How much power will i be losing by runing factory iron exhaust manifolds? i do plan on keeping them for a while until i can save up enough money to get a set of those hipo manifolds. with the stock ones i have i plan to run 2.25 inch dual exhaust that dumps before the axle
If you are using it as a street car than use the stock exhaust manifolds for a while. You can always change them out later. Not sure you'll see much loss of power unless you are hammering it.
As far as I know HiPo manifolds dont fit our cars. You can always port them before you install them, that might help a bit.
The amount of power you lose is proportional to the amount of power the engine produces. If you are running higher compression, more cam duration, bigger intake, larger carb, and better heads you could lose a lot of power. If you are runing a stock engine you don't lose much. More power needs better breathing and the exhaust is the last system in that breathing.
well its got the original stock 302 heads on it a mild cam, aluminum edelbrock performer intake and 600cfm edelbrock. other than those 3 things its stock. once i get in running i plan to take it to the local dyno
I had looked into using the hipo manifolds too. Its been some time, but if I remember right only one side will fit the other side doesnt.
It sounds like you added a potential for an extra 25-35 more hp and a bit more torque. You will gain a bit of torque but most of the hp gain will be unusable.
the guy who re-built it for me said he put an rv cam it it to give more low end to midrange power. it should have more torque that what it came wth from the factory. i didnt want to have a high rpm motor for the street
Torque beats HP on a street car any day. What is a RV cam anyways? Is it like a regrind or something? EDIT: I looked it up and it stands for recreational vehicles. Basically a cam made for torque. Its way off from my guess of a quarter cam regrind
yup thats what it is. i told him to make sure to give the motor lots of low end tourque so it will get up and go lol
The cam I used in my 351W is just a bit longer duration than an RV cam. 206 Intake and 214 exhaust with .478 lift. Absolutley smooth idle at 700 rpm but it has tons of torque with the tuned headers I built for it. Torque was right at 420-425 ft lbs at 3000 or so(I would have to look up the dyno chart) but really needed the 10:1 compression to make it work. Hp was 365 near 5000 rpm. It is a great street engine for the Torino but it will be a monster if I can duplicate the headers fo my Muskrat. The Muskrat has been lightened as much as I can and still keep it street legal. It weighs close to 2000 lbs and I would like to shave another 200 but even at 2000 with that engine it will be a real handful. I am looking forward to getting it finished up. After that I pull the wife's Maverick in for total resto - all factory except the disc brakes, 347 and headers. The car is now that medium dark blue but it will be "Midnight Blue" when completed. I may even do some silver pinstripes just to make it suit her better.
