Engine/Transmission (1998.5 - 2002) Twins & blow off valve

[V-Metalworx]

I would think if you've got enough fuel to overdrive the HT3B then you need larger twins like S300/400.

This is just my warm up set I don't think I've got enough fuel I'm only running 125s with stock vp and two carter pumps was gonna put a 150 fass on it later but the two carters won't die I've got abought 22psi fuel pressure wot

 

[DCreed]

well, if you really want to be slick, run a second gate to bypass the the primary straight to the DP only when/if YOU want to.

 

[V-Metalworx]

well, if you really want to be slick, run a second gate to bypass the the primary straight to the DP only when/if YOU want to.

I was kinda thinking along that line two I think with this small set I might just run the stock waste gate into the hot pipe and see what happens I would think with the small amount of fuel I have it should'nt build to much boost.

 

[DCreed]

I have a HX40/16w now and will be doing a S400 add-on soon. I'm too cheap to buy the parts so will be making them myself. If you're worried about too much top end boost (and your primary isn't WG'd) then a BOV in the cold pipe maybe your answer. cheap insurance for HG. and can easily be removed if you change your mind.

 

[V-Metalworx]

I have a HX40/16w now and will be doing a S400 add-on soon. I'm too cheap to buy the parts so will be making them myself. If you're worried about too much top end boost (and your primary isn't WG'd) then a BOV in the cold pipe maybe your answer. cheap insurance for HG. and can easily be removed if you change your mind.

I like the way you think I'm to cheap to buy parts two I've made all mine my self thats why I'm building twins I can build them cheaper than buying a good single like an s-300 how do you like HX60/16 as a sigle I always wanted to try one heard they were kinda lagie on bottom,I was kind of thinking abought the external waste gate in the header not so much for this set up but ya know its I'll have to try other combo's like an S-400 I'm just using this because thats what I have right know I'm planning on sending the header to get it ceramic coated thats why I wanted to put in the pipe port for the W. G. so it would be their and I would,nt have to screw up the coating to add one later

 

[DCreed]

I had a quick little s300 top turbo before the HX40w and yes the 16 is laggier than the 12 on the s300 (duh) but not so bad. If I could do a set of twins from scratch I'd use a 62/65/12 AND an external gate to a S400 and be done with it. I think many newer kits are similar. maybe someday they'll figure out the VGT turbos and we'll have it all in one.

 

[V-Metalworx]

Ya I heard the vgt thing I thought abought running a HX40/16 for the top turbo but was scarred it would break the shaft thats the only bad thing abought that turbo it runs the same size shaft with a lot bigger wheel.

how long have you been running that turbo? I've heard different opinions on running a 35 with twins some say they run hot and others say they have ran them with no problems.

 

[DCreed]

I think it has more to do with HOW you run a turbo(s). if you jump on/off the throttle esp. with heavy fuel and timing and/or overspeed the turbo they all break eventually. BOVs and throttle delays help but a properly sized/cared for turbo should last a long time. I think the size of the top/bottom are determined by fuel/rpm range and job. a set of "towing" twins for one guy is too large/small for another guy. as with a single ,smaller housings on the twins spool quicker but will become a restriction after a certain point.

 

[V-Metalworx]

I think it has more to do with HOW you run a turbo(s). if you jump on/off the throttle esp. with heavy fuel and timing and/or overspeed the turbo they all break eventually. BOVs and throttle delays help but a properly sized/cared for turbo should last a long time. I think the size of the top/bottom are determined by fuel/rpm range and job. a set of "towing" twins for one guy is too large/small for another guy. as with a single ,smaller housings on the twins spool quicker but will become a restriction after a certain point.

I'll say I have to agree with you I guess we'll find out before to long thanks for all your help.

 

[DCreed]

keep us updated and as always, pics,pics,pics!!!

 

[V-Metalworx]

keep us updated and as always, pics,pics,pics!!!

I will it's gonna take me sometime to build the header I've built an equal length 24V header for a single turbo but their are way to many tubes to run this with a twin setup I'll post a picture keep in mind this is the first proto type but it did pick up 20 horse on the dyno I would like to se if I can run the small tubo flange stait with the head flange to keep the top turbo down a little lower. Oo.

 

[V-Metalworx]

keep us updated and as always, pics,pics,pics!!!

Well I found one pic of that header this was when it wasn't quite right don't have any more pic's of it if you like pic's did you see the ones I put on hear of my engine and 6spd transmission I think they are on pg 3or 4 by now thread is called shop time in the winter didn't really get the responce I thought I would but I figured you'd like them sence you like to build your own stuff like me. :-laf

 

[DCreed]

I did read that thread but thought those were fast coolers. I have a few on "cummins chrome kit", its in the products and accessories forum.

 

[V-Metalworx]

I did read that thread but thought those were fast coolers. I have a few on "cummins chrome kit".

no they are just covers we made at work from 3/4" alum the factory ones were to rusty my thought was to make these covers and use them with fast coolers but still havn't bought them yet maybe next winter.

 

[V-Metalworx]

I did read that thread but thought those were fast coolers. I have a few on "cummins chrome kit", its in the products and accessories forum.

Hey checked out your pics great job looks good I need to take more of mine just a bought got the HTB compresser housing polished?love shiney parts