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#2276 - 01/09/08 01:35 PM West Coast Corvettes  
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I have seen bad dealings in the past from other Corvette owners from this vendor.

All the years they have been selling high priced performance parts you'd think they at least knew the basics or engines and superchargers by now

Owner has a 2007 coupe with A6 paddle shifter.

Stock engine with headers.

WCC convinces owner to buy a ATI KIT from them that is supposed to come with all parts needed.

Owner asks about need for larger fuel injectors and is told by WCC that the stock 32 lb injectors would be fine nono

Instead they sock him for more money on a Boost A pump which is nothing more then a box that increases the voltage to the fuel pump to make it work harder.

Here is the first pass tune we did results.

As seen with this street testrun with a Ease OBD scanner in record mode - weather was about 45 degrees.

Again keep in mind the engine is stock

Shop owner did the testrun to 126 MPH and max of 6,600 RPMs.

Produced for that run 678 flywheel HP with 551 ft/lbs torque.

You notice the tip off :

Engine knock for that run eat 452 degees of timing, each knock at upper engine loads with boost was between 5 and 10 degrees which then forced PCM to command less WOT timing to only 13 degrees.

Injectors ON time ( pulse width) normal for part throttle is 3 mSecs.

In this testrun max ON time was 21 mSecs with a maxiumn injector duty cycle of 114% puke

This is with the boost a pump functional.

An injector can only flow what it can as to its stated design, boosting the fuel pump voltage from 14 to 17 volts does not solve the problem, instead increases current and heat to pump, causes injectors to be on too long and also having more of a current load.
In sort a BAP is nothing but a workaround that will not protect a stock LS2 with 6 lbs of boost.

For the prices this WCC vendor charges for this ATI supercharger kit they should have at least the balls to include the proper injectors for as results show the average power enrichment engine loads required a 40 lb injector and maximun needed was 51 lb/hr injectors.

Clearly a stock 32 lb injector is not going to support 700 flywheel HP and anyone with basic knowledge knows that.

If unchecked this owner would not have known what was hidding in that stock engine and assured over time of that engine blowing up due to how lean it would run in summer heat.


Attached Files ATI-CS1.jpg

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#2277 - 01/09/08 02:05 PM Re: West Coast Corvettes [Re: teamzr1]  

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Originally Posted by teamzr1
I have seen bad dealings in the past from other Corvette owners from this vendor.

All the years they have been selling high priced performance parts you'd think they at least knew the basics or engines and superchargers by now


From the general progression of mods recommended by the different forums, it seems to me that the owners are still trusting that those forums have screened out vendors who would harm their cars. The forums, of course, have no real reason to allow dissenting views, opinions & experiences since they would affect advertising revenue. I think its going to take lawsuits against the vendors & the forums to eventually allow for owners to get a true picture of vendors & to see exactly how these recommended mods affect their cars.

#2279 - 01/09/08 03:41 PM Re: West Coast Corvettes [Re: ]  
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teamzr1  Offline
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To me it takes common sense even if the owner has no experience that if the LS2 has 32 lb injectors for 400 HP and the C6 Z06 uses 42 lb injectors for 500 HP and he new ZR1 uses 48 lb injectors for 600 HP that there is no way a boosted enging putting out 700 HP can use 32 lb injectors.

Not even if living at the north pole that never sees 80 degree weather that would cause engine to be even leaner.

This also says those with a C6 Z06 with boost do not need 60 lb injectors and some vendors talk them into as then the injector has to be commanded on for such a short time the PCM really cannot properly control the injector and if using a way too small injector the PCM has to command injectors ON for a long time causing injector's coil to heat up and again PCM has less control with long pulse width on times


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#2280 - 01/09/08 03:49 PM Re: West Coast Corvettes [Re: teamzr1]  
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teamzr1 Offline
Owner - Pays the bills
teamzr1  Offline
Owner - Pays the bills
Lives in Engine Bay

Joined: Dec 2000
Posts: 5,176
America
Here is a test to see what that Boost a Pump does or does not do.

Test 2 is same driver, same drive style and of course same weather as being done 2 hours after test 1.

This BAP has a adjuster knob that is scaled from 0 to 50.

Test 1 had knob set to 15 which is what WCC told customer.

Test 2 had knob set all the way to 50 which means pump voltage is at the highest

As results below show all that did was drop injector duty cycle to drop from 114% to 109 cry

Average PE injector needed down by 4 lb/hr and max WOT injector down by 4 lb/hr.

In the end the Boost a Pump does crap and in fact I believe the design of the C6 fuel pump electronics protect the pump from higher voltage thus BAP upping voltage to fuel pump did what shop measured with a fuel gauge on fuel rail a whooping 2 PSI gain from 60 PSI to 62 thus there is no way the BAP could cause those 32 lb injectors being reduced from 110 % duty cycle to a proper 80% or less.

Attached Files ATI-CS1-2.jpg

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