20 replies to this topic

[Shooter63]

I wouldn't worry about fitting inserts with the 35.6mm inlet. You'll find every single aftermarket supplier sells heads with a 36-29 valve combination and inserts, it's very rarely a problem. From the flowbench work I've done the big valve head doesn't flow a huge amount more than its smaller valved counterpart, but with a few very simple mods, and without even touching the ports, some impressive gains can be seen.

Phil.

Sorry to revive an old thread but did this get written up re the ‘simple mods ‘ ?
Thanks

Simple mods tend to be 3 angle valve seats, back cut valves where you cut a 30 degree cut on the back of the valve which also reduces the valve seat to a minimum of 60 thou or 1.5mm in new money, also remove the raised edge around the valve seat.

Shooter

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[Davetom]

Thanks 👍

[Turbo Phil]

I covered all these mods in some videos on my YouTube channel.

Phil.

[cooperd70]

Phil. Will I find you easily on YT just by searching for 'Turbo Phil'? Cheers 🙂

I covered all these mods in some videos on my YouTube channel.

Phil.

[Turbo Phil]

Phil. Will I find you easily on YT just by searching for 'Turbo Phil'? Cheers

I covered all these mods in some videos on my YouTube channel.

Phil.

https://youtube.com/...NuDTnDGCa4RxOc1

Phil.

[cooperd70]

Cheers Phil 👍

Phil. Will I find you easily on YT just by searching for 'Turbo Phil'? Cheers

I covered all these mods in some videos on my YouTube channel.

Phil.

https://youtube.com/...NuDTnDGCa4RxOc1

Phil.