Got BOSCH injectors for my Woo

MMamdouh · Post by **MMamdouh** » Sun Mar 18, 2007 10:47 pm

remeber when i was whining about my leaky injectors and longing for swapping them with BOSCH injectors?
http://www.daewootech.com/forum/viewtopic.php?t=2320

well... i finally got off my lazy ass and bought me a set and finally did the swap

my experience with GM injectors was far from being a pleasure... OEM set developed nast leak at 60k kms then the replacement set (Genuine GM) developed leak problems at 40k kms so it was no good to get another set of them GM injectors.

i have already tried a set of BOSHC injectors that my mechanic had but they were not that great as they were slightly leaking but they were a perfect fit... i just had to find a good, cheap set for my car as i didn't even know from what car he got this set and he was asking too much for them

last Thursday i went to the used car part shops and got myself a set of BOSCH injectors from a '90 BMW 3 series with an M40 1600cc engine... those are a direct swap for our woos and i recon they are the closest match to my car as far as flow rate is concerned... OK they will be a bit higher flow but it is not that big difference. i got this set for half what my mechanic was offering and that is one fifth of the cost of a brand new set of GM injectors so the risk is at its minimum level as far as financial loss goes.

i couldn't wait till i get home so i dived into the engine bay right at the front of the shop and started the swap... had to remove the EGR valve to make some room and it was a bitch to work on a hot engine at a dark street at 9PM but i couldn't just wait... after the work is done, it was time to fire it up.

spooled the fuel pump and prayed to god that it will be a successful job... first crank and the engine started up, idling is smooth, no dark smoke from the exhaust... i even sniffed some of the exhaust and it didn't smell like "raw fuel" as it used to be with the old injectors... now it is time for a test drive

car seemed to be accelerating with no hesitation as it used to do, engine regained some power and it is constantly asking for more... obviously the old injectors were messing up the performance, i could easily confirm that from the feedback i got from the spark plugs... they were always covered by black deposits which indicates too rich mixture.

i was going fast on the way back from the shop to home and the car felt much much responsive... i then turned the engine off and left it for an hour and went back to start it again to check for leaks as this is my main concern... engine started at first crank (touch wood).

next day i got a set of new spark plugs to replace my old, worn spark plugs that were all messed up due to the leaky injectors, performance was even better and the car felt like the old days again... got too excited on the road and went too hard when shifting to 2nd gear while racing a guy in a NISSAN TIDA and probably busted an engine mount

i am now in the phase of checking the fuel consumption so i am going all easy on the driving - no flooring or racing or even going above 90 km/h) to make a valid test for fuel consumption... i recon despite having higher flow injectors my consumption will be better as now i don't depressurize my fuel system each time i turn off the engine plus the fact that the ECU will rectify the injector's pulses to accommodate for the extra flow so it is going to be all good in the end... or at least i hope so.

more feedback on fuel consumption will be posted later.

MMamdouh

Slammed · Post by **Slammed** » Sun Mar 18, 2007 11:14 pm

this is some great news cant wait for the next update

I will be hopefully doing this to my lanos

daewoomofo · Post by **daewoomofo** » Mon Mar 19, 2007 12:16 am

lol i know how that is when you dont want to wait to get home to fix some thing, but nice work on figuring out the match. hope all is good with fuel issues.

MMamdouh · Post by **MMamdouh** » Mon Mar 19, 2007 10:37 pm

thanks for the replys guys

current fuel consumption is 1 liter for 10.4 kms... that will be equavlent to some 24.37 mile per gallon when the car is driven gently, with my pld injectors and heavy foot driving it was some 20 MPG.

i also went and bought myself some nubira calipers (similar to the 1.6 DOHC ones) and a gauge cluster with RPM... gauge didn't work and had to made some extra wiring and ended up with half signal so this will need more work to fix... calipers not yet installed... will keep yuou updated.

MMamdouh

mezomaster · Post by **mezomaster** » Tue Mar 20, 2007 9:19 am

COOL COOL COOL, congratulations man, i am always suffering from my injectors in my 1.6L Nubira too, and i know exactly what is the problem u had is, but im willing to swap a new injectors too but of course not Geniune GM injectors again lol, but i think for me, a lil more fuel flow wont be a big problem for me because of the cold air intake and a custom manifold, by the way, do u have a comparison between Daewoo and BMW 1600, 1800 and 2000 C.C. injectors?? and what u suggest for me???

MMamdouh · Post by **MMamdouh** » Tue Mar 20, 2007 9:59 am

for you i suggest the same injectors as mine... after all it is from a 1600cc engine so it is a perfict fit for you, getting the ones from the 1800cc will not do much difference (better or worse) than the 1600cc so you can try it as well.

i did a little comparison but it was tricky due to the fact that BMW engines that are 2000cc or bigger are 6 cylindersso the injectors flow rate is low.

for example i found out that the injector flow rate of the 1800cc engine is the same as the 2500cc engine simply because the 2500cc engine got 6 cylinders, in that case if you want a BOSCH equavlent for a 2000cc leganza injectors you should go for the ones on the 3500cc BMW engine.

MMamdouh

Spider · Post by **Spider** » Wed Mar 21, 2007 12:37 am

Great !

Now about that motor mount............. ?

MMamdouh · Post by **MMamdouh** » Wed Mar 21, 2007 9:32 am

still not replaced yet... i am going to use my old mount that i filled with silicon, it was the only mount that came out in good shape at the last mount replacment job.

MMamdouh

Daniel · Post by **Daniel** » Wed Mar 21, 2007 11:08 am

MM,
What silicon brand/grade do you intend to use?

Daniel

MMamdouh · Post by **MMamdouh** » Wed Mar 21, 2007 1:10 pm

i have no idea what grade was it... i just went to the hardware store and told the guy to give me silicon, i used two contanes to fill all 3 mounts... this silicon is not as stiff as i wished for but apparently it is doing the jjob.

MMamdouh

Daniel · Post by **Daniel** » Wed Mar 21, 2007 1:23 pm

MMamdouh wrote:i have no idea what grade was it... i just went to the hardware store and told the guy to give me silicon, i used two contanes to fill all 3 mounts... this silicon is not as stiff as i wished for but apparently it is doing the jjob.

MMamdouh

Cool!

Daniel

mezomaster · Post by **mezomaster** » Wed Mar 21, 2007 2:12 pm

by the way, u had installed those BMW injectors with the oil seals and same cables without any extra effort to apply them to your car??? and just making sure, ur sure that the 1800C.C. BMW injectors are exactly the same as the 2500C.C. BMWs but the only difference is in the number of cylinders??

Daniel · Post by **Daniel** » Wed Mar 21, 2007 3:14 pm

MM,

BTW remember that silicone stuff is not compatible with petrol/gasoline/fuel or the like. It can double in volume and become very soft.

Daniel

MMamdouh · Post by **MMamdouh** » Thu Mar 22, 2007 7:24 am

mezomaster wrote:by the way, u had installed those BMW injectors with the oil seals and same cables without any extra effort to apply them to your car??? and just making sure, ur sure that the 1800C.C. BMW injectors are exactly the same as the 2500C.C. BMWs but the only difference is in the number of cylinders??

i had to do no mods whatsoever... i used my OEM injector sockets and the O rings on the BOSCH injectors fits both the intake and fuel rail like a glove and the installation didn't take more than 15 minutes... it is a direct as it can get.

i am 100% sure of the injector flow info... i asked a friend that has a bimmer to ask on the forum he uses and that was their feedback.

also note that a 6 cyl. engine is 1.5 times bigger than a 4 cyl. so simply divide the capacity of a 6 cyl. engine by 1.5 to get its equavlent in 4 cyl. for the purpose of flow rate comparison, this will make the injectors of a 3000cc 6 cyl. equavlent to a 2000cc 4 cyl. (3000/1.5=2000)... the thing is that the injectors used on the BMW 3000 6 cyl. are the same flow as the ones on the 3500 6 cyl. and the 3500 is far more available here than the 3000.

MMamdouh

MMamdouh · Post by **MMamdouh** » Thu Mar 22, 2007 8:23 am

Daniel wrote:MM,

BTW remember that silicone stuff is not compatible with petrol/gasoline/fuel or the like. It can double in volume and become very soft.

Daniel

your concern here is spills of oil/fuel and stuff like that??

well... it is a price i have to pay for exchange of stiffer mounts, no can do at the moment

MMamdouh