Don Terrill’s Speed-Talk

I'm having difficulty finding manifolds to fit a twin turbo setup for the room I have. I have not seen any twin scroll manifolds at all for LS motors. I'd be happy with around 650hp max at the crank. So 325hp per bank. The armageddon manifolds look like they would fit really well in my engine bay.

Hi im back, hope your all doing well. Ive had my lq4 on the road for a while now. It does decent but i still want more power for towing below 3500 rpm. So if I could have like 6lbs of boost at like 2500 rpm i think that would do it. Someone else that put a turbo on a lq4 for towing said they were ha...

I added the dampener. I drilled the holes in the block to add it. I figured it would reduce chain slap and help it last longer. But I was just guessing on that. I was afraid of the tensioner because of the added complexity,

I have a gen3 lq4 block. It doesn't have any type of tensioner. Will adding a ls2 chain block make a difference? I read a brief mention about preventing excessive sprocket wrap but not sure if that's a real issue. Will the ls2 chain block provide any benefits?

Thanks for the input. I am going to run the gen 3 truck intake. I looked into the gen4 intake and it did make more power up top. But the gen 3 makes more torque below 3k rpm so I kept the gen 3. I'm guessing the smaller throttle body gives more velocity at lower rpms. Here is the link... https://m.f...

I ordered up a set of comp cams trunnions. I noticed years past a lot of people complaining about them. Some say they have been redesigned since. Should I return them? Are they total junk?

I was looking at that break in oil earlier. Thanks for verification that its good to use. For my top ring gap with my 4.030 bore I chose .018 on the top ring and .20 on the 2nd. Does this seem right for a truck that will be towing up mountain passes from time to time in Colorado? I noticed in the ch...

Getting closer on getting the Lq4 together. Filing the Rings supplied with the wiseco pistons has taken me a while. I've read some info on break in oils. Is a break in oil necessary since the Lq4 has a roller cam? Another question as far as ring seating, should I drive it to break in the Rings befor...

Thank you mt-engines. I do have some tootsies

So what kind of radius should I go for when removing the sharp edge from the combustion chamber? Something very slight or something bigger like a 1/8" radius?

Quick question about my cylinder heads. The machine shop did a light deck on the heads for a nice gasket surface. I noticed the edge of the combustion chamber is pretty sharp. Should I knock down the sharp edge with a file or sandpaper roll or something?

I’m puzzled by your choice of a stage 2 cam for an application requiring torque. Have you looked at the dyno charts on their website? Your chosen cam (on a 5.3) makes minimal improvement below 4500, do you plan on sustained towing above 4500? A stage 1 seems like a more suitable choice, IMHO. I wat...

I just watched the Richard Holdner video again. The stage 1 did not lose any torque down low over the stock lq4 cam. The stage 2 lost 6 or 7 ftlbs below 3500 but sustained the torque curve significantly further before dropping compared to the stage 1. Its been a while since I bought the cam, but it ...

I’m puzzled by your choice of a stage 2 cam for an application requiring torque. Have you looked at the dyno charts on their website? Your chosen cam (on a 5.3) makes minimal improvement below 4500, do you plan on sustained towing above 4500? A stage 1 seems like a more suitable choice, IMHO. I wat...

Ok thanks.