Don Terrill’s Speed-Talk

Warp Speed wrote: ↑Fri Apr 28, 2023 5:03 am So, the op had an oil line come off and we are talking detonation and oil filters?!? Lol

I started the detonation discussion because the pics made the edges of the bearings look beat down not knowing he had tape on them. Sorry if it seemed a dumb question.

In the last picture what is sticking out on the top edge of that bearing? You can even see it in the shadow. Did this thing detonate bad on you?

The measurement you cited means nothing to what you want to know.

Maybe an option to look into for studs.

https://optitorque.com/

Well it's been a tough year to get out to the track. Got out to our first race in April just to get some data with new carb set up and new springs shimmed much closer to coilbind. No they weren't the Isky springs, they were the other half of my springs that were still new. Still did it. Then things ...

What's your recording rate on your O2's? It's not all smoothed out and at a low rate is it? With all that mayhem in the RPM trace, one would expect subsequent misfiring and lean mixtures. On my brother's dragster, I can evaluate little bumps and dips in the RPM trace, look at which bank the O2 lean...

Have you had any of the newer Penngrade tested against the old Brad Penn at a lab? I had seen some info that they no longer use the original base stock in their oils. I'm not saying it still won't work, just that it may have changed contrary to what you posted above. Just something to look into. I'...

There's a few really good "Off the Shelf" oils out there. I don't recommend them, because the large companies have a history of changing an oil's formula, without ever telling anyone. There's a much smaller risk of that happening with a "Not for on-road use" oil. Have you had an...

Sounds like a plan, when i suggested testing the ignition i meant the whole ignition, box,distributor, leads, and power supply. The breakdown of the engine looks almost immediate?? interestingly the engine was quite happy at the shift [6900] the graph shows a rpm kick up at 7.7-7.8 sec [but no chan...

Easy enough to have a shop run a thread ring gage on the threads of the stud to rule out thread pitch issues as someone stated they had.

It breaks down quite suddenly doesn't it ? it almost looks like the rev limiter has kicked in?? I have ran it without a chip in the top side rev limiter and no change. fuel airs look very linear,is that 12.8-12.9 fuel air? what was the final egt? I'm on alcohol so 5.3-5.7 I don't run an egt since I...

Well I did find two broken inner springs so I am still leaning toward loss of control. I should get the car out in a couple weeks to do some testing. o2 data doesn't show anything that I can see. If this keeps being a problem I will buy another ignition box to test.

I look at it differently than some on here. When is overkill a bad thing if it doesn't hinder HP or slow you down and adds more reliability and durability? Just like you don't need an aftermarket block only making 500hp, there isn't a downside. I called Jesel last month for a steel rocker set for my...

This is the style I have: https://www.summitracing.com/parts/mor-23930?cm_mmc=ppc-google-_-search-_-brands-_-keyword&gclid=EAIaIQobChMIqfL_8Leh5wIVAdvACh2INAYeEAAYASAAEgJn9PD_BwE it doesn't look to be available any longer and I don't see how it could be disassembled. I'm guessing it must have a...

I'd take a look at the pushrods to see if there's any strange wear patterns on any of them. Maybe they are rubbing against the intake port or valve cover. Could also be an ignition issue or electrical issue. Maybe sparkplug wires are old. Maybe rotor phasing is off. Maybe run ground wires instead o...

hoodeng wrote: ↑Tue Oct 15, 2019 10:57 am You would have to go with Mike's advice.

Do you look for multiple rocker tip patterns on the valve tips when the opportunity arises?

Cheers.

Yes I have looked it over well and it shows no signs of distress.