Im having problems with the ecu/fuel/ and boost control ,
the car is running pretty rich ..
current engine mods :
*Garrett T04B dual ball bearing turbos
*B&B headers
*Techart exhaust ( racing )
*Gt3 engine heads
*Factory Titanium Rods
*Stock wastegates ( upgraded springs)
*Scargo carbon fiber intake
*K&N air filter
*V.2 Giac Tuning ( evo stage 4gt ) software
*improved Torque converted ( yes my car is a tiptonic )
Problems :
*the wastegates throw away most of the boost
*the hose going to the intercoolers keeps falling of
*ecu was tuned for 92 octane and overhere the worst u can get is 98 .
am I able to install different wastegates ? like 46mm ones ?
if not .. what external wastegate controler options do i have ?
anyone set up a different boost guage ? I wanted to know the real boost im getting , stock guage says 1.9-2.0 but i know im no where near that .. we dont have a dyno close by , so i couldnt really find the correct Hps im getting .. but on a 1/4 mile run i got a 11.0 flat at 131.. im really looking to improve that time
is there anyway of getting an ecu reading ?
any help or ideas would really be welcomed ..
thanks in advance

 

Who in the heck did your work?

1) The B&B headers are not a good match to the rest of your product.

2) What is the backpressure immediately prior to your kats?

3) Which GT3 heads are your using and what did you do about the exhaust cams?

4) A canned ECU will never do what you want for those mods.

5) The boost is being thrown away because you are exceeding 1.3 bar and the ECU has not been adjusted. The most bar you can be making after the T.B. is 1.1 bar once you have exceed the 1.3 the first time without resetting. Yes, you will see high boost numbers before the TB after it has closed.

6) The hose is not falling off, it is being blown off. Need silicon hoses and heavy duty clamps. In some areas you need to get rid of the hose and hardpipe.

7) The only way you will really know what you are getting boost wise is to hook up a gauge before and after the throttle body.

8) If you intend to run at elevated boost pressures you need to install larger injectors. If you were really running a true 1.4+ bar with the set up you are talking about I'm afraid you would have leaned out to the point of engine self destruct.

How are you making use of the GT3 heads without enlarging the intercoolers, Y body intake, throttle body and splitter? You really have a restriction here. Something is not making sense.

 

Couple of things here....They all stem from the same issue. Too much boost. You can not run that high of boost based on the system you have. You can run mid 1.5s but not near 2.0. The car will become unhappy and kill the throttle body, open the wastegates and not allow the system to make more than .5 bar. you need to set the wastegates to come off their seat at apx .38 and adjust from there. The controller is more than adequate enough to control the system. The pressure pipes if stock should be changed, if they are then the existing boost is most definitely causing the system to blow everything. I would also be willing to bet that the code you are getting is a Variocam code or a misfire code. This is the only way the system can protect itself. My suggestion is bring the boost settings down and these issues will clear up. No reason for different wastegates, EBC, gas or other. This is an overboost issue.

 

The heads are Gt3 cup with 5mm larger valves , yes we had to change the exhaust cams .. havent changed the factory fuel injectors . but got a ceramic coated Y-pipe .as for the intercoolers currently using stock gt2 intercoolers which are only about 10% larger . what do you mean a canned ecu ? what headers should i go with ? the only mod im working on is getting a set of Carrillo rods .. they said i had to send them a sample so i might send them a titanium rod , it would take about 6weeks and $319.00 per rod . upgrading the engine to a 3.8 with 102 mm 9.5:1 for more compretion . who did the tuning for your ecu chad ? what external wastegate contoller should i get ?boostsciences is the only company i know ... thanx again

 

I do not believe the stock "Y" pipe will work. The reason is the rubber hoses are a weak link for high boost. Hard piping with a small silicon joint from the throttle body to the intercoolers is the best way to go. You will have to use larger injectors as you raise your boost. RC Engineering makes a 72 pound injector to replace your stock 55. You need more fuel to make more power. Over driving your stock injectors is risky. It can lead to a failed injector and a lean cylinder. By canned, I am refering to an ECU designed to go with specific components. You need a custom ECU. Todd at Protomotive did my custom unit. I would go with the S Car Go 1-3/4" tube size short tube headers. Why are you changing the rods? The Carrillo's are stronger but don't rev as high. What hp range are you shooting for? Whose 102 mm pistons and sleeves are you using? My second motor has Wossner 102 mm sleeves and liners. I dropped the compression ratio on the Wossner pistons to 9.0-1 because I was raising the boost. I do not know what external boost controller S Car Go used. I will find out tomorrow and let you know. My boost controller is not a problem. If you are going to make the power indicated by your parts you will definitely need a larger throttle body than the stock 66 mm unit. This will also require a larger Y and splitter. Your GT3 Cup heads, are they the new ones (2003) or the old ones (2002 and earlier). What springs are you using. Did you knife edge your crank? What oil pump are you using?

Your motor sounds very close parts wise to my second motor.

I would definitely give Rob King at S Car Go Racing a call. He could help you sort the problems out. We have already experienced what you are going through.

 

Additionally to what you are having problems with I do recommend turning the boost down and seeing where the car is at. Depending on the HP you are looking for and where you are at, doing so will give a clearer picture. It would not be my recommendation to start throwing parts at it. I would back the boost down, take a look at the HP/AFRs/EGTs and go from there. Who ever was your GIAC tuner with the upper package should be able to provide support for custom programming as well.. Even though you have GT programming the car still will control its functions based on the environment. I will start small and work out the kinks as you go along.

There much better controllers out there than the boostsciences. HKS V, Blitz SBCi, Apexi AVC-R to name a few. The Profec B is not one to consider. Keep in mind the issue is not the controller here. It is a setting. Granted the issue of the Y pipe and throttle body may come into play, however it depends on your HP goals and drivability ranges.

The last thing to keep in mind is the Tip. Good for you at going at the tip with big HP. One thing you will want to do is add a bigger cooler to the unit and possibly a ATF cooler as well. No matter what you add in HP if the tranny sees temps on the coolant side of 212 F or ATF of 194 F the system will start to try to cool them by switching it through the cooler. If it sees ATF temps of 289 F then the CM will pull power from the DME and reduce functions in the motor.

Keep that tranny cool and the additional 110 Lbs from the tip will be nothing

 

Huh? the worst you can get is 98? You mean 98 RON, correct? which is ~94 PON in the US. Make sure we are comparing apples to apples here.

 

Ack ! you guys make this sound really hard heh , I will talk to Rob king (scargo) about the headers and Y-pipe , already spoke with todd@protpmotive for a custom ecu , RC Engineering dont have the 72 pound injector last time i spoke to them , they said something like 60 days wait . as for the pistons and cylinders im going with FVD , do you think i could go with 103.6 mm 13.2:1 , and make it a 3.9 engine ? as for the pumps im using stock fuel pumps , i was told that they are good for 800hps . for the boost controller il go with apexi .. will try another run with Bfgoodrich g-force drag radials .. thanx alot for the advice , will post again with new setup in about 2 weeks