keydiver stg3 chip and VPC question

[Pointer]

So Keydiver is offering chips that have the correction for bigger injectors. If you pair one of these with a VPC what chip do you run in the VPC? Stock? I was just wondering this and hope someone can give me the answer.

 

[kpt4321]

Yes, you would want to run the 450 chip in the VPC.

 

[spooling90gsx]

i havent seen the chips... got a link pointer? are you in the hksvpctuning group

 

[Pointer]

www.dsmchips.com

I am in the VPC group however, I have never posted.

 

[spooling90gsx]

strange because i recall someone named pointer posting quite a bit on there

 

[nowayout]

Unless it a DSMlink or Standalone it doesn't correct for bigger injector.
But I might be wrong if someone came out with a new eprom chip other than DSMLink.

 

[spooling90gsx]

it seems to me like this is just a tmo chip........ but not tmo same things change u need an eprom for this chip also

 

[Pointer]

Originally posted by nowayout
Unless it a DSMlink or Standalone it doesn't correct for bigger injector.
But I might be wrong if someone came out with a new eprom chip other than DSMLink.

Keydivers new chips do have injector size compensation. When you order the chip, you choose what size injectors you are running and he programs said injectors right into the chip. This is on the stage 3 chips only. Check it out at the link posted above.

 

[kpt4321]

The Keydiver chips will compense almost perfectly for larger injectors.

However, are you sure that is what you want? One of the reasons people use large injectors, is so that they can get more timing advance than they would in stock form. With the injectors compensated for in the ECU code, you will be back at stock timing advance values.

 

[Pointer]

This may be true but I am running 9:1 compression and plan to run a rather large turbo ie. FP3065 in the near future and the over advanced timing is what I am looking to get away from. When you use considerably larger injectors the over advance of timing can end up being a problem causing knock and forcing you to tune rich to compensate for the knock. I am actually dealing with a knock problem right now running stock boost levels with the factory maps. Extra timing is the last thing I want.

 

[nowayout]

Pionter, Your getting slow to the limits of the stock ECU.

Piggy back will get you only so far and Adjustment are limited?

 

[Pointer]

Perhaps but I am flying with the understanding that with a chip that compensates for the larger injectors I plan to run, the capacity of the ECU will be expanded allowing me to keep it. If I wind up needing to go standalone then I will.

 

[hostile]

This is exactly what I suggest to a friend of mine.

Running the stock ecu is not a problem if you can handle the larger injectors.

Especially if it is already speed density.

If you could get 850's to idle well, and you had a vpc the stock ecu would be fine.

With the gcc or afc you could then just adjust the fuel curve to your liking and be done with it.

 

[thejeebus]

Keydiver is the Man!!! After 2 years of messing with my SAFC my fuel trims are now in line and power delivery is linear. Before with my AFC I would get partial-thottle knock counts that I could not get rid of. Now I get 0 knock with 20 degrees advance at WOT on 15psi (big 16G). I swear that when I got my ECU back and installed it flooring the throttle in 1st will break the tires loose!!! Now that is an improvement. Oh yeah, AFC is zeroed out. Im going to lean it out a little up top. I've raised the boost to 18psi and Im still getting zero knock and lotsa timing advance.


scott

 

[93jdmlaser]

I have an eprom ecu and I wanna get a chip for it. I am gettin a vpc setup but it has a 550 chip. I am running denso 660s so should I get the eprom chipped programed for 660s or the vpc for 660s. I need help I have no idea

 

[spooling90gsx]

if i were you i would just run the vpc with a 660 chip and a 450 (or stock injector) keydiver chip.. thats what i did for a long time and it worked fine with my tmo. this would be the same thing

 

[hostile]

You can run 660's on a 500 chip fine anyways.

You will just need to lean it out with something else like an afc or a gcc.

If you don't have either I would suggest getting the chip made for your setup that does the correction in the ecu as oppsoed to the vpc.

 

[93jdmlaser]

Well right now I have the option to get a vpc and a chip for my ecu but for not much more I can get dsmlink. I just dont know which one to go with.

 

[NeOzz1]

If i took my car how it is now and put a chip in it set for 750cc and put 750cc injectors in the car would it run decent? obviously it will need to be tuned to be faster but will it run good or no?

 

[93jdmlaser]

Yes he can burn a chip that will compensate for your 750s you want and idle them fine.

 

[dnhieu]

this is going to sound like a complete newbe question but i had a few questions on the whole chip thing. my first question is do i NEED a eprom ecu? the second quesiton is where do i go by getting one of these chips put in? i know the chips are cheap but is installing them simple?

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