Chevy or Audi V8?

Neither, simply because it's been done. The engine I have has to my knowledge and extensive internet research, never been put in a 986, or any other Porsche.

For that matter, it's insanely rare, period.

I want to wait until it's in the car to share the info, but I will share some hints:

1: It weighs roughly the same as an M96.
2: About twice the power, before I fettle with it. (Not doing anything crazy, but necessity dictates a custom intake, exhaust, and ECU.)
3: Not American.

Ima guess an infinity VK45DE. 'Cuz that's what I would do.
Or a Nissan KA24DETT.

ANY HINTS? ;-)


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You've got three hints already!

Okay, another hint then.

4.2 liters of displacement.

Tie that to the other hints and you might get an answer.

Audi V8????

Got the 2.7 out today. ANyone want to buy an M96 with 150k miles and a slight timing chain rattle?

Someone already guessed that!

Cadillac twin-turbo V8?

https://cdn.discordapp.com/attachmen...110_142703.jpg

In other news, got the rear of the car stripped and ready for the new engine.

Maserati Quatrtoporte 4.2 V8

Yep! I was wondering how long until someone got it.

At the moment, the engine and trans are up at a place in L.A. Found a place that specializes in custom engine/transaxle adapters.

Other than that, the engine is going to be running a full Haltech 2500 ECU. I've already de-wired the back half of the car, as it's all getting redone. Even down to the brakelight wiring, i'm just going to simplify as much as possible. Did you know there's over 50 lbs of wiring in a 986 just from the driver's seat back? That's a whoooole lot to reduce. (Hoping I can get this car to below 2400 once all this is done.)

One thing I'm very much looking forward to is that for any SCCA events I do, the car is now in XP, which has a lot less restrictions on certain things, like aero. While I absolutely love the PHAT WANG that me and my codriver made from a piece of sheet aluminum and some home depot hardware, the XP class allows for a proper wing, and quite a large one, too, as well as a splitter. Even though auto-x typically features lower speeds, some really aggressive aero can make at least some difference at 40-60 mph.

We're not going to try and get the regional championship in 2020, what with getting the car running, then getting it running right, then getting it dialed in just so, but we are going to make as sincere of an effort as possible for the 2021 season. The goal is regional championship, and do our damnest to get to nationals. It's quite a severe departure from the beginning of this thread, where I mentioned that I was doing this just for giggles and etc., but we feel like it's a possibility, so why not?

However, before any of this, we gotta get the motor in. Stay tuned.

Just curious. why did you choose the Maserati/Ferrari engine? Those are really cool motors, and sound great, even with the 180 degree crank. Was it the power, engine packaging size, or just that it's something different?

There's actually a lot that went into deciding on it. Myself and my codriver spent many, many evenings (and drinks and cigarettes) debating and researching engine choices. All in all, it's the best choice in almost every way:

1) It weighs 20 lbs less than the M96.
2) 400hp at the crank, bone stock.
3) It's about the same length and much narrower, and surprisingly not much taller. (4-5" at the top of the manifold, if i remember correctly.) As well, the location of the engine mounts makes it pretty easy to sit anywhere.
4) It's a dry sump engine. Good for racecar.
5) They're well proven to be extremely reliable engines.
6) You can pick these, a legitimate Ferrari designed and built V8, off ebay for less than $5k all day long out of wrecked/totaled Maserati QPs. They're so cheap because transmission and electrical problems led the the car itself being cheap. We truly feel like this engine is a hidden gem and will get more popular in the swap communities, especially if someone well known like Tavarish or someone of that nature (Maybe this will be OUR claim to fame) publicizes one.
7) It's a f******** Ferrari V8. How neat will that be!?!!??

So, I know i havent posted much in a while, but fear not! This project is very much active. The current hurdle, which is very nearly cleared, is the engine to transaxle adapter and custom clutch. After that, it's getting the engine in and mounted. As far as actual progress, well.....

https://i.imgur.com/wSMUKP6.png

Engine out, engine bay prepped. Found some new wheels in 5x130 bolt pattern! Some nice 3 piece units. 17x9 front and 17x11 rears. They even weight less than the BBS ones coming off. Plus, they have badass offsets that means no spacers are even needed. They're off getting cleaned and powdercoated at the moment, should be getting them back tomorrow. Pictures to follow.

The engine and trans should be getting back in the next two or three weeks, then I can start getting down and dirty with this girl.

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Finally got my new wheels back from being powdercoated!! 17x9 fronts, 17x11 rears. Don't know that actual offset, but they go on and don't rub anything except the fenders. No spacers needed. Don't have tires for the yet, will probably wait until the car is running and all. Haven't weighed them yet, but they're lighter than the 996 BBS 5 spokes on it now.

http://986forum.com/forums/uploads02...1582258050.jpg

In case you were wondering what it takes to attach an F136 to a Porsche transaxle. The whole kit was engineered and manufactured by Kennedy Engineered Products (obviously.) Now I can get down to the real work!

:cheers:

I am living vicariously on the inter webs with this build!

Gonna put some strut braces or tube the chassis?

The idea I have right now is that the engine mount is going to double as a brace. However, I made sure not to remove anything structural, so it shouldn't make much difference.

I'd at least put something from strut mount to strut mount. That bulkhead that separates the trunk from the engine compartment/interior seems quite structural.

If it were me I'd take a piece of tube steel and make a mount at the left front of the engine compartment and run it to the RR strut mount. Then reciprocate it for the LR strut mount. Then make another tube steel mount from the RR strut down to the top of the LR subframe connection (and again for the LR side). Then a final one to connect the tops of both strut mounts.

You won't gain much weight by using some small tube steel but the rigidity will help more than you can imagine.

It does look cool without the trunk. :D

Actually, I was quite surprised to find that the bulkhead itself between the trunk and engine compartment was quite thin. No way it was structural. The bottom of it, however, is quite beefy and very structural.

It seems like most of the side-to-side rigidity is provided by the lower bar (black in the above picture, kinda hard to see) and the upper crossbar (Pink, quite easy to see), as well as the two bottom bars that run across the lower suspension (Not pictured, but they're on the very bottom of the suspension).

I'm still working on the actual blueprinting for the engine mounts, but it will definitely run all the way across, and provide as much rigidity as I can without making it too complicated/heavy. I might do an additional strut tower top bar, not sure yet.

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Haven't been able to really get in the garage for a while now, mostly due to work.

We got the engine to set in place today. Blown away with how well it fits.

Extremely cool!

http://986forum.com/forums/uploads02...1597375390.jpg
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trans is back in. Not mounted, just bolted to the engine and sitting on a jack. Figured out a mounting system, and eyeballed the axle angles. Bit more than I wanted, but not too bad.

Motor's in and bolted down. The second picture shows the rear support for the transmission. All fabricated by us. If you wanna know how to mount a Ferrari F136 in a Boxster, here ya go.

http://986forum.com/forums/uploads02...1597707699.jpg
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I guess I've forgotten to update here. Gotten a lot done, too much to list. Got some pictures, though!

First up: This is the ridiculous flywheel/clucth setup to mate the F136 to the G86 trans.
http://986forum.com/forums/uploads02...1599528813.jpg


Next up: exhaust. OEM Maserati headers, 3" the rest of the way back.


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Needed to add some clearance for the axles.


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Now we're getting down to the gritty stuff. Working on the wiring is the biggest roadblock at the moment. It's nearly impossible to find the Maserati wiring diagrams so we can attach the Haltech wiring harness to all the sensors correctly.

Do upload an exhaust sound clip whenever you’re finished!

I love this thread! Haha.

Where did you possibly find a clutch and adapter for this combination?

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The clutch, flywheel setup, and adapter kit was all custom made by Kennedy Engineered Products, in central California. They do some really mind blowing stuff.

That is pretty awesome!

Man I love this! How much weight do you think you cut out?

Honestly, I don't think I cut all that much out. Maybe 20-30 lbs or so.

I’m worried about drive axle angle. It looks pretty severe, I know the LS swaps struggle with even the slightest angle, the axles fail. Is the angle as bad as it looks?

While I’m armchair quarterbacking I’m also a little worried about the transmission support you’re using. It looks like you’re using the rear muffler mount on the transmission to support the transmission / back half of the engine. The mount it’s self looks great but those aluminum posts on the transmission that hold up the exhaust are very weak. They commonly break holding just the muffler. I would think under a launch the weight of the transmission and engine along with the torque of the engine trying to rotate would easily snap the aluminum posts.

Is there an angle associated with this? I've been nervous about this in my build since the beginning (not nervous enough to stop). I figure there are ways (less than scrupulous) to fix this issue.

As for my trans I'm about an inch back from stock. I don't know if that is gonna cause any issues.

I’ve heard the general rule of thumb is 3 degrees max. The Boxster S has some axle angle so a little angle should be fine depending on how much power you have. A lowered car can get away with a little more than stock since it has less vertical angle.

Lowered car or raised trans ;)

Thats the kind of less than scrupulous redneckery I plan on doing if I have axle issues. That and moving around rear geometric things like spindle placement. I don't think I'm gonna have to do such things as my engine isn't as big as a V8, but time will tell.

At least in my case for the moment both axles fit to the gear box fine, and spin round without any binding or anything. I could only simulate what the car would be like on the road with a jack under the spindles.


EDITED:

Because my engine is still being machined I have to rely on old stock photos, but it looks like my trans is farther forward than the OP's.

Trans positioning has had me worried from the get go on this project of mine. I think the OP is gonna have his done long before I finish mine. He's just got more room to work on things :D

Maybe I’m thinking about this wrong but wouldn’t raising the trans increase the angle and make the problem worse (unless the car is very very low)?

haha; yeah you're right. I guess I didn't have my head on strait; then I thought about it. :D

I shoulda said the trans can be moved up, down, for or aft to accommodate better angles.

Hello, gentlemen! Apologies for taking so long to get back. Been busy.

Regarding the axle angle, yes, it's a bit extreme, but I'm confident it'll work. And by work, I mean it's going to obliterate the 156k mile stock axles and we get custom units that can handle the power and angle.

Regarding the transmission mounting points, we did think about the muffler mounting bolts as being a potential weak point, but I'm convinced that we'll end up with 3 1/2 neautral gears before we have to worry about the bolts on the back breaking out. Or we'll just snap the whole case in half. Whatever comes first.

In other news, the engine cranked over for the first time last night. Didn't fire, as there's still no tuning or anything to the ECU. but it showed signs of life.


She's nearly ready to rumble.

dooood..... sittring ont he edge of my chair here.

When you fire it the first time, you'd better post that video!!! ;-)