Fueling…Not that I know anything about this particular platform, but if it’s like most DI setups it can hold it’s own under added power.
I’d personally like to know who makes the actual HP pump on the motor, and whether it’s a straight mechanical or an electro-mechanical setup. Common Modyne stuff used on newer diesels is electro-mech and has all sorts of varying sensors on them(although they are the throttle on those engines as well) Problematic at best in most cases :sad
DI and MFI are the shit though, so much potential in these new setups. I build and tune quite a few MFI(mechanical fuel injected) Porsche setups and they just scream for more power and are pretty easy to tune at that, and these are systems from 30+ years ago. Hard to find parts for these days though.
the first car is a stage 2 supercharged ss(GM claims 240hp) it put down 203ft lbs and 227whp, where as the ss/t put down 237whp and 258 ft lbs.
as you can see on the first TC pull in the graph below the tc made 230whp. The reason for this is because we had made pulls yesterday without the exhaust on, and the ecu was relearning with the exhaust reinstalled. this ecu is very adaptive. for example when we unplugged the ecu and put it back in after checking the serial numbers we made some pulls on the dyno and the car barely made 200whp on the first pull. and consistantly made more power each pull after that.
yes of course, i was just giving people that might not know what the stage 2 kit is an idea of where the car stands relative to GM’s specs. wasnt trying to say GM overrated it.
also about the fuel pump for adam i’ll talk to our master tech today about it, i want to say it’s mechanical and you can tell cause it makes an annoying ticking noise at idle that we’ve actually had some people return there skys due to the tick
nvm on the tune guys i’m buying the software as well next week, but i would like to dyno aginst that car once done as i consider my cars mods to be the same as 80%~ of what other LSJ’s have done and i would like to see how it looks then,
FYI stage 2 stock is a joke, with just a 2.8 pully upgrade and solid motor mounts people can cut about .6 off there 1/4 time and gain about 25hp
Yup, but what I’d like to know is if that mechanical pump is straight mechanical(like a Porsche MFI) or if it’s an electro-mechanical unit like the Modyne or Standyne units. EM being that it has various optical eye’s and “TPS” type sensors on it.
I have been working on an FSI like system for older Porsche motors(next gen cars supposed to be factory equipped :bowdown) and have been on the hunt for a pump that will work. Standyne and Modyne pumps are too complicated(electronically) to make work on such a setup, and are on constant nationwide backorder as well so even dumbed-up cores are hard to source. Solenoids are not an issue if it does have them but the rest of the sensors makes the system difficult to work with.
If you tear into that car that far let me know what you find. Definitely an interesting setup there…
The injection system on this car is extremely similar to a VAG FSI motor. If i where to guess id say the pump was made by Hitachi like the VW is. Almost everything else management wise (ecu included) has Bosch markings all over it. These engines are direct injected meaning the fuel injector nozzle sprays directly into the combustion chamber. To overcome the high cylinder pressure as well as keep the injection window very short very high pressures are required. To obtain these pressures the fuel is a mechanical piston design that is driven off and additional lobe on the camshaft. The fact that the fuel is pressurized by a piston is about the only similarity this setup has to MFI. Drawing comparisons between the two is silly. The pump pressurizes a common fuel rail and the injectors are controlled electrically.
GM and Audi share alot Bosh electronics. My TA has almost an identical ABS module as Nicks S4.
2 stroke outboard boat engines have been playing with direct injection for years to try and overcome Cali emissions. Many went to 4 stroke now but Johnson/Evinrude have got it right
This direct injection thing is not new by any means. Diesel engines have been doing this since Dinosaurs turned into oil
that is a completely top secret project busa motor turbo… haha j/k we do some work for our buddies dealership cars every once in a while, mostly hondas. its actually pretty clean beleive it or not lol, not my style though.
