andybp Posted August 22, 2018 Author Share Posted August 22, 2018 7 minutes ago, Jake.Lowther said: May be a stupid suggestion but what about small mini ducted fans with some ducting pipe bringing cold air from outside into the bay, could be discreetly installed wouldn't have to go right to the intake trumpets. Would lower the temps a small amount, anything creating air flow in the bay will bring the air temps down. Like the old BMWs had belt powered cooling fans. already done it, it's a bit of an aluminium ducting and fibreglass bodge right now using a motorbike cooling fan but it makes quite a difference I'll post up a pic tomorrow if I remember Quote Link to comment Share on other sites More sharing options...
Jake.Lowther Posted August 22, 2018 Share Posted August 22, 2018 5 minutes ago, andybp said: already done it, it's a bit of an aluminium ducting and fibreglass bodge right now using a motorbike cooling fan but it makes quite a difference I'll post up a pic tomorrow if I remember Ah fair enough it stopped most of your heating issues then? Quote Link to comment Share on other sites More sharing options...
andybp Posted August 22, 2018 Author Share Posted August 22, 2018 Just now, Jake.Lowther said: Ah fair enough it stopped most of your heating issues then? No but it's getting better Quote Link to comment Share on other sites More sharing options...
Jake.Lowther Posted August 22, 2018 Share Posted August 22, 2018 2 minutes ago, andybp said: No but it's getting better Glad to hear, again maybe be stupid but have you tried heat wrapping the headers and down pipes? Quote Link to comment Share on other sites More sharing options...
andybp Posted August 22, 2018 Author Share Posted August 22, 2018 1 minute ago, Jake.Lowther said: Glad to hear, again maybe be stupid but have you tried heat wrapping the headers and down pipes? have considered it but it'll be a pig of a job with the engine in Quote Link to comment Share on other sites More sharing options...
Jake.Lowther Posted August 22, 2018 Share Posted August 22, 2018 Just now, andybp said: have considered it but it'll be a pig of a job with the engine in Could be worth it in the long run, would have to do some research in heat reduction from the wrap. Also you can get heat resistant/insulating paint which if you put in the side of the block where the exhaust ports are I imagine would make a massive difference to bay temps. Quote Link to comment Share on other sites More sharing options...
andybp Posted August 23, 2018 Author Share Posted August 23, 2018 22 hours ago, Jake.Lowther said: Ah fair enough it stopped most of your heating issues then? picture as promised please bear in mind this is a temporary bodge to try to see what works and it has made a big difference 5-10 Deg 2 Quote Link to comment Share on other sites More sharing options...
Jake.Lowther Posted August 24, 2018 Share Posted August 24, 2018 20 hours ago, andybp said: picture as promised please bear in mind this is a temporary bodge to try to see what works and it has made a big difference 5-10 Deg Not a bad start I'd try something coming from either side where the headlight braces are if you can cram it in lol 1 Quote Link to comment Share on other sites More sharing options...
Daisyduke Posted August 24, 2018 Share Posted August 24, 2018 https://goo.gl/images/sZbH5j hopefully the link works. I was thinking something like this but with ducting from each air inlet. kinda like a plenum on each side with the top cut out. 1 Quote Link to comment Share on other sites More sharing options...
Daisyduke Posted August 27, 2018 Share Posted August 27, 2018 (edited) I have decided for you. Do this https://www.google.com/search?q=itb+plenum&client=ms-android-samsung-gs-rev1&prmd=isnv&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiv7t7_7IbdAhVID8AKHUCKCngQ_AUICSgB&biw=412&bih=670&dpr=2.63#imgrc=YdZZkDLtdrN9GM: Or get something like this https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F263868498704 Cut the end tanks off. Mount them near the trumpets and duct air to it. Edited August 27, 2018 by Daisyduke Quote Link to comment Share on other sites More sharing options...
Bakkums Posted August 27, 2018 Share Posted August 27, 2018 Sasha Anis did this: Cold air intake itb Quote Link to comment Share on other sites More sharing options...
andybp Posted August 27, 2018 Author Share Posted August 27, 2018 9 hours ago, Daisyduke said: I have decided for you. Do this https://www.google.com/search?q=itb+plenum&client=ms-android-samsung-gs-rev1&prmd=isnv&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiv7t7_7IbdAhVID8AKHUCKCngQ_AUICSgB&biw=412&bih=670&dpr=2.63#imgrc=YdZZkDLtdrN9GM: Or get something like this https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F263868498704 Cut the end tanks off. Mount them near the trumpets and duct air to it. 4 hours ago, Bakkums said: Sasha Anis did this: Cold air intake itb the problem with most of your suggestions is that there just isn't the clearance it's hard to show in photo's but it's really tight. just look at the engine bay in sasha's 350 and how much standard stuff is missing and I'm pretty sure his bonnet wasn't standard either but feel free to keep the suggestions coming as I'll be back on it soon, as I have just sorted out the electronics issues I've been having with the airride Quote Link to comment Share on other sites More sharing options...
Daisyduke Posted August 28, 2018 Share Posted August 28, 2018 Looking forward to updates. 1 Quote Link to comment Share on other sites More sharing options...
andybp Posted April 10, 2019 Author Share Posted April 10, 2019 I'm not sure where to start with this so here goes Just as the weathers getting reasonable and I can carry on with this project someone on here (Reeco) decides to sell a set of new Jenvey ITB's at not much more than I paid for my knock off OBX ones so just out of curiosity I had to have them At first glance they are identical but looking closer the Jenvey ones are far superior. The castings are better and of better quality aluminium with no impurities unlike the OBX ones The machining is more accurate, I haven't had to finish tapping holes or countersinking and everything lines up without me re-drilling holes The throttle bodies themselves open and close more smoothly The supplied fuel rails will also fit unlike the OBX ones After the initial fitting issues of the OBX ones were sorted the only thing they still occasionally do wrong is not closing fully causing it to idle a couple of hundred rpm faster than it should; on a track car this wouldn't get noticed on a road car it's a little irritating but not a big deal it's also doing it less with use So without a doubt the Jenvey ones are better but are they worth £1400 more than I paid for the OBX ones an extra £600-700 on a road car I'd say yes but not £1400 but that's just my opinion But now I do have a set of Jenvey ones for near OBX money I'm already preparing to swap them over I've already drilled and tapped the manifolds for the vacuum system and also made some insulating spacers to go between the manifolds and the throttle bodies to help overcome some of the temperature issues with the current setup 2 1 Quote Link to comment Share on other sites More sharing options...
RobPhoboS Posted April 10, 2019 Share Posted April 10, 2019 I have to say I was very tempted in them too, although I know there's just a wee bit of work to get it all singing! 1 Quote Link to comment Share on other sites More sharing options...
Flashback Posted April 10, 2019 Share Posted April 10, 2019 Looking forwards to the next installment! 1 Quote Link to comment Share on other sites More sharing options...
Daisyduke Posted April 11, 2019 Share Posted April 11, 2019 Yay. An update. 1 Quote Link to comment Share on other sites More sharing options...
Keyser Posted April 11, 2019 Share Posted April 11, 2019 Great to see some progress mate 1 Quote Link to comment Share on other sites More sharing options...
reeceybeaney Posted April 11, 2019 Share Posted April 11, 2019 Back at it! Looking forward to seeing the engineering behind it all 1 Quote Link to comment Share on other sites More sharing options...
Kwame Posted April 12, 2019 Share Posted April 12, 2019 On 10/04/2019 at 16:22, andybp said: I'm not sure where to start with this so here goes Just as the weathers getting reasonable and I can carry on with this project someone on here (Reeco) decides to sell a set of new Jenvey ITB's at not much more than I paid for my knock off OBX ones so just out of curiosity I had to have them At first glance they are identical but looking closer the Jenvey ones are far superior. The castings are better and of better quality aluminium with no impurities unlike the OBX ones The machining is more accurate, I haven't had to finish tapping holes or countersinking and everything lines up without me re-drilling holes The throttle bodies themselves open and close more smoothly The supplied fuel rails will also fit unlike the OBX ones After the initial fitting issues of the OBX ones were sorted the only thing they still occasionally do wrong is not closing fully causing it to idle a couple of hundred rpm faster than it should; on a track car this wouldn't get noticed on a road car it's a little irritating but not a big deal it's also doing it less with use So without a doubt the Jenvey ones are better but are they worth £1400 more than I paid for the OBX ones an extra £600-700 on a road car I'd say yes but not £1400 but that's just my opinion But now I do have a set of Jenvey ones for near OBX money I'm already preparing to swap them over I've already drilled and tapped the manifolds for the vacuum system and also made some insulating spacers to go between the manifolds and the throttle bodies to help overcome some of the temperature issues with the current setup I’m sorry if I missed it but what are you using for a cable stay for the throttle cable. Keep up the great work! 1 Quote Link to comment Share on other sites More sharing options...
andybp Posted April 22, 2019 Author Share Posted April 22, 2019 These are the insulating spacers I made to try to help with the heat issues also treated it to new manifold to head gaskets unlike the OBX setup there was no additional work to be done before installation it seems Jenvey know how to drill and tap holes all the way through and countersink as required to the right depth ( OBX take note) here is the manifold installed with vacuum pipework and fittings and this is how it stands now I have had it running but I need to balance the Throttle Bodies and sort out the accelerator cable there were two things I had to do which I wasn't expecting one was shave a bit more off my filler cap nothing major the other I wasn't expecting, the fuel rails didn't fit as per the OBX supplied rails the fuel injectors would have to be 15-20 mm longer was there a VQ fitted with much longer injectors ? I have 3 sets original UK , JAP import and GTR all the same length look at the picture not even close had to cut the mounting brackets to make them fit all ok now and before I go here's a couple of pictures that showcases the difference between the Jenvey and OBX ones 2 Quote Link to comment Share on other sites More sharing options...
Keyser Posted April 23, 2019 Share Posted April 23, 2019 Looking good mate Need a vid when you get them balanced up - should sound lovely when you get it all smoothed out 1 Quote Link to comment Share on other sites More sharing options...
evilscorp Posted April 23, 2019 Share Posted April 23, 2019 I think ID injectors or one brand is longer as the cosworth plenum mention certain injectors are longer (all aftermarket though). Not great when your trying to use oem stuff. 1 Quote Link to comment Share on other sites More sharing options...
bladerider Posted April 23, 2019 Share Posted April 23, 2019 Apologies for such vagueness, Im not fully familiar with 350z yet - just bought one as a track toy. But I bet your fuel rail issues are because they developed the kits on older 60mm Bosch style injectors whereas the ones in your photo's look like the newer, shorter 48mm long ones - perhaps your car is a facelift and thats something thats been overlooked. Apologies again if Im teaching you to suck eggs or barking up the wrong tree, Im new to zeds but not Jap engines lol J. 1 Quote Link to comment Share on other sites More sharing options...
bladerider Posted April 23, 2019 Share Posted April 23, 2019 Just to add, If thats the case then ID or several others make "top hat" adapters to remedy the problem. J. 1 Quote Link to comment Share on other sites More sharing options...
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