Chris and Alana Posted December 14, 2006 Share Posted December 14, 2006 I think im going to go BPU in the next month or two but I was wondering how many of you guys are BPU with the standard jap fuel pump? Quote Link to comment Share on other sites More sharing options...
Jake Posted December 14, 2006 Share Posted December 14, 2006 Quite a few. I was for ages, until I put my car on a dyno and saw how lean it was running. A new Walbro improved things a lot. Quote Link to comment Share on other sites More sharing options...
chilli Posted December 14, 2006 Share Posted December 14, 2006 I wouldn't take the risk personally for the sake of £80-100 but I did run for a few weeks at bpu on the stock pump, but I didn't push it hard much, only to test it made the boost get a pump, it's piece of mind worth having imho Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted December 14, 2006 Share Posted December 14, 2006 Yeah that £100 for a non-popped engine to support an extra 50-75 bhp aint a bad deal. Quote Link to comment Share on other sites More sharing options...
hogmaw Posted December 14, 2006 Share Posted December 14, 2006 I've been BPU for a year with stock pump, running 1.2 bar, with no problems at all! I WILL get round to changing it soon though cos it's better to do so before problems occur than after Quote Link to comment Share on other sites More sharing options...
Chris and Alana Posted December 14, 2006 Author Share Posted December 14, 2006 So is it a better idea to install a walbro first before I change the exhaust and full decat? Will it run fine stock with a walbro or will it run rich? thanks guys Quote Link to comment Share on other sites More sharing options...
hadyn Posted December 14, 2006 Share Posted December 14, 2006 So is it a better idea to install a walbro first before I change the exhaust and full decat? Will it run fine stock with a walbro or will it run rich? thanks guys Yes Quote Link to comment Share on other sites More sharing options...
Jake Posted December 14, 2006 Share Posted December 14, 2006 So is it a better idea to install a walbro first before I change the exhaust and full decat? Will it run fine stock with a walbro or will it run rich? thanks guys Yes Least helpful answer ever? Quote Link to comment Share on other sites More sharing options...
hadyn Posted December 14, 2006 Share Posted December 14, 2006 Least helpful answer ever? It does the job - it was a simple queston and a simple answer! Quote Link to comment Share on other sites More sharing options...
Class One Posted December 14, 2006 Share Posted December 14, 2006 So is it a better idea to install a walbro first before I change the exhaust and full decat? Will it run fine stock with a walbro or will it run rich? thanks guys Yes So how do you figure that one out then? Quote Link to comment Share on other sites More sharing options...
Homer Posted December 14, 2006 Share Posted December 14, 2006 So is it a better idea to install a walbro first before I change the exhaust and full decat? Will it run fine stock with a walbro or will it run rich? thanks guys Yes, you should install the walbro first, it will run fine in stock form. The pump could flow 100x the stock capacity and it wouldn't overfuel. The fuel pressure is controlled by the fuel pressure regulator, not the pump. Quote Link to comment Share on other sites More sharing options...
hadyn Posted December 14, 2006 Share Posted December 14, 2006 So how do you figure that one out then? My point is, just to elaborate that it would be a good idea to put a fresh high flow walbro pump in to replace the tired old stock fuel pump, which may not be as effective as when it left the factory, which in turn runs the risk that you may run lean... As for the issue of whether it runs rich or not with a walbro in, I'd say it does (but thats just a guess... ) Is that OK oh uber- anal pedantic ones? Quote Link to comment Share on other sites More sharing options...
Chris and Alana Posted December 14, 2006 Author Share Posted December 14, 2006 lol, so if it does happen to run rich in stock form will it do any harm until I increase the boost? Quote Link to comment Share on other sites More sharing options...
Mike M Posted December 14, 2006 Share Posted December 14, 2006 So is it a better idea to install a walbro first before I change the exhaust and full decat? Will it run fine stock with a walbro or will it run rich? thanks guys Mines been fine for months now on the walbro. I'm planning on BPU after it's MOT in April so thought doing this and getting a boost gauge too beforehand. Oh and the old pump strainer come out brown along with the old fuel filter. It's good to change that too. Quote Link to comment Share on other sites More sharing options...
hadyn Posted December 14, 2006 Share Posted December 14, 2006 lol, so if it does happen to run rich in stock form will it do any harm until I increase the boost? Shouldnt do no. I dont think you'd run that rich to risk bore wash or anything nasty like that Quote Link to comment Share on other sites More sharing options...
Class One Posted December 14, 2006 Share Posted December 14, 2006 Not being uber pedantic Just making sure that some of our newer members get accurate answers to their questions and giving them reasons why they should do x or y to their car. Quote Link to comment Share on other sites More sharing options...
Chris and Alana Posted December 14, 2006 Author Share Posted December 14, 2006 thanks guys I think Il change it before I decat and put a decent exhaust on then. Is it a simple job or should I really pay someone to do it? Quote Link to comment Share on other sites More sharing options...
Jake Posted December 14, 2006 Share Posted December 14, 2006 Is that OK oh uber- anal pedantic ones? Your answer to a person asking three questions was "Yes" Do you not see the problem there? Quote Link to comment Share on other sites More sharing options...
Chris and Alana Posted December 14, 2006 Author Share Posted December 14, 2006 ok I done a search on how to fit a walbro. Am I right in that you have to cut the wires inside the fuel tank? Is that not dangerous? Quote Link to comment Share on other sites More sharing options...
flukey-lukey Posted December 14, 2006 Share Posted December 14, 2006 You don't actually cut them IN the tank. The whole thing lifts out, then you'll need to cut/solder/heat shrink them back together as the plugs for the standard pump and the walbro are different. I'm no mechanic genious but managed it fine Quote Link to comment Share on other sites More sharing options...
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