A friend of my have bought a set of siemens deka that should be 83Lbs, But when we installed them and changed the injector constant to 83 it run wery lean so we changed the constant to 75 and after that it idels fine. So this have made me wonder if we got the right injectors They are labled 3105. Is it someone who knows which size the 3105 are?

 

Did you change the injector offsets as well?

 

No we didnt change the offset, when he bought them he asked if he should change the offset, but it shouldnt be nessesery acourding to the shop.
So there for we got a little worried that they had send wrong injectors...

If its nessesery to change the offset, can someone send a copy of a goodworking tune for 83lbs siemens to camaro@z28a.com ?
Thanks
ake

 

Anybody

 

Not all injectors are flow rated & tested the same. You will find if you did a lot of injector flow testing, some flow fat up top... some low.. some mid. Thats why with any injector swap, tuning (beyond changing the injector constants & offsets) is usually needed.

I realize that doesnt answer your part# question, but might give you some insight as to whats going on... assuming they're the correct injectors.

 

Ok I understand that, but from 83 -> 75 ... Have changed injectors on our car from 24->42->60 and tested pressure from 40-65 psi and havent had any trouble...
So before we start to "tune" it looks like a good idea to check that we got the right injectors or at least have a bin or Lt1 file to compere widh..
Thanks anyway gimpster
ake

 

I assume you have the low-Z injector Acceleronics converter box, If not it will never run right.

 

3105 = 83lbs..

i got 16 sitting in front of me..

 

Yeap, he got an converterbox.
Flyin_Hawaiin, Thanks for the answer