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Last weekend I made the trip from Columbia, SC to JHRPerformance in Moorseville, NC to get adyno tune from Anthony Lawshee. It waswell worth it. My car is a pretty simplecombination. I have a 2003 E55 with 62Kmiles, 77mm clutched pulley, belt wrap kit, drop in K&N filters, project B5 long tubeswith no cats with the rest of the exhaust stock, PLM heat exchanger, and aBosch pump.
The dyno graph is attached 482 HP 553 TQ.
One of my main reasons for going was to see the AF ratio doto the exhaust smell. The smell wasdefinitely better after the tune but still noticeable. I had a EC box tune previously and was ableto gain quite a bit. I don’t want toignite some type of tuner debate with this post and I will say I was very happywith the customer service and quality of the products I have from both companies.
I saw the post a couple days ago about the Project B5headers fit/quality, I purchased mine when Shardul had the group buy going afew months ago. If you're fine with nocats and some smell then they are great for the price. My only complaint is how difficult itwill/would be to add cats. The B5's havethe bracket that mounts to the transmission near the end of the collector onthe long tubes, most other long tubes I've seen stop quite a bit furtherforward on the car. To add cats would require quite a bit ofcutting and welding and would probably make it difficult to keep the built inflex pipe which is part of what I initially liked about that system. I'll post a picture of another person'sexhaust which for me would be the ideal setup, very clean and with cats (I tookpictures of his because I'm probably going to try and simulate somethingsimilar). Like a fool I did not takepictures of my own exhaust, but I will try and get some to post later.
I always see questions about “how much power will I get withthis mod?” If you have cooling mods,77mm pulley and long tubes you should be somewhere in the vicinity of mycar.
JHR was a really nice/clean shop and I wanted to thank Bob,Wes, and Anthony for their help with my car!
Would be difficult to keep stock 2ndary cats/piping with these headers?
Sorry for the typos in the first post, I typed it in word and pasted it to the forum. It looked fine until I hit insert.
If you look at the picture you'll see the two brackets that mount to the transmission. The B5 headers end where those brackets are. I guess you could use them, and might still be able to keep the flex pipe. I may try that, thanks for making me take a closer look! I was thinking about the secondary O2 sensors behind the first cat.
Last edited by E55SC; 03-28-2017 at 07:55 AM.
Reason: Incorrect
I made your numbers with shorties and a 77.
Cooling was a PLM HE, 010 IC pump.
480/530 is what I made.
I am now running Mid lengths with the 77 and same cooling plus a VRP secondary HE, and split cooling with the BMW reservoir.
530/550 is what I make now.
480 seems quite low to be honest. I know multiple people with smaller headers than you making that same power range.
+50 RWHP from shorty to mid-length? That's a massive gap, suggests cooling mods made a significant difference. I thought stock to long tubes was worth about +40-50 RWHP.
yes I was heat soaking pretty bad with the shorties and cooling I had.
Splitting the cooling and adding a secondary HE did wonders but. The bmw res isn't the best way to do it but it definitely helped paired with the additional HE.
My temps previously were 25-30 over ambient.
Now they are 12-14 over ambient.
I also have a custom dyno tune which Is commended on our car due to the open loop fuel system.
I also have a custom dyno tune which Is commended on our car due to the open loop fuel system.
Open Loop / Closed loop are typical terms defining what maps are run by the ECU for fueling of the motor
Open Loop runs off the O2's giving feed back for fueling needs in light load / cruising.
Closed loop is termed due to it being a hard map where O2 feedback would not scale quick enough and would chance running the motor lean; so a hard value is entered usually via RPM/Load on XY axis and the value equalling millisecond of injector opening time combined with an injector constant for what size injector you are running (this is in a different line in the binary on other ECU binaries I have messed with)
Are you referring to the fact that our cars run on a returnless fuel system when you say "open loop"?
Also what were the ambiant temps when your dyno runs were logged showing your gains?
I am assuming you were on a box tune, then got the dyno tune to reflect those gains?
Love the torque and area under the curve on these cars (even stock). Makes them a blast to drive on public roads and at not go-immediately-to-jail speeds. Have a car with a 6.2L naturally aspirated Chevy small block (415 hp and 415 lb-ft) and to really enjoy the car, you have to wind it out a bit.
03-27-2017, 05:58 PM
