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Search found 36 matches

by curtis reed
Fri Aug 05, 2022 9:34 am
Forum: Engine Tech
Topic: Head Studs
Replies: 26
Views: 826

Re: Head Studs

Maybe an option to look into for studs.

https://optitorque.com/
by curtis reed
Thu Jul 16, 2020 2:07 pm
Forum: Valve Train
Topic: Valve train control loss question
Replies: 27
Views: 5155

Re: Valve train control loss question

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 ...
by curtis reed
Mon Mar 16, 2020 1:18 pm
Forum: Valve Train
Topic: Valve train control loss question
Replies: 27
Views: 5155

Re: Valve train control loss question

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...
by curtis reed
Thu Mar 12, 2020 11:39 am
Forum: Engine Tech
Topic: How much zddp
Replies: 72
Views: 7741

Re: How much zddp

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'...
by curtis reed
Thu Mar 12, 2020 9:20 am
Forum: Engine Tech
Topic: How much zddp
Replies: 72
Views: 7741

Re: How much zddp

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 any of the newer Penng...
by curtis reed
Wed Mar 04, 2020 7:31 am
Forum: Valve Train
Topic: Valve train control loss question
Replies: 27
Views: 5155

Re: Valve train control loss question

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...
by curtis reed
Tue Mar 03, 2020 4:37 pm
Forum: Engine Tech
Topic: ARP head studs
Replies: 10
Views: 1412

Re: ARP head studs

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.
by curtis reed
Tue Mar 03, 2020 7:29 am
Forum: Valve Train
Topic: Valve train control loss question
Replies: 27
Views: 5155

Re: Valve train control loss question

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...
by curtis reed
Mon Mar 02, 2020 8:55 am
Forum: Valve Train
Topic: Valve train control loss question
Replies: 27
Views: 5155

Re: Valve train control loss question

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.

Image
by curtis reed
Thu Feb 13, 2020 12:19 pm
Forum: Engine Tech
Topic: Choosing the right shaft mounted rocker arms
Replies: 16
Views: 2090

Re: Choosing the right shaft mounted rocker arms

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...
by curtis reed
Mon Jan 27, 2020 4:48 pm
Forum: Engine Tech
Topic: Moroso oil accumulator/preluber questions
Replies: 13
Views: 1464

Re: Moroso oil accumulator/preluber questions

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 bla...
by curtis reed
Fri Oct 25, 2019 11:17 am
Forum: Valve Train
Topic: Valve train control loss question
Replies: 27
Views: 5155

Re: Valve train control loss question

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...
by curtis reed
Tue Oct 15, 2019 11:12 am
Forum: Valve Train
Topic: Valve train control loss question
Replies: 27
Views: 5155

Re: Valve train control loss question

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.
by curtis reed
Tue Oct 15, 2019 7:40 am
Forum: Valve Train
Topic: Valve train control loss question
Replies: 27
Views: 5155

Re: Valve train control loss question

Is this a new build engine or a previously proven sound engine? Cheers. Sorry, raced all weekend and am just now getting caught back up to answer. Sort of both is the short answer. I have run this rocker arm combination for years but in September of 2017 I broke a gear set and put in a 4.88 from a ...
by curtis reed
Thu Oct 10, 2019 1:20 pm
Forum: Valve Train
Topic: Valve train control loss question
Replies: 27
Views: 5155

Re: Valve train control loss question

When you say 'it is loosing control at 7000rpm' how is it manifesting itself? is the engine plateauing or missing? Cheers. It will start missing pretty bad and it stops pulling. It doesn't just lay over like an air restriction or being lean. I killed the intake springs when it did it because I was ...