I've got a 76 250 Mav with a C4 trans. I am planning on a Toploader swap soon. Now I am looking to build my 250 to match the BMW M3 I6. Has anyone built a really strong Ford Small I6 that can run with an M3? If so, can you tell me what you have done to achieve this? Thanks, Ken
"BMW M's engineers boosting maximum output to 360 bhp (265 kW) at 7,900 rpm from 3.2 litres capacity, that is a sensational output-per-litre figure of 111 bhp. Maximum torque, in turn, is 370 Nm (273 lb-ft) at 4,900 rpm". I am looking at the CLI M3. Year, does it really matter? I dual wieght flywheel and variable cam timing is killing us. Well, lets see, the single barrel carb, log manifold, non variable cam, non fuel injection and no computer to control all this. OK, that's what I'm trying to play with with a 250 I6. I can play with the wieght of the car, and would like to get 250 to 275 flywheel hps from the engine. Can this be achieved? Thanks, Ken
Can I tell you Ken that... This thing was a pig!! I dont think it made 300 rwhp. Can I also tell you that it had a supercharger on it . Now, to make things fair...it wasnt mapped yet, but still. You dont need no computer or f.i. to make your six run, just good ole' ingenuity. thats jmho.
Wasn't sure if you knew about it or not. The people there can probably tell you exactly down to every last nut and bolt what you need to do to make that 6 cylinder put out however much power you want.
That's not anwsering the question. What will it take to build a FORD 250 I6 with this type of power? Ken
No problem Jamie. Yes I am on their site too. I still want to whip up on an M3..... if possible. Thanks, Ken
Ken, I don't think you are going to build a Ford 170-200-250 I6 to beat an M3 without spending major, major bucks and very possibly taking away streetability. You will have to go with an Aussie or Argentine head, raise compression (either by piston/shaving head or super/turbocharging) to where street gas may not work, and most likely will have to use a very radical cam. I think you can get 275 HP out of one with a stock head and major porting, a cam to turn up to 6500 rpm, raising compression, and multi-carbs.
Terry, I think you are right. Maybe it's time to find a good running Aussie 250. Now wouldn't that be fun? The kind of power I want won't happen with this engine. Thanks for all your help, Ken
The Ford Six guys are working on an Aluminum Head based on the Aussie head ... will allow use of custom intake, 2V or 4V or multi-1V carbs and headers. Add some roller rockers and other goodies and it should be pumping out some horsepower.
From what I`m reading and researching on the 250 I6, it`s not impossible to build a 250 that will hang with V8`s !! If you reasearch Fordsix.com you will find guys producing 250 to 350 rwhp on 200 I6`s with stock bottom ends. Here`s a setup for you to look at... T4 57 trim turbo, intercooler, 350cfm carb (open the intake up from 1.5 to 1.75), boost referenced fuel regulator. With a turbo setup you don`t want high compression so there`s no need for different pistons. Other than maybe a little beefier cam I would leave the bottom end alone. Also, along with the power factor, the BMW has an advantage with it`s handling ability and low stance. I`m sure that`s not the only advantages but IMHO you can definitly build a respectable 250 I6.
