sgtjackass Posted July 28, 2008 Share Posted July 28, 2008 Hey fullaz, got my chevette all sorted, so i thought. Weber was rebuilt and rejetted, most of the ignition system (minus coil and leads) replaced and extractors fitted with 2" exhaust and tuned- 70hp at wheels . Now however, after a few umm high speed runs, i have discovered that if ive been hard on the gas for a while it will suddenly loose all power and will cough and fart for a bit. Im a bit lost, all i can think of is that the float bowl is bein sucked dry. Otherwise it runs mint, and embarresses a few hoodie boys in their civics. Any of u chaps had something similar happen? any help would be appreciated as i cant afford any more dyno time. Cheers Quote Link to comment Share on other sites More sharing options...
MACKAZ Posted July 28, 2008 Share Posted July 28, 2008 Bung on leccy fuel pump ftw..... Quote Link to comment Share on other sites More sharing options...
Unclejake Posted July 28, 2008 Share Posted July 28, 2008 It is quite possible that the fuel pump is not keeping up with the enhanced thirst of the modified engine Quote Link to comment Share on other sites More sharing options...
sgtjackass Posted July 28, 2008 Author Share Posted July 28, 2008 cheers for the replies, yea fuel pumps are pretty poor design and ive got about 10 orso as spares. what would ya recomend? Quote Link to comment Share on other sites More sharing options...
Unclejake Posted July 28, 2008 Share Posted July 28, 2008 I would get two tins and some hose, fill one with fuel and try all your spare pumps on the bench (assumes they are lever activated) and then select the best one, smack it on and see if the problem goes away. Quote Link to comment Share on other sites More sharing options...
Requiemk Posted July 28, 2008 Share Posted July 28, 2008 on this topic. If replacing a mechanical pump with electric do you just block of hole with peice of metal to suit or take arm off mechanical pump. Quote Link to comment Share on other sites More sharing options...
Unclejake Posted July 28, 2008 Share Posted July 28, 2008 ^ I block up the hole with an alloy plate as it is easier to cut than steel (and lighter) Quote Link to comment Share on other sites More sharing options...
Jase Posted July 28, 2008 Share Posted July 28, 2008 look for a facet fuel pump came out on most b1600 utes. they are a squarish shape normally zinc plated, will pump plenty enough for your lil weber dcd Quote Link to comment Share on other sites More sharing options...
mikuni Posted July 28, 2008 Share Posted July 28, 2008 70hp @tw from a 1256 ?!?!? Mean! Quote Link to comment Share on other sites More sharing options...
treggo Posted July 28, 2008 Share Posted July 28, 2008 thats what i thought! Got the sheets? lol Quote Link to comment Share on other sites More sharing options...
Mk1Mad Posted July 28, 2008 Share Posted July 28, 2008 ^ I block up the hole with an alloy plate as it is easier to cut than steel (and lighter) And then he drills some holes in it for super light weight.... Luv ya Jase Quote Link to comment Share on other sites More sharing options...
My name is Russell Posted July 28, 2008 Share Posted July 28, 2008 lighter lighter lighter lighter lighterMahaaaaahaaaaaahaaaaaaaaaaaaaaaaaaaa Quote Link to comment Share on other sites More sharing options...
sgtjackass Posted July 28, 2008 Author Share Posted July 28, 2008 no sheets unfort, dyno was an old style tuning dyno, with just a big dial next to it, dont know how accurate it was . Gotta recomend those guys cause they were awesome and charged reasonably - Engines and tuning ltd, st john street, Tauranga. It goes alryt, im used to modernish fuel injection so its rough as guts to drive, hardly idles and is loud as, vibrates heaps, is a pig to start and has lots of (cam?) lag. real thirsty if i give it shit. it will probly be making less now caus ive backed off the timing so i can run 96 instead of 98 plus octane booster. Im gunna go to pik a part 2day and scope out a electric pump off a carby car. hopefully thatl fix the prob. cheers 4 ur help Quote Link to comment Share on other sites More sharing options...
mikuni Posted July 29, 2008 Share Posted July 29, 2008 Sounds awesome. You'll have to get it to a trackday sometime. Quote Link to comment Share on other sites More sharing options...
Jase Posted July 29, 2008 Share Posted July 29, 2008 haha the joys of a weber and cam would love to see what i didn't buy, would look cool on a set of minilites or globes post some picks up Quote Link to comment Share on other sites More sharing options...
sgtjackass Posted July 29, 2008 Author Share Posted July 29, 2008 yup will do wen i have a spare sec. i need new wheels and tyres 4 it caus i want to increase the rolling diameter as i do alot of highway miles from tauranga to palmy for study. the paint is pretty much f**kd and interior is pretty sad, ive spent lots fixing shitty repairs and dodgy mods so its been abit of a money pit. but almost got all the niggly issues sorted. 100bhp out of a 1256 is possible, but does not make for a nice to drive car, plus you wouldnt want to be be seeing that figure often as by that stage its revving so hard and feels like its going to blow. Quote Link to comment Share on other sites More sharing options...
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