adding turbos to a 3.2

[Catorce]

Twin turbos is not the way to go on these older flat 6 motors. What you want is a single TWIN SCROLL turbo.

[Tippy]

Originally Posted by Catorce

Twin turbos is not the way to go on these older flat 6 motors. What you want is a single TWIN SCROLL turbo.

I disagree. Eddie Bello made over 1100-1200whp with twin GT35R’s on a 3.6.

Would he have made the same with a 88-96mm turbo? Maybe, but they’re hard to spool when that big with our little motors.

[Catorce]

Originally Posted by Tippy

I disagree. Eddie Bello made over 1100-1200whp with twin GT35R’s on a 3.6.

Would he have made the same with a 88-96mm turbo? Maybe, but they’re hard to spool when that big with our little motors.

Are you comparing a 75K build versus a guy wanting to add a couple turbos or a single turbo to an existing motor?

Your example is the fastest 964 probably on the planet. Wow. Let's talk about UGR Lamborghinis.

A single twin scroll turbo will get you most of the way to TT power levels with a tiny fraction of the expense.

[tocobill]

IF your going to do it there is a set of 993 turbos, headers, and engine mount for sale right now pretty cheap. All ready fit to a 3.2 ... just need to get piece together the oil returns and intake and tune.

[Tremelune]

Doesn't a 3.2 need more than just a turbo slapped on? Stronger...internals? Lower compression or something? How much can you boost this thing and not have to rebuild it every 50k miles?

I'm stock in the land of smog checks, but I dare to dream...

So like, here's some threads...$3-5k for 300 whp seems pretty sweet, if motor longevity isn't compromised.

https://rennlist.com/forums/911-forum/667080-carrera-3-2-n-a-to-turbo-conversion-how-to.html

I want to turbo my 3.2L carrera

Very custom. Very involved. Very interesting.

[spence88mph]

Originally Posted by Tremelune

Doesn't a 3.2 need more than just a turbo slapped on? Stronger...internals? Lower compression or something? How much can you boost this thing and not have to rebuild it every 50k miles?

I'm stock in the land of smog checks, but I dare to dream...

So like, here's some threads...$3-5k for 300 whp seems pretty sweet, if motor longevity isn't compromised.

https://rennlist.com/forums/911-forum/667080-carrera-3-2-n-a-to-turbo-conversion-how-to.html

I want to turbo my 3.2L carrera

Very custom. Very involved. Very interesting.

I did it myself with all off the shelf parts, in my mom's garage. Nothing custom except for a oil like from the sender to the turbo, it made 320 hp at the wheel wheels on 0.5bar 7psi back then no turbo. I based it around Protomotive's learnings on boost levels and requirements and used their chip, RRFPR and change pipe. All up I think it cost me about 3K US.

It's run it like that since 2008, I did a rebuild months ago after a couple of leaks and some smoke, the engine had never been apart. All that was discovered was 2 valve guides that needed replacing. Everything else inside including piston and barrels looked new.

Remember the bottom end is pretty much the same as a 930, crank and conrods, the 3.2 benefits though with much better flowing heads and intake manifold. A 3.2 will make a lot more power at the same boost levels than a 930. I use a small ball bearing GT30R turbo.

The car is so much better to drive than a standard 3.2 IMO in every way, whereever a 3.2 has power it has it plus more, no compromises, it's night and day. I went down the path of changing mufflers, chips, headers, they really do very little, sounds is about all you achieve there. I have a stock and turbo 3.2 in my garage to remind me of life without power.

[Tremelune]

Well hell. Does it weigh more than a stock 3.6...?

Man, this site is the opposite of Buddhism...Now I need to find a '75 car I can blow up...

[Rodsrsr]

Same here.... very similar setup as Spence. Precision turbo .5 bar with stock compression, Headers, outlaw muffler, web 20/21 grind cams and a MAF. Not sure about the weight of the 3.6 transplant cars. I only know they dont stand a chance.

[FstTarga]

I can get exact numbers on any weight added with my set up in a day or 2. All I can say, is all I added was a turbo, intercooler, blowoff valve, and wastegate.
Otherwise it’s stock. So I’d guess it’s maybe 60+-10 pounds I dk what a 3.6 weighs

[spence88mph]

Originally Posted by Rodsrsr

Same here.... very similar setup as Spence. Precision turbo .5 bar with stock compression, Headers, outlaw muffler, web 20/21 grind cams and a MAF. Not sure about the weight of the 3.6 transplant cars. I only know they dont stand a chance.

Wow cool you’ve gone further than me! Yep a stock 3.6 conversion wouldn’t touch the power. Racing a friends 993 vario, it really wasn’t a race, by the top of 2nd gear the turbo 3.2 is ahead by about 5 car lengths. What I like the most is the torque and power lower in the rev range, you don’t have to rev them to make power when you have boost, the 3.2 is so ordinary NA below 4500rpm.

[Raceboy]

People tend to think that highly built 300 hp n/a is fast until they are reminded by some boosted but otherwise stock 911

[Catorce]

Originally Posted by Raceboy

People tend to think that highly built 300 hp n/a is fast until they are reminded by some boosted but otherwise stock 911

Of course then there is this - the fully built 3.3 turbo. I built this motor for my turbo targa. Twin plug, giant twin scroll turbo, full width intercooler, CP rods and pistons, EFI, AEM Infinity, all the bells and whistles.

Approx 600HP in a 2600HP car. Should be nuts.

[Trackrash]

Originally Posted by Catorce

Of course then there is this - the fully built 3.3 turbo. I built this motor for my turbo targa. Twin plug, giant twin scroll turbo, full width intercooler, CP rods and pistons, EFI, AEM Infinity, all the bells and whistles.

Approx 600HP in a 2600HP car. Should be nuts.

Can't wait to see when this project is done.

[Jgordon]

Originally Posted by spence88mph

I did it myself with all off the shelf parts, in my mom's garage. Nothing custom except for a oil like from the sender to the turbo, it made 320 hp at the wheel wheels on 0.5bar 7psi back then no turbo. I based it around Protomotive's learnings on boost levels and requirements and used their chip, RRFPR and change pipe. All up I think it cost me about 3K US.

It's run it like that since 2008, I did a rebuild months ago after a couple of leaks and some smoke, the engine had never been apart. All that was discovered was 2 valve guides that needed replacing. Everything else inside including piston and barrels looked new.

Remember the bottom end is pretty much the same as a 930, crank and conrods, the 3.2 benefits though with much better flowing heads and intake manifold. A 3.2 will make a lot more power at the same boost levels than a 930. I use a small ball bearing GT30R turbo.

The car is so much better to drive than a standard 3.2 IMO in every way, whereever a 3.2 has power it has it plus more, no compromises, it's night and day. I went down the path of changing mufflers, chips, headers, they really do very little, sounds is about all you achieve there. I have a stock and turbo 3.2 in my garage to remind me of life without power.

Your craftsmanship aside, there are few cars sexier than a widebodied, non-tailed 911.

[Tremelune]

Agreed. Plus, 300hp and air conditioning...

Anyone can build a hot rod. It's tough to increase performance while keeping the balance of a daily driver.

[Lukesportsman]

Ive been side tracked by my water cooled turbos, though I'm doing a 71' build now so I haven't got the turbo project running. BUT a few thoughts.

Yes a Modern ceramic bearing twin scroll is likely the best bang for the buck.

Sure you can use 993 manifolds, but remember to flip the flanges. I am using NA 993 manifolds to put turbos near back corner.

I'm using GT28's with 996 IC's and the 3.2 intake with 3.2 heads on 3.3 P&C's.

With a hot rod, the final specs and outcomes are rated in more than pure performance numbers OR you'd never see a T bucket or a Harley built up. Its for the challenge, the cool factor and some times just for the "so it can't be done".

I'm still on fence of using a G50 or something different.

IF you want twins, then just plan to spend a little more. I see the limiting factor to be a factor of combustion chamber, heat dispersion and the problem with too much boost at low rpm's. These are all corrected for with water, but then you get the water pump and all that goes with it. Cheers

[Tippy]

Originally Posted by Catorce

Are you comparing a 75K build versus a guy wanting to add a couple turbos or a single turbo to an existing motor?

Your example is the fastest 964 probably on the planet. Wow. Let's talk about UGR Lamborghinis.

A single twin scroll turbo will get you most of the way to TT power levels with a tiny fraction of the expense.

You didn’t mention expensive, hence my post.