HKS FCD for BPU

Hi All

SLowly but surely getting my BPU stuff together for the big install and received y HKS FCD today, what am I setting this at for the 1.2 bar of JDM BPU? Probably a stupid quesiton but just thought I would ask people who know infinitely more than me.

The HKS FCD is probably the worse one you can fit mate, I wouldn't fit one, have a read here: http://www.mkivsupra.net/vbb/showthread.php?343619-Top-quality-fuel-cut-defenders-(FCD-s)-for-sale

Setting 9

Do you have one fitted on yours Mk4Gaz and any issues if so?

I had one fitted to mine on setting 9

I bought my FCD from Chris Wilson, can't go wrong

Do you have one fitted on yours Mk4Gaz and any issues if so?

No mate, I bought one but realised I had a mines ecu, so didn't need it.

I'm now running stand alone, so still don't need one!

Some people have had issues with them, and others have had no problems. I think they work by bending the map sensor signal, to tell the ecu you're running less boost than you actually are.

You need to careful with your settings on the HKS FCD, especially when targeting a higher boost level like 1.2 bar.

I've seen a few people adjust fuel cut limit without monitoring Air-Fuel ratio not knowing that with the HKS unit the more you increase the fuel cut limit the leaner it will make your engine run. Leaner fuel ratio will make the car feel faster which feels good, but you could be doing damage in the long run.

Toyota ECU does run stock quite rich from factory so there is some room to play with with leaning out the fuel a bit, but without monitoring the change you have no idea if you are doing so safely.

Considering every engine & setup runs slightly different, I'd advise trying to get some sort of temporary AFR monitoring setup whilst dialing in your HKS FCD, before blindly following settings posted on a forum. Just to be on the safe side.

I believe FCD from CW does not suffer from this side affect.

Thanks guys I decided not to risk I and just bought one from Chris Wilson. I went for the HKS because its the one in the BPU 'kits' and had high praise on here at the time I looked but I dont think there's any point in skimping when I've already spent so much on BPU bits. I'll get an AFR gauge anyway as they make sense and are dirt cheap what kind of readouts should I be seeing at 1.2 boost on one of these to ensure the setup is not causing damage?

Thanks guys I decided not to risk I and just bought one from Chris Wilson. I went for the HKS because its the one in the BPU 'kits' and had high praise on here at the time I looked but I dont think there's any point in skimping when I've already spent so much on BPU bits. I'll get an AFR gauge anyway as they make sense and are dirt cheap what kind of readouts should I be seeing at 1.2 boost on one of these to ensure the setup is not causing damage?

With your AFR gauge you under boost you want your air fuel ratio to be sitting at around 11.5.

Thanks guys I decided not to risk I and just bought one from Chris Wilson. I went for the HKS because its the one in the BPU 'kits' and had high praise on here at the time I looked but I dont think there's any point in skimping when I've already spent so much on BPU bits. I'll get an AFR gauge anyway as they make sense and are dirt cheap what kind of readouts should I be seeing at 1.2 boost on one of these to ensure the setup is not causing damage?

Wise choice

I have a Greddy one coming off this weekend as I now have a mines ECU

I’ll have your Greddy bcc buddy if your selling