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Old Jan 25, 2006 | 06:23 PM
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flexybronc
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Header Tube Size

Ha, got anouther question. Does anyone have any suggestions on which header size i should run and why? I am looking at 1-5/8 or 1-3/4 both with 3" collectors and they are both fenderwell headers. Have regular in chasis headers on my other bronco and hate them. So if you look at my last thread i started you can see my motor combo to give you an idea what i am doing. Thanks
 
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Old Jan 25, 2006 | 09:02 PM
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garypettengill
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Originally Posted by flexybronc
Ha, got anouther question. Does anyone have any suggestions on which header size i should run and why? I am looking at 1-5/8 or 1-3/4 both with 3" collectors and they are both fenderwell headers. Have regular in chasis headers on my other bronco and hate them. So if you look at my last thread i started you can see my motor combo to give you an idea what i am doing. Thanks
I think the general concensis is that the 1 5/8 primary tube is the better choice as it tends to help keep the velocity of the exhaust gases up when compared to the 1 3/4. The higher velocity would help pull off the gases from the combustion chamber thus helping to fill the chamber with a purer mixture of fuel and air for the next stroke.
 
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Old Jan 26, 2006 | 06:50 AM
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Ha thanks for the reply. That is the size i was leaning towards to help keep the torque numbers up also. I got anouther question for you guys if any one sees it? What size crank pilot diameter do i go with when i order my torque converter. 1.375 or 1.850.
 
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Old Jan 26, 2006 | 07:17 AM
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I just happen to have my engine on a stand, 1.375".
 
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Old Jan 26, 2006 | 03:36 PM
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Originally Posted by garypettengill
I just happen to have my engine on a stand, 1.375".
Thanks. that was great timing wasnt it.
 
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