diff swap, 3:73 to a 4:56
07-26-2022, 12:26 PM
#11
good to know about the manifolds, I went with the BD just because it uses the extra studs. I was between that and the CRP, sounds like I got lucky and picked the right one. they were surprisingly affordable and I am happy with them so far but the lead time was out a ways.
07-26-2022, 01:06 PM
#12
As an FYI, ford released a new manifold design that is constructed of stainless steel and now utilizes and extra stud and slightly altered stud pattern.
These or possibly the BD manifolds seem to be the best option at this point. I personally have warped a CRP manifold after only about a year of use.
These or possibly the BD manifolds seem to be the best option at this point. I personally have warped a CRP manifold after only about a year of use.
also, where do I find BD manifolds? What is the new Ford number?
thank you so much!
07-26-2022, 02:51 PM
#13
the block has 11 bolt holes, the original manifold just used 8 for some reason. new ones thread right in with no modification. you can order direct from the bd diesel website, I got mine through 5 star and they were the same price
07-26-2022, 04:14 PM
#15
Honestly, the CRP's are a great, very stout unit, but I think the OEM design and stud pattern was so fundamentally flawed that even the beefier manifold with higher quality steel was just not enough in extreme conditions.
That's what makes me a little concerned about the BD's. They just throw studs everywhere. The two studs below the rear port are a little concerning to me because its the top of the rear port that leaks since that is where the weight of the turbo and downpipe is transfered into the manifold flange, having that extra stud on the bottom of the rear port may try to "roll" the manifold down.
Here is the BD bolt pattern. They use all 11 studs. The manifold is upside down in this picture compared to the ones in the other picture I sent.
Last edited by mass-hole; 07-26-2022 at 04:59 PM.
07-26-2022, 04:56 PM
#16
looks like I get to be the guinea pig on this one, I didn't consider the clamping forces, I had a very neanderthal approach...."more bolt good" ha, I'll certainly let you guys know if I develop any problems. I have definitely been pressure testing them since they went on, hopefully I don't find any weak links anytime soon cause I need a break from spending money.
07-26-2022, 05:01 PM
#17
looks like I get to be the guinea pig on this one, I didn't consider the clamping forces, I had a very neanderthal approach...."more bolt good" ha, I'll certainly let you guys know if I develop any problems. I have definitely been pressure testing them since they went on, hopefully I don't find any weak links anytime soon cause I need a break from spending money.
07-26-2022, 06:42 PM
#18
Oh yeah $$$$$. Tried to be sensible to some extent but it took a lot. Did the manifolds, crp stage 3s where you reuse the turbine housings, ams adaptors, cvf downpipes, mbrp exhaust......then all the intake side when I was convinced it was the throttle body, the trucks built....it's awesome, my gf also COMPLETELY understands why I needed to do all of this 3 months before our wedding, lol, figure i would go ahead and test it early....I regret nothing
07-26-2022, 07:21 PM
#19
AFAIK CRP has not added any additional studs to their design. They use the original OEM bolt pattern and when we asked on the other forum why they didnt use the additional stud locations they said it was because of the clamping forces and the pattern that the studs get torqued would get screwed up. If you look at the new Ford manifold, they add the extra stud but they also reposition other studs which is, I assume, to alter the clamping forces to account for the new stud.
Honestly, the CRP's are a great, very stout unit, but I think the OEM design and stud pattern was so fundamentally flawed that even the beefier manifold with higher quality steel was just not enough in extreme conditions.
That's what makes me a little concerned about the BD's. They just throw studs everywhere. The two studs below the rear port are a little concerning to me because its the top of the rear port that leaks since that is where the weight of the turbo and downpipe is transfered into the manifold flange, having that extra stud on the bottom of the rear port may try to "roll" the manifold down.
Here is the BD bolt pattern. They use all 11 studs. The manifold is upside down in this picture compared to the ones in the other picture I sent.
Honestly, the CRP's are a great, very stout unit, but I think the OEM design and stud pattern was so fundamentally flawed that even the beefier manifold with higher quality steel was just not enough in extreme conditions.
That's what makes me a little concerned about the BD's. They just throw studs everywhere. The two studs below the rear port are a little concerning to me because its the top of the rear port that leaks since that is where the weight of the turbo and downpipe is transfered into the manifold flange, having that extra stud on the bottom of the rear port may try to "roll" the manifold down.
Here is the BD bolt pattern. They use all 11 studs. The manifold is upside down in this picture compared to the ones in the other picture I sent.
do you have the new OEM number?
Last edited by 1STtimer; 07-26-2022 at 07:24 PM.
07-27-2022, 10:43 AM
#20
I think the addition of the stud on the top by BD is the real winner. Current OEM design has nothing. However the new OEM design does add a top stud as well. With the manifold being stainless, it should bend and spring a little better. Not sure which one to pick now…..
do you have the new OEM number?
do you have the new OEM number?
BL3Z-9430-D- Right
BL3Z-9431-D- Left