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| SPEEDWAY 5 |
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do xr6 heads have bigger ports/valves than standard heads ?
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| TROYMAN |
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yes..
they have slightly larger exhaust valves and stronger valve springs. im not sure about the ports.. |
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| GeZza200 |
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Depends which model but the exhaust ports on an XR head are 41mm and on a standard they are 39mm. The AU heads have 41mm standard.
_________________ EL Futura: CVE head, Wolf V500, ICE Ignition and Coil, 36lb injectors, Walbro 255lb, Paci comps, 3" exhaust, T5, Harrop Truetrac with 3.9s. Now with 198.9rwkw, (~185rwkw and 13.80 @99.1mph) with more power to come |
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| TROYMAN |
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GeZza200 wrote: Depends which model but the exhaust ports on an XR head are 41mm and on a standard they are 39mm. The AU heads have 41mm standard.
you mean the exhaust valves are 41mm..??? the port sizes are different to the valve sizes.. |
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| GeZza200 |
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TROYMAN wrote: GeZza200 wrote: Depends which model but the exhaust ports on an XR head are 41mm and on a standard they are 39mm. The AU heads have 41mm standard. you mean the exhaust valves are 41mm..??? the port sizes are different to the valve sizes.. Yep the valves sorry.
_________________ EL Futura: CVE head, Wolf V500, ICE Ignition and Coil, 36lb injectors, Walbro 255lb, Paci comps, 3" exhaust, T5, Harrop Truetrac with 3.9s. Now with 198.9rwkw, (~185rwkw and 13.80 @99.1mph) with more power to come |
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| craigosmoddedef |
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ring Rob at abbott engines on the Gold Coast. If you need head work done seriously get this bloke to do it too. he has billets of the DEV5 too
_________________ yee - ha |
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