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Hi, Just building a high spec n/a F4R 172 engine for sprint competition use. In then past I have followed the school of thought of using race standard big end bearings and Renault OEM tanged main bearings which have always been fine with no issues arising. Race mains give a bigger crank to...

Hi, Does anyone have any details of a sump baffle plate for the 172 motor - before I go reinventing the wheel. I have searched previous posts but unfortunately can't seem to find any details. Cheers

Hi, Does anyone have any details of a sump baffle plate for the 172 motor - before I go reinventing the wheel. I have searched previous posts but unfortunately can't seem to find any details. It's for comp car BTW. Cheers

Just building up a Ph2 172 engine for sprint / hillclimb use only and my query is regarding cam choice. Whilst I appreciate that max bhp figures are nice, they are not in themselves the be all and end all, so looking for a cam which does not lose out on the low down torque side of things, plus...

Hi, Anyone got a 172 Cup ph2 inlet manifold gasket to hand, I am looking for the cross sectional area of the inlet port, anyone know offhand or just measure the dimensions for me and I will calculate. Cheers and Merry Xmas, Colin

Does anyone know when the CatCams 423 cam is used with Wossner high comp pistons, do the piston valve cut outs require deepening and more importantly is their enough meat on the crown to accomodate. I will of course do a dry build first to assess any clearance issues but just wondering if...

Looking to move up sprint class next year from SB to 1b, where you can fit throttle bodies. You are not allowed to modify the slam panel I am advised in fitting them. As they are an expensive piece of kit my question is what throttle bodies will fit without having to modify any under bonnet...

Can a lowered Clio Cup run 8 inch rims without any mods to the wheel arches/bodywork

Hi, Can you fit 25mm wider rims on Clio Cup Ph2 without any other mods which may be required to avoid rubbing. Colin

Hi, I have been looking at the claimed increases in bhp from “ matching inlets” on a Clio Cup 172 of some 10bhp. Looking at the “minor” mismatch between gasket and inlet manifold this seems a large increase in power for such a small port blending exercise. Is this 10bhp increase just...

Hi Newbie here first post question. I understand that a 182 exhaust is supposed to be a 4-2-1 manifold while the 172 is a 4-1. My query is I have been looking at "genuine taken off a 182" manifolds which appear to be exactly the same to look at as ones advertised as from a 172. Does the...