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Search found 758 matches

by rebelrouser
Mon Aug 15, 2022 9:02 am
Forum: Engine Tech
Topic: LS/circle track?
Replies: 12
Views: 550

Re: LS/circle track?

The only improvement I would see in an aftermarket crank trigger over the OEM one is if you would need to adjust the timing with the crank trigger. In fact from a quality and how clean the signal is, the few I have had on a scope the OEM is better anyway. As long as the ignition box you are using wi...
by rebelrouser
Sat Aug 13, 2022 12:38 pm
Forum: Engine Tech
Topic: old superflow dyno help
Replies: 20
Views: 404

Re: old superflow dyno help

I will second Performance Trends Dyno software and technical support.
by rebelrouser
Wed Aug 10, 2022 9:19 pm
Forum: Engine Tech
Topic: Solid flat tappet
Replies: 9
Views: 531

Re: Solid flat tappet

That would make me nervous. At this point do you take the time to pull the lifters and see if they are breaking in properly, or just cross your fingers? I have removed the valve covers and started the engine, at a fast idle if the lifters are rotating the push rods usually rotate as well. I guess th...
by rebelrouser
Wed Aug 10, 2022 6:43 pm
Forum: Engine Tech
Topic: Centistoke oil rating
Replies: 19
Views: 693

Re: Centistoke oil rating

I actually think the newer OEM engines all require a thinner oil, and at least a synthetic blend, I just don't think they spell out the lifters by themselves needing a thinner oil. I have seen some posts and my own experience with a couple of newer vortecs that with thicker oil they do not lube the ...
by rebelrouser
Wed Aug 10, 2022 12:15 pm
Forum: Engine Tech
Topic: Centistoke oil rating
Replies: 19
Views: 693

Centistoke oil rating

I just installed a set of Morell hydraulic roller lifters in a BBC engine, in reading the instructions they recommend a Centistroke rating of less than 15cSt at 100 degrees C. I looked and found out what Centistroke means, and it is related to viscosity. I looked up a couple oils I use and no Centis...
by rebelrouser
Wed Aug 10, 2022 10:10 am
Forum: Vintage/Classic/Historical Engine Tech
Topic: Dual Quad tuning tips?
Replies: 33
Views: 627

Re: Dual Quad tuning tips?

To get the idle sweet and better response, you need to synchronizer the carbs at idle. I bought one similar to this from Dan Dvorak before he died. I simply made up some adapters out of plastic sewer pipe to fit different style carbs. https://www.ebay.com/itm/151717668361?var=0&mkevt=1&mkcid=1&mkri...
by rebelrouser
Tue Aug 09, 2022 12:48 pm
Forum: Engine Tech
Topic: Cylinder head choices for 6.0L Chevy engine
Replies: 3
Views: 237

Re: Cylinder head choices for 6.0L Chevy engine

I bought this book, relatively cheap and the flow numbers listed were pretty close to my bench so far. High-Performance GM LS-Series Cylinder Head Guide by David Grasso https://www.amazon.com/High-Performance-Ls-Cylinder-Head-Guide/dp/1613254318/ref=sr_1_13?crid=1MEK05C3LZP50&keywords=ls+engine+book...
by rebelrouser
Mon Aug 08, 2022 8:40 am
Forum: Vintage/Classic/Historical Engine Tech
Topic: Dual Quad tuning tips?
Replies: 33
Views: 627

Re: Dual Quad tuning tips?

To get the idle sweet and better response, you need to synchronizer the carbs at idle. I bought one similar to this from Dan Dvorak before he died. I simply made up some adapters out of plastic sewer pipe to fit different style carbs. https://www.ebay.com/itm/151717668361?var=0&mkevt=1&mkcid=1&mkrid...
by rebelrouser
Fri Aug 05, 2022 6:55 pm
Forum: Engine Tech
Topic: Drilling holes in head gaskets = more flow = lower temps: Change My Mind!
Replies: 41
Views: 1382

Re: Drilling holes in head gaskets = more flow = lower temps: Change My Mind!

The thing about making modifications is you are the engineer. So how much time, money, testing equipment, design software, etc do you have access to? Engineers are not geniuses. My son is a pretty good engineer, and he asks a lot of questions when I ask for help with an issue, he does a lot of highe...
by rebelrouser
Fri Aug 05, 2022 8:54 am
Forum: Engine Tech
Topic: Questions about ports that stall, and cam lift.
Replies: 32
Views: 1099

Re: Questions about ports that stall, and cam lift.

As i read through this discusion the thought occured to me that a cam with a lot higher lift will also most often have more duration at each step of valve lift. That more agressive profile i assume would offset lost flow from a head ported to gain flow up high at the expense of some mid range? I al...
by rebelrouser
Sun Jul 31, 2022 3:36 pm
Forum: Engine Tech
Topic: Dyno brake slippage?
Replies: 11
Views: 482

Re: Dyno brake slippage?

Me thinks you need a 13" dual rotor like mine. yes, I got old junk, but at my age don't see spending a ton to update the unit. Only reason I have a dyno is that it was a retirement present to myself. The guy I bought my components from upgraded to a dual rotor. Land and Sea makes a newer brake with...
by rebelrouser
Sun Jul 31, 2022 3:31 pm
Forum: Engine Tech
Topic: Dyno brake slippage?
Replies: 11
Views: 482

Re: Dyno brake slippage?

How big are your water pumps? I’m just curious. I am not sure exactly how big the pump is, got it in the pile of parts when I got the dyno. But I have a pressure gauge on the manual control, and it is set to 50 psi, seldom see it drop more than a couple PSI on a pull. I have no way to measure the f...
by rebelrouser
Sun Jul 31, 2022 11:57 am
Forum: Engine Tech
Topic: vacuum pump help
Replies: 5
Views: 430

Re: vacuum pump help

Just a couple observations after messing with the vacuum pump on my engine. One of the factors will be how much blow=by your rings have the more blow-by the less vacuum your pump will make, as it has to constantly keep up with the leakage past the rings. secondly how well is your engine crankcase se...
by rebelrouser
Fri Jul 29, 2022 2:34 pm
Forum: Engine Tech
Topic: Dyno brake slippage?
Replies: 11
Views: 482

Re: Dyno brake slippage?

The engine was defiantly accelerating faster than I could hold it. Photo of the pull on the software. Second is what the software calls troubleshooting graph, raw data before it is processed. You can see the hump when I added load to the brake, and I added more but I don't see any hump that it affec...
by rebelrouser
Fri Jul 29, 2022 9:15 am
Forum: Engine Tech
Topic: Dyno brake slippage?
Replies: 11
Views: 482

Re: Dyno brake slippage?

I have about 6 inches of hose coming out of the brake and the water sprays on a temp sensor in the surge tank. And you may be right on how much torque the sensor can handle.