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#1
01-19-2004, 07:51 AM
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I wondering if adding the heater core nipple on the drivers side head and passenger side head to the crossover is worth the trouble?
I seen here and other places cooling the back of the heads is maybe worth some horsepower? Can someone give me the part numbers? Thanks |
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#2
01-19-2004, 07:51 AM
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I wondering if adding the heater core nipple on the drivers side head and passenger side head to the crossover is worth the trouble?
I seen here and other places cooling the back of the heads is maybe worth some horsepower? Can someone give me the part numbers? Thanks |
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#3
01-19-2004, 08:00 AM
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The GM PN is 499744
with out questions there can be no answers 1969 Grand Prix 9.947@133.53(1.358) 6.246@107.91(1.342) WARPed Tepee Forums alex@pontiacgroup.com
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1994 Formula 535ci NA CV-1 - single 1050 with c14 - 940hp@7000/825tq@5200 Pontiac Powered 4th Gen Project Progress 
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#4
01-19-2004, 08:08 AM
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#5
01-19-2004, 02:37 PM
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Is that P/N the heavier steel parts or the lightweight tin pieces?
Tom V. 
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#6
01-19-2004, 03:41 PM
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Guy,
Hp gains, if any, would be due to uniform lower engine temps and improved cyl. bore stability. The claims that I have seen for this mod are that it lowers coolant temps a few degrees, which is always welcome. Les 66 GTO Coupe,455/trips,700r/2500stall,12bolt/3.08,1.79/13.01/104.5 68 GP daily driver and 2004 Route 66 Tour participant under restoration -------------------------- Better lucky than good
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Les Iden ---------------------------- '65 Buick Sport Wagon Custom, 340, T350, 3:23 '66 GTO Post/468, 700R4, 3.31 (Mike's as of 9-16) '68 Grand Prix/455, dual AFBs, T400, 2:93 posi (sold) '72 TA tribute/461, T400, 3.08, (Russ's as of 9-16) '97 Mitsubishi Eclipse Spyder Turbo, Konis, 5 speed '09 Torrent GXP, nav, Sun & Sound pkg., Bilsteins |
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#7
01-19-2004, 05:28 PM
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I did it and lost about 10-15 degrees with that being the only change.My 180 thermostat used to be open all the time after warm-up and temp. ran around 195.Now the thermostat actually opens and closes at a constant temp..I think it's worth it.
 AlIt ain't no feakin' camaro!
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Merry Christmas,Happy Halloween, God bless America, and my Mother and Father.If you don't like your freedoms,ignore them and they'll go away! 
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#8
01-19-2004, 05:43 PM
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That's the only number there is. Last time I bought one from the dealer, it was stamped steel. I'd bet you can't get the heavier ones any more.
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#9
01-19-2004, 06:19 PM
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That's what they are, about half the thickness of the orignals. You can't even get a good freeze plug any more as they are about half the thickness as they were a few years ago. I had a set of freeze plugs laying around that i got from H-O Racing 15 years ago and never used, they are much thicker than the ones you get today and we used them in my new street engine that is sitting on the dyno now.
Robert Williams
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"Three may keep a secret, if two are dead" ~ Benjamin Franklin ~ |
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