Q: Styrene sizes for 1:25 Scratchbuild,

Hey everybody. Just wanted to give/get some information on the subject. I'm going to scratchbuild a turbo, and turbo manifold for a revell 1:25 ITR. I have currently .100 styrene rod that I'm planning to use for the turbine itself. Do I need something bigger/smaller for my compressor housing? Will the .100 be small enough for the turbo manifold? What size tubing/rod will I need to properly plum the turbo and the intercooler?

BTW, I searched google and got some damn good pics of B16 turbo vtec's. I'm stuck on something. if all the exhaust gets shot directly into the turbo, where does it exit and it's spun the turbo up? Meaning, where do I connect my exhaust piping to on the turbo?


Thanks.

if all the exhaust gets shot directly into the turbo, where does it exit and it's spun the turbo up? Meaning, where do I connect my exhaust piping to on the turbo?


This may help you with this part of your question:

http://static.howstuffworks.com/gif/turbo-plumbing.gif

http://static.howstuffworks.com/gif/turbo-parts.gif

You can see more here:
http://auto.howstuffworks.com/turbo1.htm

thanks freakray...now I just need proper styrene sizes.

i usually make the compressor housing slightly bigger than turbine. but i guess it doesnt make that muc of a difference on a honda motor since the turbo is gonna be small. i actually made a turbo for the b18 out of tree parts but it was too big and i wasnt able to fit the radiator and fans. either i move them, or i make smaller turbos...

I already planned to move the radiator forward to make room. hey, the last itr I did, I chopped, and dremmeled so much, I pretty much converted it to rwd and put a small block v8 in it.

I have many large images of turbos. They're not Honda's, but I guess it should work. I'll be happy to share them with you.

.100" rod seems a bit small IMO. Equals about 1" in 1/24th scale, so i'd figure it should be larger, but its not in front of me so its hard to tell.

I figured a 2'' in 24th scale was about .080, so I decided to use some .218 for the compressor, and some .100 for the turbine, at first it looked kinda odd, but I really like the way it looks. petercardoso, sure, any turbo reference pics you can share would be great. Just PM them to me.

BTW, the .100 is too large to build the mani with, so, would about .080 or so work? or do I need something larger/smaller?

It's quite a large file to PM you (4 Mb) ..well, to be honest, I don't even know how to attach a file in a PM..

I figured a 2'' in 24th scale was about .080, so I decided to use some .218 for the compressor, and some .100 for the turbine, at first it looked kinda odd, but I really like the way it looks. petercardoso, sure, any turbo reference pics you can share would be great. Just PM them to me.

BTW, the .100 is too large to build the mani with, so, would about .080 or so work? or do I need something larger/smaller?

Your right 86 SR5, I was in mm. mode, my bad.

so, I'm going to take the motor with me today and compair the header, and the block where the piping attaches to get an idea on the right size rod for this.

Peter, can you send them through e-mail?

If so send here: t-jet_396@cox.net

I would, but your email account limit is too low...

damn, oh well. any other way you can think of to get them to me?

do any of these images illustrate the plumbing of a turbo? because, im scratchbuilding a turbo too, and nee help with the plumbing...

Im also building a turbo, if anyone can post any usefull pics that'd be great

Ok then! Since many people are asking for these images, I resized and uploaded them. If you want/need a particular image, I'll send it in the original size. :)

If this is not, in any way, what you guys wanted, tell me and I'll delete the post so it's not so heavy.

http://www.imagestation.com/picture/sraid100/p11f2c05966ca8b9d73d22aa226afc1cd/f9e8f5f6.jpg
http://www.imagestation.com/picture/sraid100/p108369d18761e1c3191c80428742341f/f9e8f5f0.jpg
http://www.imagestation.com/picture/sraid100/pc22fafa7846ea369e2e80ea0a4987cb0/f9e8f5ee.jpg
http://www.imagestation.com/picture/sraid100/pb2b972704e88a5e1a787d7d74e5cbfaf/f9e8f5e7.jpg
http://www.imagestation.com/picture/sraid100/p7177432e186c2ee9d8100c872bb55ce7/f9e8f5e1.jpg
http://www.imagestation.com/picture/sraid100/p65ce34dc0b05de3f6593e43bba29fcdc/f9e8f5dc.jpg
http://www.imagestation.com/picture/sraid100/p7334e4caab78fb02a23161b6ff405d65/f9e8f5d5.jpg

Peter, mine's so close to being done. But, where do the blow-off valve, and the wastegate go? how can I make them?

Those are great Peter. Here's what I'm using as references. Credit to the builders whose pictures these are for.

http://files.automotiveforums.com/gallery/watermark.php?file=/503/98589turboacura002.jpg

http://files.automotiveforums.com/gallery/watermark.php?file=/503/98589turboacura001.jpg

http://files.automotiveforums.com/gallery/watermark.php?file=/503/98589683716dsc00497.jpg

http://files.automotiveforums.com/gallery/watermark.php?file=/503/98589170067turboview.jpg

http://files.automotiveforums.com/gallery/watermark.php?file=/503/98589tubo_b16_2.jpg

http://files.automotiveforums.com/gallery/watermark.php?file=/503/98589Tubo_B16.jpg

Please correct me if I'm wrong, but isn't dump valve and wastegate the same thing?

http://files.automotiveforums.com/gallery/watermark.php?file=/503/98589170067turboview.jpg

I think it's that blue valve coming out of the header. I guess you can me it out of a piece of sprue and shape it with files and/or sandpaper.

I really don't know. I was gona use a sewing pin with a yellow head, and glue it on the turbo, like shown in one of your pics and call it done. But I'd like it to be as close to real as possible.

Great! thanks much. now i can begin my 500 inch injected hemi, with twin turbos. but thats another story.

when's the green delivery van gona be done?

bah, I f'd the paint up so i took a break from that.

Well. I have to show everyone this. I'm so proud. I got to making the turbo manifold, and was in the process of reading super street's article on their sr20det buildup, and I said, ya know, turbo manifolds do their job, but their's nothing like a header. So, taking inspiration from the sr20 turbo header, and picturing it in my mind, here's what I've come up with. I've still got to add the wastegate/blow-off vavle, and give it a coat of chrome paint. But, I'm very happy, and hope everyone likes my drag turbo.

http://images.cardomain.com/member_images/5/web/449000-449999/449738_149.jpg

That looks great.did you heat it and the roll it around that tube?

Well, tehcnically the turbo is composed of 4 parts. 7/32 styrene tubing for the inlet(will not have a filter), .218 styrene rod for the compressor, .080 for the turbine gas spool up thing, and 1/8 give or take rod for the turbine connector where the shaft is oiled. but ya, I basically heated up the styrene with hot boilin' water, and bent it around some spru, and then glued them onto the shaft housing, cut and glued the air inlet.

Thats a good idea to use boiling water i was experimenting before with an open flame and it didnt turn out so good.

as long as you take your time and heat the plastic evenly, its not hard at all to make even the more complex peices...

lets just say plastic is a little more flamable then i thought.