When I was younger I had a 5.0 Mustang and one of the first things to do was to advance the timing, which would gain about 5-10hp. Has anyone tried this on their Lexus, more specifically, the 3.0 I6? Does it work?

 

Sorry man I was going to reply but I don't have the answer. My friend and I were working on my car and that topic came up and he told me exactly why that wouldn't work but I can't remember and I was going to ask him next time we spoke. Those SC guys know their #@$#$ they'll probably answer your question.

 

You can't advance or retard the timing on the VVT-i based engine... unless you have a stand alone engine management system that has provisions for it, i.e., the Pectel T6. I know HKS Japan offers something called the V-Cam and the Valcon Pro (the controller)... however the application is for a 1JZ.

 

What's up AJ,

it's been awhile since you posted....you got PM!

 

Is the same true for the non-VVTi I6? The 1st gen GS and some SCs come with this engine.

 

WRONG!!!!!!!! YES you can retard timing and advance it on a VVTi car. You need to tap into the cam sensor omitting the ohms, you change that you change the timing.

Split Second in Irvine CA has the box you need 400-600 installed or something. I have the piggy back stand alone on my GS400 because I use NOS and the S/C and needed more than a/f management. I have full timing range through RPM range.

Greedy e-manage CANNOT do it.

Hope this helps.

 

...you can so much fun with this engine. you can advance and retard both timing and ignition (just get good cam gears).

 

Please tell me more. Also why do you need a piggyback when you have a stand-alone?

 

Sorry for the confusion. The software is run off the lap top which has full range for the timing and A/F. However you then FLASH the ECU. The Split second box is mounted in the engine bay with the serial port to hook up to the lap top with the software. So the split second unit is a programable piggyback unit that can be changed whenever you do a MOD.

 

Advancing timing worked a lot better in the good old days, particularly at the higher RPM ranges. Auto makers were constantly fighting leaning conditions and with the variability of fuel, particulalry those tiny minds who had 10.5:1 compression ratios and were convinced the car ran fine on regular saving maybe three cents a gallon in those days. In order to stay away from detonation, the car makers were very conservative not only on initial timing but the timing curve as well. Possibly one of the best performance moves in pre history was to have your distributor dynoed and a custom curve put in. With today's electronics, especially combined with knock sensors, the auto makers are able to get much closer on timing and my guess is that there are a lot better places to look for performance increases than fussing with the initial timing. Unless you get that Mustang back....