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#41
04-06-2026, 09:01 AM
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I just thinking it's worth a try. I tried that resistor plate on our IA2 build and didn't work out for us. Put a 160* thermostat in and works so much better. The 160* stat starts opening at 160* from my testing. I also ran the cooling lines from the back of the heads to the water crossover and also ran one off the coolant line to the water pump. I also left the bypass in place. I felt this setup helped circulate the coolant through the block to warm up the engine and once the 160* stat opens engine starts cooling. My fan is controlled manually and I have a 185* sensor on it for automatic mode. Were also running a electric water pump. I guess I'm just wondering if your restrictor plate is impeding flow down the track. Plus the other thing I don't like about the restrictor plate is that the engine struggles to warm up properly, which also affects oil temp before a run down the track. Just my thoughts.
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68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 3:90 gear. 28" slick. Best so far 9.95@135 mph. 1.39 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exhaust 950 Quickfuel. |
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#42
04-06-2026, 10:42 AM
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A often overlooked point of flow restriction in aftermarket intakes is this..
The head to intake water passage is restricted by 26%.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#43
04-06-2026, 02:06 PM
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Listen to Steve a bit.
My dumb ass since 60s-70s still hold true.
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If you cant drive from gas pump to gas pump across the map, its not a street car. http://s207.photobucket.com/albums/b...hop/?start=100 |
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#44
04-06-2026, 04:14 PM
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chuckies76ta - thanks for that info. Definitely worth a try to see if it helps or hurts and easy enough to do.
steve25 - next time the intake is off I will definitely have a look at the crossover opening size
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1965 GTO Cameo White, Red Interior - 389, ST300 numbers matching 1965 GTO Black, Black Interior "Post" car - 389, M-20 numbers matching 1965 GTO Silver, Black Interior 100% dedicated drag car w/1968 400(461), 16x Heads, TH400, 3.90 9" Rear 1.656 60' 7.566 90.057 (1/8th) 1971 GTO Black (orig. Quezal Gold), Gold Interior - 400, TH400 numbers matching 1972 GTO Cardinal Red, Black Interior - 455, TH400 almost numbers matching |
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