Guest Anonymous Posted May 18, 2003 Share Posted May 18, 2003 DELETE Quote Link to comment Share on other sites More sharing options...
Pop N Wood Posted May 19, 2003 Share Posted May 19, 2003 Hope I am wrong, but I don't think you will get many replies to this one. BBC Z's are few and far between. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted May 19, 2003 Share Posted May 19, 2003 DELETE Quote Link to comment Share on other sites More sharing options...
ZROSSA Posted May 19, 2003 Share Posted May 19, 2003 Got a sbc but it runs a single 3.5 inch pipe. It was done by the prevoius owner and doesnt fit at all well. I would say that you are going to be really lacking space. Do you really need all that pipe? I realise that you are planing some big mods but twin 3.5s will suport a hugh amount of Hp. Douglas Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted May 20, 2003 Share Posted May 20, 2003 DELETE Quote Link to comment Share on other sites More sharing options...
ZROSSA Posted May 20, 2003 Share Posted May 20, 2003 You were planning a big block were you not? I havent really done much research into the larger chevy so am going to stick with the few things I do know. Firstly I think you could reach your hp targets with 3 inch duals. I had a look at the trans am road racing exhuasts recently. These cars are putting out around 700 hp. They must run through dual 3 inch, or a sigle 4 or 5 inch. A formula 1 car has around 850hp and they look as though they run through 2.5 - 3 inch pipes. I think when people suggest really large pipes they are talking about situations where the pipes are open. If you have a proper x or y pipe it might scavenge a little better so you wont need as large a pipe. I get the feeling from what i have read, that with the fireing order of the 90 degree crank, a v8 kind of needs a larger collecter becuase of the exhust pulse not being evenly spaced. You then have to have a larger pipe to match. I think that if you run 180 degree headers you can also use a smaller pipe becuase the pulses are properly spaced. Another option is the 3.5 inch into a x pipe and the 3 inch out. It looks like that past the trans is were you really run into space problems. I know you have spent a lot of time studying camshafts of late but exhuast is going to need some research as well. Most likely you will need to do complete custom headers to really take advantage of the rest of the engine. Anyway, Let me know what size engine you are running and i will look some stuff up in a few books i have here gathering dust. Couple of interesting places to look: Burns stainless Headers by ed Sghenfeld headers Dr gas Sorry you will have to do a search, Compter will dump this if I link them. Cheers Douglas Quote Link to comment Share on other sites More sharing options...
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