alnielsen

iTrader: (4)

I think it would **** them off more than putting a LS engine in it.

pistonhater

haha, true.

So much hatred for the poor RENESIS

rotarygod

I think a Renesis FD would be awesome. Imagine a car that stock weighed around 2600ish lbs. Now get rid of the extra weight of the twin turbo/intercooler/piping. You'd also get rid of the complexity of the 76 vacuum lines (that's not a joke, there are actually 76 of them!) to run those tiny, fast spinning pos hair dryers. All the extra room under the hood would allow the radiator to do something that it doesn't do on a stock FD and that is to COOL the engine. Imagine that! A stock FD can overheat in traffic in Houston in the summer. Again, that's true... and sad. I'd run the 6 speed transmission with a light aluminum flywheel. Now it will rev faster. I personally love light flywheels on the street btw but then again I'm not a wuss!

How much faster do you think the RX-8 would be if it weighed 500 lbs less? That's the kind of fun I'd be having in a Renesis powered FD! It would be in the 13's from a drag standpoint but then again I don't drag race. Those ****** don't even let you late apex the exit road!

pistonhater

No kidding. The other day I was looking at a diagram of that twin-turbo system and it gave me a headache. I'd heard it was a 'complex' system, but good lord, that thing as it came from factory was just NASA material, lol.

And I believe you; 500 fewer pounds on an RX-8 would make a significant difference. Has anybody tried that FD/RENESIS conversion yet? That would be an interesting project.

rotarygod

What's worst about those vacuum lines is that there are so many of them that they have to have them tiered in 3 different levels, one on top of the other. They are all hidden under the upper intake manifold. The FD engine compartment is terrible about retaining heat and those little rubber hoses dry out and crack very quickly. If someone wants to keep that system they absolutely must replace the lines with silicone hose. There's no other way to do it and be reliable. It's always a hose on one of the lower levels that lets go first and you are going to break others trying to get to it. I've worked on them only once. That was 1 time too many. The next time I work on an FD engine, it will be to remove that crap.

pistonhater

wow, I see. The engine bay in the RX-8 by comparison is then practically empty, LOL.

That's crazy. No wonder why so many people do the single turbo conversion - or the non-sequential conversion on the FDs. Can't even imagine how difficult it would be to diagnose turbo problems with so many hoses. Unbelievable.

rotarygod

Fortunately it's pretty well known which hoses have a problem based on how the turbos respond. The issue is getting to them.

stinksause

iTrader: (5)

Does non seq conversion help?

rotarygod

Quite a bit but it still leaves the issue of having those little turbos in there. What I mean by that is that you never know when they'll go out. I've seen very well taken care of stock turbos only last 30K miles before the oil seals start to go out. On other cars you might get twice that or more. You never know. The secondary turbo during pre-spool will hit 120,000 rpms and it's doing this at 1600*F. That's pretty hard on it.

pistonhater

So basically you would have to remove a **** load of crap - including the intake manifold - just to get to the hoses. That alone can be quite discouraging

that's a lot of speed at such temperature I hope nowadays there are better cooling systems for turbos.

I have actually seen OE FD turbos unmounted from the car. I was surprised to see how small they really were. Before I saw them I figured they were a bit bigger than what they actually are.

nycgps

iTrader: (1)

Rx-7 is a money pit, PERIOD.

Remember, the "newest" RX-7 is still 17 years old. even the older garage it all it's life and has only 30K miles (I seen one before), things WILL break, that's just how it works.

so if u want something reliable, either prepare to spend big bucks, the money I spent on my FC is more than you can imagine. But hey, when I signed the title I already know what I'm getting into

Are you ready for that ?

the 99 spec turbo made a lot of improvments (internal wise), it last longer and can get boost faster and higher. but most people either got some beat up **** from a JDM car, or just kept using the old twin turbo.

when I get a FD, I am gonna buy a new dual turbo and Radiators and 99 Spec bumpers (and its' related stuff) as my first mod.

pistonhater

so when are you going to post some pics of such FC car?

BTW, is it relatively easy to get those 99 spec parts here in the states?

xcon

i own both currently

Rx8 - 2003 6 speed , 2 tone leather interior (stock)
Rx7 - 1999 FD3S (mod came with: 19" rims & loud exhaust & BOV)

Rx8 is comfy , quiet , no rattles and squeaks , nice for long distance driving but lacking that power (that kick)

Rx7 - raw power , rowdy (big bore exhaust) , ruff n raw
Still the twin turbo setup (pain in the butt), the vac-lines(rats nest) is crazy
all mechanic's recommends single turbo is the way to go,with more room in engine for air flow

i love both.... Rx7 Saturday Drive , Rx8 Sunday Drive

here in NZ rx8 is very common now , rx7's are becoming rare

monchie

RX-7 for weekend car
RX-8 for daily driven car

Answer = both