75subie Posted August 30, 2005 Share Posted August 30, 2005 is it worth taking the emissions system off a brat?any power increase?what can be removed so the truck still runs?i have been thinking about doing this and adding a weber when some cash starts coming in.thanks Jon Quote Link to comment Share on other sites More sharing options...
Camelwagon Posted August 30, 2005 Share Posted August 30, 2005 Do you not do emissions tests in your state or city? Then you can take off watever you like, make sure it still runs first... Quote Link to comment Share on other sites More sharing options...
75subie Posted August 30, 2005 Author Share Posted August 30, 2005 for a car this old, they don`t check emmissions. Quote Link to comment Share on other sites More sharing options...
subarunuts Posted September 1, 2005 Share Posted September 1, 2005 No on the power increase - you can remove almost everything - AIS and EGR ports will need to be blocked - I use the pipe fittings already there and weld them up. If you plan to keep the Hitachi then there is the matter of the bowl vent line - has to be open, but unless you want to smell gas, then you'll need to run it to a charcoal canister and use one of the existing purge valves to burn off the vapors once the engine reaches temp. Same goes for the tank vent line. There really isn't much in the way of emmissions on there anyway - AIS (passive - exhaust pulse type), EGR, and the evap system - but unless you like the smell of gas you need something for the evap. Other two are up to you - EGR lowers exhaust temps by a lot - good on some engines for keeping the valves from burning - EA81's don't seem to care much either way. AIS is totally useless except for assisting catalytic action - I always remove or disable it with quarters since the reed valves do fail at some point causing molten plastic to get sucked into the carb. Quote Link to comment Share on other sites More sharing options...
coronan Posted August 25, 2015 Share Posted August 25, 2015 EGR also helps with fuel economy. Autospeed.com has done articles on it. Quote Link to comment Share on other sites More sharing options...
ihscout54 Posted August 25, 2015 Share Posted August 25, 2015 (edited) Holy ancient thread batman! Egr valves dont exactly increase fuel economy. It does aid a little in mpgs during highway cruising. If one was to properly remove this device on a carbed engine the jet sizes would need increased and the timing could likely be advanced. This may yeild a little more power and hence the over all fuel consumption just might remain very similar. Theres a bit more benefits of EGR function, and I always elect to keep them. Edited August 25, 2015 by ihscout54 Quote Link to comment Share on other sites More sharing options...
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