turbogrill Posted November 27, 2018 Report Share Posted November 27, 2018 Hi Someone told me not to remove the thermostat since the coolant will run too fast thru the radiator and not cool down. This doesnt make sense at all to me. In my mind the faster the better. (Sure, at some point the friction between water and surface might create heat.) Could someone that listened in high school physics class explain? Quote Link to comment Share on other sites More sharing options...
cagedruss Posted November 27, 2018 Report Share Posted November 27, 2018 You are not giving the water enough time to transfer the heat. Works both ways, too fast or too slow doesn't work. If you want to remove the thermostat limiting the failure in a race then remove the guts of the thermostat and reinstall it. Moroso even sells restrictors in a 3 pack I believe but the original piece works just fine 2 Quote Link to comment Share on other sites More sharing options...
ironworks Posted November 27, 2018 Report Share Posted November 27, 2018 (edited) 59 minutes ago, cagedruss said: You are not giving the water enough time to transfer the heat. Works both ways, too fast or too slow doesn't work. If you want to remove the thermostat limiting the failure in a race then remove the guts of the thermostat and reinstall it. Moroso even sells restrictors in a 3 pack I believe but the original piece works just fine 100% gut the thermostat or install a restrictor! https://www.summitracing.com/parts/mor-63440?seid=srese1&cm_mmc=pla-google-_-shopping-_-srese1-_-moroso&gclid=EAIaIQobChMIuanzgMLz3gIVBx-GCh3DhwtJEAQYASABEgKJg_D_BwE. that kit is nice because you can swap between the 3 and test which one works best for your setup. Found them on eBay too with free shipping. we put the middle size in first then see if its good or if we need to go bigger or smaller. Edited November 27, 2018 by ironworks Quote Link to comment Share on other sites More sharing options...
enginerd Posted November 27, 2018 Report Share Posted November 27, 2018 (edited) 1 hour ago, cagedruss said: You are not giving the water enough time to transfer the heat. Works both ways, too fast or too slow doesn't work. While the end result might be right (use a restrictor), this reasoning, from an engineering standpoint, is booooooooooogus. What people have said in other threads is that the pumps cavitate and therefore pump far slower if there is insufficient backpressure (flow restriction). People assume it is pumping too fast when they remove Tstat and it cools poorly, when actually it may be pumping too slowly. Edited November 27, 2018 by enginerd 4 4 Quote Link to comment Share on other sites More sharing options...
LAMR2 Posted November 27, 2018 Report Share Posted November 27, 2018 Yep, if you had a magical pump that you could run as fast as you wanted without cavitation, you could get the engine to near ambient temps. The more massflow through the radiator, the higher average temp difference you'll maintain and the better cooling you'll have. 1 3 Quote Link to comment Share on other sites More sharing options...
rod rammage Posted November 27, 2018 Report Share Posted November 27, 2018 (edited) The reduced hole size in a thermostat acts as a restriction. This restriction causes the pressure in the block to be higher than in the radiator (where the pressure is regulated by the cap). This increase in pressure (as high as 60 psi) raises the boiling point of the coolant in the block to prevent localized boiling in hot spots ... Especially where there is less optimal flow. More modern cooling systems have better optimized flow and this restriction in some cases may not be as critical in optimizing the cooling system's effectiveness. Edited November 27, 2018 by rod rammage 1 Quote Link to comment Share on other sites More sharing options...
CBraden Posted November 28, 2018 Report Share Posted November 28, 2018 (edited) I want to thank the informative posters in this thread. For every thread I read like this, I wish I didn't have to go through 20 bitching about rules to get here, but threads like this are what keep me coming back to this forum - great knowledge sharing by people who know. Edited November 28, 2018 by CBraden Edited for clarity. 4 Quote Link to comment Share on other sites More sharing options...
morganf Posted November 29, 2018 Report Share Posted November 29, 2018 Faster flow can also cause "short circuiting" where the water doesn't flow evenly through all the smaller passages causing hot spots. Quote Link to comment Share on other sites More sharing options...
Technical Advisory Committee Andrew D Johnson Posted November 29, 2018 Technical Advisory Committee Report Share Posted November 29, 2018 I just run it stock, the OEM spent more time and money than I have developing these systems. 2 Quote Link to comment Share on other sites More sharing options...
mender Posted November 29, 2018 Report Share Posted November 29, 2018 9 minutes ago, red0 said: I just run it stock, the OEM spent more time and money than I have developing these systems. Same here on my personal stuff, no failures in thirty years of racing. Quote Link to comment Share on other sites More sharing options...
Rodger Coan-Burningham Posted November 29, 2018 Report Share Posted November 29, 2018 https://shop.championcooling.com/articles/high-flow-water-pump http://www.badasscars.com/index.cfm/page/ptype=product/product_id=280/prd280.htm http://www.pirate4x4.com/tech/billavista/Cooling/ 2 Quote Link to comment Share on other sites More sharing options...
Technical Advisory Committee mcoppola Posted November 29, 2018 Technical Advisory Committee Report Share Posted November 29, 2018 Some great technical data /articles Rodger - thanks! Quote Link to comment Share on other sites More sharing options...
turbogrill Posted November 29, 2018 Author Report Share Posted November 29, 2018 So I think I will install a on a pressure sensor inside the block to monitor high and low coolant pressure. A stuck thermostat should result in crazy block pressure. A benefit with monitor in the block vs the radiator is that you get a earlier warning and a more "true" warning. At least that is my theory. I want a thermostat and think we would run to cool without one. Quote Link to comment Share on other sites More sharing options...
wvumtnbkr Posted November 29, 2018 Report Share Posted November 29, 2018 Im thinking about adding a pressure gauage for the fuel and the water. I ordered a new fuel pump and 15 x 10 wheels for my car. Didn't touch the actual car.... probably won't for awhile. Gotta install my new seat and other new lift pump and exhaust and new lightweight battery and brake upgrade and wiring and.... Quote Link to comment Share on other sites More sharing options...
Jer Posted November 29, 2018 Report Share Posted November 29, 2018 After cooling issues in my car, I would up drilling a small hole in the thermostat center piece. Worked great, it's now easy to bleed air out too. 1 Quote Link to comment Share on other sites More sharing options...
turbogrill Posted November 30, 2018 Author Report Share Posted November 30, 2018 20 hours ago, Jer said: After cooling issues in my car, I would up drilling a small hole in the thermostat center piece. Worked great, it's now easy to bleed air out too. How does it help with the air? Quote Link to comment Share on other sites More sharing options...
Team Infiniti Posted November 30, 2018 Report Share Posted November 30, 2018 Just now, turbogrill said: How does it help with the air? Air pocket behind thermostat can make filling difficult or lengthy especially if having an incident during race. Drilling a hole allows quicker refill less Burp back 1 Quote Link to comment Share on other sites More sharing options...
karman1970 Posted November 30, 2018 Report Share Posted November 30, 2018 I ditched our T-stat altogether. Less weight, more powah! Quote Link to comment Share on other sites More sharing options...
housejoe Posted December 12, 2018 Report Share Posted December 12, 2018 On 11/28/2018 at 9:45 PM, red0 said: I just run it stock, the OEM spent more time and money than I have developing these systems. Yeah that was my take as well until I had a 2 race old t-stat stick closed and almost cost us an engine. Now we run no stat and regulate temp with tape on the grill on super cold days, but hardly ever need to. Maintains in the 180 range mostly on it's own...fox body mustang 302 2 Quote Link to comment Share on other sites More sharing options...
Administrators E. Tyler Pedersen Posted December 12, 2018 Administrators Report Share Posted December 12, 2018 I had a failure with a tstat so I gutted it and added in a restrictor. Now car runs great and I elminated a fail point. Quote Link to comment Share on other sites More sharing options...
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