Cold Blooded - Team Camaro Tech
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post #1 of 22 (permalink) Old Dec 30th, 05, 10:07 AM Thread Starter
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Cold Blooded

I'm running a 350 with a Performer RPM intake and a 650 double pump holley. Electric Choke. The car starts right up however it takes for ever to 'warm up'. I used to have the Performer manifold and it was fine, but with the new manifold, once the car idles down after a cold start it pops back through the carb. Once it's warm it runs fine... any suggestions?
I'm only running a 180* thermostat, should I got to a 190*
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post #2 of 22 (permalink) Old Dec 30th, 05, 12:03 PM
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Re: Cold Blooded

Did you block the heatriser passages? Is it an Air Gap? If either one of these are true you are stuck with a cold blooded engine. A 190 thermostat will help.
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post #3 of 22 (permalink) Old Dec 30th, 05, 02:06 PM
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Re: Cold Blooded

Are you sure the thermostat isn't stuck open ?
And the above applies too.

68 Camaro~LSx ~all motor
1.54 60'--6.95 @ 98.45 660'--10.96 @ 121.53
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post #4 of 22 (permalink) Old Dec 30th, 05, 03:39 PM Thread Starter
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Re: Cold Blooded

T-stat does not appear to be stuck. It seems obvious once it opens. It's not an air gap, and I didn't block off the heatriser passage, but I also don't recall whether it may have been blocked out of the box.
I guess I'll try the 190 t-stat. Or higher? I've never had a cooling problem...
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post #5 of 22 (permalink) Old Dec 30th, 05, 04:56 PM
 
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Red face Re: Cold Blooded

He, He!!

I have to ask if the T-Stat is put in right-side-up??

B/c I have done this and sure enough, she ran fine but was cold-blooded!!

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post #6 of 22 (permalink) Old Dec 30th, 05, 10:40 PM Thread Starter
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Re: Cold Blooded

Quote:
Originally Posted by pdq67
He, He!!

I have to ask if the T-Stat is put in right-side-up??

B/c I have done this and sure enough, she ran fine but was cold-blooded!!

pdq67
I wasn't drinking when I put it in, but I've made a few boneheaded moves in the past. I suppose I'll find out when I put in the 190
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post #7 of 22 (permalink) Old Dec 31st, 05, 09:23 AM
 
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Red face Re: Cold Blooded

Not a bone-headed move, but I rather just wanted to get the job done b/c it was cold, I was wet and I flat just flipped the T-Stat in my hand as I dropped it in the hole after putting some good old Indianhead Shellac Gasket Cement around the hole while trying not to get that sticky crap all over everything else and keeping the gasket lined up..

My bad but it still worked, although, cold-blooded..

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post #8 of 22 (permalink) Old Dec 31st, 05, 10:18 AM Thread Starter
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Re: Cold Blooded

Quote:
Originally Posted by pdq67
Not a bone-headed move, but I rather just wanted to get the job done b/c it was cold, I was wet and I flat just flipped the T-Stat in my hand as I dropped it in the hole after putting some good old Indianhead Shellac Gasket Cement around the hole while trying not to get that sticky crap all over everything else and keeping the gasket lined up..

My bad but it still worked, although, cold-blooded..

pdq67

I didn't mean to dig at you, sorry if you took offence. I was more taking a dig at myself.
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post #9 of 22 (permalink) Old Dec 31st, 05, 05:07 PM
 
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Talking Re: Cold Blooded

No guy, not at all b/c years later when I had to put another new T-Stat in, I found out that I was a bone-head like you said!

He, He!

I put (3) T-Stats in my old '87 Chevy Sprint ER, 3-banger corn-popper motor b/c as regular as a clock, right about 75,000 miles the darn thing would stick open!

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post #10 of 22 (permalink) Old Dec 31st, 05, 05:13 PM
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Re: Cold Blooded

Performer RPM has no crossover passage, so it's going to be touchy until the floor of the manifold warms up from oil in the lifter valley and heat conducted from the heads. Make sure your heat riser valve is either wired open, gutted, or replaced by a spacer, or the exhaust gases from the pass. side head will have no place to go with the valve closed.

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post #11 of 22 (permalink) Old Dec 31st, 05, 09:13 PM Thread Starter
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Re: Cold Blooded

Open element cleaner and headers...
Looks like I'll have to live with it.
Is the consensus that the 190* t-stat will be better than the 180*?
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post #12 of 22 (permalink) Old Dec 31st, 05, 09:20 PM
 
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Thumbs up Re: Cold Blooded

John,

Please, would you please run through the "goods and the bads" of the heat riser thing/blocked heat intake manifold passages for the benefit of the younger guys....

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post #13 of 22 (permalink) Old Jan 1st, 06, 01:20 PM
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Re: Cold Blooded

Quote:
Originally Posted by eville
Open element cleaner and headers...
Since you mentioned the air cleaner, I thought there might be some confusion as to what the heat riser is. Beware that the heat riser is not the same thing as the hot air feed to the air-horn on a stock air cleaner setup. The head riser system starts with a weighted butterfly installed in one of the exhaust down-tubes (usually driver's side) with a coil spring. When the spring is cold, the butterfly closes and blocks exhaust gases from exiting the down-tube. Instead the exhaust gases are forced through the heat riser passage in the floor of the intake and exit the down-tube on the opposite side. Many after market heads and intakes do not have a heat riser passage or they are blocked off by a metal plate installed in the intake manifold gasket.

Dave
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68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
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post #14 of 22 (permalink) Old Jan 1st, 06, 02:40 PM
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Re: Cold Blooded

Quote:
Originally Posted by pdq67
John,

Please, would you please run through the "goods and the bads" of the heat riser thing/blocked heat intake manifold passages for the benefit of the younger guys....

pdq67
Dave covered the layout in his post above (although the valve is on the passenger side); the reason for it is to get immediate heat (hot exhaust gases) to the floor of the intake plenum in cold weather to improve the rich air-fuel mixture atomization and reduce "wetting-out" of raw fuel on the cold walls of the intake runners while the engine is warming up. If you live in Florida, Phoenix, or SoCal, you can probably do without it, but if you live where it gets cold, you'll have lousy cold driveability without it.

JohnZ
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post #15 of 22 (permalink) Old Jan 1st, 06, 05:24 PM
 
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Thumbs up Re: Cold Blooded

Thanks John.

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