FC RX7 5.0 race car thread

[Teeson1111]

Edit: forgot to ask, did your radiator cause you any grief as far as air pockets in the cooling system? Since the rad cap is not the highest point in the system. Just curious about that cause I'm about to order a radiator and clearly all the 5.0 swaps must make the cooling system work correctly lol. Just covering my bases

Oh yes i did. I found a way to bleed it (painfully slow) first with the top coolant hose off to fill and then a tall funnel off the rad cap.
I have pics some where of 2 other local 5.0 swap cars (miata, E30) that did something to fix that. I had envisioned something like a water outlet neck with a rad cap on it. Easy solution would be an inline rad cap like so:

[Zach Thomas]

Hahaha nice buy! I know the internal struggle of how it all goes... "I'll buy this part next" and then all of a sudden you have another toy in the garage. Looks clean though! Should be cool to have the ability to drive the two cars back to back

Edit: forgot to ask, did your radiator cause you any grief as far as air pockets in the cooling system? Since the rad cap is not the highest point in the system. Just curious about that cause I'm about to order a radiator and clearly all the 5.0 swaps must make the cooling system work correctly lol. Just covering my bases

[Teeson1111]

So I apologize for the delay, gotta build up suspense or something

no I didn't buy wheels, thats just inevitably never going to happen soon. Like that couple in that show that just never gets together even though you think they will, I'll inevitably keep buying other things first haha

So I bought this:






The mintiest 1987 RX7 GX I've ever laid eyes on. Its rotary, automatic, slow, rust free, and unmolested in every way. The exhaust is leaking like the titanic but it still passed a smog check (). Literally nothings been modified since it rolled off the assembly line. That however is time to change.

Bought it off a friend who went back to an s13, he had collected a bunch of parts to do a 5 lug hub/ brake swap and he had a t2 diff we think is from an S4 anniversary.
So that diff is probably going to go into the V8 car (love saying that) and the diff in the v8 car is gonna go in the daily. As well as the steering wheel and the coil overs and the camber bar. Then i can buy better coil overs for the V8 car, and once again put off buying wheels.

I also kinda want to go to a black interior, fit some dished wheels I can afford in there and put a decent stereo in there. Oh and most importantly, a 5 speed swap.

It'll probably stay powered by triangles for the foreseeable future. gotta balance my zen with the rotary gods (or something) (more like angry rx7 purists aha)

[Teeson1111]

Ordered the bracket to lower the alternator this morning, thanks for the info. Ive been searching around a bit and havnt had any luck finding some info, but would you happen to know if there is a way to add a check engine light into the foxbody wiring? I would like to know something is wrong before i push the car too hard, i just have no idea how possible it is.

there is a way yes, just quickly looking Veryuseful this diagram tells me its pin 17 which is tan.

give a fuse'd 12V on ignition to that guy and put a light on one end

like so



then I'm sure you know you can pull codes to find out whats "wrong" with it (lol EGR and other emissions crap)

[LaMaR-]

Ordered the bracket to lower the alternator this morning, thanks for the info. Ive been searching around a bit and havnt had any luck finding some info, but would you happen to know if there is a way to add a check engine light into the foxbody wiring? I would like to know something is wrong before i push the car too hard, i just have no idea how possible it is.

[DER E30]

Sub'd.

Currenlty in the process of ripping my wife's widebody FB apart to do an LS1/t56 swap this winter. I wanted to do 5.0 but happy wife=happy life so way more $$$ was spent.

Installing LS1 because wife said so. Sounds like winning!!! Sounds like an awesome wife!

[DonkeyPunch]

Sub'd.

Currenlty in the process of ripping my wife's widebody FB apart to do an LS1/t56 swap this winter. I wanted to do 5.0 but happy wife=happy life so way more $$$ was spent.

[DER E30]

This is sooooo neat!! Really clean cage install and just awesome! DIY at its best!!

[LaMaR-]

Thanks again, I'm currently searching for a upper and lower intake manifold, I'll have to search around today for the alternator bracket you speak of👍

[Teeson1111]

Thanx Zach!

Something pretty awesome happened this week, I'll try and update tomorrow

[Teeson1111]

Lamar, the alternator bracket can make a difference as well. Either a low mount style or an sn95 will just clear.
Intake manifold is as stated above, sn95 upper and lower. If you still can't get it to clear (mine makes it by millimetres) then you can mill the intake a bit or make spacers to space the subframe down.

[LaMaR-]

Thanks Zach, time to start the search, ill start updating my thread again this week hopefully lol. I have some huge changes that are about to happen

[Zach Thomas]

The exhaust looks good! I wouldn't want to tackle one myself, so good on you for going for it and making it happen!

hey man I'm finally back state side trying to figure out how to make this motor fit under my hood, quick questions though, does the SN95 motor sit lower then the fox body?? Or is the difference the SN95 upper and lower intake manifold??

Its just the intake manifolds

[LaMaR-]

hey man I'm finally back state side trying to figure out how to make this motor fit under my hood, quick questions though, does the SN95 motor sit lower then the fox body?? Or is the difference the SN95 upper and lower intake manifold??

[Teeson1111]

What is the benefit to running an x pipe? couldnt you just run two separate pipes all the way back? I mean they just cross then go back to separate pipes. Im asking because I honestly dont know

Without getting too specific, yes there is a good reason for the x pipe. It creates better scavenging, the exhaust gasses get pulled out from the vacuum created from the previous exhaust pulse. Connecting the 2 banks creates even better scavenging than 2 separate pipes, and while it's up for debate X shaped pipes may do it even better than H shaped pipes.

There a lot of research on can do on this topic, we've been messing with gas engines exhaust for like a 100 years and we're still learning things even today