Project Tial650 S4 complete...

[PRY4SNO]

Re: Project Tial650 S4 complete...

Motor was lugged in 6th gear under hard boost and 2 pistons melted.

I knew that wondering what's new with the project... what's this monster's status??

[R-Audi]

Re: Project Tial650 S4 complete...

I was wondering about the pistons melting as well.. they typically arent the weak point since they come forged from the factory.. it would have to be pretty lean to melt them no?

[The_Jerbel]

Re: Project Tial650 S4 complete...

Not lean, just hot. Remember that there are a lot of factors that play into combustion chamber temperature. The stock exhaust manifolds, with their extremely limited flow, are definitely one of those factors, among many others.

VAST is building another motor, this time with 2.8L pistons. We're resetting the Tial WG's, contrary to Tial's recommendation, at a sedate 15psi. The setting that they suggested resulted in the WG break threshold being set at 27psi.

[dogbreath]

Re: Project Tial650 S4 complete...

If it was caused by execess heat and not being lean why did only two pistions melt? I thought these cars had a "Limp" mode. So would this not have basicaly shut down the boost before anything melted? Are you guys going to change anything with the exhaust manifolds?

[The_Jerbel]

Re: Project Tial650 S4 complete...

Certain cylinders' exhaust flow is more restricted than others, heat from the turbos is closer to cylinders 3 and 6, etc. There are a few reasons that heat would be generated more in some cylinders than in others.

The engine build is being done by VAST, so I'm not sure what they're doing with the manifolds.

[Disturbo]

Re: Project Tial650 S4 complete...

Hope the car is fast again, We shall race next year when my new car is built..

[The_Jerbel]

Re: Project Tial650 S4 complete...

LOL, sounds good!

What's the new car gonna have under the hood?

[dogbreath]

Re: Project Tial650 S4 complete...

So then with 2.8 pistions and what ever elese the motor builder does do you expect to see higher awhp # Or about the same? Is there going to be that much of a difference with bigger pistions? What kind of boost is going to be run in this new motor.

[The_Jerbel]

Re: Project Tial650 S4 complete...

Should be similar power, perhaps a bit more, but it'll be running 22-23psi and a lot more timing to get there.

[Mister T]

Re: Project Tial650 S4 complete...

How much timing?

[The_Jerbel]

Re: Project Tial650 S4 complete...

Only the logs will tell

[dogbreath]

Re: Project Tial650 S4 complete...

Are you guys sticking to the Tial kit?

[dogbreath]

Re: Project Tial650 S4 complete...

So what's the time line on this car,when's there going to be some more Vid's?

[The_Jerbel]

Re: Project Tial650 S4 complete...

Engine is still at VAST being built. Not sure about whether the Tials will stay or go, depends what Mark can work out with VAST.

[dogbreath]

Re: Project Tial650 S4 complete...

So it's been a while since there has been any post about this car! I was just woundering if they're is any progress with it or has the owner given up?

Also since there were 2 melted pistions,was they're any other damage done to the motor like rods,valve damage?? It just seems it is takeing forever to see any results on this car.