It seems from everything I read on here that the V6 is stuck at 450 hp because there is nothing else that we can do that will add power. From what I read here, intakes don't increase HP, so I would assume that high flow cats and better exhaust don't either. I am in the process of having some cylinder heads ported and polished and having the exhaust and intake valves increased in diameter by 1mm as what was recommended. I am having the supercharger snout also ported and polished, but I am guessing outside of that, only nitrous system will do the trick?

Has anyone broken the 500 HP barrier with a V6?


TIA,
Danny

 

Forum member FType17 has built a 640 hp V6 called "Vengeance".
I think you can buy a kit from his company (STP Tuning) to achieve much the same result but it ain't cheap, see here: http://stptuning.com

 

I approached him at one point about building one for me. He seemed a bit standoffish about doing so, making it sound like it wasn’t particularly suited for street use.

 

"Full suspension upgrade, transmission upgrade to 900Nm, engine pull, bore to 3.4L , deck honed, heads rework, new engine internals with titanium rods, water/meth injection on larger supercharger, new headers, new midpipes, new rear exhaust, new custom ultralight forged wheels covers most of the upgrade package."

Not really even close to a stock V6 F-Type.

 

The Alpha Romero Quadrifoglio V-6, 2.9L, puts out 505 HP according to their ads.

 

Is Alpha Cesar’s brother?

 

You're quite the Joker.

 

Moi?

 

Such a Joker.

 

I didn't think there was a larger super charger available. That would be my first step after porting and polishing these heads.

 

Yes, i read that, so our V6 engines should be able to do it as well. Just a lack of parts, I suppose.

 

Well, to be accurate it's an Alfa Romeo (thanks for pointing out my mistake, somebody); but my understanding is that Alfa's 2.9 is essentially the Ferrari/Maserati 3.0 with less cylinder bore to strengthen the engine in order to handle the added power. It would seem therefore that pushing the power too high may lead to engine failure.

 

The V6 uses a TVS R1320. The next one up is a TVS R1740. The V8 uses a TVS R1900.

 

I recall someone here that has some inside information noting that to get that power the "boosted the **** out of it." More boost, more power, more potential problems. Really high pressures require mechanical support. If the block is of the "wet sleeve" type distortion can lead to premature head gasket failure. I doubt any manufacturer will repeat the disaster that was the GM "make a gas engine run on diesel" debacle. I think those were prone to breaking crankshafts. Doubling the compression ratio with no supporting mechanical enhancements was classic "Malaise Era," to use the LeMons term.

 

It was not my intention to come across as standoffish, if I did, I apologize. The full conversion package goes into engine, transmission, suspension, brakes, subframes, wheels etc. and is mostly suited for track or fun car driving. It's in no way a pleasant experience as an every day car because the comfort and engine behavior are quite different from what you are accustomed to before the conversion. Costs aside, emissions can be a concern and as I recall you were hoping to just have a crate engine or engine upgrade done. In fairness to those that made a substantial investment, and as something I truly like to see done properly, and by that I mean a total car upgrade, I am not inclined to simply sell an engine.

There are several videos on Youtube and it's very clear from them how the engine is tuned mostly for track work and lost a lot of its smooth power/torque output for a more quick and brutal response. I will admit that it does not make for a GT experience any longer.

In reference to the transmission comments, I worked very closely with ZF and the stock ZF 8HP 70 (700Nm torque limit) is a great unit however, when it comes to modified V8s, you exceed the limits very quickly as identified by the excessive transmission fluid temperature after only 15 minutes of spirited driving. ZF mentioned that certain manufacturers (BMW is one of them) do routinely use their transmission above the rated limit. I opted to swap out the ZF 8HP with a 90 (900Nm). It s not terribly expensive and there is also a kit that can be used to upgrade the 70 model units.

If you go past the bolt-ons on the V6, you will end up with a car that responds like this. It's not to the liking of many but you can forget the nice linear output (screen shows accelerator/brake and the accelerator is NOT set to dynamic to keep it linear). You should really carefully consider if you want to go in that direction. There are several other videos if you search Vengeance on Youtube and I wouldn't want this to be perceived ad advertising. I am just cautioning you that when you look at going over 460hp, you are looking at huge expenses and a total change in your car behavior. Undertake that project carefully and with lots of $$$

 

Fine tuning the shifting program on the ZF8HP transmission, shaves quite a bit of time too

 

No apology necessary. It may have been a poor choice of wording on my part if you felt an apology was needed

I strongly suspected as much and chose not to pursue the matter. I am extremely satisfied with 450+hp on a lightened V6. No need for anything more when challenging the twisties, but always contemplating how to push the envelope.

 

The root cause of this is legal misbehavior by other, less knowledgeable, parties. You can find background information on this in a number of now-locked threads.