|
|
Post by mrjason on Apr 27, 2014 20:50:53 GMT
so i am doing a little blow through turbo project myself, here's a pic of the manifold i am going to use... not sure if you want dimensions?, but can give if you want? plenum... one question i have is, the turbo i got with it has had the little door? (not sure of propper name! ) pinned shut!. what difference will this make?.
|
|
|
Post by mattturbocar on Apr 27, 2014 21:29:49 GMT
That little door is known as a waste gate. Normally used to control boost levels.
|
|
|
Post by mrjason on Apr 27, 2014 21:32:55 GMT
thanks matt what will happen if i use it like it is now? would it be a problem/ (me turbo novice!)
|
|
wombat258
Oviraptor
Posts: 17
Bikes: GSXR1100WS
Reg: Dec 1, 2013 9:30:22 GMT
|
Post by wombat258 on Apr 28, 2014 9:24:23 GMT
With the internal wastegate closed you have no means of controlling the maximum boost pressure. Depending on the turbocharger you could overboost and damage the engine. You will have to use an external wastegate to control the boost pressure with that setup. Google "external wastegates" to get an idea of setups.
|
|
|
Post by mattturbocar on Apr 28, 2014 13:47:59 GMT
You could try to manage the boost pressure going into the engine using some kind of dump arrangement. That in turn might prevent too much gas driving the turbo and overspeeding it. This may also be helped to work if the tailpipe is restrictive (which will discourage boost), or the charger is really small. I think in the old days those were the sort of things people did, but in the old days turbos were rubbish.
In practice, everyone seems to use a dump valve (either internal like yours but not blocked, or external) as it works well. I think you will struggle to salvage the waste gate that you have, so you need to think about an external one (or a different turbocharger).
|
|
|
Post by katana on Apr 28, 2014 19:37:44 GMT
Someone has deffo done a number on that casting with a sawz-all! You could unpin it and connect an actuator but it'll be either sound farty or bloody noisy without any pipework. As a turbo novice its an additional aggravation as the internal gates make life simple - OEM don't use them for no reason!
|
|
|
Post by mrjason on Apr 28, 2014 20:59:33 GMT
thanks guys. i have, on closer inspection of the plenum, just realized that the big nut thing on the bottom must be some kind of blow off valve?. if you look at the next pic, you can see it opens up a few mm. it is quite well sprung.... cos it trapped some skin on my bloody thumb!!
|
|
greybush
Velociraptor
Posts: 27
Reg: Jun 15, 2013 22:20:56 GMT
|
Post by greybush on Apr 28, 2014 21:06:10 GMT
in my opinion you should cut the flapper out completely and plug the actuator shaft hole, box in the gate part of the housing build exhaust piping and use an external wastegate, On my own build with a gt22 I had the optional internal gate housing, I cut the flapper out, plugged actuator shaft hole and run a tial external gate. I just had no room to run with a actuator. hope this helps
|
|
|
Post by nicearris on May 3, 2014 20:34:54 GMT
I've only ever driven draw thru bikes. Built 2 now and apart from needing to clear their throats every now and again(as said, they don't like long times at steady throttle settings as they choke up) they are great. My GSX1100EZ had an HSR42 and was a pleasure to drive on the road. My Harris has an S&S Super E and is a bit more of a handful. epends on the turbo/carb/CC setup you go for. Tial wastegates are marvellous and very nice to look at too!!!!!!!!! Heres the one on me Harris.
|
|
|
Post by mrjason on May 3, 2014 23:03:33 GMT
on my project i am hopefully going to use an inter cooler. i don't really see many bikes on here with them fitted, is there a reason why people don't seem to use them?
|
|
|
Post by katana on May 4, 2014 11:26:40 GMT
I used one but 2 bar boost air requires cooling so not optional especially on an oil cooled engine! They are difficult to size to be efficient and not look like a dogs dinner on naked bikes. They also mess up / block air flow to the oil cooler on GSXR's so another problem to look at. Use on road bikes is also questionable, regarding efficiencies at relatively low boost applications IMO.
|
|
|
Post by screwriverracing on May 7, 2014 22:06:17 GMT
Here's mine with intercooler
|
|