Boog Posted March 7, 2015 Share Posted March 7, 2015 Hi everyone, I recently slapped a turbo on my recently rebuilt 76 280z. N42 block and head, stock electronics. I need suggestions on a couple of things. My plan is to convert to megasquirt this summer, but until then I just want something that will run fairly well until then. I have a wideband setup recently installed, stock turbo, turbo injectors, and a ported N42 head. I should be at about 8.3:1 compression. My questions are as follows: 1. Should I lock my mechanical advance completely, or only half way? 2. What should my FPR be set at? 3. What should my timing be set at?I know a lot of this is dependent on my setup, and there is no correct answer, but I mainly just need to know where to start with it. I appreciate all input. Quote Link to comment Share on other sites More sharing options...
s30kid Posted March 8, 2015 Share Posted March 8, 2015 BE CAREFUL WITH TURBO-ING A STOCK IGNITION AND FUEL SETUP. I made this mistake last year. "I'll just run low boost for now until I get my megadquirt setup" I blew my motor up within a week. However I did not have a aftermarket fuel pressure regulator. You may be able to get away with it but be careful. I would lock the mechanical advance in the dizzy and set it to 10° tdc. That gives you 15° on boost and you should be safe there. Just dont lean out. Quote Link to comment Share on other sites More sharing options...
Boog Posted March 9, 2015 Author Share Posted March 9, 2015 I am in the process of locking the dizzy as I type. Thanks for the timing reference, I'll start there and adjust accordingly. Quote Link to comment Share on other sites More sharing options...
s30kid Posted March 15, 2015 Share Posted March 15, 2015 For the record Im running 12 ish PSI of boost with 10* timing TDC with a locked dizzy, megasquirt for fuel, 440cc injectors and walbor 255 fuel pump. As long as you dont lean out the car should run good. Quote Link to comment Share on other sites More sharing options...
grillhands Posted March 20, 2015 Share Posted March 20, 2015 I am in the process of locking the dizzy as I type. Thanks for the timing reference, I'll start there and adjust accordingly. Can you post pics on how you are locking it? I'm in the same boat as you and I've read that we would need a FMU rated at 8:1 I believe. Quote Link to comment Share on other sites More sharing options...
frodriguezvsi Posted March 28, 2015 Share Posted March 28, 2015 Hi Nismo, you mention you are running Megasquirt for Fuel. How are you controlling the Ignition? Quote Link to comment Share on other sites More sharing options...
frodriguezvsi Posted March 28, 2015 Share Posted March 28, 2015 Hi Grillhands, here is a good thread on dizzy lockout. http://forums.hybridz.org/topic/121378-280z-dizzy-lockout/ Quote Link to comment Share on other sites More sharing options...
Xnke Posted March 28, 2015 Share Posted March 28, 2015 I hope you guys realized that the stock NA injectors are electrically incompatable with the turbo injectors...the N/A ECU will not run the turbo injectors without a resistor block. Locking the dizzy will help, but ultimately you are going to be driving a time bomb until you can get your MS installed...it's about 600$ away since you've already got the wideband installed, just wait and do it right the first time. Is it worth the cost of a second rebuild, just to drive it for a few weeks?? Quote Link to comment Share on other sites More sharing options...
Tony D Posted March 29, 2015 Share Posted March 29, 2015 Why are the injectors different between turbo and NA again? I think this is in error. Just because there is no resistor pack doesn't mean the injectors changed, just the driver circuits in the ECU. Quote Link to comment Share on other sites More sharing options...
s30kid Posted March 30, 2015 Share Posted March 30, 2015 I believe its pin #1 on the 280z ecu harness connector. Anyway if you wire that pin to the pin on Megasquirt for the rpm signal it works perfectly however you dont get ignition tuning. You also need to go into Tunerstudio and run it as fuel only. It works well if your not running more then 8psi, Anything over and you really should run megasquirt for timing. Quote Link to comment Share on other sites More sharing options...
grillhands Posted March 30, 2015 Share Posted March 30, 2015 Hi Grillhands, here is a good thread on dizzy lockout. http://forums.hybridz.org/topic/121378-280z-dizzy-lockout/ Thank you, sir Quote Link to comment Share on other sites More sharing options...
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