Weve just had a look at some of the power gain or outright power of a couple of cars with GTT heads, and thought we would put them up to see.
-Our (standard SC) 'GTT260' demo car on GTT Stage 2 head (uses stock size valves) ..273bhp (240WHP).
-Tony Fenners car with GTT Stage 3 head ,stock intercooler, 17% pulley .....from memory the head gained 35+ bhp. compared to pre head power runs.
And Finally Alans GP . This went from 211bhp to 252bhp (still std intercooler) with the addition of just GTT Stage 4 head, Shrick cam, and going from 15% pulley to 18%. (also the required GTT fuelling mods ) ...Thats 41 bhp increase.
Although a colder day the Din70020 correction should adjust accordingly therfefore the ambient temp should make no difference to the figures achieved.
Theres one other thing overlooked .....those increases are 'on top' of a GP head!
which already has larger exhaust ports. If the car had been on a standard
MCS head , that increase may well be over 50bhp.
Lees 'GTT300T' with the addition of GTT Stage 4 head and Shrick Cam achieved 391bhp.
Remember this is a customers car, headwork more than any other product can vary . Even with CNC machining theres huge amounts of hand fettling. Heres the proof that our production heads are every bit as good as our 'demo/own car heads.
-CNC Milling is our Forte......thats my original trade.I might do a technical thread on the CNC milling we use on our heads,...theres CNC milling (no big deal tbh) and theres GTT 3D milling (ports ,throats, & valve seats )
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