I drive mine on the street and let it sit in grid @ auto-x's running with the fan on I have never over heated the car. plus with out a shroud you will allow more air flow thru the rad on the track because your not forcing the air thru the shroud.
magnumP5's RX-7 Build Thread
- Thread starter magnumP5
- Start date
Interesting; your experience goes against just about everything I've read, haha! I'm curious what your fan area to radiator area ratio is. Even with a 16" fan I have quite a lot of "uncovered" surface area so I'd probably only be utilizing 60-70% with the fan. I get your point about the shroud being a restriction on track. This is why I didn't want a "flat" shroud to begin with. I should make a shroud with "flaps" that open when the car is in motion that are closed when it's stationary.
I'll snap a picture of my e-fan on my radiator when I get the chance. The FC radiator is a little bigger than the SA/FB one. Marc, do you know the specifications of your radiator (e.g. flow rate, max. current draw)? Mine should be around 3000 ft^3/min at <20 A if I recall correctly. The only other reason I wanted to run some kind of shroud is because I planned on eventually connecting it to some kind of duct that vented out the hood. I was thinking about this more and a shroud shouldn't limit the amount of air going through the radiator. According to conservation of mass so long as the flow isn't supersonic (choked) the area reduction (fan shroud) should only serve to increase the velocity of the flow. This is obviously ignoring pressure effects in the engine bay but it seems to make sense to me. This isn't saying I could get away without a shroud, but I guess what I'm saying is I should do a little more reading.
I know. I went to school for it too
Same undergraduate degree and I have a masters in it too (aerospace engineering) 
But you don't have to be an engineer to follow understand conservation of mass. Basically whatever amount of fluid enters a volume has to exit. So if the exit area is smaller fhe fluid either moves faster or gets more dense or both. That's the simple explanation but obviously there's a lot more to it.
Hahaha, do it! Seriously, the RX-7 serves no practical purpose so I can justify throwing money at it to modify and generally make even more impractical. At least, this is what I tell my wife
A little birdie tells me some packages have been delivered. Pictures to follow tonight or tomorrow
BOOM!
17x9 +22 Enkei RPF1 in black (special order) with 255/40R17 Dunlop Direzza ZII (successor to the Star Specs):
Comparison of 255/40R17 versus 205/60R15 (what's on the car now). I'm surprised how great the diameter difference is.
Unfortunately the hub rings that came with the wheels don't fit. 59.2 mm != 59.6 mm, thanks Tirerack! Because of that I didn't mess with mounting the wheels, but here's a couple mock up shots.
Rear:
The perspective makes the new wheels seem huge, LOL!
Front.
They still look huge but with the front lip and side skirts I think everything'll even out. I'll probably have to raise the car a bit when all is said and done, which will prove difficult in the rear (already about max'd out). Looks like I'll need to put more preload on the helper springs.
Oh yeah, just a little bit of poke in the front
(+20 mm wide fenders coming soon).
Inside clearance is tight in the front but looks doable. I'll check again when the hub rings come in and I put the car back on the ground. Hopefully I'll be able to back off the camber bolts some (added positive camber for last setup) so I can get a little more camber. I'm hoping for -3*/-2* F/R. The inside clearance in the rear will be just fine but I'll likely be massaging the fenders a bit. I'm quite pleased with how everything turned out. I know a lot of people don't like black wheels but I think they work on this car (everything is red/black).
17x9 +22 Enkei RPF1 in black (special order) with 255/40R17 Dunlop Direzza ZII (successor to the Star Specs):
Comparison of 255/40R17 versus 205/60R15 (what's on the car now). I'm surprised how great the diameter difference is.
Unfortunately the hub rings that came with the wheels don't fit. 59.2 mm != 59.6 mm, thanks Tirerack! Because of that I didn't mess with mounting the wheels, but here's a couple mock up shots.
Rear:
The perspective makes the new wheels seem huge, LOL!
Front.
They still look huge but with the front lip and side skirts I think everything'll even out. I'll probably have to raise the car a bit when all is said and done, which will prove difficult in the rear (already about max'd out). Looks like I'll need to put more preload on the helper springs.
Oh yeah, just a little bit of poke in the front
(+20 mm wide fenders coming soon).
Inside clearance is tight in the front but looks doable. I'll check again when the hub rings come in and I put the car back on the ground. Hopefully I'll be able to back off the camber bolts some (added positive camber for last setup) so I can get a little more camber. I'm hoping for -3*/-2* F/R. The inside clearance in the rear will be just fine but I'll likely be massaging the fenders a bit. I'm quite pleased with how everything turned out. I know a lot of people don't like black wheels but I think they work on this car (everything is red/black).
Perro del Sol
Member
- :
- 2003 MSP, Spicy Orange, 2004 Mazda 6 Hatch, 2004 Mazda 6 Wagon
BOOM!
17x9 +22 Enkei RPF1 in black (special order) with 255/40R17 Dunlop Direzza ZII (successor to the Star Specs):
Comparison of 255/40R17 versus 205/60R15 (what's on the car now). I'm surprised how great the diameter difference is.
Unfortunately the hub rings that came with the wheels don't fit. 59.2 mm != 59.6 mm, thanks Tirerack! Because of that I didn't mess with mounting the wheels, but here's a couple mock up shots.
Rear:
The perspective makes the new wheels seem huge, LOL!
Front.
They still look huge but with the front lip and side skirts I think everything'll even out. I'll probably have to raise the car a bit when all is said and done, which will prove difficult in the rear (already about max'd out). Looks like I'll need to put more preload on the helper springs.
Oh yeah, just a little bit of poke in the front
Inside clearance is tight in the front but looks doable. I'll check again when the hub rings come in and I put the car back on the ground. Hopefully I'll be able to back off the camber bolts some (added positive camber for last setup) so I can get a little more camber. I'm hoping for -3*/-2* F/R. The inside clearance in the rear will be just fine but I'll likely be massaging the fenders a bit. I'm quite pleased with how everything turned out. I know a lot of people don't like black wheels but I think they work on this car (everything is red/black).
Nice wheels love the color.....Sorry Larry!!!! hahahahahahahahahahahahahahaha
And concave! Sorry, but I've never had concave wheels before and I'm excited
You're telling me! And I thought my previous setup was "meaty." The only thing now is my brakes look TINY! Unfortunately I don't think I could ever upgrade to a BBK as I think most interfere with the concave RPF1's. Oh well...
They're a lot glossier than I thought they would be. I think they'll match up nicely with the black taillight bezels and I'm planning on painting some/all of the splitter black as well. The only thing is the finish doesn't seem to be too durable. I slipped taking the wheel off the front spindle (it moved because there's no steering rack!) and that was enough to scratch off the pain in the back in a few places. This is also the first set of RPF1's I've owned that don't say "Enkei" all over them. If it ends up bugging me I know I can find red stickers for them.
mymmeryloss
Member
- :
- 13bT Mazda B2600i
Damn thems some meaty tires!
If you ever have a questions about fitting wheels or tires on the FC let me know as I've done quite a bit of research on it. It's hard to find good information now due to the drift/stretched tire scene.
Thanks! You have a lot more patience than me if you read through all my rambling in one sitting!
And I thought the 215/40R17 on my old Protege5 was meaty! It's going to be a b**** to turn the front wheels without P/S now!
Im a huge FC fan, so reading this definitly beat working lol
