Doof

Cheers Andy I wondered about flywheel (as I have changed it to the lightened kit from GBS), however, Troy at Northampton Motorsport said he would have also expected to experience issues with the clutch if this was the case, yet that all behaved fine. Regards Geoff

Cheers Andi Yes, wheel get wheels/tyres checked first as most of you have suggested including Troy at Northampton Motorsport, however, he qualified this by saying in his experience of many 100's of tests, he did feel it was likely to be conflicting gearbox/prop/diff planes/angles that were likely to be causing it! Regards Geoff

Hi Leslie Speed rather than RPM so mid to top end in fourth upwards (probably 90mph+ The engine if off-centre by 5mm. Regards Geoff

Many thanks Alan I had planned a nut and bolt check, with the car having now covered just over 100 miles, but will also work through the other checks you have suggested (not sure how easy it will be to get the prop out - MT75). Fingers crossed something will reveal itself via a process of elimination! Kind regards Geoff

I have had my GBS Zero (Ford) dyno tuned by Northampton Motorsport today and they alerted me to a bad vibration in the car which may point to drive train issues - possible gearbox/prop/diff/drive shafts alignment or balance problems. Apparently, it behaved pretty badly at the top end (clearly, speeds greater than I have taken it on the road thus far since my late Nov. 2020 IVA pass and thanks to Covid, weather etc.) Has anyone any experience at where I might start my investigation first? I know my engine is a few mm off centre in the chassis (checked this out with GBS during the build) and I feeI I have been really spot on with everything, believing (perhaps naively), that the prop shaft Universal Joints would deal with minor angle/phasing differences between the gearbox and the diff. Would appreciate any wisdom please as I am just feeling a little frustrated when my hopes were that I could finally get to drive the flipping thing rather than have to take it all apart again!!! Thanks in advance.

Many thanks. I have managed to get it fitted (probably temporarily) with an extra exhaust flange and extra gasket between the manifold and the engine.

Many thanks for replying

I thought this might be part of the problem but having put a spirit level across the bottom of the raceline sump it is pretty level with there only being 1mm difference on my vernier (between the level and the chassis) from the left side to the right side.

Another quick question - can the rear diffuser be fitted to the car for the IVA test?

Hmmm - mine just wont fit even when I rotate the silencer to the optimum position. I just can't see why just being a few mm off centre that this should throw out my silencer position by that much! If you are achieving 10mm then I would have thought I would get a gap of 5/6mm yet I can't even slide the two bits together because it is so hard against the body!!

Many thanks for confirming.

I did speak with them and this same point was raised - everything checks out but I couldn't really obtain any points of reference i.e. the 'normal' gap between the manifold and the bodywork and/or the 'normal' gap between the silencer and the bodywork! The conversation kept reverting to my engine being a few mm off centre. Are you able to confirm the approx. gaps I should be getting?

Another quick question, having run my engine for the first time just a couple of hours ago - which was a BIG moment and all seemed okay, apart from it being a bit noisy due to manifold/silencer issues. My fan is front mounted to the radiator and it seems to be 'pulling' air from the engine out towards the grille when my feeling is it should be doing the opposite! Could anyone online please confirm. Thanks in advance

Sorry to be a pain but I have faced more challenges today ahead of (trying) to get my car ready for IVA in just over a week! Can anyone confirm how close the silencer sits to the side of the bodywork? I am currently unable to fit mine onto the manifold (done up tight to the engine) because it is touching the bodywork to the point that the two bits cannot be aligned. I know my engine is sitting a few mm off centre to the chassis but it surely cannot be that close. Thanks in advance of anyone's thoughts/comments.

Many thanks for responding. I will have to decide on my best option based on the various suggestions offered.

Yep, will do. Many thanks

Thanks for replying - I believe you are right and I should have gone for the one without cap. Problem is, I am now committed as it is bought and fitted and I was just hoping someone else may have gone this route and could therefore possibly confirm if both caps were the same psi rating that I would get away with it! What I don't know is, if the radiator can take greater than 10psi as that is the cap it was supplied with? - probably best if I go for both at 10psi rather that both at 20psi, although this won't necessarily be helpful to me on overall cooling. The GBS/Kit Spares equivalent radiator (with cap) comes with a 13psi one fitted!

Another query I have as I try to get ready for my IVA. My radiator cap is rated 10psi and the one supplied by GBS on the new thermostat housing is rated 20psi. Presumably, the system will only work correctly if these are rated the same - my question being, which one would I be best advised to change? I would appreciate anyone's thoughts/comments before I order one. Thanks in advance.

It seemed logical to me but not being a mechanic (like most of you other guys) I thought I must be missing something!! Many thanks for replying.

I am trying to finish off my GBS Zero (Ford Zetec) build which goes for IVA in a couple of weeks time. A quick question about fitting the throttle cable as I have read a number of blogs on the subject which show bits being cut off etc etc. I have the GBS plenum fitted with standard Ford throttle body and my feeling, having worked on this today, is it seems to work best fitted as per my attached picture i.e I get full throttle movement and adjustment! My worry is, I can't seem to find any reference to anyone else fitting it like this (upside down on the bracket to all the pictures I can find). Am I missing something? Would appreciate any thoughts/comments from anyone who is currently online. Many thanks

Hi All Sorry, have been away on business so not logged in to read your replies. The kit has now sold . Thanks for your support.

GBS Zero Starter kit plus some other items for sale if anyone is looking to start a build (Chassis just updated by GBS to Mk4 with lowered floor, crescents, radiator brackets etc. and re-powder coated plus all other black parts re-powder coated) >Other items:- > Drive Shafts & Hub Carriers > Front Hubs > GAZ Shock Absorbers > Steering Rack > Steering Column > Track Rod Ends > Steering Wheel > Fuel Tank (just fitted with new boss) *Note - I also have a rebuilt diff and wheels/tyres. Open to offers depending on how many items you may be interested in. If anyone would like to take a look or has any questions please contact me during daytime hours - 09.00hrs to 18.00hrs Doof - 07810 551162

The price would obviously depend on how many of the items the ultimate buyer actually wants and I can be a bit flexible on this but north of £3K is what I'm thinking.

I Have a GBS Zero Starter kit plus some other items for sale if anyone is looking to start a build (Chassis just updated by GBS to Mk4 with lowered floor, crescents, radiator brackets etc. and re-powder coated plus all other black parts re-powder coated - excludes GRP nose cone) >Other items:- > Drive Shafts & Hub Carriers > Front Hubs > GAZ Shock Absorbers > Steering Rack > Steering Column > Track Rod Ends > Steering Wheel > Fuel Tank (just fitted with new boss) *Note - Probably will also include a rebuilt diff, recon prop shaft and new wheels/tyres. It is a 2009 kit that was not started and I was updating it ready to put some time/effort into this, however, I am now going to build one that has been started by someone else (100+ hrs in) so that I can try to fulfil my aim to be on the road next summer! Happy to answer any questions during daytime hours - 09.00hrs to 18.00hrs Geoff - 07810 551162