojet with s/c pulley and bigger HE resulted in 446/487

take it to the track

E55Greasemonkey

Toadster, have you even taken yours to the track?

Hulk

160* too hot bro, should have cooled down before making those pulls

E55Greasemonkey

Ya just wasn't able to schedule this any other time than right after work today. It only hit that on the first pull in 4th gear... we let it cool for 10 mins only, then 2nd and 3rd pull in 3rd gear got around 140 I think but had problems with the bluetooth OBD connection,so not sure, problems with the car downshifting, etc, not a perfect run today.

Hulk

Many on mustang dynos do the runs in 3rd gear
140* is high also with just a SC pulley, did you make sure that there is no air in the HE setup

chawkins2001

140* is not that high with a blower pulley and little cool down from the 4th gear pull, and ambient temps.

Those numbers are inline with your scenario. Given a clean 3rd gear pull on a cooler day with appropriate cool down, there is a much higher number in your setup.

Hulk

140* is high for just a sc pulley, try and do a proper cool down and put ice on the blower while it cools down and then report back

Toadster

no not yet

Htownbrother

100% agree with the above statement. Also, you used a mustang dyno. They read lower than dynojets and dynapacks. When I ran with my EVO buddies, one did some bolts on a e85 tune. On a dynojet he put down 400whp on the dot. He then went to the mustang dyno that the community used as a reference and put down 349 whp. Just something to keep in mind.

E55Greasemonkey

Thanks for all the input guys, It's a dynojet not a mustang as far as I know. Also, I didn't have a way to run the intercooler pump between runs, and they suggested to wire a switch to run it without the engine running next time, so we shut the engine off and let the fan blow over it, which in retrospect probably didn't help much, maybe letting the engine idle would have been better.. I will go back in a couple months when the weather cools.

Htownbrother

My fault, I assumed the mustang shop used a mustang dyno.....need to read better next time.

Hulk

Yes there a dyi here to hardwire the pump so it always runs with the key turned to position 1

E55Greasemonkey

I don't think I'm far off, I was expecting around 470hp and 500+ TQ, we will see when the weather cools off. Tonight I felt a cool wind coming in, so the beast shall be unleashed soon!! Just bought the car a few months ago, so haven't had the fun of driving it in the cooler air yet, but I know from my previous car how these superchargers love the cold air

cij911

Those are good numbers given back to back and may be more representative of what you would feel on the street (unless you just do one blast). What we all need is to keep the IATs really low and probably the best way is to get a 5 gallon tank and a killer chiller.

E55Greasemonkey

I haven't split the intercooler system yet, but I am working on it, will be using a 1.75 gallon tank (plus the additional volume from resevoir and hoses) mounted behind the rear bumper as I want/need to keep all my trunk space. Have all the parts just need the time. But you are right, this was more of a "real street" dyno than some of the numbers I have been looking at from other cars, where they are cooled down, ideal conditions, etc. I don't think I'll do the chiller since these cars don't have the greatest A/C systems, and in the middle of summer here, on max cool and recirc it just barely does the job in town.

GT-ER

I find this neither hot nor humid, come down here and you'll see what hot and humid is like. I rarely get dyno runs under 90*F and humidity under 50%.

That said, I'd look into your resonators. Just because they are straight through doesn't mean they are free flowing. Resonators tend to use turbulence for sound destruction which equals loss of flow.

cij911

Where exactly is the tank going ? Did you have the tank custom made ? I too would love something not in the trunk, so if this is an option I would definitely go for it as well.

E55Greasemonkey

Well the resonators made a nice difference in sound for me, I was getting out of the car with my ears hurting and it's better now, but still annoying to me...to the point where I was not wanting to drive the car...A little off topic but the trunk acts like a huge drum and the low end humming around town hurts my ears, I threw a furniture pad over the rear shelf and there is a significant difference since there are air ports into the trunk back there, I have already ordered some sound deadening materials to line the trunk and especially the empty spare tire well, it got so bad I considered selling the car if I couldn't make the noise go away.

My intercooler tank, although it may sound ghetto to some, is basically a 4" PVC tube with caps and fittings on each end which will tuck up under the rear bumper cover, if you look under there you'll see the space. Once I get the concept installed, tested, etc I will paint it and make it look nice. It could also be fabbed out of aluminum. One of my goals modding this car was to keep it looking, driving, and sounding stock, and not loosing any driveability.

Hulk

Yes I have seen something like the tank you are talking about, and seems to work

GT-ER

And you have stock mufflers? Do you have cats? You have sensitive ears, my car isn't loud enough..lol.

E55Greasemonkey

I have the factory secondary cats and all stock from there back. The resonators are right after the header downpipes

GT-ER

You have the primary cats removed but the secondarys, the second resonator and the H pipe in place? Dude, I don't even see how you can find you exhaust even remotely loud ( even without the aditional resonators. I strongly believe your problem is the exhaust. You can keep the piping and mufflers AFTER the oem resonator but the rest has got to go.

E55Greasemonkey

Here is a pic of my setup... Basically brought the sound level back to factory. Not really convinced there is a "problem" at this point, until I run at the track in a month, or get another dyno run with a proper cooldown between pulls and at least a blower unit pointed at the heat exchanger. Those first 2 pulls in 4th really heat soaked the car and no way or time to do a proper cooldown. Like chawkins said, I believe it too.