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Hi All, Bit of an update on chassis tuning on the M1b replica. To recap, this has basically been a mission to tune out understeer - car data is in the first email of this thread. Over 5 meetings I have gradually improved front end grip, mainly by increasing rear roll couple through a steady...

Hi Kirby, bummer! Sorry to hear that, but glad it died in anger! Only thought I could add to what you've already got listed is valve springs - were they the right spec for that cam (spring rate, coil bind height etc), and/or did you miss a shift and buzz it to the moon at some stage - two...

Hi John, yes it does matter a bit although depending on the application you could render the effect pretty minor or zero. Primaries are usually at the front, and Holley carbs designed to be used in competition usually have fuel control measures designed to combat fuel slosh generated in that...

Hi Dave, just to clarify, simple batch mode needs a distributor on older SBC/SBF engines, but if you run a crank trigger, the distributor has no timing or triggering role in the system - it simply receives HT energy from the coil and dishes it out. The accuracy benefit comes from the use of the...

Hi Dave, can't answer but I do know that moving from batch to sequential on an otherwise identical system in a road car makes a small improvement in low speed light throttle economy and drivability, and that's about it. I used to do this regularly because I had an unreliable cam-sync...

I run Hilborn 8 stack EFI, 2 7/16 bore, on a 440 chev with tilton 3 plate clutch and fairly light flywheel - throttle response is very crisp. Cheers, Andrew

Hi All, did the MG Classic race meeting at Manfeild, Manawatu, New Zealand last weekend. Got a bit rained out on Sunday but weather not bad. Car ran well, and I am now doing mid 10s. The M8F that was running there was doing 8s. Put a new airbox on the car which worked, so I had a lean...

Agree with Chris. My approach below:

Hi Russell, hope Carol's on the mend. I usually have success bleeding masters initially from the pipe union at the master (slacken the tube nut at the master, stroke and hold pedal down, nip up the tube nut, release pedal, wipe up mess, repeat!). Once you get the master moving fluid, move to...

Hi Leon, 565 sounds awesome! 4.6 bore is almost mainstream these days on larger BBC combos so it would basically be rude not to! I have basically done the SBC version of your approach. I am limited to a std deck height and 4.185 x 4 with 6 inch rods is about the practical limit. I needed...

Hi Paul, Given that you have a common plenum to deliver the IAC air into, you've solved the problem. The remote IAC itself can go pretty much anywhere. I imagine a run as long as 1 metre would not have a major effect so you could basically hide it. A small filter should be used so it...

Hi Leon, I have a clear view on that stuff - I call my car a replica whenever I describe it and enter it in anything, and I painted it the colour I wanted (bit too orange as it turns out!). I wouldn't bother one iota what anyone else reckons. Cheers, Andrew

Hi Russell, In the M1b replica I run a cross-flow radiator but like the others have said, I go from a small filler/header tank at the heads to the TOP of one side tank. I pull from the bottom of the other side using a 55gph mezzeire electric pump, then feed that into flanges where the...

Looking great Leon. How have you determined the angle of attack to set the wing at? When I was faffing around with the wing on the M1 I set it at 12 degrees, after a general trawl through the literature (particularly Competition Car Aerodynamics by Simon McBeath) indicated maximum downforce...

Hi Fred, seems like you are really close already. The thing that comes through from several diferent writers is to get it in the right ball park and forget about that last 10-20% of perfection on the basis that the inside wheel is very lightly loaded in turns at speed anyway. I think geometry...

Hi Russell, yeah you are right. I found Allan Staniforth's book "Competition Car Suspension - A Practical Handbook" really useful. There is a whole section on there about ackerman. Two diagrams from that bit is attached: The new bit for me was that the traditional approach of lines...

Hi Fred, I did extensive research and subsequent mods on my car recently due to an ackerman design issue it had. It seemed to me after exhaustive research that the rule of thumb for a typical track to wheelbase ratio is a) for a front rack, a 75 degree included angle between the rack...

Hi All, took part in the Easter meeting at Taupo. Race 3 is online at https://www.youtube.com/watch?v=X-uS8yyNe7I Found the track not ideally suited to the car - pretty tight and winding infield complex that was a bit slow for third and hard to flow nicely in second. Making progress with...

Hi Udo, You may be able to get info and possibly some parts off Richard Taylor at Autotune (Rishton) Ltd: UK Kit Car Manufacturer - kit car manufacturers, mclaren m1 replica, mclaren m6 replica, mclaren m8 replica, historic racing, vintage racing, classic jaguar replicas. They campaign a...

Hi Bill, I did something similar on my hilborn EFI setup. Mounted the water-jet cut bottom plate on a set of stand-off tubes that were a slide fit over the stacks, and secured it by bolting it down on each side with small diameter bolts visible in the photo. Used a rectangular K&N...