notamondayfan 44 Posted February 24, 2006 hey guys, im converting my 1.9 8v to carbs. i have already got a good set of dellorto 40s (pick em up for free ) i just need everything else. before i start the work, i want to make sure im properly prepared, so i have a list of everything i need (i think) inlet manifold - £103 (from aldonauto.co.uk) fuel pressure regulator and filter - £17.90 (from rallydesign.co.uk) twin linkage - £35.50 (from rallydesign.co.uk) service kit - £8 (from ebay) tuning guide - £16 (from ebay) the only thing im unsure about is chokes and filters. regarding filters, do i use trumpets and then foam socks? if so what size trumpets? ive heard that they can be unreliable and dont filter too well. or do i use a bolt on k+n style filter? do i still use trumpets under these? chokes - the engine is unmodified at the moment. i need the engine running, so i can take it to the local rolling road, and they will set up and jet the carbs there. any other advice would be appreciated thanks, deano! Share this post Link to post Share on other sites
mfield 20 Posted February 24, 2006 Ive used 40's on a mildly tuned 8v before, i was using the std setup for 40's from weber. Calibration Choke 30 Throttle Plate Angle 78 degrees Auxiliary Venturi 4.5 Needle Valve 175 Main Jet 115 Pump Jet 40 Air Corrector Jet 200 Pump Spill 50 Emulsion Tube F11 Float Level 12 mm Idle Jet 45 F9 Starter Jet Fuel 85/F9 Idle Mixture Orifice/Bush 100 Starter Jet Air 150 I know that your using dellorto's but the principle is the same It work well but had limited topend (125). You might want to go for bigger jets and chokes for more speed but you will lose out lower down. When i changed to 45's it was slower from 50-70 in 5th. Do some research on filters because they have different effects, the k&n style can be set for pulse tunning and the piperx ones have direct cold air the choice is your fuel pressure regulator and filter - £17.90 (from rallydesign.co.uk) : will this be able to handle the pressure from your original pump ? if not i would highly reccomend typing carter 4070 into google tuning guide - £16 (from ebay) : id save your money and just do lots of reasearch on the net My single biggest tip for anyone buying carbs is get a synchrometer, it will save so much time and hassle ( and money on the rr ) Share this post Link to post Share on other sites
the_mighty_one 0 Posted February 26, 2006 hey, the regulator and filter you will need, but you cant use the standard 205gti fuel pump, the regulator wont like trying to regulate the pressure from that! you will need a facet silver or red top fuel pump (dont get the solid state gold square pumps as they pack up after a few months - continous fuel drawn with webers unlike SU's / strombergs which they are designed for)!! Share this post Link to post Share on other sites
mbayley77 0 Posted February 28, 2006 Mine has been set up using the standard fuel pump with regulator. Seems to be fine and can hold pressure nicely (have an internal fuel pressure guage). Share this post Link to post Share on other sites
rjw205 8 3 Cars Posted February 28, 2006 It is possible to use the standard fuel pump in the tank. But i have this setup on my car, and run two fuel regulators. Its a bit of a messy setup i suppose, as i have the correct facet red top in the boot, waiting to be plumbed in, with all the filters and piping there. Just haven't got time to plug it all in. The main feed comes from the tank to the first regulater. This regulator is connected to a return fuel line to the tank, so the fuel goes in a continual loop round here... taking a bit of strain off the regulator. this first regulator is connected to the second one which provides a constant feed to the carbs at around 4psi... so as not to blow the float chambers. I dont know what pressure drop the first regulator provides, but as long as the second one does not fluctuate from 4psi.. everything is hunkydory. Rich Share this post Link to post Share on other sites
notamondayfan 44 Posted February 28, 2006 ok thanks guys, sounds like changing the fuel pump is the sensible option. the car currently doesnt have a fuel pump in it, cause it was robbed for my bro's car, so might as well. as for the filter issue, what set up do u find is the best? and have i overlooked anything? cheers, dean Share this post Link to post Share on other sites
mbayley77 0 Posted February 28, 2006 It is possible to use the standard fuel pump in the tank. But i have this setup on my car, and run two fuel regulators. Its a bit of a messy setup i suppose, as i have the correct facet red top in the boot, waiting to be plumbed in, with all the filters and piping there. Just haven't got time to plug it all in. The main feed comes from the tank to the first regulater. This regulator is connected to a return fuel line to the tank, so the fuel goes in a continual loop round here... taking a bit of strain off the regulator. this first regulator is connected to the second one which provides a constant feed to the carbs at around 4psi... so as not to blow the float chambers. I dont know what pressure drop the first regulator provides, but as long as the second one does not fluctuate from 4psi.. everything is hunkydory. Rich The same set up as mine You still need a regulator though with a red top to ensure that there are no surges etc. I would personally recommend one with a bowl on so you can see that the chamber is full and also improves against starvation. Just my opinion though. Dont know how scientific that is. Share this post Link to post Share on other sites
rjw205 8 3 Cars Posted February 28, 2006 True.. something like a Fliter King, and a facet red top seems like a good action on fuelling the carbs. Best of luck with it all Rich Share this post Link to post Share on other sites
205mattgti 0 Posted February 28, 2006 for my twin 45 webber carbs on my 1.9 8v i am using a facet red top fuel pump and a king fuel pressure regulator with the glass bowl on the bottom with the fuel filter on it, and it works well Share this post Link to post Share on other sites
rescue dude 0 Posted March 1, 2006 The best and tidiest way is get a Carter 4070 fuel pump. No need for an endless string of fuel regulators as the Carter will pump enough fuel at the correct pressure. And it cost s about thesame price as a red top. Share this post Link to post Share on other sites
notamondayfan 44 Posted March 2, 2006 so with the Carter 4070 theres no need for a fuel regulator? Share this post Link to post Share on other sites
mfield 20 Posted March 2, 2006 I used the carter 4070 with no reg and had no probs 4psi and 70gph Share this post Link to post Share on other sites
dodsworth_gti 11 Posted March 2, 2006 i aint got a clue about setting them up e.c.t,but i know mine is running on bike carbs with the standard fuel pump running it all,works well!!as for the filter,i and using a ramair Share this post Link to post Share on other sites
Richie-Van-GTi 72 2 Cars Posted March 2, 2006 Ive got a facet silver top box kit for mine with FSE fuel regulator. Any idea how to wire the live on the fuel pump so it shuts down when engine isnt running but ignitiojn is on? Share this post Link to post Share on other sites
rescue dude 0 Posted March 4, 2006 so with the Carter 4070 theres no need for a fuel regulator? No works perfectly. I wired mine straight into the fuse box using the terminal meant for the in-tank pump and it works in the same way as the old pump. i.e. if the engine ain,t turning then neither is the pump. Share this post Link to post Share on other sites
notamondayfan 44 Posted March 7, 2006 so does any 1 know who supplies the carter 4070? ive only been able 2 find an american weber dealer who sells them. cheers Share this post Link to post Share on other sites
pugrallye 0 Posted March 7, 2006 carter 4070 is the danglies, have to import from us though Share this post Link to post Share on other sites
Trick 1 Posted March 10, 2006 ive got a manifold if youre interested Share this post Link to post Share on other sites
