No front or rear ends and it wheelies already !!!!
It's the little details like this ^^^^ that make this thing so damn cool.
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No front or rear ends and it wheelies already !!!!
It's the little details like this ^^^^ that make this thing so damn cool.
thanks Dan! yup its gunna start upright into the sky
Wow man, this is radical! Nice work Surt.
thanks heaps man! nothins to radical for a russian anarchist haha
pipe works pretty much over, made the connecting pipe from a 90 degree elbow, fitting has taken awhile but the results worth that - no gap between the pipe ends
http://i1175.photobucket.com/albums/...r/DSCF4813.jpg
http://i1175.photobucket.com/albums/...DSCF4814-1.jpg
just to weld a bov and air temp sensor bungs
http://i1175.photobucket.com/albums/...r/DSCF4817.jpg
had to cut off and to relocate the breather bung
http://i1175.photobucket.com/albums/...r/DSCF4815.jpg
the zaust pipes flange holes were finally milled, the rest of it is my part - 83 holes must be drilled lol
plus 7 holes for the turbine and wg mounting
http://i1175.photobucket.com/albums/...r/DSCF4816.jpg
looking great Surt.;)
Where did you get the BOV from? I had exactly the same looking one because it was compact and cheap off of that sight that shall not be named, and just could not get the damn piston to seal, and if it did seal it was too tight to opperate. I had a 2 piston o-rings fail which leads to a vacuum/boost leak and fucks up all the fueling.
But, i have had good luck with the cheap Greddy diaphram type BOV's. Alot easier to work with and more reliable in opperation. But are a bit bigger to mount.
Keep them piccy's coming though, always luv your updates :D
thanks for the feedback and info on the bloody bov slingy i'll disassemble mine to see its inners. i guess ur 2nd take was smth lke that 1?
http://www.ebay.com/itm/380496131379...84.m1423.l2649
i have a similar 1 as well for my other project, just sad to hear that i wasted coin on 2 piston type bovs, i liked them bein just compact. and i bought them from evil bay, no need to be shy on here lol
wat ever it took just 90 min to drill around the flange
http://i1175.photobucket.com/albums/...r/DSCF4818.jpg
http://i1175.photobucket.com/albums/...r/DSCF4821.jpg
See if you can make em work first, but i spent way too long messing with them.Quote:
Originally Posted by Surt
2 little checks you can straight up with just lung power.
First, suck and blow into the nipple (ooh er missus) in the top, if you can endlessly suck air through it (as mine did) then the piston isnt sealing which will not only cause a manifold leak but means the piston will fail to rise.
Then, turn around and try sucking and blowing through the large hole, again, they probably wont seal, but this is easier to fix with a fatter section O-ring, and its something i've done with all my el cheapo BOV's
If you want small, light and robust, you cant beat the Bosch one as used OEM on saab's, renaults etc. Its a very good unit and can be scored cheap from the wreckers or ebay.
yup ive tested it today like you said slingy everything seemed alrighty, there was vacuum when suckin and no noticable leaking when blowin. it also came with a spare stiffer spring, smth like 15psi rated and the one inside is set for 7psi
Cool, maybe they've changed the design abit then, i had mine like 2 yrs ago so could of changed it.Quote:
Originally Posted by Surt
Just remember as well, that the spring only has to be strong enough to create a good seal when static. This may be only say 5psi of spring pressure, but it will still work with 15psi of boost.
This is because the 15psi of boost will be trying to push the bov open, but, via the vacuum pipe on the top from the manifold you will have 15psi boost referenced to the top, plus your origional 5psi of spring pressure so you will effectively have 20psi of force holding it shut. ;)
I have mine set quite light so durring off boost its open via the vacuum from the manifold and acts abit like a priority breather, then it will close under boost and seals fine.
thanks again slingy. which exactly bov d'you use?
the flange is almost finished
http://i1175.photobucket.com/albums/...r/DSCF4827.jpg
looking good in every position
http://i1175.photobucket.com/albums/...r/DSCF4825.jpg
fabbin the lower tank
http://i1175.photobucket.com/albums/...r/DSCF4826.jpg
This one. Just a Greddy copy diaphram type BOVQuote:
Originally Posted by Surt
with the lightest spring fitted.
http://i557.photobucket.com/albums/s...7042011054.jpg
yup, so called rs type bov that ive got for my other project. but i thought both of them r of the similar construction just different design, arent they? i also cant understand slingy how urs can work as a priority breather once it opens one way?
Well, mine will open with just engine vacuum while running, so all off boost riding and criusing, the bov is open so the engine is sucking a good qantity of it air from the bov outlet rather than through the turbo and upipe.When you crack the throttle open the vacuum drops, the bov shuts and the turbo pressurises the system and the bov stays shut untill the next gearchange and throttle close.Quote:
Originally Posted by Surt
if so it must be open when the engines not running?
Maybe not. The vac will hold it slightly open when the engine is running. when the engine is off(no vac) the slight spring pressure would keep it closed. Slingy are you concerned about unfiltered air going into your motor? i know it wouldn't be much but i was always told any dust is bad.
i dont get it! vacuum suck in the valve puttin it into its seat, so a slightest spring does in the same direction, coz it pushes down the valve. but when ur havin a positive pressure, air works against the spring and the valve pops up. i would understand if the valve was reed-type, i.e. had holes and a membrane...
as for the unfiltered air i have the same feeling mate
plumb back ?
if u make a recycling line from the bov outlet to the air filter before the turbine, ur gunna have vacuum there all the way, if after the turbine, u will have no vacuum at all, so the only way out is an indepandant air filter on bov
NO, dont worry about what forces are acting on the face of the valve in the up pipe. Its the pressure change on the top side of the diaphram/ piston via the small vacuum line that is important to its function. This small line must be fitted to the engine side of the throttle butterflys so its see both engine vacuum when throttle is closed and the boost the engine is getting when the throttle is open.Quote:
Originally Posted by Surt
So when there is boost acting on the valve in the up pipe, there will be the same boost pressure on the top of the valve (via the small vacuum line), plus the spring pressure holding it shut.
When the throttle is closed for a gearchange the boost pressure builds in the upipe trying to push the BOv open, but at the same time, the top of the BOV is exposed to the engine vacuum from the throttle being closed so this vacuum force pulls the valve open as well.
Yeah, a seperate filter is the only way really, must get around to getting one, or i might just try winding the spring preload up untill its stays shut all the time and see how that goes anyway.
yeah that makes sence to me slingy. you can buy smth like a 36mm air filter, i bought one for my air shifter pump
http://www.ebay.com/itm/36mm-Sports-...item3f099e28a3
the ic mods r finished, just may be i'll add a few duct mounts and cut off the holes that arent in use, it weighs in 3.495kg instead of 5.800kg before mods
was
http://i1175.photobucket.com/albums/...r/DSCF4467.jpg
now
http://i1175.photobucket.com/albums/...r/DSCF4828.jpg
http://i1175.photobucket.com/albums/...r/DSCF4829.jpg
a bung for additional air temp sensor just to calculate the i.c. efficiency
http://i1175.photobucket.com/albums/...r/DSCF4830.jpg
IC mounts and mock-ups
http://i1175.photobucket.com/albums/...r/DSCF4837.jpg
I like the bungs on each side of the intercooler for AIT sensor. On my data logs you can see the inlet air temp rise and fall with the boost, as the air heats through getting compressed. its not alot at 10psi, like 7 or 8 deg C over the normal inlet temp but interesting to see. And would be cool to actually see the effects of the IC also. Good work Surt.
thanks Jack, i'd luv the iat readings before and after ic to be shown in real time on graphs along with other data like air pressure, spark advance, afr, revs etc. also it would be nice to know the pressure drop comparing readings from the comp housing and tbs, to see how really effective the ic and the whole air supply system are
Heres a screen shot from one of my data logs .
Red line in top row is MAP, Yellow line in bottom row is IAT, so you can see how it follows the boost.
You can see how the iat starts at 39.6 degC and ends up at about 48 DegC so about a 9 or 10 deg change.
http://i557.photobucket.com/albums/s...giatsample.png
yup its awesome to see what actually happens inside and to tune it, would luv to learn reading the graphs like a book, just can't wait!
BOV flange's shaped with a jig saw
http://i1175.photobucket.com/albums/...r/DSCF4839.jpg
bungs shaped with an angel grinder
http://i1175.photobucket.com/albums/...r/DSCF4840.jpg
assembly
http://i1175.photobucket.com/albums/...r/DSCF4841.jpg
holes and bungs for bov, iat and water injection
http://i1175.photobucket.com/albums/...r/DSCF4842.jpg
the master of :make" is at it again,nice work
thanks heaps Pete here its comin, listen to the tunes and drool over piccies
http://www.youtube.com/watch?v=jGHB6En88Tg
forgotten to show of with the ic mounts
dunno why photobucket turned it up tho
http://i1175.photobucket.com/albums/...r/DSCF4856.jpg
http://i1175.photobucket.com/albums/...r/DSCF4858.jpg
happy birthday surty ol boy.
I'm always amazed by your hand crafting skills. just brilliant.
Onya Surt never cease to amaze with your patience an ingenuity
2nd the birthday wishes Mate
That is some really cool work Surt. Happy birthday to mate for the other day.
thanks mates you're making me to show off harder lol
here you are
http://i1175.photobucket.com/albums/...r/DSCF4859.jpg
http://i1175.photobucket.com/albums/...r/DSCF4860.jpg
http://i1175.photobucket.com/albums/...r/DSCF4861.jpg
http://i1175.photobucket.com/albums/...r/DSCF4862.jpg
http://i1175.photobucket.com/albums/...r/DSCF4863.jpg
http://i1175.photobucket.com/albums/...r/DSCF4864.jpg
http://i1175.photobucket.com/albums/...r/DSCF4865.jpg
my first hand made tube, im pleased with the result, took me awhile to make it roundy round haha. its ф61mm from a .8 ti sheet
http://i1175.photobucket.com/albums/...r/DSCF4866.jpg
http://i1175.photobucket.com/albums/...r/DSCF4867.jpg
http://i1175.photobucket.com/albums/...r/DSCF4869.jpg