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tell me how it looks!!!

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anteversion

10+ Year Contributor
316
1
Jun 1, 2008
La Sarre, QC, Canada
This is my homemade intake manifold made from aluminum and all tig welded.
just want you guys to tell me how it looks for a 120$ manifold!
 

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Looks good, I really think there's more to making these then a retangle shaped box with runners welded to it though, I dunno. Your fabricating skills get an A+ for sure though!

EDIT: Did it pass a boost leak test?
 
mine looks pretty much the same. it performance is good i lost alitte on the bottom end but it made the car pull like a sob on the top still pulls hard at 8k :)
 
hahaha, no i don't wanna make another like that cause its really a PITA when you don't have all the tools to do it easy. Yes for sure there's more than a square box and runners welding in a SMIC. you need to have the right length for the runners and the right size for the plenum. Velocity stacks are proven to add between 15-20% much airflow, which i don't have in this one because of the complexity of fabricate one without good tools. i did not tested it at wot right now cause im in the breaking in period with my freshly built engine. But seems to make the 16g spooling very fast and what a nice whistle sound under boost. It passed the BLT really easy.
 
I've seen better.

JK

Why did you weld two pieces of aluminum together to make the top of the manifold, could you not acquire a large enough piece of aluminum?
 
thats another pics to show that its not only a '' square '' box shaped form. it is going tinner as it goes near the timing belt
 

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It passed the BLT really easy.

It passed the Bacon, Lettuce, and Tomato test really easy? That's fantastic!! Seriously, kudos for trying something different. Without trying something different there is no real advancement ... I understand you were somewhat limited on peformance without the ability to integrate the velocity stacks, but in all honesty this is awesome fabrication. Put it on the dyno and see what it does!!!
 
Hose clamps on a fuel system? :(

Yeah i know my setup is not perfect, but im not this kind of guy who praised all those ''you need to do it with the best brand and pieces'' . The best brand for me is '' do it the best that you can with the less money that you can. otherwise, all my money will be spent on that 17 years old car that i can only run a few mounths in a year due to heavy winter here.
 
Do you happen to have any pictures from the inside of the manifold? From the outside, the manifold looks great, but you might want to use actual fuel line for the fuel lines. The next step after you get that changed out is to throw the car on the dyno and see what it does!!!

Jerry
 
Do you happen to have any pictures from the inside of the manifold? From the outside, the manifold looks great, but you might want to use actual fuel line for the fuel lines. The next step after you get that changed out is to throw the car on the dyno and see what it does!!!

Jerry

i would post some pics on the interior tomorrow. this is real fuel hoses bought from extreme psi rated at 320 psi and its not leaking a bit. It will be better for me to have a bigger turbo but the size of it actually equals near a street size SMIM
 
Not bad, not bad at all.. there is nothing like being able to weld/fabricate parts for your own car. Nice work!

If possible, you should get it flow-bench tested and compare it to the stock manifold to see what kind of gains you're getting.
 
Hose clamps on a fuel system?
at least they'll stay on and not slip off being on tight and the owner can make sure that they are tight.

And I fully agree: do the best with what you got and afford. And it's amazing how that really works!

Good looking manifold you got there! Takes guts and determination to dive in head first to see if you can make one.

good luck as always -DSM
 
theres pics from the inside ( plenum ), throttle body flange ( before being machined ) and inside of the runners.... take note that the main flange have been made with a thicker plate and been machined before the installation
 

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get some stacks in there that will help the air turn alot.
 
Awesome fabrication skillz!! I couldn't do it... IMHO those are awesome welds, I know how hard it is to get welds that pretty on aluminum. Maybe if I had welding equipment :rolleyes:

15-20% is probably an exaggeration because that is A LOT

btw, for future SMIM's you can buy velocity stacks (horns/funnels) seperately... very reasonably priced if you search thoroughly

A basic technique for adding them is to weld a single (flat, unbent) section to the runners, weld the stacks, then weld a single bent piece shaped like this [ or this ( over the stacks... A lot more welding but easier in other ways

AND WHO WILL BE THE FIRST TO DO ITB'S on a turbo 4g63??? or has it been done?
 
still can't find a picture for a DSM... The Honda guys are catching on, and the VW guys are doing it like crazy


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Don't ask me why it works... but the dyno plots don't lie

sorry to hijack
 

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Extreme Motorsports had ITBs on their 1g AWD race car waaaaaay back in the day. I'm not sure if they still do but it was the first one I saw back in like 1999 or 2000 at the DSM Shootout.
 
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