Project Zero G Forums

rarson

That car makes me want another 7.

Any chance you could give us an in-car video?

rarson

As far as that flange adapter goes, all you need to do is go to emachineshop.com and make a CAD drawing of it. They'll machine it and send it out to you.

I've never used their service before, but it seems incredibly convenient for parts like this.

rarson

One of the guys on the DSMLink board posted a ton of pictures for a swap he did (actually, I believe he's still putting finishing touches on the car). He did everything... even swapping the car to RHD.

It's an awesome car, but personally I can't really get that excited about it because of the sheer ...

rarson

emachineshop.com says they do castings. They even list engine blocks as an example. You would have to download their software (free) and design it yourself. I have no idea what their prices are like, but if they are reasonable, then it's probably the best bet for a top-mount cast manifold.

I think ...

rarson

Wow. I knew ebay had some good deals on Nascar parts (rods especially) but I had no idea there were titanium valves available too.

rarson

Like DJ said, I'm pretty sure solid lifters would be a must above around 9k. That would be my biggest concern. I also think the stock-sized valves would probably work better, as with high rpms, velocity is the name of the game.

As far as cams go, I'm not sure whether the solid lifters would require ...

rarson

But seriously guys, what is wrong with taking FRH manifolds and flipping them around? They might not be the best manifolds for the DSMs, but they make such an easy RWD option!

Yeah, that's what I was thinking. I mean, from what I remember, they make pretty good numbers and are easy to flip.

I'm ...

rarson

HOWEVER, there are a MILLION improvements that could also be made through R&D

Yeah, I agree. I'm just saying, for what they are, they do work pretty well, a lot better than I was expecting.

What do you guys think of the Forrester Racing Heads cast manifold? At least with that one, you can put ...

rarson

In defense of the Magnus manifold, I drove a friend's 2g Eclipse with it and the driveability was fantastic. It was actually better than my small 16g with cams, but he was running a Hahn Super20g, stock cams, and I believe a 2g TB (I'm running a 1g). My car was quite a bit faster than his, so it ...

rarson

If you want to proof what this engine can do there are dozens of DSM sites around to do some research and many people running sub 12 second daily drivers.

Yeah, to reference what DJ said, my own daily driver 2G Eclipse runs 11.9x with no internal mods except for cams (still running the original ...

rarson

Matt, maybe you can chime in since I have no experience with drifting...

But it seems to me that there is a dichotomy between the FC3S RX-7 and the S13 240SX. Whereas the S13 is a good drift machine with it's weight further towards it's ends, the FC3S seems to be a better grip machine, with it's ...

rarson

Is the RX-7 tranny a TII tranny? Because even if you wanted to use the weak N/A tranny, the bellhousing isn't detachable like the TII tranny.

Though I'm assuming if you've looked into it already, you already know this. I've got 2 N/A trannies sitting around, I'm not sure I really want to use 'em ...

rarson

DJ, what kind of cams do you have?

I agree with Leon. The "X" cams are supposed to have really aggressive ramp profiles. If FP says they require them, then I believe them. They aren't the type of people to suggest unneeded parts.

rarson

You're talking about oil squirters versus wrist pin oiling, no? Aren't they two different things?

rarson

I know this is a bit after the fact to ask, but Mike, about the cam gears. I thought the Galant cam gears were the same as the 2.0 gears except that the key was half a tooth off? In other words, with a set of adjustable cam gears one could move them half a tooth and essentially have the stock 2.4L ...

rarson

Ah, I get it. So you are saying to block the holes but not completely, and thus drilling a small hole through the allen screw. I understand now, the reduction in flow through the holes will cause coolant flow to be reversed through the head.

rarson

What about expansion of the different metals? Wouldn't the aluminum head and steel allen screw create issues when the engine warmed up?

I don't quite follow what you mean by "drill a small hole through the allen bolt so no air pockets form."

Thanks for the info though, this is some good stuff!

rarson

Anything with a T25 is no beast!

rarson

I didn't see it mentioned, but I'm pretty sure solid lifters would be a must for 11k rpm. I'm not sure, ask Shep since he's almost there.

rarson

Yeah, "FB" isn't really a factory code, it's just a common moniker for the car (only in North America, where a shorter code was needed for the VIN). The real code for the first gen RX-7 is SA22C (probably to do with the "Savanna" brand that Mazda sold them as).

Anyway, aside from what Mike ...

rarson

So, your first point is reversion, right? It is easier for air to get in and thus easier for air to get out (the very reason why DOHC engines typically breathe better at high rpms and produce less torque at lower rpms) and making the valves bigger would hurt this, right? Well, I pretty much agree ...

rarson

DSM guys argued this point over and over for years. There were always the guys out there that said "oh a 2.4 will never be as good as the 2.0, its not a square engine, rod ratio is bad, etc etc."

Right, Mike, I completely agree. I wasn't arguing for one being better than the other. I simply think ...

rarson

Right, but the difference will probably be negligible unless he bores and/or sleeves the block to get some significant increase. And if he's running the larger 1g ports, I think he might be better off with the smaller bore.

rarson

If you're keeping it 2.0L, you don't need the 2.4L block. The 4g63 already has a pretty rev-happy stroke and 1.7 R/S ratio. The extra 6 or 12 mm of rod length would be a bit overkill... though if the engine LIVES at 10k and above, you will likely have better engine geometry for that rev range. If ...

rarson

DJ, I didn't see which clutch you said you used, was it for the Starion? Is there any pilot bearing issue with using the Starion stuff on the RX7 tranny?

rarson

I thought I'd update you guys on my situation.

I found out that I am getting out of the Navy early for a medical discharge, which means that my RX-7 will be shipping out in early June. Not a big deal except it's completely DISMANTLED. There's no wiring at all in the car right now, and the stock ...

rarson

Right. Smaller ports can flow almost as well as large ports but with greater velocity, which is my goal. The extra mixing caused by that should also help improve combustion "quality." At the very least, with the smaller ports there is more flexibility to control the size of the ports from as small ...

rarson

Hehe, crazy huh? Well, I prefer to think of it as "outside the box" but I don't blame you.

The reason I want to sleeve a 2.4L is because LA Sleeves makes good sleeves for cheap, and because I want to offset-bore the block. Actually, it probably could be done without the sleeves. But the sleeves are ...

rarson

I think the RX7 tranny should hold the power you're looking at. Really, that's one of the things in a TII that don't need to be upgraded.

The TII tranny is even stronger than the FD tranny. And if it breaks, there's always the $$Guru dogbox$$.

rarson

Just to add, in case anyone didn't know, the bellhousing on these trannies is not detachable.

It's okay though, they wouldn't withstand the power anyway. They're pretty weak.

rarson

Well, I was thinking about doing this a while back with my project RX-7. However, it kind of stalled and I was on track to building up the rotary.

However, I'm getting out of the Navy soon and I need to get the car back together to ship it back to the states. And now I'm thinking I might want to go ...

rarson

Wiseco can customize the pistons any way you like. If you want to move the wrist pin up into the oil ring, they'll do it.

rarson

The difference between the 1g and 2g rods are the wrist pin size. The 1g is 21mm while the 2g is 22mm. Also, the 1g "big" rods are a tenth of an inch thicker at the crank end. The rods of the 1g and 2g 4g63's are the same as the rods for the 1g and 2g 4g64's, respectively, 150mm long.

rarson

Ah, okay. Should be interesting to see how well the cams work for you.

Nice project. I really want to get mine going but I have some other things to worry about right now. There is a Savanna RX-7 Infini III sitting in a lot that I'm itching to get my hands on, but I'm going to have to wait a ...

rarson

Ah, I get it. "This next shot shows through the rear radiator ducting straight through the firewall and out the front of the engine bay" That's what confused me.

I know from the drawing it looks like the diff would be in the way, but it's not. It looks that way because the crappy freehand approach ...

rarson

Awesome, I love DSMLink.

Showing my ignorance here, but what year is that? Looks almost like an RX-3 to me. I love the old-school imports.

How come you forgoed the cam gears?

rarson

If using a D50 transmission, why not get a 2.4L block and run a 2.1L non-turbo? Or even a long-rod 2.4L will rev very well. I think you could make some very decent naturally-aspirated horsepower with a 2.4L. In either case, I would recommend a 2g head for a naturally-aspirated engine due to the ...

rarson

Hey, here's some feedback about a few things I noticed when checking out your pages.

First of all, looks great. Thanks for this site because it's a really good source of info. The swap basics engines page doesn't show me any pictures. The text alludes to some, but I don't see any. Also, the Sirius ...

rarson

Here is the picture.

rarson

What tranny are you going to use in the 240? I thought the KA tranny wasn't up to the task of handling a turbocharged motor?

rarson

</div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td> QUOTE (slowquest @ Aug 6 2005, 06:17 PM)</td></tr><tr><td id='QUOTE'>You're saying that the blue regions in that graph are low-negative ...

rarson

Have you gotten a picture yet? I might like to pick one up if it's verified to be the right pattern.

rarson

smog brings up a good point! A good way to help ensure your motor doesn't walk is to not place that pressure on the crank when oiling is low (or non-existant, such as startup). I never leave my foot on the clutch at stop lights, always go into neutral. I think even just that will greatly reduce ...

rarson

</div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td> QUOTE (4GFC @ Jun 20 2005, 10:46 PM)</td></tr><tr><td id='QUOTE'> Well your brother don't know shit about TII transmissions. They are the same as ...

rarson

I'd buy one, but being in Guam, shipping is a big deal. It's quite a bit more expensive and takes forever for stuff to get here. I got lucky and now there's a guy parting out a TII, so if I can get him to give me a good deal, I'll just do that.

rarson

I agree. Every rotary person I've ever talked to has always said that the TII tranny was the strongest tranny Mazda's ever put in an RX7, including the third-gen. I know the TII guys don't even think about upgrading their boxes at least until the 10-second range. In my opinion, it seems that these ...

rarson

The TII stuff is bolt-in. It's made for the chassis. Plus there are guys running sub 10-second passes on stock TII stuff. I think it's strong enough for me.

rarson

I'd like him to make me one big enough to fit a Q45 TB.

rarson

I believe the TII pilot bearing isn't pressed into the flywheel. I'm not positive on that though.

I did find a 10.5 lb Fidanza for the Starion.

rarson

Awesome, so the Starion flywheel will bolt right to the 4g64 crank? Does anyone make a lightweight flywheel for the Starion? I don't have to have an insanely light flywheel but I really don't want a heavy one either and I'm not hot about lightening stock flywheels. I love the increased effect on ...

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