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Gripper does not need new shafts, it does however need a conversion ring to be purchased and welded to the original crown wheel if a Gripper crown wheel and pinion are not being used. This extra work can be done by Gripper if you original crown wheel/diff is sent to them. Steve

I understand that the F7R has tagged bearings which should help. Steve

F4R or F7R ? Have you got any maximum and minimum oil pressure data ? Steve

That is the exact problem with upping the spring pressure, the cold oil pressure will be off the dial. As you said it is the poor tolerances with the oil pump which appears to be the problem, something I am trying to address with Porkie's engine. Steve

What pump mod ? Upping the oil pressure will not help. have you ever data logged the oil pressure on your engine ? What other reasons are there for oil surge if the oil is at or abover the correct level mark (which has been check/measured) ? Like I said I am not taking any chances, the sump on...

Correct, a poorly designed oil pump. The low hot oil pressure has always been a problem, the people I have spoken to data logged everything, new crate engines, high and low milage engines all had the same problem. No need to up the spring pressure on the PRV as it will be closed at that pressure...

Hot oil pressure at idle is an issue if it drops to the level I have seen which has been data logged, especially as the oil temperature was not excessive. Steve

I have been given oil pressure data and other information that tells me there is a possible oil surge problem even with the correct and high oil level. The company sorting Porkie's sump had a pattern for a baffle as they supplied an engine building company several years ago. I hope you prove me...

I should have Porkie's sump modified with a baffle ready to fit the engine within the next couple of days. I am also going to modify the oil pump to see if the hot oil pressure at idle can be improved. Steve

I doubt the oil pressure gauge would react quick enough, I see where you are coming from with regards the rally, but it may just be a certain set of circumstances not duplicate from rally to rally even the same rally. The PEC rods I put in Porkie's engine I checked for ovality with the con rod...

What make you believe it was not surge ? The long sweeping bend at nearly full chat, through the artificial chicane then through the second chicane which involved a much harder left the right turn, then back on the power down hill then engine failure. With the oil pressure dropping so low on...

And it is a good idea. A less extreme example of what happens are buffed tyres (worn out !) for dry track, less buffed for a damp track and full tread for wet track. As standard 'control' tyres wear they get faster in the dry slower in the wet. Steve

When you race in a one make championship any advantage is worth while, that is £4k blueprinted engines come from, with dipped lightweight bodyshells, £3k carbon fibre seats, £2.5k T45 cages etc. The problem in policing the car specification. Steve

That is what happens when people want to win and they have the budget. In one of the other tin top series you will find ex-touring car drivers driving a couple of year old touring cars without the sequential gearbox, but with all the trick suspensions and brakes etc. the best way to restrict...

How will the engine power be restricted ? Will there be a minimium weight ? Will there be a restriction on how many tyres for the season ? Can you buff tyres ? What restrictions on the gearbox and gear shift ? If minimium weight can shell be dipped and ballast to weight ? If standard suspension...

Keep the 625 or sell them to me. Steve

What grade are the ARP bolts in the Arrows compared with the PEC, are they the same ? Steve

Ian, Do you have any oil temperature data ? Not quite the same but from what I have been told hot oil pressure can be very low (at idle) after a track day session. Looking at the video possibly oil surge, with the sharp left, then left and then down hill on a trailing throttle (hot oil giving...

As with Porkie's engine first time around swarf everywhere, second time next to nothing in the head. Steve

Formula Ford crossflow engine also show a difference when using a AX block which does not flex. Steve

If the rod is blue it has suffered oil starvation. Steve

Most crankshafts flex when you rev engines,that is one reason for using a steel crankshaft. Four cylinder engines wear/pull the center main bearing, which is why some engines have four bolt main caps. Not the same engine, a Ford 1600 Atlantic BDA engine which produces 230bhp with a thick wall AX...