temp questions - Team Camaro Tech
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post #1 of 6 (permalink) Old Aug 26th, 10, 11:18 PM Thread Starter
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wayne
 
Join Date: Apr 2009
Location: palmdale, ca
Posts: 127
temp questions

ok guys i have a 406 with 10.89 to 1 comp. timing set at 37.5 total. i have a three core ALUMINUM radiator, 106 thermostat with little hole for flow, stock sytle long water pump,and 16" electric fan.

the car ran at 190 all day. I changed the heads to afr and i moved the temp sensor to rear of the intake. now i run 210-225 all the time. is this normal? or what should i change?
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post #2 of 6 (permalink) Old Aug 27th, 10, 12:15 AM
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Steiner
 
Join Date: Mar 2009
Location: Lyman, SC
Posts: 8,348
Re: temp questions

The back port on a lot of intakes is a deadhead with no flow. Also, did you set your timing number going by the dyno or some other means? Mine was set on the dyno and only needed 30 degrees with AFR heads and 10.11:1 compression. It runs 175 degrees going down the road with a 180 degree thermostat and rarely goes over 180 when sitting. This is with an ECT sensor in the front of the intake.

'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 #3 of 6 (permalink) Old Aug 27th, 10, 12:37 AM Thread Starter
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wayne
 
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Re: temp questions

the timing was set with one of the new sytle timing lights.
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post #4 of 6 (permalink) Old Aug 27th, 10, 12:46 AM
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Steiner
 
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Location: Lyman, SC
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Re: temp questions

No, I mean how did you decide that 37.5 degrees was the best amount? AFR heads do not need as much timing as a stock or lower performance head. Even most tests I've seen with Vortecs usually run 32-34.

Since it's so easy to dial back your timing, try knocking it down to 30 to see how it runs and then you can add some back if it feels like it'll take it.

Also if that rear port does not have a crossover to the other side your sensor is in fairly stagnant water so it's most likely going to read high. Especially since it's on the back side of the engine.

'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 #5 of 6 (permalink) Old Aug 27th, 10, 09:16 AM Thread Starter
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wayne
 
Join Date: Apr 2009
Location: palmdale, ca
Posts: 127
Re: temp questions

Would it be smarter to put the sensor back in the side of the head? I will drop timing and see if that will help.

I plan to get it on DYNO soon. I just wanted to work out all bugs before.
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post #6 of 6 (permalink) Old Aug 29th, 10, 08:01 AM
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Steve
 
Join Date: Jun 2005
Location: Melbourne, Australia
Posts: 2,864
Re: temp questions

The 16" thermo will move much less air compared to an OE 7 blade with clutch.
Often the thermo fan shrouds are very restrictive too.
Got pics?

Nov 68 Van Nuys. 327 floor-shift-auto, Frost Green and not much else when new.

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