Turbo interchange SD-->OBS
I did come across this very nice thread:
https://www.ford-trucks.com/forums/7...arly-99-a.html
Looks like it's pretty much the same idea that I have, but on a e99, right?
Is the driver's side exhaust manifold different from a 97 to an e99? Robin does not mention it. He is also using a Turbonetics turbo. I know I can buy newer turbos (and I will at some point), but in the interest of keeping costs down, I am still interested in this SD van turbo/pedestal (under $200). Am I better off passing on the van turbo and buying something else?
On the RiffRaff site is a Van Turbo outlet adapter. I would presume this would allow the SD van turbo to work on the 3" downpipe that I have?
I am presuming that keeping my current turbo would not work (especially if I am changing up-pipes). Unless there is an adapter to go from the OBS turbo to the newer SD intake. I do not think this is likely, but if so, that would at least get me partway there with a functioning I/C system and larger ports to the motor.
I keep reading and learning. Thanks to you guys for the answers! Clay, I will likely be calling you in the next day or two. I really would like to get all the parts lined up and try and knock it out in a coupla weekends.
DS
I did come across this very nice thread:
https://www.ford-trucks.com/forums/7...arly-99-a.html
Looks like it's pretty much the same idea that I have, but on a e99, right? Yes, same idea but a little different in that the e99 already has the intercooler and I'm pretty sure it has the newer driver's side exhaust manifold. I've never heard of the e99 guys swapping that out.
Is the driver's side exhaust manifold different from a 97 to an e99? Robin does not mention it. He is also using a Turbonetics turbo. I know I can buy newer turbos (and I will at some point), but in the interest of keeping costs down, I am still interested in this SD van turbo/pedestal (under $200). Am I better off passing on the van turbo and buying something else? I'm a big fan of the van turbo. Better drive pressures that the stock SD truck turbo because of the larger exhaust housing which reduces egts. Some will say it's a little laggier on the low end but I've didn't notice any on my SD. Plus you don't have the surge that the SD truck turbos have. Also, no wastegate to contend with. It's a great turbo for a budget that you can easily run larger injectors with down the road.
On the RiffRaff site is a Van Turbo outlet adapter. I would presume this would allow the SD van turbo to work on the 3" downpipe that I have? No you will not need the adapter that RiffRaff sells. That is made so you can use the van turbo in a SD truck because the SD truck has a larger DP mounting flange. The Van turbo has the same dp mounting flange as the OBS trucks. So you would just use the factory one that comes on your van turbo. Or if it doesn't come with one, I believe you can use the one off of your OBS turbo.
I am presuming that keeping my current turbo would not work (especially if I am changing up-pipes). Unless there is an adapter to go from the OBS turbo to the newer SD intake. I do not think this is likely, but if so, that would at least get me partway there with a functioning I/C system and larger ports to the motor. No, it's all or nothing from what I understand.
I keep reading and learning. Thanks to you guys for the answers! Clay, I will likely be calling you in the next day or two. I really would like to get all the parts lined up and try and knock it out in a coupla weekends.
DS
I ran a van turbo in my SD truck and loved it. With stock injectors and stage 2's it performed great. Made it much funner to drive in the upper end of the power curve wereas the stock turbo choked out because the drive pressures and egt's got too much.
I liked the combo for the price so much that I'm converting 2 OBS trucks over to the SD setup and running SD van turbos on both. Each with have stage 2 injectors. I had enough parts left over from my SD, that I didn't need much to convert the one truck. The other I just bought all used parts and don't have much into the conversion and trubo at all.
I still have a coupla questions:
Think it'll bolt right up to my OBS? Will the height be okay? Should I rebuild this turbo while it's out? Mod it?
Do I need to change out the driver's side exhaust manifold? If so, why?
When I get the new up-pipes is it important that they be ceramic coated? So far, I am thinking yes.
I have the turbo and the 3" spyder intake and the rest of the laundry list (so far) is:
3" plenums with reinforcements
Intercooler - 6.0 or 7.3?
I/C pipes for either - where to get? GTS?
boots for either
bellows style up-pipes with y-pipe
outlet adapter for van turbo
clamp for turbo, new o-rings
money and time to install -

DS
I still have a coupla questions:
Think it'll bolt right up to my OBS? Will the height be okay? Should I rebuild this turbo while it's out? Mod it?
Did your van turbo come with a pedestal? If not, you'll need one from the SD. You can't use the newer style turbo with the OBS pedestal. It'll bolt right up to the block exactly where you're original pedestal bolts too. But you'll need new ped bolts cause the SD requires longer ones. You'll also have to do a little "reshaping" of the firewall behind the turbo otherwise, it'll hit. It doesn't take much, but a little. It's not a bad idea to rebuild it while you can. I would unless you know it's solid and doesn't have alot of miles on it. If it didn't come with the EBPV (downpipe adapter flange) use the one from your original turbo. They're the same and that way you can use your OBS 3" downpipe.
Do I need to change out the driver's side exhaust manifold? If so, why?
It's recommended and if you've got access to one, I would. The end of the manifold (where the up-pipe hooks to it) is a little longer on the SD than the OBS. By changing it out, it'll align everything like it should be.
When I get the new up-pipes is it important that they be ceramic coated? So far, I am thinking yes.
Go with IH bellowed up-pipes. Some will say yes to the ceramic coating, but I personally wouldn't. For the cost, you won't see any gains in performance. I'd use that money elsewhere. If you want them to look pretty all the time, then do it cause that's the only benefit I can see until you get to really high hp levels.
I have the turbo and the 3" spyder intake and the rest of the laundry list (so far) is:
3" plenums with reinforcements - reinforcements are excellent and cheap insurance
Intercooler - 6.0 or 7.3? - depending on what you can get ahold of, both will be better than without
I/C pipes for either - where to get? GTS? - some build there own, modify SD pipes, or if you've got access to GTS style pipes, get some of those
boots for either
bellows style up-pipes with y-pipe
outlet adapter for van turbo - no need if your van turbo came with it, or just use your stock OBS (they're the same)
clamp for turbo, new o-rings
money and time to install -

DS









