andy-gts1

I still think the amg gt (mercedes) is the progression of the 928......

wopfe

The engine is going to be tested soon I think: Looks good!

hacker-pschorr

The collector car world has gone bonkers. I recall people gasping when big block chevy's started to regularly reach six figures. Now nobody bats an eye when an L88 Vette hits half a million.
When Singer hit the scene people laughed at the idea of a quarter to half a million 911 retro-rod, now look where they are. Will this translate to the 928 world? I sure hope so.

I've been pondering that, weight will be one big factor IMO. Are all the proposed changes going to add or subtract weight? The 928 is a lightweight by today's standards.

The 2023 Aston Martin V8 Vantage has 503hp but it weighs 3,700lbs. To have the same power to weight ratio, a 928 only needs to make 475hp.
https://www.astonmartin.com/en-us/mo...ntage-v8-coupe
The 2024 Mercedes-AMG GT is a hefty 4,340lbs. So even though it has 577hp, again to account for the weight a 928S4 would only need 465hp to be comparable
https://www.roadandtrack.com/news/a4...amg-gt-weight/
https://www.caranddriver.com/news/a4...oupe-revealed/

Singer 911's make 375-400hp but they only weigh 2,500lbs or so.

Meatful

What would be the most likely--and most reliable and serviceable--way for Nardone to get to 400hp?

928cs

Where are the water and oil pumps of this engine?

hacker-pschorr

In the high performance world, adding 85hp to an N/A engine is very easy. The right camshaft, intake, exhaust and a good set of heads gets you 100+ on an LS engine. A good set of heads for that platform is a stock head with a very mild port job. The 243/799 LS head is so plentiful I was just given a set for free to use on my 6.0 Denali. With this head, a boneyard intake from a different truck engine, stage 1 cam, and a set of headers should take this engine from 320hp to close to 500hp.

The achilles heel of the 928 engine is the intake manifold, and it looks like they are already have that figured out. I'm going to assume custom camshafts and it wouldn't surprise me to see them running four cam gears to independently adjust cam timing (it looks like the stock water pump is eliminated). A good exhaust isn't really rocket science. 11:1 or higher compression is plausible as well.
From there a good ECU like Motec and rev it to 7,000rpm.

Actually I'd be surprised if this engine only makes 400hp.

Let's not forget a 5.0 making over 400 crank horsepower has already been done, and the intake used here was not designed for this displacement, yet still gained 39hp / 23TQ:
https://rennlist.com/forums/928-foru...l#post10867655
If this engine were taken to 7k, I'm sure it would have squeaked out a few more ponies.

Constantine

Good discussions.

They must have eliminated the standard water pump (and good for them) since Nardone said they shortened the timing belt. Wonder if they will go with an electric set up.

To me it's all about the balance of the car and usable street perfomance. HP numbers are mainly for bragging rights, TQ is where it's at for effortless cruising and traffic negotiation. This 928 is being kept to its initial design as a GT, not a track toy.

Looking forward to more details as they develop the formula.

hacker-pschorr

Judging by the length of those intake runners I don't think this engine will have any shortage of torque. In the endless debate of HP vs TQ, reality is you need both in a performance car otherwise we'd be seeing diesel powered Lamborghini's.

MattiasH

They have designed a new water bridge to use with an electric water pump and made a plate to cover up where the old one was. I haven't read anything about the oil pump. Maybe going for a dry sump setup?

Constantine

Great they decided to remove the water pump from being run by the timing belt and decided on an electric water pump solution. The water pumps were the cause of timing belt failures with some catastrophic results.

A dry sump oil system would be another plus.

Hopefully the engine builder knows about the 2/6 rod bearing failures of the original 928 engine design and figures out the correct drilling of their chosen crankshaft to ensure proper oiling of the rod bearings.

Larson E. Rapp

Honestly, if I were going to put a 928 through surgery this radical, I'd probably electrify it.

It's not a 928 anymore, for better or worse. That ship sailed when they ripped out the binnacle and redid the interior in Tesla chic. Why stop halfway?

throttlegrotto

IMO (and take it as my opinion) Anything they're doing is well out of 99.9% members here's financial reach. And if you love these cars, then it's a great thing. Because just like the 911, it will spawn more people to enter the arena.
And maybe someone else will come along and do a restomod more in 'your' style, and you'll pick up some cool parts. Or someone new will be interested in the platform, and make cool stuff for it. And you have to do some modern things to the car to get modern people with modern money to pony up and be interested.
Before Nardone entered the ring, with the exception of the GTS models, the 928 was largely forgotten outside of the core community. You see tons of 911s for every one 928 in the wild. 911's have long been the 'true' enthusiast Porsche, and the rest are just brand support. I think outside of the one (okay, two) I have, I've seen 2 or 3 total in the past year. I see that many 911's in a week during the winter.
I think the rising tide anecdote applies, even if you don't like what he's doing, he's doing a singer-esque job of it, and it's going to motivate people to compete in the arena. And we'll all get better parts and support because of it.
Take it for what it's worth, I'm just a chump hackjob youtuber restoring stuff in his garage, trying to have fun with cars. The 928 was the 911 I could afford with what money I could scrape together to try and get a scrap of that Porsche algorithm attention. Thanks to Nardone, Jay Read, and others, that small slice of people interested in the 928 is growing.

Bigfoot928

the deck plates are interesting, along with cooling rings around the lined cylinders which is interesting as I went that route about 15 years ago. The question is are they wet liners? What would be really interesting is if they went to a serpentine belt system for the accessories.

Anyone else notice the large water tube going thru the housing into the V?

Cheburator

The engineering/design entities involved in this project know more about their respective subjects than probably the whole of Rennlist put together... I hope the project is finished and brings more interest and attention to our cars...

Vilhuer

Engine dyno testing.