/\ /\. Exactly..the Wiring on the car has an 80 amp Fuse.Now IF you Put on an FD alternator,and I am Assuming that you would be doinmg that beacuse you would like to have an "Obnoxious 2,000 watt 3 foot Woofer to annoy people at Stop lights" Stereo..(Just kidding man!)..then that Stereo,or Whatever would have it's own Wiring,and Not be Running through the 80 amp Car wiring.Even the Aftermarket Electrical fan is Wired to the Battery,somehow.That won't suck as much as what the Wiring is meant for.The alternator only Puts out what it need to(as TED said..it comes down to how much the Circuit is Drawing,amperage wise)..So,..In short What I am Saying is:Save your Freakin 6 Bucks(new 100 amp main fuse cost).!..You just Plain Don't need it.

Thanks guys for all the replies. I will not change the main fuse on the car after reading your comments and getting your advice. The reason I got an FD alternator is because I got it for free since its easier to have access to FD parts than FC parts here. I am probably one of the handfull fcs in my town. Its all FDs and Rx8s here. For every 30 Fds you see you are lucky if you see one FC :-) Some of my friends drive 2002 spirit R Fds, RZs and most of the FDs here are 96+

Does the FD alternator bolt right up to the S4 and S5's? Also matching electrical plugs.?

bolts up to s4 and s5 physically, but I have found that unless you want to use a longer belt, there is a small section on the underneath area of the FD alt that needs to be ground/cut off to allow full range of adjustment. ITs a small piece of the case on the bottom, near the main bolt that holds the alternator to the waterpump housing.

it plugs right into s5 models, however s4's require the 89-95 plug and a larger ring terminal for the B+ wire.

Swapping the FC B-post onto the FD alternator is much easier. You also need to rewire the 2-pin plug to provide constant (instead of switched) power to the S terminal, otherwise you'll flatten the battery.

Alternator schematics: https://www.rx7club.com/attachment.p...hmentid=199213
Alternator pin-outs: https://www.rx7club.com/attachment.p...hmentid=170065

nzconvertable argues with everyone ...ban this guy

He does tend to be argumentative, but he also posts a lot of useful information so I would not say anything about banning. He is just a little too attatched to forcing his personal opinion on others as the only way things can/should be. He's quite a smart feller...or a fart smeller? :lol:

Along with HAILERS and a few others on here, he is one of the "purists" who believe we should all enjoy basically stock cars as mazda intended back in the 1980's with as few changes as possible. ...Because we all know that mazda's 20 year old design was perfect, had no flaws in engineering or compromises in part quality, and no technological or design improvements have been made since that time. And no one really needs more than 175 whp anyway, so you should just be happy with your rotary engine in stock form without molesting it. :rolleyes:

This is clearly illustrated by such owner favorites as the leaky pulsation damper, well contstructed electrical solder joints in the interior electronics, the short thermowax hose on turbo engines, exceptionally sensitive (compared to other cars) TPS sensors, etc.

I'm going to have to add that to the list of strange shit you've posted in your short time here. (Or are you an old member with a new profile?) I have zero interest in owning a stock FC. While my car isn't as extensively modded as others, it's got a long list of mods and changes, almost all performed by my own hands. It would have more if time and money allowed. Do you have any basis for this bizarre claim? Where are all my posts saying "don't modify your car!"

More nonsense. I'm an engineer. I like improving things on my car, particularly if I can apply new technology. I'm not, however, one of these simple-minded people who rip stuff off their car because they don't understand it or are too cheap to fix it. I weigh up the pros and cons of any mod before making a decision, rather than blindly following current internet "wisdom".

Oops, I've "molested" my engine well past that... :p:

I laugh every time someone whines about the thermowax hose. It's easy to get on and it's easy to get off. If you find it hard, that's because you haven't figured out the easy way yet. :)