Master
Where's the power going
I have question re my defenderwith 4bd1 NA. Max engine revs 3400 vehicle stationary. I can pull max reve in lower gears but in 4th and 5th I cant pull more than arouns 2100 rpm. Hence top speed is not too good. Any suggestions for improvement welcom.
Second question I've used the search engine on here but getting a bit frustrated s there's so much info. Can someone tell me the basic kit I need to turbo the 4BD1 i. E turbo, exhaust manifold what else. I have 12 weeks to prep for a top end trip and would like to improve performace if possible in that time.
Thanks
Swaggie
turbo will fix top end issues. i can see the max fuel governor in top gear easily, . uphill or downhill.....
try winding your fuel screw out a little, about 1 turn. this'll make a n/a engine a bit smokey but will make it climb hills better.
some of the turbo bits req are i think listed in the isuzu part numbers reference in the beginning of the isuzu landie section .
jc
Master
Is the fuel screw the one that governs max throttle cable extension?
Swaggie
no, it is the one on the side of the injector pump that sits against a spring loaded cam.
jc
Master
I think thats the one I mean it lets the throttle open a bit more - or am I confused
Swaggie
the throttle stop screw/s are on top of the pump, the single max fuel screw is on the side.
jc
Master
Ok i'll check on weekend thanks Justin
Check the filter in the bolt that attaches the fule line to the botom of the pump.
Master
Start with the basics air, fuel filters and water traps.
YarnMaster
SubscriberMy accelerator cable was out of adjustment.. when fixed I got 30% more power (back).
Hercules: 1986 110 Isuzu 3.9 (4BD1-T)
Brutus: 1969 109 ExMil 2a FFT (loved and lost)
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