header tube size

Myron Piatek · 11-19-2011, 01:21 PM

Several IHRA and NHRA 360 Stockers, including myself, use off the shelf TTI 1 5/8"-1 3/4" step headers with good results. But they only manufacture Mopar applications.

K Stubbs · 11-19-2011, 08:48 PM

Whatever Greg Hill is running.

Wade_Owens · 11-20-2011, 12:48 PM

Either size will work well on a 350. Don't fall into the "equal length" trap. Just buy a merge collector from Performance Welding. The larger header may want to be shorter on the primaries. If you don't buy a merge collector, consider buying or building a header that fires in rotation into the old style collector. But, the bottom line is, it's all theory until you get an ET slip........

Wade O

chassis1 · 11-20-2011, 06:50 PM

Wow, Wade you sound like a real header builder......lol...but you forgot to tell him about the steps in the header and what purpose they serve....

1.625 is the way to go and when you measure that exhaust port, I bet it is really close to that size.....

Chassis1

Wade_Owens · 11-20-2011, 08:02 PM

Quote:

Originally Posted by chassis1

Wow, Wade you sound like a real header builder......lol...but you forgot to tell him about the steps in the header and what purpose they serve....

1.625 is the way to go and when you measure that exhaust port, I bet it is really close to that size.....

Chassis1

Lol, I've wasted enough money on headers and hardly ever see a gain. Use the KISS method.........

Wade O

chassis1 · 11-21-2011, 12:35 AM

for the combination you run, there are very interesting ways that are not simple to make the small engines move more air then ever thought. Believe it or not, it is done with the 4 into 1 and not the tri-y because of the cfm of the smaller heads......sometimes you can speed the air up too fast and the smaller engines do not like it.....

Chassis1

Wade_Owens · 11-21-2011, 01:27 PM

Quote:

Originally Posted by chassis1

for the combination you run, there are very interesting ways that are not simple to make the small engines move more air then ever thought. Believe it or not, it is done with the 4 into 1 and not the tri-y because of the cfm of the smaller heads......sometimes you can speed the air up too fast and the smaller engines do not like it.....

Chassis1

MEXJOE · 11-21-2011, 06:34 PM

BOY! You said it !
I've got a bunch of expensive stuff I'm gonna make into wind chimes and try to sell on E-BAY.
"Tune around what you have" is the best advice I ever got.
KISS method.........

Quote:

Originally Posted by Wade_Owens

Lol, I've wasted enough money on headers and hardly ever see a gain. Use the KISS method.........

Wade O

chassis1 · 11-21-2011, 08:07 PM

everyone seems to forget that the cam is still the brain of this deal when it comes to headers. most of the time, off the shelf STOCKER cams are still very old designs and are not made to be as efficient as some headers are built or bought, no matter what your engine guys chooses.....truth is most engine guys miss on the cam and go to what they call, " ol' reliable cams...." but yet the racer seems to think better than the engine builder sometimes...and looks at his WHOLE combination......

Chassis1

Dave1695 · 11-21-2011, 01:26 PM

Thank you for the feed back gentlemen, I was pretty well sold on 1 5/8 to 1 3/4 tube size, based on what I had observed around the pits, that apeared to be the most popular small block set up. I will let the manufacturer sell me on collector style. Happy Holidays to all of you.

11-19-2011, 01:21 PM	#1
Myron Piatek VIP Member Join Date: Nov 2001 Location: Florida Posts: 1,542 Likes: 34 Liked 138 Times in 51 Posts	Re: header tube size Several IHRA and NHRA 360 Stockers, including myself, use off the shelf TTI 1 5/8"-1 3/4" step headers with good results. But they only manufacture Mopar applications. Last edited by Myron Piatek; 11-19-2011 at 01:24 PM.

11-19-2011, 08:48 PM	#2
K Stubbs Member Join Date: Aug 2008 Location: Benton, Arkansas Posts: 402 Likes: 0 Liked 20 Times in 3 Posts	Re: header tube size Whatever Greg Hill is running.

11-20-2011, 12:48 PM	#3
Wade_Owens Senior Member Join Date: Jul 2007 Posts: 578 Likes: 0 Liked 3 Times in 1 Post	Re: header tube size Either size will work well on a 350. Don't fall into the "equal length" trap. Just buy a merge collector from Performance Welding. The larger header may want to be shorter on the primaries. If you don't buy a merge collector, consider buying or building a header that fires in rotation into the old style collector. But, the bottom line is, it's all theory until you get an ET slip........ Wade O

11-20-2011, 06:50 PM	#4
chassis1 Junior Member Join Date: Nov 2003 Location: drag city, ne Posts: 92 Likes: 1 Liked 9 Times in 3 Posts	Re: header tube size Wow, Wade you sound like a real header builder......lol...but you forgot to tell him about the steps in the header and what purpose they serve.... 1.625 is the way to go and when you measure that exhaust port, I bet it is really close to that size..... Chassis1

11-21-2011, 12:35 AM	#6
chassis1 Junior Member Join Date: Nov 2003 Location: drag city, ne Posts: 92 Likes: 1 Liked 9 Times in 3 Posts	Re: header tube size for the combination you run, there are very interesting ways that are not simple to make the small engines move more air then ever thought. Believe it or not, it is done with the 4 into 1 and not the tri-y because of the cfm of the smaller heads......sometimes you can speed the air up too fast and the smaller engines do not like it..... Chassis1

11-21-2011, 08:07 PM	#9
chassis1 Junior Member Join Date: Nov 2003 Location: drag city, ne Posts: 92 Likes: 1 Liked 9 Times in 3 Posts	Re: header tube size everyone seems to forget that the cam is still the brain of this deal when it comes to headers. most of the time, off the shelf STOCKER cams are still very old designs and are not made to be as efficient as some headers are built or bought, no matter what your engine guys chooses.....truth is most engine guys miss on the cam and go to what they call, " ol' reliable cams...." but yet the racer seems to think better than the engine builder sometimes...and looks at his WHOLE combination...... Chassis1

11-21-2011, 01:26 PM	#10
Dave1695 Member Join Date: May 2009 Posts: 160 Likes: 0 Liked 15 Times in 11 Posts	Re: header tube size Thank you for the feed back gentlemen, I was pretty well sold on 1 5/8 to 1 3/4 tube size, based on what I had observed around the pits, that apeared to be the most popular small block set up. I will let the manufacturer sell me on collector style. Happy Holidays to all of you.