333pg333

Angel, where are you or your car that it is so hot? We are pretty hot down in Sydney too so that's interesting how you run your car. I notice that the radiator is tucked away somewhat. How do you get clean air in and out to it? What is the crankshaft you speak of? Do you know who made your car?
Patrick

boost feen

Nice color combo, cobalt or iris blue?
Looks close to mine on the outside! Except about 100 HP more!

m42racer

Please tell me that I am reading this wrong. Your bore diameter is 108.00mm and your running a 106.50mm Gasket bore. Danger Danger William Robinson!!!!!

I hope I'm reading this wrong. Hate for that nice car to be heading for trouble. If you need a 108.00mm Gasket PM me. I have a Gsket solution using a Cometic with larger bore on a 6 Cylinder engine. Should be able to be usewd here as well.

I hope I'm wrong here.

zagaone

I'm in the caribbean. Temperatures are around a 100 degrees.
At the track they are even higher.
The huge front mounted i/c is in front of the a/c radiator which is mounted in front of the bigger aftemarket water radiator.
I designed a duct that force air through the radiators. Modified the water pump to force all the water through the radiator and engine block. Deleted the heater water lines. Every major engine accesory component is either wrap or heatshield protected. Also modified the front bumper with a bigger opening for increased air flow and have two oem oil coolers in line to increase oil cooling.

Water and oil temperatures are normal.

As for who designed and put together the 3.4lt block it was a guy in Canada by the name Rivard. This was around six years ago. By the time I bought it, it was already put together. I do have a lot of photos of the pieces used, including the crankshaft, pistons and rods.

Everything else in the car I know pretty well. I have own 944 turbos since 1992 and race them extensively. I saw the 968 turbo as the last and best of a kind.

The power, torque and overall drivebility of this 3.4lt is the best I have experienced, and I have been in the first two Hersheys gatherings and experienced tens of modified 944s including Powerhouse cars, supercharged 968, my friend Raj 968 turbo and a few 944 racing cars with 400 plus hp and 26xx pounds.

Angel

zagaone

It is Iris blue.
As for the bore and gasket they are indeed 108mm and 106.5mm. I'm being using the car like that for the last year without any issues. At the time Cometic told they could not make a gasket with a bore bigger than that. If it fails I hope by then Cometic has figured out a 108 gasket. I know is not perfect and probably losing hp but at the time I could not find anything better.

I will pm for your idea for the headgasket. Thanks.

Angel

pete95zhn

Nice car, Angel! It's always interesting to see an engine that has been put together and running using parts and methods outside "the general consensus" !

BTW,i f there's someone willing to share 3.0l engine ignition chart I'm very happy to recieve a PM!!

Tom M'Guinn

Angel, you weren't in St. Louis to see Garrity and a motor he was building you during his engine building class maybe 7 or 8 years ago were you?

zagaone

Yes. That was me trying to make a 3.0lt for my previous 944 turbo. Garrity supposely end up going to medical school and the project never happened. I sold the 944 and bought my first 968, the amazon green turbo that was featured a long time ago in Excellence magazine. That car end up being junk(chassis was bent), so I scrap it in CA and bought this iris blue 968. After a long story I finished it two years ago and have been enjoying it ever since.
This car is everything I wished for and expected after 15 years owning 944 turbos and one racetrack 968 and dealing and experiencing all kind of crap from different "aftermarket tuners".

Nice to hear from you guys.

Angel

gt37vgt

I think the epic news here is the first hand account of a big bore motor putting down 450+hp and ftlb year after year .
The reliability is the real good part of this story .

so witch of the fooling things do you feel has been the biggest factor keeping the motor together

1. Your strict and proactive thermal management.

2. your not so greedy with the boost .

3. your not so greedy with the Revs what is the limiter and shift point ?

4. what oiling improvements is there?

Also if we could just revisit cam talk ?
has anyone ever struggled to get 450hp from a 3.0 16 valve turbo with standard cams ??

zagaone

I will put them in the following order:

1. Engine tunning, exhaust temperature.
2. Boost level
3. Oil, water temperature control and monitoring.
4. Auxiliary systems temperature control.
5. Preventive maintenance.
6. Attention to details.

Red line is set at 7000 rpms and boost with 93 octane street gas of 1.1 bar and a maximum of 1.2 with a 50% mixture with racing gas. The 488.4 rwhp/440 PBS torque were at 1.1 using mix 93oct street gas and 103 racing gas. That is more that what street tyres can handle in the first 3 gears.

Angel

333pg333

Yes, good questions here. Also what oil and viscosity do you use?
As gt37vgt mentions about cams, did you consider going to non-stock cams?
I am still interested in the crank that you describe as a work of art?
Sounds like you've been around the block once or twice in these cars. I'm sure you have some interesting stories. Feel free to tell us about some of your other cars also.

zagaone

I use regular 20w/50, but I changed every 2500 miles or every few months.
As for the crankshaft I'm going to have the photo scan together with the photos of the dyno, pistons, bare block and rods. Someone might know what type of rods they are. When I tried to figured it couple of years ago I think the closer looking one where sold by Powerbouse, but i was unable to confirm. The crank looks knifeedge and lightened. With the single mass flywheel the engine revs like crazy. As for the cams I know about it but have not study or contemplated it because the car is working so well and have so much power and torque that I don't see the point of messing with them. I'm looking at the dyno chart right now. It is from 1/3/06 and it shows the engine making 488.4 rear wheel hp which should be somewhere around 550-575 flywheel hp with a max torque of around 440 lbs. The car is scary fast this way.
Angel

333pg333

Good to see you use a decent weight oil there, especially in the heat you have.
That's fair enough with the cams too. I would not want to change too much if the car is running so well either.

Tom M'Guinn

I thought that might be you. Great to see a long-time 944/968'r keep plugging away to get a fully sorted monster like that. How did Garrity's motor do?

Mikes3.0cabturbo

This is a great thread, one of the things I have never been able to find is 16v 3.0 ignition maps, I have created my own from a patchwork of different sources however I know it isnt optimum.

So in an effort to try and get a solid map available to all of us here is my current image, happy to share the actual number grid if this sharing takes off, but its not to easy to cut the numbers from my EMS....please critique as you see fit and then we may be able to assemble a common 'better' base map for users of a standalone EMS..

My current map runs really well like a stock engine off boost, on boost its still early days but is performing very well too, not been dyno'd yet. The pressures are in Kpa, 6.89Kpa = 1psi, or 0.6bar = 60Kpa

As mine is a low boost setup I have a fail safe past 9psi/60Kpa it drops quickly to 10 degrees flat, over time I will edit these cells too.

rgds
mike