Anyone running the Hooker Turbo LS cast manifolds run into this issue??
01-31-2019, 04:45 PM
#1
Anyone running the Hooker Turbo LS cast manifolds run into this issue?? 
Huge opening
I have a 67 Chevelle. I swapped in a 5.3 and I’m running a gt45 turbo. I decided to run the hooker turbo ls manifolds (which are great for tight spaces) and their crossover tube. Engine is tuned. Made 600rwhp through a th400 and Moser 9” on 14lbs.
After putting about 1400 miles on this setup, the flex joint in the cross over tube developed a nickel sized hole in it. Holley warrantied it. Installed the new one and now I have about 2000 miles on the setup (about 600 miles on the replacement crossover tube) and it looks like this. Holley again is warrantying it but I don’t want to keep doing this every 1000 miles or so.
Anyone running their manifolds/crossover tube run into this?
01-31-2019, 07:38 PM
#3
02-01-2019, 09:51 AM
#7
9 Second Club
A support brace either side of the flex, or across it might help.
No doubt as Holley, it is cheap Chinese stuff, but say if you had a lot of pressure and heat in there, it could just be trying to blow itself apart and the flexi section just cant handle it. So a strain relieve might help.
No doubt as Holley, it is cheap Chinese stuff, but say if you had a lot of pressure and heat in there, it could just be trying to blow itself apart and the flexi section just cant handle it. So a strain relieve might help.
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02-01-2019, 03:36 PM
#8
I was thinking about just getting the Vibrant turbo flex bellow. Like 30ish bucks but beats the hell out of changing this crossover pipe more frequently than the engine oil lol
02-01-2019, 06:30 PM
#10
all stainless besides 321 has a limited number of heat cycles, and even 321 will fail if there is any loading.
the naked bellows stuff I use post wastegate where there is never a huge pressure differential
the interlocking inner, braided external stuff works good if you buy mild steel and dont wrap it. vibrant says it's fine, spd says it's not...up to you really
the best solution I have found is a double slip fit weld on. it allows expansion and rotation and some axial loading.
also good is the spd slip joint inner that has a naked bellow outer.
the naked bellows stuff I use post wastegate where there is never a huge pressure differential
the interlocking inner, braided external stuff works good if you buy mild steel and dont wrap it. vibrant says it's fine, spd says it's not...up to you really
the best solution I have found is a double slip fit weld on. it allows expansion and rotation and some axial loading.
also good is the spd slip joint inner that has a naked bellow outer.
02-01-2019, 08:00 PM
#13
02-02-2019, 11:03 AM
#16
9 Second Club
02-02-2019, 03:22 PM
#17
As stated I'd run the double slip. They really only allow movement down the axis but are robust as you have 3 walls
A 321 double slip from stainless headers is 50 bucka
I have 3 in use here and all 321
A 321 double slip from stainless headers is 50 bucka
I have 3 in use here and all 321
02-02-2019, 08:07 PM
#18
Launching!
I can see each bellow.... one near each manifold flange and one middle.... why is the one is the middle welded completely? And I’m guessing the ones on each side near the manifold are able to be taken apart? Just not familiar with these flanges
02-03-2019, 06:27 AM
#20
