Guest mattyh Posted February 11, 2008 I have put the carbs on the engine and connected it up as I thought was correct. Unfortunately I am still not getting any petrol in the engine! Please can someone tell me how I should have them connected. I have attached a photo, its not brilliant but should help show each of the connections. Any tips or help anyone can give me in getting it started will be much appreciated, been struggling with it for a while now! http://img107.mytextgraphics.com/photolava...-49hdxfshj.jpeg (I hope the link works, Im not too hot on these links!) Thanks for looking, I hope you can help! Share this post Link to post Share on other sites
M_R_205 5 1 Cars Posted February 11, 2008 Yea the large brass connector on the bottom is for the fuel, is the fuel pump working? is it wired in properly?? Paul Share this post Link to post Share on other sites
Guest mattyh Posted February 11, 2008 There is fuel getting in to the chambers on the carbs just doesnt seem to be getting into the engine. The two T pieces on the top of the carbs have channels in the castings that go to the chambers. I have connected these to the vacuum pipe on the inlet manifold, but this vacuum is also connected to the timing unit and the brakes! Is it needing more vacuum? The manifold was made by Bogg Brothers with only 1 vacuum pipe. Or do the T pieces need pressure on them to push the fuel out into the carbs? Share this post Link to post Share on other sites
M_R_205 5 1 Cars Posted February 11, 2008 The servo vacuum goes to the take off on the manifold, the two T peices i left blank and didnt use vac advance on the dizzy, All you need conected for the car to start is the fuel at the bottom, Is it running the correct jets? is it definatley sparking? Share this post Link to post Share on other sites
jonand 0 Posted February 11, 2008 There is fuel getting in to the chambers on the carbs just doesnt seem to be getting into the engine.The two T pieces on the top of the carbs have channels in the castings that go to the chambers. I have connected these to the vacuum pipe on the inlet manifold, but this vacuum is also connected to the timing unit and the brakes! Is it needing more vacuum? The manifold was made by Bogg Brothers with only 1 vacuum pipe. Or do the T pieces need pressure on them to push the fuel out into the carbs? My R1 carbs simply have the fuel inlet to bottom connection as shown on your photo (regulated to 3 psi). The top black plastic bits are vented to atmosphere, and the tubes are drainers - not connected to vacuum. I have no induction vacuum connections at all - (servo to vacuum pump). Hope this helps Jon Share this post Link to post Share on other sites
Guest mattyh Posted February 11, 2008 I bought the carbs and engine from someone and it hadnt been used. I was told at the time the carbs were set up to run the engine until it was run in then they would need setting up differently once the engine was run in for more power. I havnt tried it with spark plugs yet as when it is turned over there is no fuel being pushed out the plug holes and they dont smell of fuel either. I have assumed there isnt any fuel in the engine so there wouldnt be any point trying it with plugs yet. My fuel supply is set up to 3 psi. So the top 2 T pieces between the carbs can be left open to air? or blanked off? Share this post Link to post Share on other sites
jonand 0 Posted February 11, 2008 I bought the carbs and engine from someone and it hadnt been used. I was told at the time the carbs were set up to run the engine until it was run in then they would need setting up differently once the engine was run in for more power. I havnt tried it with spark plugs yet as when it is turned over there is no fuel being pushed out the plug holes and they dont smell of fuel either. I have assumed there isnt any fuel in the engine so there wouldnt be any point trying it with plugs yet. My fuel supply is set up to 3 psi. So the top 2 T pieces between the carbs can be left open to air? or blanked off? Open to air (vents) - if you have connected the drains to vacuum that may well account for fuel not sucking into engine as you could have created negative pressure in the float chambers. The main jets should be approx 175 for a 16v and 160sh for a 8v. Share this post Link to post Share on other sites
jonand 0 Posted February 11, 2008 Just re-read your post about plugs. Do you mean that you are not sucking in fuel with the plugs OUT ? - obviously you need the plugs in to create the suction. Share this post Link to post Share on other sites
Guest mattyh Posted February 11, 2008 Thanks for the help guys, much appreciated. I just been thinking about it and feel a bit stupid of trying to suck in fuel with the plugs! So the large two connections at the top of the carbs nearest the inlet manifold are open to air as vents The 2 T pieces on the front are open to air to vent the chambers? How do I check the jets? Thanks again for the help. Share this post Link to post Share on other sites
jonand 0 Posted February 11, 2008 You need to strip the carbs to check the jet sizes - there have been a couple eof good articles posted on the forum - try this link or do some searching on the forum if it doesn't work. http://www.totalvauxhall.co.uk/resources/t...4.tech60697.pdf Share this post Link to post Share on other sites
Guest mattyh Posted February 11, 2008 I'll change the connections tomorrow and try it again with the spark plugs in. Thanks for your help. Share this post Link to post Share on other sites
skanny 0 Posted February 14, 2008 I would bet my left gonad on the fact that your not getting fuel into the cylinder. I built a Carbed R1 lotus seven replica last year and had terrible problems getting it started. My motorbike mechanic friend came round and removed the float bowl covers ( turn the carbs upside down and remove the 3(?) cross head bolts that hold a flatish cover on, be carefull not to loose the rubber seal thats in there) you will probably find the inside is all green and manky - like the side of a fish tank thats in need of a good clean. you will also see the jets in there too. one of the jets will have a slot in it to allow you to unscrew them, do so and then see if you can blow through them. if not pull a wire ot of your wire brush and clamp it in some small mole grips and push it through the jet repeatedly until clear. I did this for all 4 float bowls and it started traight away, while your in there scrape all the green gunk off the cover you removed and the rest of the float bowl. Unfortunately this is what happens when unleaded fuel is left in the carbs for extended periods. if you leaving them unused for anymore than 4 weeks i would recommend you drain the float bowls of fuel to avoid this again. Share this post Link to post Share on other sites
dan1120 0 Posted February 23, 2008 (edited) You sound like you know what your talking about,just in the process of converting to r1 bike carbs 1 thing im stuck on what do i do with the fuel return pipe thats on my car at present?? Edited February 23, 2008 by jackherer Share this post Link to post Share on other sites
jonand 0 Posted February 24, 2008 They dont have a fuel return on R1 carbs afaik. If you read earlier in this thread you will see an article link that you may find helpful !! Share this post Link to post Share on other sites
