When should I switch over to a Rising rate regulator? Are there any side-affects? Which one would be the best to get? Also is it hard to install? Thanx!

 

When you can't afford an injector controller.

 

An AIC is cheaper than the rising rate.

 

I meant a duty cycle controller, but on another point: Where can you find an AIC (with injectors) for under $150?
(http://www.injectionperfection.com/h...ce_list_3.html Malpassi unit in aussie dollars).

A rising rate FPR is often referred to as "the poor man's ECU". They don't offer any rpm-specific tuning and they lower fuel pump output; they can only add fuel under boost reference based on a linear rate.

Very few people use a RRFPR. Why do you want one?

 

RRFPR's are a band-aid for injectors that are too small, that's all. If you use one to squeze more fuel from maxed injectors, you'll need some way to tune the mixtures, which will be too rich. In that case you might as well get bigger injectors and tune them in properly.

 

I can get more than just the AIC and injectors for under 150.00. Even less because I have extra injectors. Slightly used of course. Im not talking new here.

I was told it would be a good idea to get one. So with 680's and 720's you think the stock one will do fine? Thanx for the help guys!