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Author Topic:   Hot Stuff. And Yes, I did a search :)
Limited Mod 57
Dirt Forum Racer

Total posts: 86
posted July 28, 2005 08:44 AM  
Hereís the configuration. The car has been sitting for 3.5 years. The lower end of the engine was from a blower motor, weíve added a fairly radical cam (donít have the cam sheet in front of me and I donít remember the specs), modified (read larger valves, springs, etc) Vortecs, single plane high rise manifold and Holley 3310.

Yes, we know it low compression and such, but most of the time the track is dry, dry, slick, so that helps even things out. And frankly, Iím in it for the fun.

Also, weíre running the highest octane (93) pump gas available. Considering the compression ratio is probably only around 9.1:1, we felt it would be ok.

So hereís the problem. Sitting in the staging area, the temps are getting up to around 200, 210 (during the race, it didnít seem to change much either way, i.e. lower or higher). Also, after its initial race last weekend, once I was back at the shop, took the radiator cap off and it took almost 2 gallons of water to fill the car back up.

Anyway, 2 questions:

1) Any idea as to why she getting so hot just sitting there idling?
2) Where did all the water go? Boiled out? (Related note: I drained 2 cups of oil last night into a measuring cup to see if the oil looked murky or chocolate milk like. It looked fine)

Appreciate any help yíall

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artie727
Dirt Full Roller

Total posts: 26
posted July 28, 2005 09:36 AM  
If the radiator cap has been sitting as long as the car has been it is PA BON (NO GOOD)
Fill the radiator and install a NEW 20-25 psi cap and try that. With my experience with gasoline engines, radiator caps don't last long. You can also install a catch bottle on your overflow line so that the radiator can **** back in any of the water that overflowed. Your water fill should be the highest point of your cooling system and get ALL of the air out.

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Artie Perilloux
A & M Motorsports

Limited Mod 57
Dirt Forum Racer

Total posts: 86
posted July 28, 2005 11:42 AM  
Artie, I'll check the cap. And yes, the water fill is at the highest point in the system (system compose of radiator, hoses, ponit on manifold where hose connects, etc).

Thanks

"pa bon" Sounded Cajun/French. Checked your profile. Confirmed my assumption Love the Quarters. We're there at least 3 times a year.

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Raz_900
Dirt Forum Champ
Total posts: 635
posted July 29, 2005 08:26 PM  
200-210 is about perfect for making best power. Too much below 180 and you start losing power and/or accelerate wear from cold oil and parts that haven't expanded to size properly.

I'd replace the cap as mentioned above and see if it still loses coolant. If it was sitting that long in an area that sees sub 30* weather, it's possible something cracked or a head gasket is leaking. Most racers run plain water and draining the rad won't get all the water out of the block unless you pull a drain plug.

Good luck!!

Limited Mod 57
Dirt Forum Racer

Total posts: 86
posted August 01, 2005 10:33 PM  
....If it was sitting that long in an area that sees sub 30* weather, it's ....

Rarely do we see temps like that. I'm in Houston. And the car sat in a shop, up on jackstands, during its "hibernation".

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kylejs2005
Dirt Roller

Total posts: 5
posted August 02, 2005 09:38 PM  
If you are running a modified the radiators are smaller, tru running alcohol which burns cooler or changing things fan wise...there have been plenty of posts of people beng too hot, what solves the problem if u just spend the mney and go to alcohol

racer17j
Dirt Forum Champ
Total posts: 5390
posted August 03, 2005 05:02 PM  
you have a cracked head. we had the same problem last year. the vortecs can only be cut so much before the walls get thin. once this happens, its very easy to crack a head. most likely its seeping when its being raced and blowing out of the headers/tailpipes. just my 2 cents?

Limited Mod 57
Dirt Forum Racer

Total posts: 86
posted August 15, 2005 06:51 PM  
Believe I've found the problem.

Ran compression check and all 8 cylinders read within 10#s (maybe closer to 5#s) of each other.

Pulled the intake, water seepage left a trail around the front driver's side bolt hole.

Cleaned everything up and when dry fitting the intake, as I tightened down on the manifold, found a crack in the manifold in the same area where the seepage/water trail was.

So I think I've found the source of the leak.

Now I just have to figure out why the manifold cracked where it did.

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[This message has been edited by Limited Mod 57 (edited August 15, 2005).]

[This message has been edited by Limited Mod 57 (edited August 15, 2005).]

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