if i went to get a timing gun and did it to my 86 base. how would i go about doing so. and also is there a decent power increase for advancing the timing? and if so. would i have to change up fuel like i would for a piston engine car?

 

Try this post and the answer by Irv, Keith's father, and Ludwig. Does not get much better https://www.rx7club.com/vforums/show...threadid=29978 I've read the material from Mazdatrix and Racing Beat and they seem to say advanced timing can and will kill a rotary. So I have never done it. I'm sure there are some real racers on this site that would challange that. Not me. Just trying to get to the coast and back without problems.

 

Hmm a timing gun eh - leave it be, keep it stock and get a real exhaust oh yeah check yo pm.
Base Model club of Augusta - 3 members strong

 

There's some sound in the background that unnerves me. Your doing the right thing checking the timing. I don't see how anyone could own a car and not have a timing lite. You should'nt be touching the cas if you don't have a timing lilte. This is just basic Mechanic's One common sense. You seem to be doing the right thing getting a lite. Should'nt even drive a car if the timing is'nt set right. Not really a tirade. Just a heads up from a worry wart.

 

First let me qualify my source: The Rotary Doctor.

The young man that runs this shop comes from a line of rotary mechanics. His father was repairing the engines from the 60s and racing them in the 70s. When the old man became too old for what he liked, his son took over. His son raced RX-7s for 6 years (doing all of his own mechanic work) and then hung up his helmet and dedicated his time for repairing them. Has been doing work on all RX-7s for the last 14 years.

Point: he knows what he is talking about and has never been wrong when telling me what could be wrong with my 7.

He told me to advance my timing NO MORE than 5 degrees. Safe at a 3 degree advance. The car will get better fuel economy and have a slight HP increase (approximately 3-5 depending on the condition of your engine).

Hope this helps

 

Hello natedogg......no argument from me. Just trying to get across the idea that turning the cas ***** nilly can cause problems. From the Racing Beat Catalog ...."Retarding the timing too much will reduce power and mileage and cause the exhaust to run excessively hot, possibly damaging it, but it is unlikely to hurt the engine itself. On the other hand, excessive ignition advance can break apex seals and damage rotor housings." Then they dedicate a page to suggested timing for different configurations. So you can advance the timing from stock, but you should have a clue what and how much advance is advised from folk who have tuned rotary engines for , well since at leasts 1971. I've run advance a couple of degrees in the past but nothing radical and I had an idea how much off I was due to the timing lite. Rotary Doctor sounds like a good outfit. I'd advise buying the Racing BEat catalog. It has a lot of good advice. Its not found on their site. Its an item you have to buy.