rebuilt 390 Question
New User
Joined: Sep 2005
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you need to undestand what heads are on the 390... they could be low riser, mid riser or high riser... the trucks came with low riser and the flow tec's are the perfect fit for them... if you get the wrong headers they will continue to blow out the gasket and sound like POS... check the part# and talk to any engine shop and they will tell you which they are...
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Joined: Sep 2005
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The D2TE-AA are low riser truck heads.. Make a mock gasket from the head ports and put them up to your headers and see where the bottom of the header port flang is when the header bolt holes are lined up... if the header port is higher than the head port then they are the wrong headers... Go with the flow tec.s... this is my first post here... I am sorry where it has arrived... I tried to post just under the header pic'S... can anyone tell me how to put a pic of my truck in the upper left hand corner of my post's
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Joined: Aug 2001
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The D2TE-AA are low riser truck heads.. Make a mock gasket from the head ports and put them up to your headers and see where the bottom of the header port flang is when the header bolt holes are lined up... if the header port is higher than the head port then they are the wrong headers... Go with the flow tec.s... this is my first post here... I am sorry where it has arrived... I tried to post just under the header pic'S... can anyone tell me how to put a pic of my truck in the upper left hand corner of my post's
Standard riser is really a medium riser with a lower port roof. Low riser ports have a lower port floor.
Most headers are made for 68AE and later exhaust ports.
Josh
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Joined: Sep 2005
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Thank you...was the "low riser" jargden only used on the 427 heads??? some 20 plus years ago I got Hedman headers for my slightly buit 360 and had nothing but trouble with them so eventually I ripped them off and hung them on the garage wall... the next time I touched up the engine I got the flow tec's and compared them to the Hedmans... with the bolt holes lined up the bottom of the hedmans were 1/4 to 3/8 of an inch into the exhaust port... the flow tec's matched perfectly... the top of the header ports were the same... within 1/8 inch...
Certified Thread Hijacker
Joined: Aug 2001
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Thank you...was the "low riser" jargden only used on the 427 heads??? some 20 plus years ago I got Hedman headers for my slightly buit 360 and had nothing but trouble with them so eventually I ripped them off and hung them on the garage wall... the next time I touched up the engine I got the flow tec's and compared them to the Hedmans... with the bolt holes lined up the bottom of the hedmans were 1/4 to 3/8 of an inch into the exhaust port... the flow tec's matched perfectly... the top of the header ports were the same... within 1/8 inch...
The 427 High Riser was developed for Nascar and then banned. Ford re-tooled and developed the 427 Medium Riser and later in 67 the Tunnel Port.
For regular engines 58-66 is Low Riser and then 67+ is Standard Riser.
Josh
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Senior User
Joined: Oct 2012
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From: Arlington
The D2TE-AA are low riser truck heads.. Make a mock gasket from the head ports and put them up to your headers and see where the bottom of the header port flang is when the header bolt holes are lined up... if the header port is higher than the head port then they are the wrong headers... Go with the flow tec.s... this is my first post here... I am sorry where it has arrived... I tried to post just under the header pic'S... can anyone tell me how to put a pic of my truck in the upper left hand corner of my post's
Thanks for the heads up [no pun intended
] I just went out to check the header fittment and they match up within a 1/16" vertically to the head ports
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Senior User
Joined: Oct 2012
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From: Arlington
On the FE Network Forum I was recommended by a few guys, Barry R. being one of them, to use a comp 270H for my 390. They all told me that it would work a little better with my combo of truck and engine than the 268H, 260, etc. 75 F100 4x4 390/4speed 4:88 gears on 36's. Now it's just a suggestion, but again the Big name FE builders suggested that cam. I've read a lot of good about the 268H though, your call. I'd definitely consider it while the engine is out though.
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Senior User
Joined: Oct 2012
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From: Arlington
Well guys I finally got some free time to put this engine together and everything was going well until I put the Holley jets in the oil galley (passenger side head) and it disappeared down the hole
, I can still see it but I can't retrieve it, what do I do now?
, I can still see it but I can't retrieve it, what do I do now?
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Senior User
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From: Arlington
I think I'm alright with leaving the jet where it's at. Worst case I can see from my research is it could travel down to the #4 cam bearing but I really don't think that can happen and even if it did, would it be that bad? . I'm hoping it will get forced back up when I pre prime the engine. Any advice would be great!
Hotshot
Joined: Apr 2009
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From: Stanley, VA
It can't go any further than the deck. There's a 90 degree turn in the oil galley where the head gasket is.
Prelube it and make sure you have oil to the rocker arms.
If you can get a piece of wire that'll fit through the hole in the jet, see if you can fish it out. If you can, once it's out, take a center punch and punch a series of pin punches around the OD of the jet. That should raise the metal enough to keep it from dropping down again.
Prelube it and make sure you have oil to the rocker arms.
If you can get a piece of wire that'll fit through the hole in the jet, see if you can fish it out. If you can, once it's out, take a center punch and punch a series of pin punches around the OD of the jet. That should raise the metal enough to keep it from dropping down again.
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Senior User
Joined: Oct 2012
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From: Arlington
Thanks Mike, I was fairly sure this was not that big of a deal but I definitely wanted a second opinion.
You guy's can imagine the feeling I was having when my engine is 95% assembled (at 1:00 am)and oh ****
.
, I was fairly sure this was not that big of a deal but I definitely wanted a second opinion. You guy's can imagine the feeling I was having when my engine is 95% assembled (at 1:00 am)and oh ****
.
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Senior User
Joined: Oct 2012
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From: Arlington
It can't go any further than the deck. There's a 90 degree turn in the oil galley where the head gasket is.
Prelube it and make sure you have oil to the rocker arms.
If you can get a piece of wire that'll fit through the hole in the jet, see if you can fish it out. If you can, once it's out, take a center punch and punch a series of pin punches around the OD of the jet. That should raise the metal enough to keep it from dropping down again.
Prelube it and make sure you have oil to the rocker arms.
If you can get a piece of wire that'll fit through the hole in the jet, see if you can fish it out. If you can, once it's out, take a center punch and punch a series of pin punches around the OD of the jet. That should raise the metal enough to keep it from dropping down again.
thank you
Hotshot
Joined: Apr 2009
Posts: 14,333
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From: Stanley, VA
I went out and checked a head I have on the bench and see that I'm a little off.
The oil galley to the rocker arms doesn't go straight to the deck surface. It goes at an angle and intersects the head bolt hole.
Oil flows from the galley in the deck to the head bolt hole in the head, that's at the 90 degree turn. It then flows around the head bolt until it gets to the galley that you put the jet in.
Long story short, the jet can't even go as far as the deck like I first said. It can't travel more than an inch or so until it hits the head bolt.
In the picture the highlighted head bolt hole is the one the oil galley from the rocker arm stand intersects.
The oil galley to the rocker arms doesn't go straight to the deck surface. It goes at an angle and intersects the head bolt hole.
Oil flows from the galley in the deck to the head bolt hole in the head, that's at the 90 degree turn. It then flows around the head bolt until it gets to the galley that you put the jet in.
Long story short, the jet can't even go as far as the deck like I first said. It can't travel more than an inch or so until it hits the head bolt.
In the picture the highlighted head bolt hole is the one the oil galley from the rocker arm stand intersects.
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Senior User
Joined: Oct 2012
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From: Arlington
Well that makes me feel a lot better if I can't get it fished out.
Great information and I appreciate you taking the time to check out the pathway of the oil galley.
I should have this thing in today and hopefully fired up
Great information and I appreciate you taking the time to check out the pathway of the oil galley.
I should have this thing in today and hopefully fired up
