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Hello everyone! I recently bought a modded E55K and have been fixing it. There was a bunch of issues when I first bought it, and now they have mostly been sorted out, and the car is at a point where it runs smooth. I just had some questions about what other people have seen with the mods currently on this car. VRP speed that makes "600 hp" that is similar to my mods. I dynoed at 480whp and 530wtq on a dynojet at Eurocharged Houston after fixing the issues with the car and getting a custom tune from them. I asked them for a daily tune, driveable in all conditions 365 days a year. Are these numbers normal and healthy? Is there any more room for power without changing the fuel system (i.e. smaller pulley, or low ethanol mix like E30 or something else)?
Custom 1 7/8 Primary - 3" Collector Headers
UPD 77mm Clutched SC Pulley
UPD Belt Wrap Kit
Ported 82mm Throttle body
C63 Mufflers
Split Cooling System with Trunk Tank
G55 Crank pulley
Fuel Rail w 550cc Injectors
No idea if upgraded fuel pumps or not
Hello everyone! I recently bought a modded E55K and have been fixing it. There was a bunch of issues when I first bought it, and now they have mostly been sorted out, and the car is at a point where it runs smooth. I just had some questions about what other people have seen with the mods currently on this car. VRP speed that makes "600 hp" that is similar to my mods. I dynoed at 480whp and 530wtq on a dynojet at Eurocharged Houston after fixing the issues with the car and getting a custom tune from them. I asked them for a daily tune, driveable in all conditions 365 days a year. Are these numbers normal and healthy? Is there any more room for power without changing the fuel system (i.e. smaller pulley, or low ethanol mix like E30 or something else)?
Custom 1 7/8 Primary - 3" Collector Headers
UPD 77mm Clutched SC Pulley
UPD Belt Wrap Kit
Ported 82mm Throttle body
C63 Mufflers
Split Cooling System with Trunk Tank
G55 Crank pulley
Fuel Rail w 550cc Injectors
No idea if upgraded fuel pumps or not
What is a G55 crank pulley? Is that the stock size? If so your power figures sound about right for the 77mm upper
Custom 1 7/8 Primary - 3" Collector Headers
UPD 77mm Clutched SC Pulley
UPD Belt Wrap Kit
Ported 82mm Throttle body
C63 Mufflers
Split Cooling System with Trunk Tank
G55 Crank pulley
Fuel Rail w 550cc Injectors
No idea if upgraded fuel pumps or not
Is that a true 82mm throttlebody/snout combo or just an OEM one that has had the shaft grinded? Is there a tune on this car? Have you verified that the IC pump is working? Do you happen to have a dyno chart? The HP and TQ look a smidge on the low side for the mods. I suspect that you recently dynoed this in Houston and with this warmer weather and that 77mm pulley I suspect you're losing some power on the top end due to timing getting pulled.
Is that a true 82mm throttlebody/snout combo or just an OEM one that has had the shaft grinded? Is there a tune on this car? Have you verified that the IC pump is working? Do you happen to have a dyno chart? The HP and TQ look a smidge on the low side for the mods. I suspect that you recently dynoed this in Houston and with this warmer weather and that 77mm pulley I suspect you're losing some power on the top end due to timing getting pulled.
I am not sure on the Throttle body, this is the list he provided me when I bought the car. The previous tune was a tune from his "smart friend" and it didn't run great. I recently got a tune (February) from EC Houston and now it runs great. I have a dyno chart. Here you go. Multiple dyno pulls.
I am not sure on the Throttle body, this is the list he provided me when I bought the car. The previous tune was a tune from his "smart friend" and it didn't run great. I recently got a tune (February) from EC Houston and now it runs great. I have a dyno chart. Here you go. Multiple dyno pulls.
more details of what was wrong that you fixed may help. On a dyno jet those numbers are too low. My dyno was 463 on as jet. Common for the mods. I will be honest if you had a 72 mm pulley at meth you should be in the 10s. Your mods are strong. Take it to the track. Should run low to mid 11s. Your numbers don't indicate that. What custom tune did you get.? Do you know your a/f mix. Intake temps?
more details of what was wrong that you fixed may help. On a dyno jet those numbers are too low. My dyno was 463 on as jet. Common for the mods. I will be honest if you had a 72 mm pulley at meth you should be in the 10s. Your mods are strong. Take it to the track. Should run low to mid 11s. Your numbers don't indicate that. What custom tune did you get.? Do you know your a/f mix. Intake temps?
When I got the car in it's really bad state, I think around WOT the AFR was around 12-12.5 and the person at EC said that that was too lean for these cars, and they need more fuel. I think he said it should be in the 11s for AFR somewhere. I didn't get many details about my tune, I just kind of let them handle it because they were the pros. I haven't gotten a chance to look at the AFR Gauge I have while at WOT yet after tune because I'm focusing on the road when doing that, but I will try and find that out. Intake temps I am not sure. When we were doing the tune, the room that it was in was pretty cold and lots of airflow from the fans to throw that into the HE, Radiator and intake. I need to find a 1/4 Mile near me. I have an 1/8 mile near me but it's not the greatest place. Also keep in mind, at this point I was actively rebuilding the car, and the car had electric gremlins that prevented the car to go into dyno mode. They ended up just turning the ESC off and running it like that. I also think that because of the issues, they could've possibly made it an extremely safe tune, because I was rebuilding the car at that point, and it came in with issues, and I told them I wanted a daily drivable reliable tune in all conditions and climates. Not sure it affects power, but the trunk tank also only had normal coolant running through it, no ice.
What year is the car? If it was running that lean I would suggest a compression check. You would check each cylinder. Google it you can do it yourself. It will tell you the health of your compression. Running lean on a supercharged engine is disastrous. The number one cause of failure on the 113k. The engine can run fine with lower compression on a few cylinders but your peak will suffer.
What year is the car? If it was running that lean I would suggest a compression check. You would check each cylinder. Google it you can do it yourself. It will tell you the health of your compression. Running lean on a supercharged engine is disastrous. The number one cause of failure on the 113k. The engine can run fine with lower compression on a few cylinders but your peak will suffer.
That makes sense that I should do that considering this will be my DD in a couple months. I'll check that for sure before I fully switch over to it. It's also a late model '04 because it has the 580 Supercharger.
Customers Car dynod 505whp with basically the same setup with VRP 76mm pulley instead of a 77.
Was that also on a dynojet? And in your opinion with my current setup, is there any room to add more power without changing any parts on the fuel system?
Check out my build thread in the CLS55 forum. I've listed everything I've done to the car with supporting reasons and dyno charts. I'm currently making a fairly safe 537HP to the ground. I'm not sure on other folks thoughts but I'm really starting to feel that the 83mm pulley, long tube headers, and upgraded heat exchanger is a pretty reliable setup. The 77mm pulley seems to make good numbers down low but almost every dyno I've seen has a massive drop off in torque and power approaching 5500 rpm. With my build I focused on making as much non-boost related power as possible as to mitigate generating extra heat.
Customers Car dynod 505whp with basically the same setup with VRP 76mm pulley instead of a 77.
I was also thinking you should see 500+- whp. I hit 505 on a Dynojet @ EC Orlando.
Mods are:
EC box tune
Long tube headers w/race cats and stock exhaust
ASP 175mm crank pulley
82mm TB
Airbox spacers (homemade)
Split cooling
All else stock
Are you sure you have an 82mm TB and not a bored out stock 74mm? That is worth about 25 whp
And agreed that a slightly hurt motor will seemingly run good but produce lower HP
Last edited by E55Greasemonkey; 05-07-2020 at 12:45 PM.
You could have a boost leak. do you have torque pro to check boost pressure? Another customer has a pretty ridiculous setup and made **** power. Turns out it had a leak on the lower intake manifold gasket and was only making 13psi.
Check out my build thread in the CLS55 forum. I've listed everything I've done to the car with supporting reasons and dyno charts. I'm currently making a fairly safe 537HP to the ground. I'm not sure on other folks thoughts but I'm really starting to feel that the 83mm pulley, long tube headers, and upgraded heat exchanger is a pretty reliable setup. The 77mm pulley seems to make good numbers down low but almost every dyno I've seen has a massive drop off in torque and power approaching 5500 rpm. With my build I focused on making as much non-boost related power as possible as to mitigate generating extra heat.
I just read through your build, and holy damn there's a lot of information in it, thanks for that! I was looking at our dyno graphs and they look pretty similar in terms of the shapes of them, but you are making heaps more power than me. I need to go back at some point and do a pull now that the car is fixed and see if that might make a difference. There's a lot of variables at play, but I don't know if those variables can tell the story between your numbers and mine because of how far the numbers are. I'll go back at some point and ask them and see what they think.
Check out my build thread in the CLS55 forum. I've listed everything I've done to the car with supporting reasons and dyno charts. I'm currently making a fairly safe 537HP to the ground. I'm not sure on other folks thoughts but I'm really starting to feel that the 83mm pulley, long tube headers, and upgraded heat exchanger is a pretty reliable setup. The 77mm pulley seems to make good numbers down low but almost every dyno I've seen has a massive drop off in torque and power approaching 5500 rpm. With my build I focused on making as much non-boost related power as possible as to mitigate generating extra heat.
Just read through your thread also. Great write up.
Check out my build thread in the CLS55 forum. I've listed everything I've done to the car with supporting reasons and dyno charts. I'm currently making a fairly safe 537HP to the ground. I'm not sure on other folks thoughts but I'm really starting to feel that the 83mm pulley, long tube headers, and upgraded heat exchanger is a pretty reliable setup. The 77mm pulley seems to make good numbers down low but almost every dyno I've seen has a massive drop off in torque and power approaching 5500 rpm. With my build I focused on making as much non-boost related power as possible as to mitigate generating extra heat.
Could be valve float after 5,000rpm when the springs get weak from age.. Look at the thread "Beehive springs" and maybe that will help.
i always say that inlet can not get enough air through it and someone has reworked it and picked up a couple pounds of boost. when i had the lightning running 18lbs of boost the stock valve springs would blow open so i did behive's on the intake side only and power picked up.
I would check for boost leaks, then get her on the street and try do a pull from a dig to top of 3rd gear. Log that pull with timing, iats, air fuel , TP %, and boost. Report back with your data and it will tell you all you need to know. I would ice down the trunk tank with 30lbs before you log, so you get a constant low iat reading.
If something is off with your setup, it will show up in that data, and we can help identify it with you. If all is good, I would careless about dyno numbers and hit the 1/4 drags.
Could be valve float after 5,000rpm when the springs get weak from age.. Look at the thread "Beehive springs" and maybe that will help.
Interesting thread, do you know of any dyno charts out there that show a before and after the spring upgrade? I'd be curious to check that out. Out of most of the dynos I've seen posted of all sorts of mods, my stands out a little since it looks like it is pulling almost all the way to redline with a teeny tiny drop at the very end.
05-05-2020, 12:58 AM
