Time to add a little more power

The 75' Fury wagon that I posted with 1st has 59K & like the 79 Has been parked for a while. It runs decent but has a hesitation. To fix this I'm pulling the engine & changing the heads over to Magnum heads the cam to a factory Purple Stripe. the intake is a Professional Products Crosswinds headers from Hedman the carb is a Edelbrock with electric choke. I'm upgrading the alt to a Denso 200 amp. The underhood will get a cleaning & detailing here's the 59K original under the hood now

 

SOUNDS LIKE A PLAN MAN , GOOD LUCK AND KEEP US POSTED

 

Oh hell yeah, now your talkin! What do you have planned for pipes and mufflers?

 

I have a buddy with a 440 in a half ton dodge 2wd truck, he went with 3" pipe and dual flowmasters that dump in front of his back wheels, sounds mean as hell. Shakes the ground by gum!

 

You even write like Barney talked by gum. 440's are some danged good engines.

 

2 1/2" with an H & flowmasters through the bumper where the reflectors were. 3.91's & 500 OD down the road. I worked on it today. Once the exhaust is done thaem we'll see about dropping it 2" in the front & 3" in the rear. I found a 75 Road Runner dash with a tach that will fit it.

 

What's that about Barney??

http://www.youtube.com/watch?v=de_P2aUZJyA

 

H pipe will help, but you can overload it at higher RPM's and actually lose power, you should go with a true X pipe.


The firing order of all production V8s, regardless of make, has one cylinder in each bank that will fire within 90 degrees of crankshaft rotation of another cylinder in the same bank. This occurs twice during completion of the entire firing order. These two cylinders will be exhausting almost simultaneously into the same exhaust manifold system.

Full-length four-tube headers help separate these pulses until the collector is reached. If this is a full race car running "open exhaust", you will notice the collector dumps into a short open pipe at least 2.5 times the size of the header pipes, or the header pipes dump direct without a collector. This is done to avoid the conflict of pressure caused by the timing of the 2 counter firing cylinders, which will create back pressure and degrade torque, horsepower and general performance, especially at higher RPM.

On a full exhaust system, after the header tubes dump into the collectors, the two close firing cylinders are fighting each other for space in the collector and exhaust pipe. The result is reflected pressure waves traveling back up the exhaust system, backpressure, lost power and poor economy.

At the same time two cylinders exhaust in one bank, there is no activity in the opposite bank. The traditional H-pipe equalizer allows some of the excess pressure to bleed over to the 'quiet side' of the exhaust system, resulting in some low and mid-range torque improvements. At high RPMs, however, in traditional exhaust systems, the gases cannot bleed across the H-pipe fast enough to help power significantly. Performance systems with the H pipe design, attempt to over come this by using a shorter cross over pipe which is also slightly larger in diameter as the main exhaust, then would be used in a standard exhaust.

To overcome the power loss of "over loading" the H pipe design, Exhaust manufacturers came up with the X pipe design, which features a tangentially Siamese crossover junction to synchronize exhaust pulses. The X-pipe concept is to split the flow in the crossover junction, so the pressures on both banks will be equal and pulse-free after the crossover, regardless of the rpm. Volumetric efficiency and power are therefore improved at all engine speeds. The negative aspect to the X pipe design is, because of the crisscrossing of the flow stream, harmonic pulsations will develop on some systems at certain RPMs, which will be perceived as a buzzing or humming sound.

 

Nip it Mike! Nip it in the bud!

 

Hide his gun Mike and I'll hide his bullet!

 

Hey dude I applaud your post This is an engine that will pull to 5300 RPM tops Blow COLD A/C etc The X takes more space under the car & is overkill.

Now the SWB Dodge that I put the 500 CID B1 in will have an X A friend of mine & myself used to hold quite a few Fastest Street Car Shootout titles in the big tire class & the small tire class at the same time 8-12 years ago. We used to get NOS stuff to test Hi flow nozzles & valves

 

Barney always kept a spare in his sock drawer. Mines under the front seat

 

daaam.....thats alotta work to get rid of a lil hesitation...

 

I want to clean & detail it under the hood anyway. Change all the gaskets & seals freeze plugs etc. This car has 59K & has sat for a while. All the brakes will get changed (calipers,wheel cylinders,hoses etc)

This car came from the 55MPH time zone it's getting lowered too so it can cruise 70+ economically I believe I can get 20 MPG hwy with 3.91's & a 500 OD trans. There ain't nothing like having 3.91's-4.10's to use for passing.


It will be the ultimate Family vacation vehicle.

 

I've decided to pull the trans & clean the outside of it & reseal it too. It's almost ready to pull now. Pics are coming!