ptuomov

150+ hp per cylinder with stock 4V exhaust valves sounds very good.

To the extent I’ve got a point here, it’s that one has to go very far up the aftermarket price/quality distribution before getting something that is actually superior to the original 4V exhaust valves from the 1980’s.

blade7

Your point ignores what two 16v turbo engine builders have posted on this thread. Tim in the first post that he had new exhaust valves made to take the extra heat, and what Duke just posted about aftermarket exhaust valves.

ptuomov

How does my point ignore those posts?

blade7

Do you want to ask a friend?

ptuomov

sure, someone please help me out

turbotim3

Well lads its been a long time since my last post but things are always busy. The Sierra RS500 touring cars are back out racing and we have had several to build. All up to late spec. These are on top of the normal run of the mill stuff. So the 944 been sat in the garage. Its had the KW suspension fitted, plus fully poly bushed and its now had a full geometry set up. All on road mapping is done and I'm rather impressed with her. I found the steering a little slow with it being 3.25 turns lock to lock, so I have had a steering rack developed for it that is 2.2 turns. This as transferred the way it feels, more responsive so when you get sudden oversteer you can catch it better. I have to say they are one hell of a car and a couple of pro drivers have driven it and were well impressed.
Cheers Tim

blade7

Did you have fit another gearbox Tim?

Penguinracer

In terms of aftermarket valves - does anyone how the Swiss-made Intervalves Technologies items stand-up to the heat?

Tim

turbotim3

No Paul, I have had no problem with the gearbox, touch wood
Cheers Tim

turbotim3

Sorry mate I know nothing about their valves. Mine were by Ferrea in the USA and been fine in my engine
Cheers Tim

Penguinracer

Thanks Tim.
It's great to hear that your machine is running sweetly - it's truly impressive & a credit to you.

Tim B.

turbotim3

Thanks Tim

Humboldtgrin

To whom it may concern, more photo’s and videos of really cool 16v 951 sport cars are always appreciated... thank you in advance for your time.

blade7

The car was for sale earlier this year, wonder if it was sold?