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1-19-07, 23:31
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#1 (permalink) |
 
 
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Freds new he351cw turbo, 44mm chinese vband tial knock off wastegate and S14 K BPV.
Yesterday I was lucky enough to receive my holset safely and VERY well packed in from the US of A. Its in near new condition having done under 1000miles of service in its former dodge. The lack of use shows too, people ask if its new or 2nd hand. its not obvious. especially now that i've cleaned off the small amount of soot in the hot side.
plans for this are ($ dependent) : ceramic coat the exhaust housing weld closed the wastegate hole (22mm hole is too small) figure out if i can use the built in solenoid for boost control with an external wastegate, and remove it if not. clock both housings such that the drain is on the bottom in service Today after finding out how small the wastegate is inside it, i wandered down the road, and bought myself a nice waaaaa leeeeeeeeeeee chinese super duper tial rip off 44mm vband wastegate. this thing is slightly rough from its chinese nature, but nothing the dremel and precision angle grinder and arm could not fix. the diaphram is a nice silicone one with fibre reinforcing. the ally looks nice n shiny on the outside, but is just die cast in reality, and as such, has some air pockets in it that you can find when you look around. the cast iron exhaust section of it was machined slightly off centre from the molding line, so i ported it down to match the vband adapter. i also smoothed down the casting seams on the outside, and the step around the valve head such that it looks the part when coated ( if i can afford it) and flows nicely when it needs to :-) it comes with a spring of unknown tension, so i applied 3.9kg to it, and it went from 104 free length to 99 with that load applied, it is one BIG spring. in the housing it is compressed down to 41.3 + 16.8 - 8.7 mm = 49.4mm from 104 with our 1.282 kg per mm spring rate gives ( 104 - 49.4 ) * 1.282 70kg (no wonder i had issues even with longer bolts getting it apart nicely) the exposed diameter of the head of the valve is 39.5mm 39.5 / 2 = 19.75 / 25.4 = 0.77756 inches squared and times PI is = 1.9 square inches another 21.5 mm of spring needs to be compressed with 27.56kg of pressure the effective diaphram is about 73.6mm in diameter 73.6/2/25.4 = squared times PI = 6.6 square inches now, if we combine the two areas it gives 8.5 square inches with 70kg * 2.2 for pounds = 154 / 8.5 = 18.2 psi hmmm, i guess thats a rough calc, but it seems high. using electronic boost control, that can be made higher, but not lower. of course, i'm assuming that the exhaust pressure = the intake pressure, perhaps sick could comment on these calcs etc... fred. Last edited by fredio54 : 1-20-07 at 2:05. Reason: finish calcs |
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1-20-07, 1:40
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#3 (permalink) |
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i will i will, give me time :-)
http://www.turbododge.com/forums/sho...d.php?t=127389 in the mean time, thats the turbo, and this is the wastegate http://www.drivenperformance.co.nz/s...?idproduct=767 it doesnt look quite as nice, but its close... if you want more pics, just say the word :-) Last edited by fredio54 : 1-20-07 at 1:47. Reason: links |
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1-20-07, 5:54
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#5 (permalink) |
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sorry all, forgot the bpv, here it is, on the small side, but two should be ok.
http://i50.photobucket.com/albums/f3...o54/silvia.jpg http://i50.photobucket.com/albums/f3...4/silvia-1.jpg fred. |
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1-20-07, 8:58
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#6 (permalink) | |
 
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nice but you need some kind of adjustable bov/bpv,remember s14 comes with a t25/28 turbo, I dont think that will do the trick or even come close to holding the pressure from that turbo. .  Last edited by ademan : 1-20-07 at 9:01. |
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DIY PAGE=http://www.cardomain.com/ride/2423853/1
1992pgt.. http://www.cardomain.com/id/ademan 1991pgt..http://img525.imageshack.us/my.php?i...wcar002jn7.jpg |
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1-20-07, 14:15
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#8 (permalink) |
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the S14 valve like the dsm one, holds 15psi, no problem, reports of more... etc i'll use two for flow, or a cheapie recirc, if i can find one. i'm definitely aware of the volume of air that will be coming out of that thing at full tilt. i dont want it slowing down if i can help it at all. trust me, i'm "on the case"
according to my caclulations, it will have more torque than the stock sohc 2l everywhere, after that, i dont care. positive pressure by 2k, full 15psi by around 4, or if i'm unlucky 5. it will have about 2m of straight through muffler and straight 3" pipe after it, so back pressure will be negligible at lower rpms to aid spooling, and should flow enough for 400 hp or so. it really needs 3.5" or 4" esp if the ex were to be longer. but its not getting it! a 3" is going to piss me off noise wise enough... the ute engine bay is fairly roomy, and as you can see in other places, i can weld. so fitment isnt an issue, i've been wanting to share this with you lot, heres a good spot : http://www.globalnetspace.com/miata.html if he can fit that much hp in a miata bay, i can fit double that in the ute ;-) after staring at it in pics for weeks and weeks, i actually thought it looked small when it arrived. i know its not but... my driving style keeps rpms above 4k always (mostly above 5), so it should appear linear to me :-) we'll see, i can always slap it on an RB30DE and use an evo td05 on the fe3... the beauty of this turbo is that its most efficient between 15 and 25 psi. so even on a stock 9:1 (what i'm hunting for today) it'll be good at the lower end. and on a forgied 8:1 it'll be good at the top end. i've seen threads of people with them on 1.6 hondas, running 8psi, and it works for them. so i'm not worried. also rebel and countless 2l dsms, and more 2.0 and 2.2 hondas have them on and are more than happy. my biggest worry by far is traction, and i'm doing things about that. battery and fuel system is going on a frame behind the rear axle, and i wont be shy with the steel used to hold the tail lights, deflect jap cars, and hold the number plate. one day, i may chuck some fibreglass at the front, and about then, it will be reasonably even. i need to sort out the clutch and shifter this week so that i can pull the sohc and little box out, and put the big box and a dohc in and start on the manifolds. by certifiable, you mean mad? well, yes, anyone thats been in my car could have told you that ;-) fred. |
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1-21-07, 5:21
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#9 (permalink) |
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had an issue with the wastegate...
wastegate thread : http://www.mx6.com/forums/showthread.php?t=179342 (waaaaaaaaa lee chinese wastegate troubles what to watch out for) all sorted :-) fred. |
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1-21-07, 14:33
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#10 (permalink) |
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[quote=fredio54;1700075]the S14 valve like the dsm one, holds 15psi, no problem, reports of more... etc/quote]
no they wont, I have 2 of those thing in my basement,came off my 300zxTT, but anyway they are not like dsm and also with the dsm bypass wont hold that kinda boost on that turbo, 15psi on a 14b is different from 15psi and a holset. youve gone the far,just invest on a really proven bypass valve not factory crack.and the 300zx and most s14 comes with t28 and t25/22 turbo. Last edited by ademan : 1-21-07 at 16:57. |
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DIY PAGE=http://www.cardomain.com/ride/2423853/1
1992pgt.. http://www.cardomain.com/id/ademan 1991pgt..http://img525.imageshack.us/my.php?i...wcar002jn7.jpg |
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1-21-07, 16:16
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#13 (permalink) | |
 
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You're still sold on that 44mm wastegate? 44mm is 1.7" which will support close to 450 CFM upon opening. Thats a large escape plan for exhaust gas. Granted with a turbo that large, you may need it, but there's also a chance that a wastegate that large may also slow down the turbine significantly as well.
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Quote:
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1-21-07, 18:13
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#14 (permalink) |
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yeah, it will just reach equilibrium at a certain opening, i strongly doubt that there would ever be enough force to push it to the stop. besides, ms will be controlling that gate, it will be closed completely till there is X boost. then open whatever i want it to. the size really just gives max flow, like a head with the valves at different lifts, it doesnt flow much closed. the exhaust housing is pretty small too, so there will be too much exhaust gas for it. if it were an hx35, it wouldnt require as much of one. having said taht my mate has a chinese 50mm one hes using with the hx35. i dont believe it will be a problem, but we will see... :-)
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1-22-07, 13:42
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#15 (permalink) |
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right, so to go with the wastegate, i need a !hole, heres part one, i'm just waiting for some 22mm bar stock to do part 2...
http://i50.photobucket.com/albums/f3...54/he351-2.jpg http://i50.photobucket.com/albums/f3...54/he351-3.jpg fred. |
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