PCS Tuning (Paul Claude) or HTE Performance (Hassan) for Karbonius CSL airbox tune?

[Jimbo's M]

Not saying anything positive or negative about that particular vendor (I know nothing about them), but there are a TON of very convincing Chinese fake Bosch injectors out there

I got my injectors from Polmaxracing (but still have yet to install them) and then used this for verification. Is it foolproof? Probably not, but better than a sharp stick in the eye.

https://protect.bosch.com/

[thegenius46m]

Not saying anything positive or negative about that particular vendor (I know nothing about them), but there are a TON of very convincing Chinese fake Bosch injectors out there, than can lean your engine to failure when they give up. I would be suspicious of any good deals, and not want to buy this product from anyone who isn't an established company with a name to lose.

https://www.bigbanginjection.com/why...SAAEgK48_D_BwE

Derek Polmax is actually highly regarded in the industry so you're good through him but yes, the fakes are sadly a very real thing.

[duracellttu]

Just a little update here...

Ive been working with Hassan over the past month and it appears there was some miscommunication between us one way or the other months back. Either way doesn't matter because he went out of the way to make this right and gave me a lot of insight that other guys aren't going to tell you which says a lot about his character and expertise here.

Big one is the injectors... that was my primary problem here. My fuel trims were maxed out all across the board, not just up top so he really had to dial back the tune originally to keep everything safe due to hardware limitations. I thought it was only in the higher revs so blamed a tuning issue. Clearly not solely the case here. I upgraded to EV14 Bosch 550cc injectors and it is night and day.

Hassan was almost completely able to fix the drivability issue I had before because he had to detune for the lack of fueling from the stock injectors.

With porting, schrick 280/272 cams, upgraded and lighter single groove valves, and the 550cc injectors the car is still making power on the dyno at 8600rpm without drop off and it feels considerably faster from 3k+. With stock injector the power dropped off at 8200rpm and the car drove like crap imho. Bucking and hesitation is virtually gone and drivability is significantly improved. The engine feels smoother and pulls significantly harder all the way from 3k up.

My head is flowing so much air that he had to add a significant amount of fuel to get the AFRs in check and the result is exactly what I was looking for, a stock like driving experience with significantly more power.

Long story short, if you do cams or anything more than basic bolt ons, just do yourself a favor and upgrade to a higher cc injector. Stock is a genuine waste of time and the tuning will suffer greatly.

We’re you able to use ProTuner or another software to verify the injector duty cycles being maxed out? I’d like to try and see where mine are with the stock injectors and recent tune. If so, what tables should we reference?

[EthanolTurbo]

We’re you able to use ProTuner or another software to verify the injector duty cycles being maxed out? I’d like to try and see where mine are with the stock injectors and recent tune. If so, what tables should we reference?

Stock injector duty cycle is like 85-90% at stock 280 whp I believe. So imagine what it's at if you're making 20-25% more power...

[duracellttu]

Stock injector duty cycle is like 85-90% at stock 280 whp I believe. So imagine what it's at if you're making 20-25% more power...

Wow, how is this not more widely known? When reading through all the different cam and CSL airbox upgrade threads I never saw one mention of upgrading fuel injectors. Wondering if that’s why I’m flat lining up top.

This is my build progression. Green is current setup.

[eacmen]

Wow, how is this not more widely known? When reading through all the different cam and CSL airbox upgrade threads I never saw one mention of upgrading fuel injectors. Wondering if that’s why I’m flat lining up top.

This is my build progression. Green is current setup.

Could be. Flatline up top could also be vanos related.


Sent from my iPhone using Tapatalk

[heinzboehmer]

Wow, how is this not more widely known? When reading through all the different cam and CSL airbox upgrade threads I never saw one mention of upgrading fuel injectors. Wondering if that’s why I’m flat lining up top.

This is my build progression. Green is current setup.

There was a good amount of discussion about this on the old forum, no so much on this one. Some good info in this thread though: https://nam3forum.com/forums/forum/m...fuel-compliant

[duracellttu]

There was a good amount of discussion about this on the old forum, no so much on this one. Some good info in this thread though: https://nam3forum.com/forums/forum/m...fuel-compliant

Thanks! Can the stock fuel pump handle the 550cc injector demands?

[heinzboehmer]

Thanks! Can the stock fuel pump handle the 550cc injector demands?

I'm honestly not sure.

Do the typical supercharger kits come with an upgraded fuel pump? If not, then it's probably fine

[bmw m3 s50]

Not saying anything positive or negative about that particular vendor (I know nothing about them), but there are a TON of very convincing Chinese fake Bosch injectors out there, than can lean your engine to failure when they give up. I would be suspicious of any good deals, and not want to buy this product from anyone who isn't an established company with a name to lose.

https://www.bigbanginjection.com/why...SAAEgK48_D_BwE

Yes, I have definitely read up on issues from Chinese Bosch injectors and the dangers that they present.

My question is, if the seller is stating that the injectors are manufactured in Germany could there still be any issues? How could one tell if the injectors are made in Germany or China?

[bmw m3 s50]

Derek Polmax is actually highly regarded in the industry so you're good through him but yes, the fakes are sadly a very real thing.

So you don't think there would be any issues buying those injectors through the Polmax site for a setup similar to your setup?

[Tbonem3]

Yes, I have definitely read up on issues from Chinese Bosch injectors and the dangers that they present.

My question is, if the seller is stating that the injectors are manufactured in Germany could there still be any issues? How could one tell if the injectors are made in Germany or China?

Think it would depend on where polmax is buying from. Maybe you can ask him, and say that you've read about how good the fakes are.

[Jimbo's M]

Yes, I have definitely read up on issues from Chinese Bosch injectors and the dangers that they present.

My question is, if the seller is stating that the injectors are manufactured in Germany could there still be any issues? How could one tell if the injectors are made in Germany or China?

I'll assume you didn't see the verification site I listed at the top of this very page...

[bmw m3 s50]

I'll assume you didn't see the verification site I listed at the top of this very page...

I did but assume that the site won't help until you have the actual injectors to run the numbers on the verification site. Would be nice to know before even making the purchase.

[Jimbo's M]

I did but assume that the site won't help until you have the actual injectors to run the numbers on the verification site. Would be nice to know before even making the purchase.

Sure it would. That said, gotta start somewhere. If you're worried about the purchase, contact them and verify that they're returnable, especially if https://protect.bosch.com/ says they're fake. For all I know, they use the site themselves.