im looking into uprgrading the turbo on my car i was looking around to see what the best turbo upgrade i can get for our cars and where to get them thanks

 

We need a fueling fix before a big turbo is worthwhile IMHO. Dejon has kits and BTF has a kit.

 

And Hahn will have kits I'm sure. And even ZZP might....

 

synaspse has a kit

 

one of these days someone will listen hahaha

 

Hopefully. I wont hold my breath though.

 

ummmm do u understand the logic behind the fueling issue??? the technology isn't there. our injectors have a pressure of 200bar. only way to get better is to go with efficient dynamics technology from BMW.

 

Max pressure is 2100 psi approx 180 bar stock. Once, if, HP Tuners unlocks the fuel pressure tables we could command close to 3000 psi which would give us 20% more fuel in the same injection duration. 20% more fuel means 20% more max power so close to 500 whp on stock injectors with a larger turbo.

 

hate to say it bud... but why do you think HPT hasnt unlocked it yet? its impossible(well nothing is impossible) but the technology is not there yet. in order to get it to close at 3000psi require more voltage than our cars supply look up fuel efficient dynamics by BMW and read up.. then ull understand what im trying to get across.

 

It is not impossible to increase according to one of the engineers who works for GM. He discussed this on another forum. One of the tuners on here has an ecm that has higher than stock fuel pressure setting but HP Tuners cannot read those tables but it can be and has been loaded into a car with some impressive results.

 

im just gonna shut my mouth

 

im new to this stuff so sorry for the newbness, does this mean if we upgrade the turbo our engines would be running lean due to the lack of fuel?

 

No...you don't run into issues till around the 380-400WHP mark, it's also RPM related, bigger turbos spool later and benefit from being able to run longer in the RPM range...past the 7000PRM mark. Getting the fuel needed past 7000RPM is the problem.

Synapse's kit makes near 380WHP and 380WTQ with their tune on the stock fuel system and they don't rev over 6500RPM. Dejon's kit is somewhere around the same numbers. You aren't gonna go much further than that though.

Considering a fully bolted and well tuned LNF on the STOCK turbo is gonna be in the 320-340WHP and 330-360WTQ range...the cost of the turbo kits just aren't worth the performance IMO. Not until we can see consistent 400WHP/WTQ+ powah.

 

x2 ^^

turbo kits are not worth it untill fuel can be addressed.

Why arent venders helping us?

I cant get a turbo solution
I cant get a Rim soultion
Nothin lol

 

If I were you, I would suggest the K04+, which has a bigger compressor wheel. You be getting up into the 340-350range with no worries of your Turbo loosing its breath. I'm getting this and until fuel issues are address then I'll go ahead and get something bigger.

 

i might just get bigger K04

 

have they solved the serging problem with the Ko4+ yet and plus i still dont think its worth it

 

I think a full bolt on SS/TC with a nice tune will put down 320-330whp and 350-360wtq on the stock turbo. With that power on some slicks or really good DR's, it would be very possible to get into the 11's and that is with the stock turbo, which I think is great. Then all we need is the fuel problem fixed and a bigger turbo and 10's are easily within reach. I think we just need to give the engine time.

 

I personally called Borg Warner and found out that the slightly bigger K04 would not work unless you made a custom adaptor for them, not to mention they are not twin scroll. Good Luck, but I did that already. Hence why I ended up getting the K04+ which is what BORG WARNER themselves recommended me to. They gave me 2 sources "Precision Turbo" and "BTF racing".

 

These cars are 3000 lbs... Neon srt4's need over 380whp to run in the high 11.7-11.9 in the 1\4 area... the Cobalt SS\TC is no different except it's DI fuel system........ The wheel up grade will get get you as stated back a page, 330-340 whp... On slicks that's good for maybe 12.4's at 115-116 mph.......

AS for fuel, One of the things I've noticed people forgetting to address is the fuel pump... Anytime you take a car and pump up the hp by 70-90 whp you will need a fuel pump upgrade so you dont get fuel starvation.... a walbro 190 or 255 unit will work just fine and take some of the pressure\work load and maxing out the cycle out of the injectors so the car can run a safe 380-415 whp....... without pushing the Fuel to it's limits.....

We do this on big V8's and small 4 bangers are no different......

That's an impressive tune\hp numbers... Did trifecta come out and tune your car? No way you can get a mail order tune that good, just no way.....

The wheel upgrade from BTF ( the only company offering this) is a great idea but I'm hearing that they're saending people back a regular K04 single scroll, ours is a twin scroll..... Single scroll will cause mucho problems....

 

I very highly doubt that unless it was a honest mistake. All the corresponding I have done with BTF, he seems like a very straightforward guy, and he knows his stuff. He is not going to screw someone over like that.

Do you have any proof of this?

 

I have gone from tune to tune. I first went with a PPC from Hahn, "COOL" then i did Pychostevo "WOW", now I went with Trifecta Performance and well my clutch was screaming for help(replaced w/Spec 3+) and as for commenting on this tune, I said "OMG". I could tell the difference each time. Trifecta didn't come out to tune my car, they data log when your car recieves the tune and make adjustments according to what mods you have and how well everything is running. So.... yes canned tune with some custom tunning. Lets see what the K04+ does. Also, bro I have seen in other threads you always being negative and kinda bitter. I'm just curious why? I know you were having problems with your TC with linkage or something like that before, if I remember right.

 

From what I have seen the only cars that have had surging issues were the sky's and solstice. If anything the only thing needed said by BTF to get rid of the surge would be a down pipe.

 

Why don't you just run a big turbo on less boost and believe me Im hoping my tuner will have the fuel problem fixed soon

 

you will be slower. lag will slow you down. nice numbers by the way!