PICs of second gens with CARBYS please
#26
Originally Posted by DAN CARWIN
Puma rotary, I'm sorry to say that you will more then likley be upset with the power loss with going with the 45dcoe sidedraft. I had the same set up and was HORRIBLY dissipionted with the out come. I went with 50mm sp webber and was a litlle bit better but still not up to stock HP specs. I wish i would have left it FI. BUT I also am in higher elvation 5265FT above sea level. LEt u sknow what you think though.
So if anyone should have a more positive experience , cry out !
regards
Puma-Rotary .
#32
I'm a boost creep...
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Originally Posted by mazdadude
Im thinking about a weber 48mm IDA, how good are these carbs?
should i go with a 51 instead?
#33
Rotary Freak
I hate to hijack, but would it be possible to use the manifolds for a Weber sidedraft setup and instead use individual throttle bodies? Wouldn't you just simply have to plumb the manifold for fuel injection?
#36
Rotary Freak
Originally Posted by NZConvertible
Much better idea.
#37
I'm a boost creep...
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You don't use an adaptor plate, you use IDA-style TB's that bolt direct to a Weber manifold, like this one from Injection Perfection in Australia.
BTW, when I said "much better idea" above, I was referring to the EFI TB's, not the PP suggestion.
BTW, when I said "much better idea" above, I was referring to the EFI TB's, not the PP suggestion.
Last edited by NZConvertible; 02-26-05 at 07:24 PM.
#41
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I love how much a carb frees up the engine bay!! It makes it look so simple yet very cool. If i get a weber im gonna keep the big stacks and just put some screening over them to help filter crap out.
#42
The mystery of the prize.
running dcoe's on a fc3s like that with nothing along the lines of a ram air duct in the top of the hood bringing cold air to the filter right on to of the engine block is losing alot of power to hot engine bay air.
If you do something along these lines you need to put a plenum/air box on the trumpets and duct some cold air to it. I have the TWM dcoe throttles on my fc and ran with screens over the trumpets for a short period while I finished things up, the heat soak in the engine bay would bring intake air temps up to 175 F on a 60 degree day. This is horrible for performance, the stock intake does a better job of keeping the hot engine bay air out.
If you do something along these lines you need to put a plenum/air box on the trumpets and duct some cold air to it. I have the TWM dcoe throttles on my fc and ran with screens over the trumpets for a short period while I finished things up, the heat soak in the engine bay would bring intake air temps up to 175 F on a 60 degree day. This is horrible for performance, the stock intake does a better job of keeping the hot engine bay air out.
#46
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Originally Posted by rxseven07
well do u know of any "cold air intakes" for the weber? didnt think so...
Thats from www.xtremerotaries.com, an aussie based company that makes alot of goddies.
so we have to deal with it
#47
The mystery of the prize.
Originally Posted by rxseven07
well do u know of any "cold air intakes" for the weber? didnt think so... so we have to deal with it
Accepting that your setup is taking in hot engine air and leaving it that way is by no means dealing with it, it is ignoring it. You can make an air box for the DCOE carbs, or you can buy one from a company that sells em like someone else has already posted pictures of.
TWM also sells a air box for their throttles that can be used on their DCOE efi throttles, it's not that difficult to make one.
At the very least you could add a reflective heat shield between the engine block and the air filter to help keep the radiant heat from the block away from the air filter area, this combined with a scoop on the hood bringing fresh air to the top of the air filter would probably work well. One could make a simple partial box around the the filter that would seal up with the hood when closed with a scoop on the top, keeping engine bay air out of the inlet and getting nice fresh air directly to the filter.
#49
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The air box allows you to place your filter outside of the engine compartment where you can duct cooler air to the intake instead of using the hot air under the hood. The intake tube can be run where ever is convenient for your application. On most RX-7's with a carb you would idealy want it infront of the radiator or where the headlight assembly is but thats not the only way.
#50
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sorry u misunderstood me, i clearly understand what it does and is used for but by the looks of that application i cant picture where it would run too. but thanks