Radiator help neede asap - Team Camaro Tech
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post #1 of 27 (permalink) Old Jul 11th, 10, 06:33 PM Thread Starter
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Radiator help neede asap

I have a 67 r/s automatic 327/275 ----I recently updateded the engine and it's up in the 420-430hp range. I don't drive the car alot which is problem 1. I also have a cheap aftermarket radiator.

Last week I had the situation of after driving the car for a bit and stopping for gas or whatever ...go to start the engine back and it's too hot to start back up and have to sit there like a jerk waiting to cool down.

Had radiator taken out because the hoses aren't hot at all. Get the radiator all cleaned out and ready to go from a decent local shop ....and he's recommending that yes proboboly soon I need to upgrade it due to the higher HP output.

We tried again today and the car severely overheated ... antifreeze all over ....big mess ...so bottomline .... I need a new quality radiator for a 1967 R/S...asap and whevere to purchase it .... Please can you guys help me.
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post #2 of 27 (permalink) Old Jul 11th, 10, 07:13 PM
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Al
 
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Re: Radiator help neede asap

I have one of these - works great. Make sure you have a good fan and shroud.

http://www.summitracing.com/parts/SU...e%7c5.7L%2f350


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post #3 of 27 (permalink) Old Jul 11th, 10, 07:50 PM
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Terry
 
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Re: Radiator help neede asap

also if you have a fan clutch make sure it is working right...my 355 w/aluminum heads seemed to be running hot after even a short drive (didn't overheat though), turned out the fan clutch was worn. I swapped in a new one, runs in the proper heat range now. I only have a 3 row radiator- also installed an auto trans cooler.
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post #4 of 27 (permalink) Old Jul 11th, 10, 10:55 PM
Dude
 
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Re: Radiator help neede asap

If this dont sound familiar. I had exact problem with my 67. Upgraded motor to about same hp. with stock radiator and had that cool down period as well as poor flow issues. I shopped around like crazy and finally just ordered from Ron Davis with the shroud and fan assembly. The reviews are all excelent and should recieve next week. Everyone says great choice, due to the reliability and its quite a nice looking radiator as well.
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post #5 of 27 (permalink) Old Jul 12th, 10, 03:57 AM
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Steps
 
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Re: Radiator help neede asap

Quote:
We tried again today and the car severely overheated ... antifreeze all over
How the hell just testing out you let things get that far out of control....and if it wasnt hard to do, assuming thecap, cores, thermost fan shroud is all ok....then blown head gasket....run a HC test on the radiaror.

Dump a stock radiator in.

My Spelling is not incorrect...it is creative

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post #6 of 27 (permalink) Old Jul 12th, 10, 12:52 PM
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Michael
 
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Re: Radiator help neede asap

I run the Summit direct fit radiator like BPOS suggests in my '67 SS/RS w/AC. Aluminum Holley heads, SysteMax II kit, so similar HP to your application. No problems.

Make sure you get the Summit factory shroud supports if you order the radiator.
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post #7 of 27 (permalink) Old Jul 12th, 10, 06:25 PM
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Steiner
 
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Re: Radiator help neede asap

I've got one of these on the engine in my signature along with a standard duty clutch fan and stock shroud. Last week after getting back from a drive I left it running for about a half hour in the driveway while fiddling with my fuel injection. It was almost 100 and the heat index was well over that and coolant temp never got over 180.

http://cgi.ebay.com/ebaymotors/ALL-A...Q5fAccessories

'69 Camaro
Dart 400-AFR 195-224/224 HR-Powerjection III TB with F.A.S.T. Sportsman XFI
TKO 600-Moser 3.42-Detroit Truetrac
500hp/538lbft

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'69 Camaro Beater-SFT 327-M20-Moser 4.10-sold
'02 Z/28 vert-stock-sold and totaled
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post #8 of 27 (permalink) Old Jul 12th, 10, 07:27 PM Thread Starter
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Re: Radiator help neede asap

well, a quick 10 mile ride -- so maybe my choice of wordss was off
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post #9 of 27 (permalink) Old Jul 13th, 10, 04:41 PM
 
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Re: Radiator help neede asap

I am also running hot in my 69 Camaro with a 383 stroker with separate tranny cooler. I cannot stay below 215 degrees if stuck in any sort of traffic.... I am looking at either the Be Cool SB or BB radiator but the BB is a lot wider and wondered if the battery or regulator will have to be moved. Also, any insight on the shroud (mine is a SB) will be an issue on mounting back in place... I also want to stay with the current shroud and my stock clutch fan. I have been told 383's run hot anyway..but the 215 just scars me to let it alone.
Any advice would be good.
Thanks
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post #10 of 27 (permalink) Old Jul 13th, 10, 05:37 PM
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Re: Radiator help neede asap

If your car gets hot sitting still and temp is ok when moving, it is an air flow issue.

If the car gets hot when driving then it is a coolant flow issue.

So pdm when did the car overheat, does it stay cool enough sitting in the driveway idling?

6t8 vert If the car gets hot sitting still you need to look at things like the fan and shroud. How far in the shroud does the fan sit? Clutch or flex?
But to answer the question the BB radiator will fit, it just uses a pair of holes further out on one side, nothing in the way. You will need to get a SB with A/C fan shroud though if you want to run mechanical fan.
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post #11 of 27 (permalink) Old Jul 13th, 10, 07:37 PM
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Re: Radiator help neede asap

I have a 383 with a 700r4 is my 67. I run an aluminum radiator with dual electric fans pulling over 2700 cfm. The fans kick on at 210 and drop it down to 180 in a heartbeat. Its expensive but probably one of the best purchases I've ever made for my car. Overheating on SoCal freeways is never a concern anymore.

http://streetrodstuff.com/Products/P...up.php?id=1988

Phil<br />67 Camaro SS 350
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post #12 of 27 (permalink) Old Jul 14th, 10, 12:30 PM
 
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Re: Radiator help neede asap

Shadow53 - Thanks for the update on the 383 you are running. I see you went to the electric fans. I was hoping to use my existing shroud and clutch fan....but my shroud is a SB and the dimension per the SRS is about 2 inches wider... one suggestion was to use a SB shroud with AC, which according to the info in Rick's allows the inside the tank dimension to be 23 inches... so, maybe this is an option...
If you have some pics you could send to my email would be good to see your fit up on the electric fans. My email is [email protected].
Thanks.
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post #13 of 27 (permalink) Old Jul 14th, 10, 12:50 PM
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Russ
 
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Re: Radiator help neede asap

Could be more to it than just your radiator.

I'm also in the 415+hp bracket but run a 4 row /core radiator, a Derale flex fan w/stock shroud, a Summit Racing high volume water pump, and a 165F thermostat and my motor can sit at idle for more than 30 minutes without the temp raising above 190. Normal driving I'm at 175-180F.

What type of water pump do you have, what type of fan, thermostat....... etc.

Russ (RJ)
The Garlic Capital, Gilroy,CA

(sold June 15,2014) 1968 RS convertible that is not quite stock

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post #14 of 27 (permalink) Old Jul 14th, 10, 05:15 PM
 
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Re: Radiator help neede asap

Good questions.
I am running a stock water pump, and a 160 degree thermostat... I changed the flex fan out last summer and put on a clutch fan (stock). I paid close attention to the position of the fan in the shroud, and it is in the correct position. I also added a water wetter this past month to see if it would drop the temp 20 degrees (not)... the radiator does have some corrosion inside (you can see the corrosion in the top rows) but not really bad. I also am running a transmission cooler separate form the radiator. It is placed in the front of the radiator (lower and left side)... I was thinking this could be an additive in the higher temps...but again, a 383 apparently does run hot. I have about 410hp, so maybe this puppy just does run hot... but am trying to get the temps down. I have not chagned out the anti-freeze and flushed the radiator... maybe this could help??? but do not know...
Other than that the car is very good, tight, drives great, has a great motor, smooth tranny, but just is a hot temp car... Any suggestions or things you have found to help your hot 383 stroker or SB with high temps would be great.
Thanks
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post #15 of 27 (permalink) Old Jul 14th, 10, 11:28 PM
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Al
 
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Re: Radiator help neede asap

Not sure where you heard that 383s run hot....that's a new one. Even if you're making 400 some odd horsepower, your not making 400HP idling in traffic or driving down the freeway at 65. With the Summit radiator I linked above, a 180 thermostat, a stock shroud and a 7 blade clutch fan my 383 runs at 180. Hot day, cold day, all day. There's nothing magical about it and you don't need some high zoot thousand dollar radiator to accomplish it - just make sure that what you have is up to the task. I wish I'd known about the rad that Steiner linked to - I coulda saved a hundred bucks!


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