shiftycapone
wandering the desert
- Joined
- Oct 26, 2007
- Messages
- 2,034
So I built a log style manifold awhile back from some 1 1/2" sch. 40 pipe, with a wastegate adapter right behind the divider. T4 flange, divided, ported to match. The build of it is in the custom fab section. Now the problems....
Exhaust leaks? NO.
Low boost? YES.
So originally the truck had twins with this manifold (hx52 over ht4c, 67mm over 84) and a 50mm synapse gate into the hotpipe. Spooled alright, and still pulled well on the top, but power felt lower when compared to the older 62/4c setup with untouched mach 6's, as opposed to these bad boys from Weston. So I tightened the gate up as much as possible. Same results, about 50-55psi overall with about 35+ from the primary, WTF? Fast forward..
The mount for the primary, which is also the oil drain, begins leaking. No big deal, I remove the 4c and decide to run the 52 as a single, to see if I can track down the problem. Turbo makes about 35 at wot. Once again WTF? With less fuel I was driving a 471 to around 60psi. I get my hands on a much stiffer preload spring from synapse and throw that bad boy in there, hoping for results. No dice. Turbo makes 40psi at wot. Decide to block off wastegate and go balls out. Once again, 40psi.
I have tried everything. Change timing, dv's, wastegate ( 50mm down to the 39mm seat), no wastegate, tubo blanket, plate adjustment. Same thing always, not the boost it should make. I begin to question if the manifold is just flowing too much. But how? Many people have ran Bodies manifolds, or made their own with good results. I call Weston looking for a little help, and he settles upon the same conclusion. The only thing I have not tried is another manifold. So I put on a pdi t4 that I had around, and am waiting on a spacer to finish the install. We shall see how it goes.
If you have some insight or an opinion, let it out. I'm curious if I'm the only person who has had this problem. And as for fuel, which I do not see is the problem, the truck has the following: Dragonfly pump, #6 or no plate, Westons big 131's ( also tried 181's), 7x13's with .015 off the pintle and .015 of extra stroke, 4k's, and a raptor 150 feeding 50psi. Afc is tuned.
Exhaust leaks? NO.
Low boost? YES.
So originally the truck had twins with this manifold (hx52 over ht4c, 67mm over 84) and a 50mm synapse gate into the hotpipe. Spooled alright, and still pulled well on the top, but power felt lower when compared to the older 62/4c setup with untouched mach 6's, as opposed to these bad boys from Weston. So I tightened the gate up as much as possible. Same results, about 50-55psi overall with about 35+ from the primary, WTF? Fast forward..
The mount for the primary, which is also the oil drain, begins leaking. No big deal, I remove the 4c and decide to run the 52 as a single, to see if I can track down the problem. Turbo makes about 35 at wot. Once again WTF? With less fuel I was driving a 471 to around 60psi. I get my hands on a much stiffer preload spring from synapse and throw that bad boy in there, hoping for results. No dice. Turbo makes 40psi at wot. Decide to block off wastegate and go balls out. Once again, 40psi.
I have tried everything. Change timing, dv's, wastegate ( 50mm down to the 39mm seat), no wastegate, tubo blanket, plate adjustment. Same thing always, not the boost it should make. I begin to question if the manifold is just flowing too much. But how? Many people have ran Bodies manifolds, or made their own with good results. I call Weston looking for a little help, and he settles upon the same conclusion. The only thing I have not tried is another manifold. So I put on a pdi t4 that I had around, and am waiting on a spacer to finish the install. We shall see how it goes.
If you have some insight or an opinion, let it out. I'm curious if I'm the only person who has had this problem. And as for fuel, which I do not see is the problem, the truck has the following: Dragonfly pump, #6 or no plate, Westons big 131's ( also tried 181's), 7x13's with .015 off the pintle and .015 of extra stroke, 4k's, and a raptor 150 feeding 50psi. Afc is tuned.