Don Terrill’s Speed-Talk

So I feel I need to clarify a lot ! So what’s going on, we’re pulling with a large 4 cylinder (400+ cubes tractor engine, the engine has be extensively modified but due to rules has to run a factory exhaust manifold to 3 inch exhaust pipe, and intake both have been ported and the stock appearing car...

If I buy this program and I end up changing laptops will I still be able to use it on the other laptop or will I have to repurchase it again ?

Yes I do understand that, just bouncing questions of of people would are a lot better at this than me. Just trying to find a simpler way to help me start to educate myself in how to tune engines better.

Would reading the plugs be better ? Or what would a good desired air/fuel ratio be ?

Looking for a simple data logger for air fuel ratio. Not looking for a 1500 dollar system just like simple air fuel ratio for a 4 cylinder. I would put a gauge on ,but it’s during a pull and I can’t watch the gauge to make a decent adjustments. Thanks for the time !

Guessing since I am out of town and can’t give you an actual measurement my guess is a half inch difference. Enough so that there is a flat area around the valve behind the seat that is parallel to the valve face. I like the idea thought ! Wish I could include pictures but again I am out of town.

Tuner the port actually goes back to a normal size after the bowl. I should have said bowl not throat. But i can imagine velocity drops dramatically after the valve seat. I was actually wondering if I enlarger the valve till the bowl and seat was a smooth transition if there would be any benefit. Bu...

Okay well okay can we break this down a little. I have a few questions about a few of the options mentioned. Like how the firing order affects the header and how do you chose which cylinders to pair with each other ? How about I ve never heard of a straight collector and then placing different ventu...

Well some of the head problems are that the exhaust throat is larger than the exhaust valve. It enlarges just passed the valve seat and the intake is a shared, one intake feeds two cylinders. 4 cylinders, 390 cubes , 3000 rpms 6.5 stroke 4.375 bore 14.5 comp. two valve head both intake and exhaust p...

I agree Adam I am pretty new myself but I am looking and dreaming about building a header for a pulling tractor. Which the heads and ports are extremely poor compared to car heads. So I am looking for all the splints I can physically use to help flow and velocity. Also trying to learn a few things a...

Okay I have the basic idea how they figure the length and size of pipe. But what about collector size ?length? Angle ? The transition cone ? What about 4 to 2 to 1 headers and other designs that pair one header to the other side on certain cylinders. I remember seeing a drawing of a v 12 engine that...

okay what is the best brand crimping tool ?

Where is the best place to buy a good all around weather pack kit ?

Do it a lot in the classes that say stock appearing. Can’t say I ve dyno tested it but It probably would help some but it’s not going to get close to what a good header would be or even a average header

http://www.bing.com/images/search?view=detailV2&ccid=gXdTx2IJ&id=E9D88A479B9774A7AC014E4BB8A2EFECF68C6002&thid=OIP.gXdTx2IJEc-jEnFUFSDoxQEsDh&q=ih+450+lp+gas+head&simid=607996031677302842&selectedIndex=0&ajaxhist=0 so this would have a less quench than lets say this head...