T-Man’s Precision Exhaust Port Welding

At T-Man Performance, we have developed a more consistent exhaust port by welding our ports rather than using larger valves and reshaping an existing port. Our Precision Port Welding process yields a stable and consistent ported head time after time; one that allows for proper air flow and port velocity.

Poor Quality

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Seat Out

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Notice the difference in the inconsistency of the Seat Base width – the undercutting behind the valve guide versus the rest of the bowl. This is a very important area for consistency of flow from head to head.

The three most important areas:

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The Welding Process

1. Prepare Head. Cleaned and readied for grinding.

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2. Prepare for welding. Heads are preheated.

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3. Welding process begins.

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4. Weld backside of bowl.

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5. Weld short bend and cross section.

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6. Heads are cooled down and readied for CNC porting.

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7. During welding, porosity areas are not skipped over. We regrind the bad areas out and weld again, if required. Each job is unique.

T-Man Performance offers a wide variety of port welding for other style castings not shown in the images above.

T-Man Performance is not responsible for the replacement of castings or any additional cost. If any problematic areas are noticed before welding, T-Man Performance will contact the customer to discuss options before continuing with their order. Since our welding process has begun, we’ve had 3 heads crack beyond repair due to bad castings.

   

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T-Man Performance offers high performance cams, heads, cylinders, kits and dyno tuning.

All machine work is done in-house on a five axis machine center.

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