Slimy38
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| posted on 24/10/23 at 10:53 AM |
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Making bonnet pins IVA friendly
I'm looking at a couple of bonnet pins for my front end. More specifically the back end of my front end (the front is hinged in front of the
radiator). I want to use 'old fashioned' pins rather than aerocatch, mainly for the looks. But I am aware that Mr IVA man would frown upon
the pins.
Is there a way of making regular bonnet pins IVA friendly? I was thinking of some kind of cover but I suspect they'd want to see it being a
permanent thing.
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Slimy38
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| posted on 24/10/23 at 10:57 AM |
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OK, I did a bit more Googling, do the recesses make them IVA friendly?
https://www.carbuilder.com/uk/satin-black-aluminium-recess-mounting-plates-pair-for-sliding-retained-pin-bonnet-pin-kit
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nick205
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| posted on 24/10/23 at 12:48 PM |
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Don't know if the recess would satisfy Mr IVA.
Car Builder Solutions may well know if you give them a call.
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adithorp
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| posted on 24/10/23 at 12:51 PM |
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They'd possibly work and I think are your best bet. Depends if they're deed enough that test ball radius can't reach it.
If it can you could alway try a cover, cut to the same shape. Mounted on one fixing screw but only tightly enough that it could be rotated to reveal
the pin. Maybe with a slot to align it under one of the opposite fixings as a stop?
Could you use flush Deuz fastners and replace after IVA. They might be small enough for the pin fittings to conceal and sign from them.
[Edited on 24-10-2023 by adithorp]
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Slimy38
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| posted on 24/10/23 at 01:09 PM |
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quote:
Originally posted by nick205
Don't know if the recess would satisfy Mr IVA.
Car Builder Solutions may well know if you give them a call.
Good plan, I've pinged them a mail as I'm at work at the moment. I wasn't sure whether they'd be willing to state IVA compliance
in case someone comes back to them after it fails.
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Slimy38
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| posted on 24/10/23 at 01:11 PM |
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quote:
Originally posted by adithorp
They'd possibly work and I think are your best bet. Depends if they're deed enough that test ball radius can't reach it.
If it can you could alway try a cover, cut to the same shape. Mounted on one fixing screw but only tightly enough that it could be rotated to reveal
the pin. Maybe with a slot to align it under one of the opposite fixings as a stop?
Could you use flush Deuz fastners and replace after IVA. They might be small enough for the pin fittings to conceal and sign from them.
[Edited on 24-10-2023 by adithorp]
Aye, I've been looking at Dzus fasteners as well, you do have a good point about being able to replace them afterwards though, thanks. At the
very least the washer for the bonnet pin could be made wide enough to cover whatever mark/hole the Dzus fastener leaves.
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adithorp
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| posted on 24/10/23 at 01:44 PM |
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Of course nothing should ever "fall off" that's been fitted to pass IVA 
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TimC
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| posted on 24/10/23 at 02:03 PM |
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I had the same on my boot - I wanted to keep it trad-looking and not drill too many new holes.
Here's the before....
[Edited on 24/10/23 by TimC]
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nick205
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| posted on 24/10/23 at 02:13 PM |
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quote:
Originally posted by Slimy38
quote:
Originally posted by nick205
Don't know if the recess would satisfy Mr IVA.
Car Builder Solutions may well know if you give them a call.
Good plan, I've pinged them a mail as I'm at work at the moment. I wasn't sure whether they'd be willing to state IVA compliance
in case someone comes back to them after it fails.
Agreed they may not want to give an outright IVA proof rating on them, but they may comment on what past customers have experieneced.
As also suggected, theyre's always the post IVA "fall off/modify" approach.
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Rod Ends
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 posted on 25/10/23 at 11:43 AM |
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Locking Bonnet Pins ?
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Slimy38
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| posted on 26/10/23 at 07:15 AM |
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quote:
Originally posted by Rod Ends
Locking Bonnet Pins ?
I really like those, thank you. Quite simple design, but I think they could look good. My only worry is the lock mechanism itself, they're not
going to survive a British summer let along a British winter.
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HowardB
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| posted on 26/10/23 at 07:39 AM |
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only required to pass the IVA, then you can have anything that you want,,...?
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Slimy38
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| posted on 26/10/23 at 12:52 PM |
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quote:
Originally posted by HowardB
only required to pass the IVA, then you can have anything that you want,,...?
Yep!  To be honest I was thinking coach bolt as the smallest head and a screw body, but then I figured the inspector will want to see under the
bonnet so it still needs to function as a latch. So it's either a sprung Dzus fastener or those locking ones.
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Slimy38
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| posted on 26/10/23 at 02:42 PM |
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quote:
Originally posted by nick205
quote:
Originally posted by Slimy38
quote:
Originally posted by nick205
Don't know if the recess would satisfy Mr IVA.
Car Builder Solutions may well know if you give them a call.
Good plan, I've pinged them a mail as I'm at work at the moment. I wasn't sure whether they'd be willing to state IVA compliance
in case someone comes back to them after it fails.
Agreed they may not want to give an outright IVA proof rating on them, but they may comment on what past customers have experieneced.
As also suggected, theyre's always the post IVA "fall off/modify" approach.
Forgot to say, they responded, and no they won't pass IVA. I expected that sort of statement though.
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Rod Ends
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 posted on 28/10/23 at 01:09 PM |
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quote:
My only worry is the lock mechanism itself, they're not going to survive a British summer let along a British winter.
Cam lock dust covers
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gremlin1234
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| posted on 28/10/23 at 04:36 PM |
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almost all modern production cars use remote release cables
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nick205
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| posted on 30/10/23 at 01:41 PM |
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quote:
Originally posted by Slimy38
quote:
Originally posted by nick205
quote:
Originally posted by Slimy38
quote:
Originally posted by nick205
Don't know if the recess would satisfy Mr IVA.
Car Builder Solutions may well know if you give them a call.
Good plan, I've pinged them a mail as I'm at work at the moment. I wasn't sure whether they'd be willing to state IVA compliance
in case someone comes back to them after it fails.
Agreed they may not want to give an outright IVA proof rating on them, but they may comment on what past customers have experieneced.
As also suggected, theyre's always the post IVA "fall off/modify" approach.
Forgot to say, they responded, and no they won't pass IVA. I expected that sort of statement though.
Fair comment from them (covering themselves). At least you've explored that route.
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coyoteboy
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| posted on 30/10/23 at 04:06 PM |
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quote:
Originally posted by gremlin1234
almost all modern production cars use remote release cables
Must admit I don't really understand why you'd not use hidden remote release cable, I wouldn't want pins sticking out unless there was
a motorsport requirement for them.
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Schrodinger
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| posted on 30/10/23 at 04:10 PM |
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how about an m10 button head socket screw with a large penny washer. this is the same thread as on my aero catches and there is no reason you
can't have screws holding your bonnet on as long as you have an allen key to remove it if asked.
Keith
Aviemore
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padrc66
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| posted on 31/10/23 at 09:27 AM |
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i used these on my bonnet. They're really secure, i've done thousands of miles and they've never come loose. I used aerocatches on the
back but, to be honest, i prefer these and they're easier to use.
https://www.amazon.co.uk/CENPEK-Aluminum-2-44inch-Universal-Release/dp/B09BF8Q2QB/ref=sr_1_10?adgrpid=141711624919&hvadid=628402913267&hv
dev=c&hvlocphy=1007415&hvnetw=g&hvqmt=b&hvrand=520497809195653523&hvtargid=kwd-298477333895&hydadcr=6846_2284398&keywords=
quick+latch+hood+pins&qid=1698743114&sr=8-10
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Slimy38
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| posted on 31/10/23 at 09:56 AM |
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quote:
Originally posted by padrc66
i used these on my bonnet. They're really secure, i've done thousands of miles and they've never come loose. I used aerocatches on the
back but, to be honest, i prefer these and they're easier to use.
https://www.amazon.co.uk/CENPEK-Aluminum-2-44inch-Universal-Release/dp/B09BF8Q2QB/ref=sr_1_10?adgrpid=141711624919&hvadid=628402913267&hv
dev=c&hvlocphy=1007415&hvnetw=g&hvqmt=b&hvrand=520497809195653523&hvtargid=kwd-298477333895&hydadcr=6846_2284398&keywords=
quick+latch+hood+pins&qid=1698743114&sr=8-10
I have seen those, but it then raises the question about quality. Bonnet pins and dzus fasteners are simple mechanisms that even the Chinese
can't mess up. But here it's relying on a mechanism made in whatever sweat shop works out cheapest. I do like them though, I might have to
find some with more reviews.
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Slimy38
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| posted on 31/10/23 at 09:59 AM |
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quote:
Originally posted by coyoteboy
quote:
Originally posted by gremlin1234
almost all modern production cars use remote release cables
Must admit I don't really understand why you'd not use hidden remote release cable, I wouldn't want pins sticking out unless there was
a motorsport requirement for them.
I wasn't convinced a remote release was the way to go. After all, even production cars can get it horrendously wrong. VAG cars for example have a
strangely high number of stretching cables that cause all manner of headaches.
I'm also not convinced about the 'hidden' aspect. Sure, underneath the bonnet they could disappear, but I'd need the handles
mounted somewhere decent. And yes, it would have to be two handles, my bonnet flexes too much to rely on only one catch.
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Partofthechaos
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| posted on 31/10/23 at 12:16 PM |
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I am trying to plan this aspect of my build currently so I am interested in the responses in this thread. I would prefer the cleaner look of no
visible catches, and the standard 4 bonet catches for a se7en type car seems like a faff to me (first world problems). I've mainly been around
VAG cars for the last 20 years or so and I currently have 3 on my driveway. I don't remember ever having an issue with cable stretch, possibly
this is model dependant and I have avoided those models? Not saying that it is not a thing, but it hasn't (yet) put me off using cable releases.
I am thinking either 4 cable release catches going to one handle or 2 location pins at the front with 2 catches at the back. I suspect 2 catches
will be easier to get working and to release so I will probably go with that. Car builder have door catches for cobra style cars which look good. If
it can hold a door it can hold a bonet.
https://www.carbuilder.com/uk/mini-bear-claw-door-latches-pair-75mm
Edit to say I have just found this which looks to solve part of the problem without too much of a faff from a Range Rover bonnet:
 
Range Rover P38 Bonnet Release
Range Rover parts are reliable right?
[Edited on 31/10/23 by Partofthechaos]
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Bluemoon
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| posted on 2/11/23 at 08:46 AM |
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quote:
Originally posted by Schrodinger
how about an m10 button head socket screw with a large penny washer. this is the same thread as on my aero catches and there is no reason you
can't have screws holding your bonnet on as long as you have an allen key to remove it if asked.
This put Alan key on key ring with ignition key…
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Slimy38
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| posted on 2/11/23 at 09:35 AM |
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quote:
Originally posted by Bluemoon
quote:
Originally posted by Schrodinger
how about an m10 button head socket screw with a large penny washer. this is the same thread as on my aero catches and there is no reason you
can't have screws holding your bonnet on as long as you have an allen key to remove it if asked.
This put Alan key on key ring with ignition key…
That's quite an elegant solution to be fair, and most definitely the lowest cost of them all. I did wonder about needing a tool to open the
bonnet, but something on a key ring is just as effective. Thank you both for the suggestion, I think this is the winner.
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