What V6 engine for 911?
 

Hi,

I have seen some amazing 911 V8 engine conversions but never seen a V6 into a 911.
If you wanted to put a V6 into your 911 what engine you would go for?

Many Thanks!

I'd go with a cayenne V6, that way it would still say Porsche on it :D

4.3l?
 

I have been toying with the idea of a GM 4.3l V6. They are plentiful and cheap, decent torque and HQ and I believe they have a similar bolt pattern as a 350. Let me know what you find out.

Seems like a lot of trouble to mount a heavy iron-block pushrod engine? The GM 4.3 ain't that great, I worked on a few of them. Ford Taurus SHO would be my vote:

http://forums.pelicanparts.com/porsche-engine-conversion-tech-forum/543187-928-transaxle-ford-chevy-small-block-mid-engine-bug-idea.html

This may sound strange but the Alfa Romeo V6 Good HP and the most wonderful sound ever!

No.

+1

911 flat six is way too sweet sounding to ever make me remove one for the motor out of a blazer

You will understand if I am a little confused and also very interested in your LS conversion. Were you against the V6 conversion?

Yeah. Theres no point doing a v6. I cant think of a cost effective aluminum v6 that makes any sense. Ay of the better ones use double overhead cams like the afirementioned alfa. That means that you're better off doing an ls conversion. The engine is lighter than any of the iron v6's and it makes more power and torque than anything really.

The main reason people pan the ls engine is because its a pushrod design. However, this is the main design feature that makes it attractive to anyone doing an engine swap. Its tiny comared to anything else. And, the lushrods dont seem to limit the engines performance in any material way. Chevy abosultely did the right thing by ignoring the european manufactueres and sticking
With the pushrod design.

Now, there are two other engines that are interesting to me. First is the subaru turbo 4 cylinder. It makes a ton of power and is extremely light. The second is the turbo rotary wich is more powerful and lighter still.

I have seen conversions with both but not driven themso if you do that be sure to bring it to houston.

Hal

Sorry for the misspellings. I cant seem to type on my ipad yet.:)

I have done a Subaru conversion on a 912 and now I am in fact squeezing an Audi 2.8 with an Eaton supercharger in another 912. I will agree with you that the LS engine is the better choice for such a conversion but once I get started with these projects I can't stop.

That's a couple really cool projects. I love that little suby motor. It would be perfect in a 912. Are you doing the rgruppe treatment to the rest of the car?

I considered Audi engines. That's sort of in the family. I'd be interested to hear how it turns out. It's a bigger motor, physically, than an LS isn't it?

H

GM v6 dohc all aluminum?
 

I have a "junk" dohc v6 from a late GM product, don't remember which car, but it is the same basic unit as the new Camaro. I haven't weighed it yet, its all aluminum, the 4 valve heads and dohc are interesting. In the Camaro it is direct injected and 300 hp, I anticipate there will be lots of hot rod modifications available, and lots in the junk yards as kids get in trouble. So maybe a relatively cheap motor with lots of upgrades, short length, dohc, all aluminum, I just need to weigh it. Kennedy confirms it is the same adapter as the other late GM v6's.

I am planning to try it in a 914 and keep the 901 trans.

Regards.

Interesting. Post pics, please.

With the "early" modern Maserati's being scrapped so cheaply, (I acknowledge the difficulty)but it would be humorous........

Ferrari powered Porsche :D

Your close, but it is not V6, it is H6. Subaru H6, also known as EZ36D. About 260hp., all aluminum and 100-150 pounds less than a 964 3.6 engine. Now that would be a great project!!!

Lot of trouble for only 260 hp.

What does it cost to put in a 993 or 964 3.6? $15,000 to $20,000? What are you going to get on a stock engine? 250 to 280hp? That is the most desirable route, but a lot of trouble or cash to get "only 260 hp".

If anybody has any links to a Subie install, I'd appreciate it. Considering this for my 912E.

There was a beautiful one done on here a few years back with really good engineering. I think it eventually sold for a big loss. It was a neat idea for a daily driver, but trouble/hp/cost ratio hard to figure over a 3.2 or LS depending on how ratio lends itself to your needs.

http://forums.pelicanparts.com/porsche-911-technical-forum/357151-putting-3-3-my-sc.html

I remember that one! Very cool. Even considered it when it went up for sale. Kinda curious about 4-cylinder conversions to save weight / fuel efficiency. But I like the flat six parallels. :)

I vaguely recall the grand national turbo 3.8 v6 being a swap option. IIRC, in stock form that motor put out 275hp...

renegadehybrids.com has kits for LS and small blk conversions and subie conversions. Im currently work for Ls conversion, I have not ruled our V6 yet just have not found motor yet that meets my criteria. i have a wrx it kicks ass but I want my 911 to be faster than wrx. right now subie kicks its butt.

Fords new 3.7L would be awesome. All aluminum, 7K RPM from factory, 300 HP, and 31 MPG in my son's mustang. They are fast and sound great. I have the same motor in my truck, great motor - smooth, quick, quite. Would need a good electrical person to do the swap.

Or an 3.5 L twin turbo ecoboost - 365HP 425ft lbs torque.

Vr6 turbo... cheap, reliable, easy to work on... powerful.

Both of those ar heavier, taller and more exepnsive to acquire and modify than an LS. And the conversion cost would be the same. LS still wins.

I can't say that the LSx doesnt win, but the 3.7 Ford and 3.6 Chevy engines are great and LIGHT. I think the 3.6 is listed at 375lbs with 300hp. Easier packaging in rear in regards to space/weight. Don't believe any of the FI engines are struggling with height. Have been researching these exact engines for an MGBGT swap. Thought the snappy lower torque nature might fit the character of it better than a torque monster. If your building a small tired car, you don't need a LSx engine.

Ls engine is a great engine but if you're into keepin Germans speaking German then the VR6 with a turbo is the way to go. The generic American v6 engines are okay but you're a smidge away from driving a grand caravan or grand am.

While looking for the weight of the Duratec V6 I just read the V12 version of that technology (Duratec) is the basis for the Austin Martin line.. Not too shabby.

The B may be different, but you're going to have a height problem with anything overhead valve in the P car. It's easy enough to get around that with a different choice of decklid and wing but the main thing is I wouldn't waste the money.

Essentially, since the bulk of the cost is in the conversion and not the engine, you're shorting yourself 100-150 horsepower. And "snappier nature of the torque" is just silly. LS engines can easily make twice as much torque as a VR6 or any of those other v6's. And it's torque that moves you.

The other thing people don't realize is that there is a huge difference between peak horsepower/peak torque and what I'll call area under the curve. A VR6 engine, in particular, is a great little motor. It spins great, sounds great and it's a smallish package. But go look at the horsepower and torque curves. An LS engine makes more horsepower and torque everywhere - from idle through redline. When you sum up all that horsepower, it's a LOT more powerful than the VW. And, you can feel that power everywhere - there's an immediacy these v8 cars have that you'll lose. It'll feel more laggy and lazier, like the flat 6 you took out of it.

And the LS engine weighs about 350lbs, too. I'm telling you, you guys don't realize how tiny the LS package is.

Here's a picture.

http://forums.pelicanparts.com/uploa...1359382744.jpg

And, that LS engine has a deep sump oilpan on it. The one most people choose is 3" shorter.

Hal

No offense but it is painfully clear you've never owned, driven or researched VR6 turbos. This mindset is exactly the type of driver I enjoy roasting in their "muscle" car out of the toll booths as they're completely clueless and unsuspecting.Stock vr6 with turbo handles ~600hp. Add pistons and rods and you're about 1000hp capable.

The LS is a great engine but not the easiest to work on and not the cheapest to modify for power. Right out of the box in stock trim it is superior to the VR6 when also in stock trim. BUT, cap your spending on engine and performance adders (non-refillables) at $6g and you have a 600hp vr6 and a mostly stock 400hp LS if you find a decent specimen that isn't beat to death already.

...And if you want a Porsche VR6 they exist in the Cayenne.

Some education... love the street golf driving around the Camaro popping the wheelie out of the hole. That golf is stock block, big cams with the turbo.

https://www.youtube.com/watch?v=sFj9d6N8bfg

There are all kinds of neat ideas for awesome engine conversions. Proven is always good and the LSx has been a proven conversion with parts readily available. If that does not float your boat, for the same hp as a 3.6 engine, the Suby has some great flat 6 engines that Porsche did the consulting for. The ez30r 3.0 liter 250hp. or the ez36d for closer to 260 with improved torque. Both the Suby flat 6 engines weigh 100-150lbs less than the 964 3.6 or the LSx engine.

If I had a 911 roller and could not afford to put a good Porsche flat 6 engine, I would go with the Suby for sure.

I have always wanted to do a rotary engine in a 911.

The V6 is why the early maseratis are scrapped so cheaply!! It'd be a rear engined failboat.

If people were desperate to fit a V6 into a Porsche, I'd go with the Mazda KLZ (and turbos), or the Honda or Suzuki engines (alloy, relatively light and good power) or the Mitsubishi 3.8L V6. Audi make a great V6 but they are expensive to maintain and aftermarket is minimal.

However, I'd never do it to a 911. Why would you? LS1 ticks all the boxes and then some, and would be cheaper to convert on account of the vast amount of aftermarket support.

Having said that, the perfect candidate for a V6 conversion would have to be the early boxster. LS1 doesn't fit, and Subaru engines sound like arse.

I realize Im late to the conversation, but I had a couple comments. The only reason I would put a V6 in a porsche is if I was building it for my 16 y/o daughter (she wishes) and didnt want her to kill herself or have to put up the stock flat 6. Not sure which would be worse. If I was looking for something in the 300hp class, with a little less torque so that the stock 915 stays alive, and 30+ mpg Id run a LSX 4.8. easy 300-350 hp, revs to 7 all day, and you dont have to baby the tranny. Oh, and the mileage would be so good you use it for your daily and your wife would approve. Not only that, but if you later did a widebody with 345s, and needed a bit more, you could build that same block up to 383 (6.2) fairly easily.

If you're looking at a turbo VR6, then why not in a 914 and run the VW transaxle and eliminate the more expensive P parts? I realize this is requiring a re-engineering of trailing links, but a 914 isn't stellar do to its sophisticated rear suspension but more in spite of it.

Yes I have a 914 conversion, so not ranting on it at all.

Unless the 4 is N/A it won't save fuel. Weight savings is also not that great. The current EZ30 is with in 50lbs of the EJ25's and makes 245hp.

The 3.3 is a relatively old design and would not be desirable for any swap today.

<iframe width="560" height="315" src="//www.youtube.com/embed/jUWBlko2RzQ" frameborder="0" allowfullscreen></iframe>

personally for my 930 i was leaning toward higher horsepower and went with a mast motorsports ls7 drive by wire motor. small, compact, and lightweight for 700 crank horsepower with 600 plus ft/lbs torque. and it makes horsepower throughout its rpm range...i never considered a 6 cylinder for the porsche. however, i have a v8 converted 63 austin-healey that i am considering converting to a v6. so i do find this discussion of considerable interest...http://forums.pelicanparts.com/uploa...1403184149.jpg
http://forums.pelicanparts.com/uploa...1403184194.jpg

Hello all,

Sorry to "hijack" or resurrect this conversation but almost 10 years has passed bye and now we have 300 hp, all aluminum GM V6. Cost will be cheaper for a good used low mileage engine. It should be less weight than a LS1. I have a 912 with the 901 5 speed so 300 hp should be my limit plus these engines are fairly reliable.
Has anyone has researched this or gave it some thought?