Mr.T said:
So which do you guys think is better, the URD or the 7th injector?
Well in my opinion this is the order in which I characterized "better"
1) Full blown URD fuel Kit
Upside is you have plenty of fuel delivery capability to keep up with the SC and end user tunability.
Downside is possible warrantee issues and a lot of time tuning(or learning how to tune, but a fun process).
2)7th injector with URD’s AIC and walbro fuel pump
Upside is it is Toyota approved so you shouldn’t have any warrantee issues(if you take off the AIC controller prior to taking it in to the Stealers), and still end user tunable(to a certain extent).
Downside, you are injecting fuel through the SC(I think) and it is not known what the long term effects will be, also fuel delivery isn’t as efficient/accurate as injecting it directly to the combustion chamber.
3)7th injector alone
Upside is it is completely Toyota approved and “shouldn’t” get any warrantee issues.
Downside, the same as in #2 and it is not end user tunable. It may not completely cure the ping issue, and it is more expensive than the URD kit.
However, unless you live in higher elevations(above 5K) any of these fuel mods are needed and will make a difference.
Take this as just my opinion and definitely not as 100% accurate, just what I got from all the reading I did prior to my final decision on the URD kit.