ported E7s

shoot since ive never ran e7's, i would run the stock ones for a while and get use to it, then switch them out and see the difference so you can help everyone on here who talk about porting stock heads! let them know if its worth it. =).

Find out who the "local speed shop" was and ask them to check the heads over to see if they did the port work and the heads are in good shape. Then if you won't have anything but labor and gaskets to pay for, go for it. Just be sure that you have the tools and experience to do the job.


Cylinder head removal & replacement, all types of heads on a 5.0 Mustang

Plan on 3 days to do the job if you haven't done it before.

Day one gets the heads off in 4-6 hours. Remove the A/C compressor mount bolts and move the compressor out of the way. The A/C compressor swings out of the way without disconnecting any of the lines or losing any refrigerant.
Mark all the electrical, smog and vacuum lines with tags to help you remember where to re-connect them.

Day two gets all the gasket surfaces scraped off extra clean and the heads dropped off at the machine shop if you are going to have them reconditioned. Time here is another 4-6 hours. Whatever you do, don't skimp on cleaning the gasket surfaces. New gaskets need to seat against bare metal and not the residue left from the old gaskets in order to seal leak free. This is the most time consuming and tiresome part of the job. Look for little things that need to be replaced like the short hose from the thermostat hosing to the water pump, damaged vacuum lines and hose clamps that are rusted or broken. . Cut a piece of cardboard to fit the lifter valley and help catch all the crud scraped off the gasket surfaces.

Day three starts when you get the heads back from the machine shop. This is the time to pick up all the little odd pieces you found needing replacement on your day two inspection/cleanup. Plan on 6-8 hours to reinstall the heads and reconnect everything. Plan on an additional 2 hours to troubleshoot/adjust everything.

Now for some practical tips:

Plan on cutting the thermostat to water pump hose, or removing the thermostat housing. Also plan on removing the distributor to get clearance to remove the intake manifold. Remove #1 spark plug, stick your finger in the spark plug hole and crank. When your finger gets air moving past it, stop cranking. Turn the engine until the timing marks line up with the pointer. Make a scribe mark on the distributor base and engine block. Now you can pull the distributor out. When you re-install the distributor back in the engine, make sure you are still on TDC compression for #1 and then line up the scribe mark on the distributor and engine. You will be very close to where the engine was timed when you took out the distributor. Be sure to put a rag or cap in the block where you removed the distributor. It will save you trouble if something falls into the empty distributor hole.

You'll need new head bolts - get ARP bolts ($40) or studs ($93, maybe more). The ARP bolts have a radius under the heads. The washers that come with the bolts have a chamfer cut in them. The radius under the bolt head mates up with the chamfer on the washer. Fail to do this and the bolts will never torque down properly. All the bolts get antiseize under the bolt heads, and everything but the short head bolts get it on the threads. You need Teflon pipe dope or ARP sealant to coat the threads of the short head bolts. The short bolts go into the water jacket and will seep coolant if you don't use the sealant.

My favorite trick that saves time and effort is the stay in place gasket. Be sure that you scrape (don't use a wire brush) all the old gasket material off, then clean all the surfaces with acetone or MEK.

When the surfaces are clean, use weather strip adhesive on the head to manifold surface, and on the side of the gasket that mates to the head. Follow the instructions on the tube or can and when it gets tacky, press the gasket down on the head.

Clean the area where the rubber rails mount to the block in front and in the rear with more acetone or MEK and do the same trick with the weather strip adhesive that you did to the heads.

Coat the rubber seals and the gasket area around the water passages with lots of Blue Silicone gasket sealer and put it together. Bingo! No leaks and no gaskets that shifted out of place.

If you reuse the injectors from your old setup, a repair kit is available from most auto parts stores if needed. Coat the injector body "O" rings with oil before you use them and everything will slide back together.

For iron heads, clean the combustion chambers with a wire brush in an air or electric drill. I used a scraper for the pistons. I don't like to use the wire brush on pistons because it will remove metal very easily.

Change the oil once you get everything back together. Once the engine is up & running, run it for 1-2 hours and change the oil.

Tools: a good torque wrench is a must have item. A razor blade scraper that holds a single edge razor blade from Home Depot or Ace hardware is another handy thing. Get a Chilton or Haynes shop manual - you'll need it for the bolt torques and patterns. The intake manifold has an especially odd pattern. You'll need access to a timing light to set the timing after you re-stab the distributor.

Consumable parts:
Fuel injector seal kits with 2 O rings and a pintle cap (Borg-Warner P/N 274081) are available at Pep Boys auto parts.
Cost is about $2.74 per kit. The pintle caps fit either injectors with a pin sticking out the injector end or 4 with more tiny holes in the injector end. The following are listed at the Borg-Warner site ( BWD - Home ) as being resellers of Borg-Warner parts:

Parts Plus - Premium Auto Parts & Accessories or Auto Value / Bumper to Bumper Quality Parts & Service - Home of the Aftermarket Auto Parts Alliance Group or Tires, Auto Parts Stores, Brakes & Automotive Parts | Pep Boys or Federated Auto Parts - Automotive Aftermarket

Most of the links above have store locators for finding a store in your area.

Head gaskets
upper manifold gasket
lower manifold gasket set.
Exhaust manifold gasket set
Rocker cover gaskets - look for the rubber ones with the steel bushings - Summit has them
Short formed hose between thermostat hosing and intake manifold
6 ft 7/64" or 1/8" vacuum hose
2 ft 1/2" heater hose
1 1/2 ft 5/8" heater hose
Blue Silicone sealer
ARP antiseize or equal for the bolts
ARP thread sealer or Teflon pipe dope for the short bolts.
4 each 3/4" hose clamps (spare item in case the old ones are bad)
4 each 1/2" hose clamps (spare item)

Machine shop charges will vary - figure $275-$350 to have heads checked for cracks, cleaned, surfaced, valves ground, valve guides reconditioned, valve springs checked and bad springs replaced.

i would take em to a shop and have them flow tested before going threw all that work for just a couple cfms increase!

I can vouch for "good ported E7's"

Saleen ported the stock heads and installed SVO 1.72 RR's back in the day for the '89 SSC's. They also ported the stock intake and added a 65mm tb. The SSC's were rated at crank 292hp.
Saleen did a great job on these cars

Mine really runs good. Now I have a Vortech supercharger on it with a Saleen/Vortech intake.

It makes 441rwhp and 414rwtq.

Not too shabby IMO flowing through E7's.

Good Luck

i've paid 50 bones for flow testing.

i'd put on the worked over ones if they check out.

Most of the port work is more inside the head opening up the bowls etc... so looks can be deceiving

Having been down the road of successfully porting my own E7's, my advice is the following:

1. Read the articles on the site diyPorting.com before you start.
2. Port your E7's only if you can't find better heads at reasonable cost. In my case it was the shipping cost ($550 for aluminium heads, $850 for iron) that would have killed me.
3. Don't bother if you have to pay someone else to either port the heads or install them. It's only worthwhile if the entire job is DIY.
4. If you take your time and follow the steps in the aforementioned articles, the results will be very good. I gained ~20cfm intake and ~38cfm exhaust at 0.500" lift on mine. Not bad for 8 hours of work.