416 L92 will be runing tonight
416 L92 will be runing tonight i need to know if its all right to run the car on my tune i have now? right now the tune is for ls2 with a ms4 cam and bolt ons. also how long to break it in and how???
Originally Posted by 1bigcam
i need to know if its all right to run the car on my tune i have now? right now the tune is for ls2 with a ms4 cam and bolt ons. also how long to break it in and how???
Originally Posted by 1bigcam
i need to know if its all right to run the car on my tune i have now? right now the tune is for ls2 with a ms4 cam and bolt ons. also how long to break it in and how???
Just saw the engine size is the same as before. If the injectors are the same you should be fine.
I just fired my 427 a few days ago so I recently went through this.
You will need to change your IFR for the larger injectors. If not it will be too rich and that is not good at all for a new engine.
In addition to that you need to change the cylinder displacement. Since my car has ETC I also changed the ETC Throttle Area Conversion for the 90mm TB.
With these changes my car fired right up and runs supprisingly well with the rest of the tune being the one that I did for my heads/cam 346.
You will need to change your IFR for the larger injectors. If not it will be too rich and that is not good at all for a new engine.
In addition to that you need to change the cylinder displacement. Since my car has ETC I also changed the ETC Throttle Area Conversion for the 90mm TB.
With these changes my car fired right up and runs supprisingly well with the rest of the tune being the one that I did for my heads/cam 346.
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My car ran so bad with just l76/l92 and cam that said no reason won’t run. Sounds like the obvious Wrong Cam Gear for Cam Sensor or Reluctor for Crank Sensor. Check with Scanner for all inputs not just codes. You need HPT to make adjustments for new engine. I found people on there forum very helpful and did a safe to run tune for me.
I think that it depends upon what was done in the first tune.
I just fired my 427 last week. All I did to my existing h/c 346 tune was change the IFR , bump the idle speed from 850 to 950, bump up cylinder displacement, the and make a change for the 90mm throttle body that the L76 intake has. It fires right up and idles fine at 950 rpm.
Did you change your cylinder displacement? This has a huge effect on most everything else.
I just fired my 427 last week. All I did to my existing h/c 346 tune was change the IFR , bump the idle speed from 850 to 950, bump up cylinder displacement, the and make a change for the 90mm throttle body that the L76 intake has. It fires right up and idles fine at 950 rpm.
Did you change your cylinder displacement? This has a huge effect on most everything else.
Originally Posted by 1bigcam
i put the ls2 injectors back in and car still won't run. what can i do?? is the tune that far off. it was tuned for a big cam need help fast.
Although I mostly advise against mail order tuning, you could probably get a mail order tune to get you close enough to get it to a tuner. I still wouldn't "get on it" until it sees a dyno, though.
-Geoff
-Geoff
