rsb502 Posted August 1, 2015 Share Posted August 1, 2015 I need to talk to one of the guys that has the Francis headers, especially if oy got the smaller crossover pipe, pm me and I'll send you my phone #. For all the E9 guys, I hope to have a cheaper manifold replacement ready soon. 1 Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment Share on other sites More sharing options...
75T Posted August 1, 2015 Share Posted August 1, 2015 Great idea,sorry I don't have any spares to help with the project. Quote Link to comment Share on other sites More sharing options...
rsb502 Posted August 1, 2015 Author Share Posted August 1, 2015 Don't need spares need questions answered. Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment Share on other sites More sharing options...
screwylouie010 Posted September 9, 2015 Share Posted September 9, 2015 any updates? Quote Link to comment Share on other sites More sharing options...
Mack Doctor Jr. Posted September 9, 2015 Share Posted September 9, 2015 Call me I can get some info or who to call. 1217 202 6324. Joey Quote Link to comment Share on other sites More sharing options...
Mack Doctor Jr. Posted September 12, 2015 Share Posted September 12, 2015 3/4 flange for the head. 2 3/8 header pipe. And into a 3 1/2 collectorThis is what Greg Dean uses on Bad Dog. It's all. SS and is tubing not pipe Quote Link to comment Share on other sites More sharing options...
screwylouie010 Posted September 12, 2015 Share Posted September 12, 2015 any idea on the wall thickness? I'm considering making a set my self, just have no shop to work in, will have to be done out side. I was thinking of using heavy duty stainless bellows or flex joints between each head and on each side of the turbo, all connected with vband clamps Quote Link to comment Share on other sites More sharing options...
Mack Doctor Jr. Posted September 12, 2015 Share Posted September 12, 2015 I know piping is thicker than tubing. Quote Link to comment Share on other sites More sharing options...
AZB755V8 Posted September 13, 2015 Share Posted September 13, 2015 I don't understand what headers will do better when installed on a stock engine. If this is about the supply of manifold parts being gone and the only solution is header I get it. I have two Hot E9's one at 1100 plus HP and the other 1250HP both have cast manifolds. Each has work done by Dale Francis and Steve Trivets but I do not see a need for headers even at over 3500 RPM nor did they for this power level. Headers look nice but for stock 1800-2000 RPM I think they would decrease power rather than make more with a stock engine. If I could get 50 plus HP or more I would consider a set. What am I missing?Tubing comes in several wall thicknesses and can get pretty thick. Racing headers are normally on the thin side. Thicker would be better for longevity in a truck. Quote Link to comment Share on other sites More sharing options...
Mack Doctor Jr. Posted September 13, 2015 Share Posted September 13, 2015 Thicker is better for holding the heat in for making horse power too. That's why they wrap headers. 1 Quote Link to comment Share on other sites More sharing options...
e9500v8 Posted September 14, 2015 Share Posted September 14, 2015 The reason for making is stock manifolds are notorious for leaks. I had dale rework my manifolds an they still leak. I have had enough. Quote Link to comment Share on other sites More sharing options...
screwylouie010 Posted September 14, 2015 Share Posted September 14, 2015 (edited) yea i only want to fix mine once. my manifolds are fine but the sections going from the manifolds to the turbo are shot. i started pricing stainless tubing and elbows. they are spendy but not to bad. especially when I compare it to the price of the francis headers. if I do make a set they will be log style manifolds Edited September 14, 2015 by screwylouie010 Quote Link to comment Share on other sites More sharing options...
AZB755V8 Posted September 15, 2015 Share Posted September 15, 2015 I was thinking of log manifolds for one of my projects. I've had leaks as well but did not see what tube headers would do besides make a lot of under hood heat and have to be wrapped like Mack Doctor Jr said. Has anyone looked into square or rectangular tubing. If someone made up sets would there be interest in them and what would they be worth? Quote Link to comment Share on other sites More sharing options...
Mack Doctor Jr. Posted September 15, 2015 Share Posted September 15, 2015 That was what I had in mind! Square tubing! It would resemble the stock ones but flow a little better. Just have to figure out how to make slip joints that don't leak. Quote Link to comment Share on other sites More sharing options...
brutus998 Posted September 18, 2015 Share Posted September 18, 2015 the cfm you gain in the headers is crazy. you can have the smaller crossover pipe if you request it. Quote Link to comment Share on other sites More sharing options...
AZB755V8 Posted September 19, 2015 Share Posted September 19, 2015 The gain in CFM's in the headers is really understandable but all the exhaust still has to go though that little approx 1 1/4 x 2 inch port into the turbo from each side of the engine. Gas velocity is low in the headers and has to accelerate in the crossover tubes and into the turbo. High velocity gas is what spins the turbo not volume.Headers work by scavenging gasses out of the cylinder. This can not be done with back pressure from the other cylinders pushing back on the exiting gas as in a turbocharged E9 engine. Maybe at 4000 RPM's or more but there are just a handful of E9's spinning that at truck pulls.I have raced and had headers on things for 35 years and still do. They don't work on anything until 4-5000 RPM's. I've went back to manifolds on several vehicles and picked up torque and hp at lower RPM's where normally used. 1 Quote Link to comment Share on other sites More sharing options...
Mack Doctor Jr. Posted September 19, 2015 Share Posted September 19, 2015 Header wrap may help too. Smaller header pipe too. I wanna try square or rectangular tubing on my build Quote Link to comment Share on other sites More sharing options...
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