1) If you paid 800$ for that manifold from HS, you were ripped off. Sorry.
2) A collector like the ones that javier b14 posted are anythign but easy to weld. Please not the *INSIDE* of the collector is welded. that means the collector was welded inside and out. Easy? I think not, if you are a tig welder, try welding a colector from the inside sometime, let me know how well your torch fits in there. Note that the HS manifold was not welded internally.
3) Definately grind out your collector, if nothing else, for the fact that you know that an oxidized ball of burn thru from hotshot wont hit your turbine at 120,000 rpm.
4) If you plan on using a burns collector, dont get a 304, it will crack very very quickly. You must use 321 or else thickwall 316 like us.
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"we are the music makers, and we are the dreamers of the dreams" -- willy wonka
I know they are not welded internally. I will say the welds inside look better in person than the picture, not as intrusive as they appear.
The collector area will be cleaned up, that has already been stated in this thread. What kills me is the flange and ports where the manifold connects to the head is very clean in comparison. Cleaned up nicely.
I am not going to build a manifold with a burns collector. I am going to use this manifold.
FWIW the other welds on the manifold look good to me. I am a very detail oriented person, so I wish I had the knowledge of welding and fabriction prior to even thinking about a turbo setup, I would probably be building my own kit.
My wife did buy me an arc welder for christmas, I hear it;s the hardest form of welding to master, so I'm going to try my hand and possibly take a course at the local technical college to learn more of the metallurgy (sp?) aspects of fabrication.
the HS is a pulse converter manifold, designed to spool the turbo up quickly, using pulse energy from the motor, as well as heat energy and expansion of the hot exhaust gasses. By pairing up cylinders 4-1 and 2-3, the turbine is hit with 4 discreet pulses with every power cycle of the motor. This cylinder pairing also helps reduce power-robbing reversion and improves flow. This design is unique to Hotshot. The manifold is made from heat resistant 304 stainless
Originally posted by James Why did they change the design then Mike?
For it to package better, it is still a pulse converter type, just not as optimized. It is a street kit designed to fit in a street car with a minimum of relocating things. It sacrificed a little power and spool for ease of fit in the engine compartment.
Mike
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The part will work, but they really should get a new welder. I've been welding for a living for many years, and I'd be hunting another job if I put down welds like that. If they had run a purging gas inside while welding they could have really cut back on the mess inside. The header will work, I'm sure, but people really do want a part that looks nice when they pay that much money.
BTW..if you guys got any welding jobs you need, let me know. Just make it worth my time and I can help you out with work or advice, should you have it done elsewhere or want to try it yourself.
Originally posted by FFgeoff A collector like the ones that javier b14 posted are anythign but easy to weld. Please not the *INSIDE* of the collector is welded. that means the collector was welded inside and out. Easy? I think not, if you are a tig welder, try welding a colector from the inside sometime, let me know how well your torch fits in there. Note that the HS manifold was not welded internally.
4) If you plan on using a burns collector, dont get a 304, it will crack very very quickly. You must use 321 or else thickwall 316 like us.
It's not all too hard to weld inside of the HS manifold pictured above. It can be done, but the easiest thing is to make the proper fit and then weld it from the outside, getting full penetration (purging inside, of course).
As for the type of stainless...you will probably have the same problems out of 316 that you will 304. The choice to use 316 over 304 is mainly made for corrosion resistence either externally or internally. However...if you got the equipment and knowledge, fixing a crank that may occur isn't that big of a problem.
Well.
.......its a lot like driving, seat time or practice makes a huge difference.
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