Don Terrill’s Speed-Talk

Because it is a very simple formula. There is a much more complex formula that not only uses the valve seat be also the valve seat angle to calculate effective area. https://www.speed-talk.com/forum/viewtopic.php?t=1257&sid=a9dd4ef99a3ca0aa4f406dd7c92eb973 Stan I feel like Rick360 created an ex...

I thought my accessory and pulley alignment issues were annoying... Yours seem worse still. (I just had to space some things out because of my crank trigger wheel, too.) Then my Alum brackets weren't made to work together so I had to grind the crap out of the alt bracket to make it clear the chromed...

CVF told me they won't make even a custom diameter crank pulley vs. of an existing dramatically underdriven pulley they already make. They had me call JK Pulley in St. Louis for custom pulley. They will want either a CAD diagram or Google Sketchup drawing of what you want or a list of measurements b...

I've had a theory for a few years that thermal barrier coatings SHOULD act fairly similarly to some sort of increase in compression (with the exception of the better expansion ratio). I finally found someone who had a copy of Dynomation and who tested it at least in a good sim. First he just took an...

If you can obtain a system curve (pressure drop vs flow) for your radiator you can measure the flow by simply measuring differential pressure between radiator inlet and outlet. Ask PWR what pressure drop to expect through that radiator at 50 GPM then you can measure it very simply. I like that idea...

The gaps around the impeller, not so much the impeller shape, is what is important. If you remove the rear cover of the Edel #8810 Victor pump, the casting is TOTALLY different to the factory style. The impeller sits in a machined cavity with about 0.040" clearance to the casting. When you loo...

PWR replied to a question I sent yesterday about recommended coolant rates with their 55mm (4mmx12) core radiators. They recommend 50-55 GPM of coolant flow with them and hinted that for street apps that will have coolant below that flow rate for most of the driving time that they'd instead recommen...

I'll add to the chorus of "get rid of the heads". Those heads are probably already cracked, too. They are crack monsters. The compression is also going to be awful, so the heads are also getting you more compression with the smaller chamber. I think the stock stall speed of the 81 Corvette...

PWR / C&R is using those extruded tubes, too. A lot of their radiators for Classic cars now seem to use 55mm, extruded tubes like that broken up into 12 separate 4mm wide tubes. (They seem to be using dimpled versions of them now.) I like that it essentially allows for a "single core" ...

" 4 core aluminum radiators." are less efficient at cooling than 2 core or 3 core wide tube radiators. The tubes in a 4 core rad are too small. The OEM's have known this since the 1980's. I thought this was common knowledge. I run a 2 core wide tube aluminum rad on my 500 hp engine . It r...

Rick, Do you know if any water pump testing differentiated between gas-saturation levels in coolant/water? I would also guess that the percentage would change during operation assuming less than full saturation? Maybe this question belongs in a Formula 1 thread. https://srdata.nist.gov/solubility/I...

Ok I am still trying to figure out the 512 overheating problem. .... I installed a FlowCooler mechanical pump, and I just called them and got the runaround on how much their pump actually flows. WHEN is it overheating? Idle? Around town driving, or highway? On the FlowCooler pumps: I believe their ...

Aside from the data I generated when designing cooling systems for rec vehicles, I have never seen a water pump flow map in the "wild". In the big picture, I'm not sure re-engineering the cooling system is necessary for this issue. I just asked Stewart and they sent me the full testing da...

I did NOT understand how small the tubes on those Mezzo micro-channel radiators were.

https://youtu.be/rq1hchaM7MA?t=78

Adam

My thoughts are is the Copper Development Association is a copper industry funded marketing arm to try to sell copper (I searched on Google for a few minutes to figure out their deal besides being the obvious). My observation is to just do whatever PWR (formerly C&R in North America) does. They...