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Discussion Starter · #1 ·
i remember when i got my truck a bit more than a year ago and i was saying "it has enough power" and "its good enough i dont want it to be a money pit"...... after a lil wrenchin the gearhead came out in me.

over the past year i have been through just about everything on the truck, and the constant thinking about what to upgrade next.(wyoming farm truck so shes been worked) and that leads to this build... i put my truck away this winter. (wisconsin's salty roads and cold temps arent nice to the old girl, or start ups and cold shut downs to move it outta the way) before i put it away i was noticing that the headgasket weeped alil bit and hazing a lil bit. but it wasnt terrible YET so that was my first objective for spring before, headgasket and midaswell stud and oring it for future upgrades while im in it... and then i decided it was time to go to a better turbo (current h1c with 16cm and new internals) and i started looking into all that....

i starting looking for turbos and it seemed to get anything worth buying for what i want i would be spending close to 1000 for a nice aftermarket, but i got convinced by the he351 by how everyone here likes it that has upgraded it to... well if i was planning on maybe spending 1000+, and the he351 i found was pretty resonable, i midas well keep spending, i always wanted to do a twin turbo setup from seeing how other people loved it and the performance they got, and how cool itd be (sounds too, hehe) to have that set up, well shortly after i found a ht60 (27cm) that was rebuild and being sold on here by swalldog. (thanks!) :party018: soooooooo why not just jump into doing twin turbos while i got time to fabricate.

i love fabricating, customizing and problem solving how to make stuff work. and man does this project have alot of fabrication. but to keep cost wayyyy down thats what has to be done, otherwise youll spend a good chunk of money just on all the lil things you dont think about. i figured i hadda start a build thread while most of this stuff i did is still in my head, and still a lot to do before i have the set up done.


so before i type more of a novel ill post some pictures and get this thread started










:stirpot: thats all ya get for now, later on ill get write something up and post some pictures of the fabrication ive done so far and parts of collected and some good sites to get stuff for reasonable.

:beer:
 

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Discussion Starter · #3 · (Edited)
a while ago i came across this cobra head turbo back for a good price and for some reason i knew id use it at one point.(in pictures in first post) 2 problems with it though. the t6 flange i bought that mounts up to the ht60 is 4inches exactly inside diameter, and the corbra head is ment for a 4inch pipe to slide over it. so with it centered over the flange there was about 1/8th around the whole thing.

so to get it to fit over the flange good and flow smoothly into it, i decided to cut 1in sections all the way around it.. another problem is its a 1/4 inch thick, and cast. so it didnt wanna bend to easy. some of them i got to bend some broke and i just welded them at the angle i needed. then filed all the gaps and welded in insides and out all around. i did heat it up but the big torches werent accessible to really heat it up.

so after about a hour or so and some beers i had it all welded up and grinded down flow nicely. :party018:









 

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Discussion Starter · #5 ·
Where did you find the cobra hot pipe? Part number?

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i just typed in cobra head turbo back or something like that in on ebay a long time ago and it came up. dont know if its an actually "cummins" back but its just as good. i just typed in "cobra head cummins" on ebay and theres one for sale
 

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Discussion Starter · #6 ·
on to step number 2 of 3 on the cobra head back.

when i was looking for brackets to mount to ht60 to the cobra head i came across this nice bracket on ebay, bout 40 bucks but was milled and ported nicely to flow the exhaust into the ht60 better. but once i got it i noticed how off it really was. it had about a 1/4 inch all the way around the ports so that made it not flow to nicely... haha.



with the ht60 weighting almost as much as a prius, i knew i hadda brace it up somehow so it wouldnt rip my he351 and manifold off. i was planning on just making some sort of bracket off of the flange or a bracket in between the ht60 and the flange and bolted to the manifold bolts and some other place not yet determined. well now that there was such a gap in flow between the cobra head and the turbo i decided i was gunna cut some 1/4 steel and make some spacer brackets that i could also use for bracing up the ht60.

i probably spent a good 4-5 hours making these 2 brackets, but id rather spend my time than my money if i can just make it. so first i traced out the foot of the ht60 and roughly cut them out. i traced the ports and figured what drill i could get most material out with. so i drilled in each port 6 times and figured the rest id be able to just dremal bit the rest out. BUT that woulda took forever. so i got out our sawzall and did a lot of lil cutting and getting lil pieces out of the ports to cut down the amount of grinding. i didnt think it would work to good but it worked great. and the rest i used the dremal. i formed them all to the size of the turbo ports, then i lined up the original flange and my 2 flanged on the turbo so they lined up best. bolted it down and tacked the brackets together. once i did that i just went with the dremal and ported it out perfect. (still some cleaning up to do and smoothing) now the exhaust will flow perfect into the turbo outta the cobra head.





sawzall vs. dremal








another lil project was i read alot of people bore out the wastegate on the he351 so it flows better. so i opened her up and bored her out so there was bout 1/8 inch around the flap.



 

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Looks great keep up the work
 

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looks great, interested to know more about the truck its going in?
 

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Ducati M.
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From this I've gained some inspiration for what I'll be doing on my compound setups. Keep up the good work, and detailed writing up of what you're doing
 

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Discussion Starter · #12 ·
thanks guys! :party018:


westjohn,

its the truck in my sig. its been a project since i got it. but a fun one. it didnt have ANY leaks when i bought it. its just been a farm truck all its life. most of witch was in wyoming but i got it from a guy in upper michigan. by the time i got 250 miles into the trip it there was a couple minor leaks. expected... but when i got home, just bout EVERYTHING was leaking a bit. and 4 of the 8 bolts that holds the transfer case adapter plate on the back on the getrag were BROKE! i pulled it all out and put a new clutch in and checked everything out.. changed all the gaskets from there back and reshimmed the trans. then last summer i took her on a longer then usual freeway drive and it for some reason it puked oil outta the front of the oil pan, no idea why. did the oil pan gasket and found half of a piston cooling nozzle and half the trust bearing!!!! luckily our pistons are so wide that when the crank would shift that 1/4in the rods would just slide along with it on the piston. so i pulled that engine out and everything apart. besides taking the head off and pistons out cause i didnt have enough time or money to get into it that far... cause then you midaswell bore it and get new pistons and so on... i could write a novel on all the things ive done on it but thats the basics.

what do you mean jibayes? the gasket between the manifold and turbo?

heres a couple shots of the truck i can round up now. ill make a update soon on some lil fabrication stuff i got done and parts for the set up.







i made this gauge holder outta some oak and stained it with early american. looks good and looks good where it is. im either gunna make one with 3 more spots below it or do a pillar mount or something to hold a couple more. i want a fuel pressure gauge, boost just from the ht60 and back pressure cause i plan on running an exhaust brake.

 
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Discussion Starter · #14 ·
yes the inlet/mounting flange.
oh yeah. i already made one of the divided turbo gaskets fit nice. plan on doing some porting on the head and manifold and check out the manifold to turbo.
 

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Discussion Starter · #15 ·
its been crazy busy around here lately but i was able to get some stuff started and one step finished.

on the he351 theres the port on the compressor that the electric dohicky goes from the wastegate. well instead of having to buy the plug that they make to block it, i had my buddy that works at a shop mill it down low and he welded it shut for me. turned out pretty good.










im pretty close to having the work on the cobrahead all done. just gotta weld the bracket onto the bottom and weld my new flange for the he351 on it.
 

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Discussion Starter · #16 ·
ahhh finally found some time and energy to get a couple things done and some parts gathered up. the snow/weather has been relentless around here so ive been busy making money! but im ready for spring..

we'll start with the t6 bracket for the ht60. so i got it nicely ported to size and smoothed so it flows good from the hotpipe through the flanges and into the turbo. welded the seams between the 2, 1/4in plates and the actually flange and laid some good bead to keep it all together. i just am going to have to cut some washers in half so the bolts that go through will have even pressure, as you can see the weld is pretty close to the holes and the bolt collars sit on them.


(he351 flange isnt on there yet)


next was the flange that will mount to the back end of the he351. witch is a 4.4 im pretty positive.. the flange that came on the cobra head was a 4in. i planned on cutting it off and welding on a new flange. but instead of buying one i just made my own. i cut the 4 in flange off the cobra head as clean as i could. cut it in 1/4th and layed it on the he351 to get the size id need it to be. the angle of the pieces was a lil off but nothing that would matter. so then i needed a way to keep them from moving. and i was going to just fill the space with weld. i found these steel rods in the garage and bent them up so it would hold them just right. worked pretty well! then i was able to fill the spaces. i couldnt figure out how i was going to get the surfaces flat on the flange and the cobra head, then the light bulb lite up again. and i had a grinding disk that fit over it perfect so i just held even pressure and it is as flat as can be now! the inside diameter of the flange was a bit bigger then i wanted also an i had a disk that was the diameter i wanted it inside so i just let it grind through and it was perfect! i got a bit of work the do on this part still i just welded it on last night but it turned out really good.









ill get better pitures of the flange when its done.



i got one of my oil drain fittings done. i just made the bracket outta some 1/4 steel and the some 1in piping.



i got a huge assortment of t bolt clamps and all of the v band clamps off this site called A-Z factory supply. i highly recommend it. all of the t bolt clamps i got were around 3 bucks each and the vband clamps were around 12!! i got the 5.88 clamp for the ht60, works great and it was only 8 bucks. i seen clamps for that turbo being sold for 30+.



 

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Discussion Starter · #17 ·
well i was out in the garage drinking some beers with my buddy and decided we hadda see how its gunna look!







:party018::stirpot: cant wait to hear them spoolin.

i plan on getting the cobra head and he351 housings painted in some high temp black paint to match the ht60 exhaust housing. and i think ill get both of the compressor housings polished.
 

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I like a project that don't come out of a box with directions


Sent from AutoGuide.com Free App 82 Chevy ve pump h1c turbo 62mm compressor 12cm turbine housing 4" cooler tubes 4" exhaust egt boost-gages 3200 spring pump tuned up
 

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thanks guys! :party018:


westjohn,

its the truck in my sig. its been a project since i got it. but a fun one. it didnt have ANY leaks when i bought it. its just been a farm truck all its life. most of witch was in wyoming but i got it from a guy in upper michigan. by the time i got 250 miles into the trip it there was a couple minor leaks. expected... but when i got home, just bout EVERYTHING was leaking a bit. and 4 of the 8 bolts that holds the transfer case adapter plate on the back on the getrag were BROKE! i pulled it all out and put a new clutch in and checked everything out.. changed all the gaskets from there back and reshimmed the trans. then last summer i took her on a longer then usual freeway drive and it for some reason it puked oil outta the front of the oil pan, no idea why. did the oil pan gasket and found half of a piston cooling nozzle and half the trust bearing!!!! luckily our pistons are so wide that when the crank would shift that 1/4in the rods would just slide along with it on the piston. so i pulled that engine out and everything apart. besides taking the head off and pistons out cause i didnt have enough time or money to get into it that far... cause then you midaswell bore it and get new pistons and so on... i could write a novel on all the things ive done on it but thats the basics.

what do you mean jibayes? the gasket between the manifold and turbo?

heres a couple shots of the truck i can round up now. ill make a update soon on some lil fabrication stuff i got done and parts for the set up.







i made this gauge holder outta some oak and stained it with early american. looks good and looks good where it is. im either gunna make one with 3 more spots below it or do a pillar mount or something to hold a couple more. i want a fuel pressure gauge, boost just from the ht60 and back pressure cause i plan on running an exhaust brake.

I think that paint job is by far the coolest color combo I've seen on a first gen... I like it A lot. Reminds me of old factory '67-'72 two tone C-10's... If you can accept that as a compliment :doh:
 

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Discussion Starter · #20 ·
I think that paint job is by far the coolest color combo I've seen on a first gen... I like it A lot. Reminds me of old factory '67-'72 two tone C-10's... If you can accept that as a compliment :doh:
haha thanks! yeah i like it also. looks good, specially all cleaned up. i guess it was originally tan and the guy i bought it from put the bed on it and painted it these colors, he was a chevy guy so thats where that scheme came from im guessing!
 
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