Don Terrill’s Speed-Talk

fair enough. and yes, it was removed.

Asked another way-
does anyone have information on which motor requires more/less timing? Thats a pretty good indicator of chamber effectiveness.

Lets try this again-

Which combustion chamber is better for a street car?
243 or 823?

I have a question that relate more towards a street oriented engine setup- If you are familiar with the 243 or "LS6" cylinder head, you know that the chamber has a quench pad behind the spark plug thats relatively straight and the combustion chamber size is roughly 64cc's which for the com...

You could sell the top end and throw on latemodel ls3/l92's that the 6.2 trucks have. With stock ls3 cam you'd make 330-340 whp tuned and get 12-14 mpg city 18-19 highway. My 6.2 L9H made 330 after tune bone stock. Its got the vvt but weighs 5400 estimated Kinda surprised at the cam choices. One is...

crazy how the dynamic compression only went up by 3/10ths of a point, but it really shifts the numbers around alot. Very good info. Thanks for all the reply's- will be making some phone calls here after I recover from christmas. BTW, I changed the numbers to make them more accurate with what I have:...

If you switched to this. Part# HR68340-69340-114 264/268 @ Seat 218/222 @ .050" .340"/.340" Lobe Lift 114 LSA 110 ICL You would make peak HP at 5,400rpm, and make 40ft/lbs more in the 2,500-3,000 range. That will make for a big increase in milage. Noted- the gas mileage is already te...

I have a third question, which im sure will get some eye rolls-

What would you change to optimize gas mileage AND lose less than 10% of the power currently available? (if you had to drop power to do so)

I'd go to a 224/234 on a 110, with a 106 ICL. That will increase the torque, and not lose any top-end. In the circle track world, I've seen the fresh guys add more exhaust duration to have more continuing/higher power at peak/after peak but the guys who are better drivers tend to reduce the exhaust...

More details for those who inquire- gearing is 4.10, transmission is 4L80E, truck is 6,600lbs and tires are 31" Torque converter is stock but I just emailed the sheet to Mike at precision industries. He suggests a multi-disk lockup with a 3400 stall, so I'll probably drop the money to get one. ...

Almost forgot-

Completely disregard ALL GREEN LINES. Tuners somehow think its important to show how bad it would run with pig rich A/F ratios when you bring them a fresh combination.

Here's a dyno of the vehicle first of all- graph is done at 6K (even thought it isn't shown) and starts falling off after 5500 gradually. https://fbcdn-sphotos-d-a.akamaihd.net/hphotos-ak-ash4/1502249_10153688009860173_982051745_o.jpg Engine is a 6.0 with ported 243 heads, 10.2:1 compression, ARH lo...

Nice to hear. I love doing less work on my own stuff. Can't pay myself enough!

Hate to ask, but was curious what the max duration was for a 6.0 LS before you need to clearance the pistons for valve reliefs. I'm running a 6.0 LQ4 with factory dish pistons, ported 243 heads, (compression is 10.2:1) .040 MLS head gasket, American Racing Headers long tubes, 1 3/4 primaries, and a ...

Hello once again! This is my current fuel efficiency "challenge" and I was hoping to confirm or kill a few ideas I had toward building this engine- Its a 1.0 3 cylinder engine for those who aren't familiar. It probably has a little more power than a briggs & stratton, but gets very goo...

Mr Rat, yes I am aware there are better oils. I am trying this oil because its readily available and is what weight oil Morel recommends for use with their lifters. I would like to say I do appreciate your time and effort spent on researching issues. Now onto my issue. Would sitting overnight be co...