Re: 3508B firing angle & ignition timing and order needed

The mystery is solved.


The 3508B and the G3508 (CCW) have the same core iron, it is a split pin crank with a 90 deg interval.

Cylinder firing order is: 1 - 2 - 7 - 3 - 4 - 5 - 6 - 8



The 3512 is standard with a 60 deg interval (Cylinder Phase Angles)













Re: 3508B firing angle & ignition timing and order needed



Thank you for your answer.

We knew the specs from the engines:


3508B - CCW rotation - firing order: 1 2 7 3 4 5 6 8  

3512B - CCW rotation - firing order: 1 12 9 4 5 8 11 2 3 10 7 6 


So we knew that it`s CCW and not the 3512C Tier 2 engine.


We want to know the degrees (crankshaft) between the firing from each cylinder, the timing is dynamic but angle between every head should stay the same !? 

I assume 60° as firing angle. But it´s not verified up to now.




Trusted Contributor

Re: 3508B firing angle & ignition timing and order needed

Hey Robin,


This is very tricky business since 3500 engines are availeble in aswell CW and CCW engine rotation.


Then secondly the firing order can deviate between 3512 models since the 3512C Tier 2 CCNR model is introduced.


Then third the timing is dynamic to the enigne speed, cooling water temperature and applied load to the engine.

Accepted Solution

3508B firing angle & ignition timing and order needed

Dear all,


iam complete new in this forum and first of all i want to welcome everyone. Im not  really sure if this is the correct topic for my questions,so feel free to tell me if this is the wrong topic/section. Further, some fact about our background:

We are a small dutch company located in Heerlen-NL involved in following areas:

- Development and production of engine management electronics
- Development and testing of new engine technologies
- Engine test bench facilities for testing and development of gas engines
- Design and implementation of engine test benches
- New applications for existing engine electronics
- New engine electronics for specific applications
- Research assignments and consultancy on engine technical issues


For a running project we need information about the 3508B series 60° V8 engine  (2HW00349  arg#  174-4949)   

The question is, we need to know the ignition timing and order for the counterclockwise used engine with firing order: 1 - 2 - 7- 3 - 4 - 5 - 6 - 8

Further also for the 3512B. 


It would be great if someone could help us with some informaions!


Kind Regards and many thanks in advantage,