how big a shot can you go ith 39# injectors and a stock feul pump. a friend just asked me. side note, i typed fuel pimp twice, lol, somebody move the i further from the u.

 

I was told not to exceed a 125 shot without changing the pump by my shop (I think I also read it in the Zex paperwork). However, I also have a custom dyno tune for that 125 shot (if your engine is modded the kit may recommend a custom tune Zex does). That being said I would recommend checking with the provider of the kit for their recommendations. I would then start small and work my way up if he's planning on doing it himself.

 

thanks for the info, i'll pass it on.

 

I used to shoot a 125 shot, it did not work, it ran lean, I had to install KB boost a pump to get enough fuel.

 

interesting. did u retard timing enough on the 125 shot?