What's it take for this update? Mine is not accurate. I'm getting 16 - 18 mpg by paper, my ECU thinks it is 34 - 37
You will just need to ship the ECM to Bob. When I am out your way at the beginning of October, I can bring my cable and have Bob remote tune it also as an option. Just let me know what works best for you.
. And they are off a bit for everyone but especially for anyone running anything other than stock injectors.
We were actually able to crack this on our latest tunes. The latest supercharger and turbo kits from us have a correction in the hex code that keeps the mpg the same as the factory calibration, even with the larger injectors. It took a little bit of work in the hex to get it done, but super happy that we can report the correct fuel economy now. 
Display MoreHi all - just picked up a 16 with an Alpha turbo already installed. I've noticed a coupe of times that if I wind it out in 2nd and then hit 3rd too quickly, the engine will stumble as if it's hitting a super lean AFR. I'm absolutely terrified to run it hard at all at this point. It doesn't have gauges installed and I'm happy to install, but I'm new to turbos (NOS guy :)) so I'm not entirely sure how to proceed. So a few questions :
1. Is it possible to use ODB to spot lean mixtures?
2. If I do find it to be lean, what'st the next step? on NOS builds I've always upgraded fuel rail and injectors - can I tell if that has been done already?
3. Is there a way for me to be able to determine which EFI MAP is being run?
thanks much!
We have worked a bunch with the Alpha kits here and there a couple issues we see commonly with them.
- Check your Oxygen sensor, it is most likely between the turbo and the cylinder head in the header. If yours is like that, your oxygen sensor is probably starting to read incorrectly. The stock Oxygen sensor can not take that kind of heat and pressure and will start to read incorrectly, which will affect your air fuel ratios. The oxygen sensor can be picked up at most auto part stores for not much.
- Alpha shipped their kits with non-flow matched fuel injectors. Most of the time they seem to work, but we have worked with several Alpha turbo guys that have had issues and had their fuel injectors sent out to find that there was a difference of over 10% in some cases between the set. We have sent a bunch of sets out to Ausinjection to have them flow matched - https://www.ausinjection.com/
- The 2 Bar MAP sensor that Alpha sent with their kit has an issue that can allow the MAP sensor to work its way loose and even pop out of the manifold underboost. If the MAP sensor pops out under boost, the engine will not get enough fuel and engine damage can happen very quickly. This is the entire reason we have the MAP clips, shoot me a PM and we can get you one.
- Pull your spark plugs and check what the part number is. Alpha played around with a lot of different spark plugs over the years, but we have seen a lot of the plugs installed being absolutely the incorrect style of seat. The Ecotec uses a taper seat plug and we have seen a lot of gasket seal plugs installed by them. Get the right plugs installed or make sure you already do have them.
- Alpha has a very small exhaust turbine housing on their turbos to help with spool (.48 A/R). It produces quicker spool, but really starts to back up some heat and pressure as you up the boost.
Hope that helps, feel free to give us a call also if you have any other tech questions on that kit.
Dave
Dave@DDMWorks - receive that Pedalmax yet?
We did get it back and this unit does work. I will not be able to get back to testing this until early September though.
Display MoreI think, but Dave@DDMWorks would know better, I am getting around 300hp at the rear wheel.
Dave????
I also love the 100mm pulley. the power is addictive. I had noise so I took the belt off to start doing some investigation on where it was coming from and the sling was way, way to slow.
The 100mm pulley puts around 300hp at the wheels and there is more torque in the mid range also.
Quick update for those watching.
Talked with Teslasling a bunch and he did a great job of sending over quite a few pictures to help diagnose what happened. This turbo kit was installed by a dealer and at the same time a boost controller / air fuel gauge was installed. When the dealer hooked up the boost controller, they mixed up where the vacuum lines go and did not follow the installation instructions that came with the boost controller. This error prevented the wastegate on the turbo from functioning correctly, causing the overboost.
We are going to be talking with the dealer tomorrow, since they are closed today, to help get Teslasling taken care of though.
You can give us a call at 864-907-6004, which is our tech line and we will be happy to help. Talk with you soon
I installed my turbo kit almost 3 months ago now and have had the check engine lights on since day one. One is for the bike running rich and the other two are for the o2 sensor. One says it is for a open circuit. I have looked over everything and it seems like nothing is broken or disconnected. I have replaced the o2 twice with no change. Every time i take the o2 out it is black covered in carbon. I clean it off and put it back in the bike runs fine. then the next day right before it hits boost it sputters a little. The check engine light flutters when this happens. My afr levels are soot on though 14.3-14-7 on idle. Anyone have any ideas?
What air/fuel ratio are you seeing boosted?
When you clean the O2 sensor and put it back in, does the Slingshot run fine without codes until the next day? If you stay out of boost do the codes stay away?
Where in the exhaust is your O2 sensor located? Is it before or after the turbo?
How will you know it wasn’t “doctored?” one off the shelf would be better. Personally I wouldn’t trust any results good or bad knowing they now know what it’s going to be used for...if they read the forum or someone tipped Them...
The length of time it’s taking to get it makes me even more suspicious...
Just my thoughts...
The first one we purchased was through an Ebay seller and we had to follow the steps to return it since it was not working correctly. That return process takes a little bit of time, about a week, then we were out of town for about 5 days. Once the return went through, we ordered through JMS direct this time, however it was not ordered under "DDMWorks", but instead under an employee's name here. I guess what I am trying to say is that I doubt we will receive anything other than an off the shelf unit.
Dave@DDMWorks -- Any updates on this one?
The old one was returned and the new one is shipping direct to us from JMS this time.
ANy updates
The place we purchased it through is working on getting us another unit since this one arrived D.O.A.
It will be interesting to see if HP Tuners can crack the ECM open for tuning. The 2019 Corvette ZR1 takes 10 credits to unlock at $40/credit plus you have to pay to unlock the TCM in addition to that. And then you have to pay someone to tune it.
It should be interesting -
New 2020 Corvette was introduced last night
- Mid engine V8
- Starting price $60K
- 0-60 under 3 seconds
https://www.chevrolet.com/upco…/next-generation-corvette
Dave@DDMWorks do you recommend a certain header to be paired easily with the stage 1? I currently have stock cast and fab factory exhaust.. i was considering 1320 header or full blown race/ street header. Do you think ill have any issues?
The stock cast manifold works really well actually, the 1320 is another good option for the turbo setup. The Full Blown header has a very sharp bend at the end that would lead into the turbo and would not be recommended.
Hope that helps,
Dave
Hey kev , I like those doors. Kyle D , Dave@DDMWorks , or rabtech , do you think these would help with airflow for high speed runs?
It would depend a lot on what other modifications were made at the same time as to whether these would have any benefit. On Kyle D or rabtech Slingshots, I don't see them making much of a difference in overall coefficient of drag though. We did not test anything like this in the wind tunnel though, but have a general idea of what the air is doing there, so this is just an educated guess 
Dave@DDMWorks any word on when the stage 1 will be sent out? I place an order awhile back and was just curious?
All the final parts arrived today and we will be getting everything assembled and boxed. The first kits are shipping tomorrow! Super excited for all of these pre-orders and tracking numbers will start to show up in emails tomorrow! Thanks for your order!
Looking forward to your assessment Dave. Was the device something you purchased or was it gifted from a supplier/mfg.? Just curious.
We purchased the unit.
Just a quick update - We did get some base throttle to pedal position readings with a stock ECM, then did the install of the PedalMax, which was super easy to do. However, we are having an issue with our unit and looks like a replacement will need to be sent out. Then we should be able to get some good before and after tests complete.
I ordered mine but didnt realize it was internally wastegated. I would like to have nice sound and power. Im a little worried it will sound stock.
It definitely does not sound stock
