Im in the process of piecing together parts for my h22 to get it ready for the spring. Im looking to make roughly 300-350 whp. What size injectors do you think I need? Also what is a reputable brand? RC Engineering is the first thing that always comes up in my mind. Also what is the difference between peak and hold injectors and saturated ones? Help would be much appreciated. Thanks.

 

RC, Precision and other makes are widely used and work well. If you use around 700cc injectors, they should be good for 450whp or more. Seems like 550cc would be adequate for the 300 - 350 range. If you use the larger ones they will allow you to increase your hp without buying another set of injectors.
If you are adequately tuned for the 300 hp level you should be ok. If you engine isnt built (sleeves, pistons) stock ring lands are a weak point. Again, good tuning with proper AFRs and timing, for the engine and boost level that you wish to run, is critically important.

 

Great Info. So what is the difference between peak and hold and saturated injectors?

 

ttt

 

This is a good start for the injector math:

http://www.rceng.com/technical.htm#WORKSHEET

good luck with your project.

 

presicion