Photos
| Typical intake port from a MHS Stage 1 head as delivered. White grease is lithium for the valve stem. This is how your heads will appear when you unpack them. |
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| Typical exhaust port from a MHS Stage 1 as delivered. |
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| Picture showing bowls and chambers before assembly of a Stage 2 PI head. We do not modify the chambers for StockMod, Stage 1, or Stage 2 PI heads. |
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| Another shot of the chamber side just before surfacing. |
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| Stage 2 PI chamber with 0.5mm oversized aftermarket valves. |
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| Stage 3 PI chamber |
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| Stage 3 PI chamber coated in
ceramic by
Swaintech. You can have this done
to both heads for $500 extra if
desired. Also you can click this picture for a larger close up version. |
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| Head on the CBN Rottler surfacer. |
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| Tool for quality control on the valve stem height. There is a 0.030" range we found the stock heads to have that we stay inside of. |
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| Tool used for compressing and installing valve springs. |
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| Assembly room. |
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| Lots of heads to assemble. |
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| Measuring tool showing the height of a stock PI intake port. |
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| Same measuring tool with same height showing how far the roof is raised in the PI intake. This is right under the lash adjuster where an extra 1/4" of aluminum was left in the casting in case of core shift. |
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| Head with a spark plug insert. |
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| Head with Timesert spark plug inserts that went lean with a bunch of boost. You can see more details here. |
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| Close up of the damaged chamber. The Timeserts stayed in place while everything else was melting away............. |
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| Cutaway of a PI head down the middle of the exhaust port, the large tube to the right is the hole for the spark plug. Here you can see how the valve-train is set up in the modular heads. You can click on this one to see it up close. |
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| Casting flaw that we did not catch until halfway through the port work. |
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| Port too far and this is the
result.
This is now the door stop at the shop............. |
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| Bender - this is a stock intake valve from a 3V that decided to leave the head. |
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| Bent valve topside, the bent one is on the far right. If you hammer and/or pry the rockers in and/or the rocker comes off during use this can happen. The head will need to be removed to replace the valve. You can click this picture to see it up close. |
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| Brand new Stage 3 PI head with a broken Manley valve. The pistons were installed backwards putting the valve relief notches in the wrong place. Intake valve piston notches for a 2V motor need to be on the outside of the block which is opposite of most every other motor. Sadly I see this about 3 times a year so hopefully this picture will prevent others from doing the same. You can click this picture to see it up close. |
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| 4B head that had too much timing under boost. They eat away at the gasket edge next to the intake valves. |
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| Same 4V head, we have cut out the area to weld and repair it. |
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| Same 4V head welded, surfaced, and ready for boost once again. |
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| Common problem with the 03 and newer 4V heads that are under a lot of boost. The seats get overheated and will loosen from the heads. Here you can see there is a gap between the seat and head. You can click on this video link to watch this seat break lose and spin in the head when we tried to give it a valve job. You can also click on the picture to see this up close and detailed. |
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| On the 2V heads they will rot right where the intake gaskets seal to the head causing leaks. |
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| Here we have ground away the rotted areas in preparation to weld it back to new. We do this to about 25% of the PI heads that come through here, it is a very common problem. |
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| Ported plastic PI intake manifold. Most important area to tweek in is the bulge around the fuel injector. Do not do this with a stock PI head as they have a corresponding bulge in the intake runner to match. Most ported PI heads and all stock NPI heads do not have this bulge and would help some from this intake mod. The flow at the roof of the port is always the highest in the port. |
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| Ported Edelbrock runner exit. What you want to do is to raise the roof and teardrop the trailing edge of the fuel injector hump. |
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| Cooling mod for the Edelbrock 2V intake. You have to grind away the reinforcement bar before you can drill and tap the hole. |
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| Scratched up cam journal, we can polish this back out without a problem. |
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| Pair of 2V cams a customer had balanced for a high RPM race motor. Weight was removed at the front and rear in the pictures to the right and below. A very expensive job that I would only consider if 8000+ RPM are in your plans. |
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| Weight that was removed at rear lobes of cams. |
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| Picture of a stock crank gear on the left and a modified crank gear to allow a Coyote crank in a modular block on the right. If you have a Coyote crank and this gear you cannot run the adjustable crank gears and will have to run adjustable cam gears which are about 8X more expensive. |
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| 3V Stage 1 chamber showing the tapered guides and bowl work. |
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| 3V intake port, you can click this picture to see a larger version up close. |
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| 3V intake port side view, you can click this picture to see a larger version up close. |
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| 3V intake port side view, you can click this picture to see a larger version up close. |
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| 3V exhaust port. |
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| 3V head at final assembly. |
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| Please never send us your cores packed like this................ |
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| This is the worse core shift we have seen on a 4V head. |
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| Yes we can repair this too. |
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| Stage 1 4V B head intake bowl. |
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| Stage 1 4V B head chamber side. |
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| Stage 1 4V B head intake port side. We only work the bowl region for the Stage 1 4V heads. |
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| Stage 1 4V B head exhaust port side. We only work the bowl region for the Stage 1 4V heads. |
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| Stock 99-01 4.6 C head intake bowls. |
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| Stock 4V intake bowl showing how stock guides are sized poorly. The stock guides are too short and allow a lip in the bowl at the worse possible location for flow. |
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| Installation of custom longer bronze guides. |
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| Another photo of the stock port. |
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| Final port photo with longer guides blended into roof of port. Not only does the valve have more support we fix the lip issue as well. |
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| 4V exhaust port before. |
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| 4V exhaust port after. |
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| Finished product before valve job. |
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| Stock Navigator intake bowl |
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| Ported Navigator intake bowl |
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| Stock Navigator intake |
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| Ported raised roof Navigator intake |
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| Stock Navigator exhaust |
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| Race ported Navigator exhaust |
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| NPI Stage 2 chamber You can click the picture to see it up close and detailed. |
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| Stock NPI intake port |
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| Ported NPI intake port |
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| Stock NPI intake bowl |
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| Ported NPI intake bowl |
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| Stock NPI exhaust port |
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| Ported NPI exhaust port |
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| Stock NPI exhaust bowl |
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| Ported NPI exhaust bowl |
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| TFS Combustion Chamber |
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| TFS Intake port |
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| TFS intake bowl showing super large short side radius and height |
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| TFS exhaust port |
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| TFS valvetrain showing reversed valve and lifter location for the intake. |
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