Trick Flow heads / LT4 intake Don't line up!
06-24-2006, 03:50 PM
#1
Trick Flow heads / LT4 intake Don't line up! Just went to install a set of trick flow heads ported by lloyd elliot along with an LT4 intake that was also port matched by him. First let me say the porting looks great! However, when we went to bolt the intake down, the holes in the intake aren't even close to lining up with the holes in the heads. Has any one else had these issues? Also, the heads had the tiny holes for the tabs in the intake gaskets to press into. These didn't line up either. Whats the deal? Do we need to drill the holes in the intake to make it line up with the holes in the heads?
Now I'm wondering what good port matching the intake was if we change the holes to make it bolt up. Right now its like the intake is wider from one bolt hole to the one on the opposite side, than the holes in the heads. I don't know the history of the block, but the pistons measure to be .007" out of the hole. I don't think the block could have been decked an excessive amount since they are only 7 thousandths out?
What could be the problem, other than poor quality heads?
Now I'm wondering what good port matching the intake was if we change the holes to make it bolt up. Right now its like the intake is wider from one bolt hole to the one on the opposite side, than the holes in the heads. I don't know the history of the block, but the pistons measure to be .007" out of the hole. I don't think the block could have been decked an excessive amount since they are only 7 thousandths out?
What could be the problem, other than poor quality heads?
06-24-2006, 04:00 PM
#4
From what lloyd said, he would port match the heads to the intake, therefore making them line up. The issue is not the ports lining up, its the bolt holes that hold the intake to the heads. I think he would have told us if we sent him the wrong heads.
06-24-2006, 04:43 PM
#5
I just set an LT1 intake on the engine and it doesn't line up either. It fits exactly the same as the LT4. The bolt patterns are the same. The runners lining up are not an issue, since they have been port matched.
If the intakes were the difference and we have LT1 style heads, why doesn't the LT1 intake fit?
I then set the LT4 intake on an LT1 engine and stock heads. It will not work, but its not because of the bolt pattern, it has a clearance problem due to the raised runners.
If the intakes were the difference and we have LT1 style heads, why doesn't the LT1 intake fit?
I then set the LT4 intake on an LT1 engine and stock heads. It will not work, but its not because of the bolt pattern, it has a clearance problem due to the raised runners.
06-24-2006, 05:01 PM
#7
Not raised runners taller runners.
You said the pistons are .007 OUT of the hole??? Stock is more like .020+ down have heard a FEW people claim as little as .015 and a few over .030. If the pistons are that far out I would suspect signifigant decking. Also did you have the heads heavily milled to shrink the chamber?
If you had the heads heavily milled and even if Lloyd accounted for that milling the intake the extra block decking would go and misalign everything unless it too was accounted for. Sounds like you have no idea on what decking was done so you could not have told Lloyd about it and he could not have helped you out then.
Can you post a pic of the gasket over the head surface so we can see the misalignment?
You said the pistons are .007 OUT of the hole??? Stock is more like .020+ down have heard a FEW people claim as little as .015 and a few over .030. If the pistons are that far out I would suspect signifigant decking. Also did you have the heads heavily milled to shrink the chamber?
If you had the heads heavily milled and even if Lloyd accounted for that milling the intake the extra block decking would go and misalign everything unless it too was accounted for. Sounds like you have no idea on what decking was done so you could not have told Lloyd about it and he could not have helped you out then.
Can you post a pic of the gasket over the head surface so we can see the misalignment?
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06-24-2006, 05:48 PM
#9
Originally Posted by 96capricemgr
Not raised runners taller runners.
You said the pistons are .007 OUT of the hole??? Stock is more like .020+ down have heard a FEW people claim as little as .015 and a few over .030. If the pistons are that far out I would suspect signifigant decking. Also did you have the heads heavily milled to shrink the chamber?
If you had the heads heavily milled and even if Lloyd accounted for that milling the intake the extra block decking would go and misalign everything unless it too was accounted for. Sounds like you have no idea on what decking was done so you could not have told Lloyd about it and he could not have helped you out then.
Can you post a pic of the gasket over the head surface so we can see the misalignment?
You said the pistons are .007 OUT of the hole??? Stock is more like .020+ down have heard a FEW people claim as little as .015 and a few over .030. If the pistons are that far out I would suspect signifigant decking. Also did you have the heads heavily milled to shrink the chamber?
If you had the heads heavily milled and even if Lloyd accounted for that milling the intake the extra block decking would go and misalign everything unless it too was accounted for. Sounds like you have no idea on what decking was done so you could not have told Lloyd about it and he could not have helped you out then.
Can you post a pic of the gasket over the head surface so we can see the misalignment?
I'll try to post a pic. Milling the intake is exactly what I was thinking.
06-24-2006, 11:30 PM
#10
What I was trying to say was LLoyd could not properly get the intake/head combo milled together to fit properly unless he knew the block specs. If you had asumed it was uncut and he was working off that info there could certainly be the root of the problem, especially since from your other info it sounds as if the block has been heavily cut.
