944Hybrids: 924/944/968 and 928 V8 Conversions
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HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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Operating temp Empty Operating temp

Post  wanczykj Mon Feb 01, 2016 5:11 pm

How hot should my steel block f body 5.3 liter run?

At idle it sits middle of the gauge, on the highway it runs right around 205 degrees F, and after being pushed it jumps up to 220 degrees F.

Should I be concerned?

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Post  sharkey Tue Feb 02, 2016 12:37 am

220 isnt too bad as long as it comes back down a bit after beating on it. from stock the fans on the ls engines dont really come on till 210 ish, and slowly ramp up till they hit 220-225.

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Post  wanczykj Tue Feb 02, 2016 6:27 pm

Thanks for the response. Its not coming down fast enough and the car actually died today. Turned on the heat and it cranked back up and I made it home right at 220 degrees.

Thinking its time to upgrade to a bigger water pump, just don't know which one.

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Post  Punisher948 Tue Feb 02, 2016 7:32 pm

wanczykj wrote:How hot should my steel block f body 5.3 liter run?

At idle it sits middle of the gauge, on the highway it runs right around 205 degrees F, and after being pushed it jumps up to 220 degrees F.

Should I be concerned?

tell us a little about your setup (i.e pump, radiator, etc). it may be something really simple but if you haven't read this article...it is full of useful bits for me anyway

http://www.pirate4x4.com/tech/billavista/Cooling/

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Post  wanczykj Tue Feb 02, 2016 8:47 pm

I am running pure antifreeze as per the recommendation of a sales rep at O'reilly's.  

Time to thin that stuff out and run distilled water at a 80/20 setup here in Houston.

Should have done a little more research.  Had no idea that running pure antifreeze is a big no no.

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Post  sharkey Tue Feb 02, 2016 11:22 pm

yea pure antifreeze doesnt cool well. the only coolant i know that you can run without water is evans waterless coolant. stuff is supposed to work really well.

id be running max 70% antifreeze, 50/50 would be better. toss some water wetter or dei rad relief in it too.

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Post  wanczykj Wed Feb 03, 2016 4:57 pm

Thanks for the reply, going to run 80% water and 20% antifreeze and will throw in a water wetter and go from there.

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Operating temp Empty Try a low temp thermostat

Post  nateporchevy Wed Mar 09, 2016 11:08 pm

Try grabbing a low temp thermostat that opens at 160 instead of 180. this will offer more time for the heat to disapate
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Post  docwyte Thu Mar 10, 2016 8:21 am

Low temp t-stat won't make much difference, it's already open now.

As others have mentioned, run 50/50 water/antifreeze and then report back.

My car runs 170-180 on the street. I can't really get it over 200 even romping on it on the street. It'll go higher on the track...

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Post  ausgeflippt951 Tue Mar 22, 2016 9:33 am

Granted my motor is a 6.0L LS2 but on track I am seeing 195F, max, with a stock WP/Tstat and 95% water.  Stock 951 fans + switch. Street is the same.

Note that my radiator is the unit from Wizard Cooling (click here) and it works really, really well.
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Post  FrostedFlakeJake Tue Mar 22, 2016 9:51 am

Colin you switched over to f-body accessories right? What's your clearance like between the fans and the accessories with that radiator/fan combo?

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Post  ausgeflippt951 Tue Mar 22, 2016 10:14 am

FrostedFlakeJake wrote:Colin you switched over to f-body accessories right? What's your clearance like between the fans and the accessories with that radiator/fan combo?

It's tight but fine -- I had to make copious use of zip-ties.  Radiator is thicker by a substantial margin (perhaps 0.5-0.75").  The water pump pulley is the only tight space -- no idea why these suckers are so darn large.  

The closest anything gets to any of the rotating stuff is ~3/16", even though it looks closer in these pictures.  Not really a big deal.

Operating temp 20160317

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Post  majormojo Tue Mar 22, 2016 11:38 am

Collin, where did you get those shallow-head bolts for the alternator bracket? Are they a GM part? I have  pretty much the same setup and I'm concerned about how close the bolt head is to the belt. I've mitigated it a bit since this photo with a smaller idler pulley, but I'm still not thrilled with the gap.

Operating temp IMG_2987
Operating temp IMG_2986
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Post  FrostedFlakeJake Tue Mar 22, 2016 11:43 am

Mojo you can try a JIS bolt which should have a 14mm head. Not much but might buy you a mm or two

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Post  ausgeflippt951 Tue Mar 22, 2016 11:52 am

majormojo wrote:Collin, where did you get those shallow-head bolts for the alternator bracket? Are they a GM part? I have  pretty much the same setup and I'm concerned about how close the bolt head is to the belt. I've mitigated it a bit since this photo with a smaller idler pulley, but I'm still not thrilled with the gap.

Ah, they're actually standard bolts -- the bracket is countersunk a bit to help recess the bolt head. You could purchase an end mill, stick it in your drill press, and countersink it yourself.
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