ok so what will $700 do? - Page 3 - Land Rover Forums : Land Rover and Range Rover Forum
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post #31 of 45 (permalink) Old 07-21-2012, 04:33 PM Thread Starter
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so now i have a few questions. one where is the best place to get an o2 and is there a way to check them to see of that is the problem. and 2 what the heck is going on with the timing? how can you tell if it the vacuum advance is working and how can you distinguish between vacuum and mechanical advance from the timing light?

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post #32 of 45 (permalink) Old 07-21-2012, 10:51 PM
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There is good info on replacement parts as well as parts interchange sources to be found on Range Rover Parts Sources, Land Rover Discovery Parts Sources

Vacuum advance can be tested with a pump or by simply sucking on the hose connected to the diaphragm and noting a change in RPM.

"Your only supposed to blow the BLOODY DOORS OFF" Charlie Croaker. The Italian Job. 1969.

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post #33 of 45 (permalink) Old 07-23-2012, 10:29 AM Thread Starter
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thanks random, there is lots of info in there. i am wondering what the drawbacks could be for the cheaper replacements vs. the ngk's. anyone had any experence with these generic o2's?
Replacement USOS-4000 Oxygen Sensor | Auto Parts Warehouse

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post #34 of 45 (permalink) Old 08-22-2012, 07:30 PM Thread Starter
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ok so i bit the bullet and bought NTK sensors. bought both at 87 each through rock auto. they came today and i just finished installing them. no change in performance. it still ran a 31 sec 0-60. but it felt stronger and there was no misfiring and no other ill effects just a dog. i did notice that it was especially doggy at the low end, like it bogged down right at take off then got stronger at about the 5 sec (10 mph) mark i didnt mark rpm but i could get it easy enough next time i drive it. i then came back to the garage and checked timing. still at 4-5 btdc, so i changed it to 9 btdc and ran it again. 26 seconds. so i am thinking that my timing is not functioning properly. when i suck on the vacuum hose to the dist diaphragm it does nothing to the rpm or sound. when i goose the throttle i can watch the advance go up.

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post #35 of 45 (permalink) Old 08-28-2012, 12:34 PM Thread Starter
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so i checked it yesterday and the rpm boggs down from just off idle to about 1800ish rpm at about 15mph. i jumped the base timing to 12 deg BTDC and noted very little change in the time, so no performance gain. the bogging was about the same too. i am confused about where to go from here and need some help.
i sukked on the vacuum hose with the cap off and the cover off and i can see the timing plate trying to move does that mean it is working or not?

Brian

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post #36 of 45 (permalink) Old 09-23-2012, 05:09 AM Thread Starter
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ok, just to bring everyone up to speed. i replaced the distributor with a new one from D&D (pertronix). the performance gain was significant taking the 0-60 from 26 sec down to 20.5 seconds! so i am pretty happy with that! but it still seems to be missing something. i think that i will turn my attention to fuel next. get a pressure gauge and see what the fuel pressure is at. then maybe look at the bosch mustang injector swap?

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post #37 of 45 (permalink) Old 11-10-2012, 07:42 PM Thread Starter
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just ordered the bosch gen 2 injectors for the swap. i think that i can check the fuel pressure tomorrow and that will hopefully tell me something. i am thinking that i will t into the line downstream of the fuel filter. i checked the vacuum on the fuel pressure regulator and it wasnt leaking but i was un-able to discover anything else. is there a was to check its function?
i also ordered a set of 2781 ome springs since mine are starting to sag in the rear.

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post #38 of 45 (permalink) Old 11-14-2012, 08:04 PM
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I dont know if you have heard of this before, but there is an iphone app called dynolicious that puts out pretty good results as long as you put in all the information about your vehicle. it does 0-60 time and hp/tq. I used it on my past subaru and it seemed to work. Just a thought. I too am looking to increase the performance on my 93 rrc just to try to get it to a more respectable acceleration. Interested to see how things turn out!
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post #39 of 45 (permalink) Old 11-15-2012, 10:28 AM
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Couldn't find that iPhone app and it sounds very interesting.

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post #40 of 45 (permalink) Old 11-15-2012, 12:52 PM Thread Starter
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at lunch today my friend told me to get "adyno" for android (the phone that i have). i will download this when i get home and post up some numbers on what it says and how it compares to my super accurate wristwatch-stare-at-the-speedo method. i am a little excited about the hp and torque numbers also; though i am not holding out much hope for its accuracy!

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post #41 of 45 (permalink) Old 12-04-2012, 07:33 PM Thread Starter
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just an update. i re-baselined the rover last night 0-60 came in at 19 seconds. thats minus 1 from before - yea for cold and dense air! i removed the injectors after that and just finished putting the new ones back in. i will re-run the 0-60 tomorrow night after work. i tried the phone dyno thing to no avail. it needed a specific angle to work and i couldnt hold it in that angle and get it to "calibrate" so i gave up. i will let yu know about the injector upgrade results. here are a few pics
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post #42 of 45 (permalink) Old 12-05-2012, 07:18 PM Thread Starter
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well bummer. only changed the 0-60 by 1 second or so. it is also 20 degrees warmer tonight then it was 2 nights ago. but now it is running 18.5 seconds. i guess i should take what i can get though. it idles smoother but the hot start just a minute ago was pretty rough, so maybe i will dial back the timing advance a little. i am a little stumped at this point. not sure what to try next?

Brian

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post #43 of 45 (permalink) Old 07-01-2013, 06:25 AM Thread Starter
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wanted to give an update. i have installed a 1.250 body lift and 255/85-r16 tires BFG KM2's! New shocks in the front and cleaned up the interior - replaced some patch pannels etc over the winter. trying to get it ready for summer wheeling! i re-baselined the 0-60 which is now a 0-55 indicated due to the tire difference and was glad to see that even with the warm weather ~85 and larger tires it only lost 1 second andis up to 19.5 seconds. i just cut the origional muffler off last night and plan on putting a new Borla muffler in XSPro version? this week. i took decible meter readings at 4 points for the origional muffler and will take the same after i install the new muffler, its a straight through design which will hopefully give a little better flow. i was more worried about the chuncks of the cat that desintigrated being caught in the stock muffler and causing a restriction.
the truck is running great and i am quite pleased with it. if i could pump a few more ponies out of it then i am thinking that i will let it alone - this horsepower bug is a little addictive!!!
oh and i still need to check fuel pressure. ha

Brian

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post #44 of 45 (permalink) Old 07-02-2013, 06:56 AM
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Congrats! glad to see you haven't stopped, and I put the magnaflow on mine and it makes a huge difference as far as making the truck actually sound like it should. I'll have to test my 0-60 time to compare to yours. I am still on the lookout to the best method to get my rrc to a respectable acceleration time, but for now I think I'm just going to enjoy it until I gather the funds to either drop in a turbodiesel and manual transmission.
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post #45 of 45 (permalink) Old 07-08-2013, 09:12 AM Thread Starter
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Let me know what you come up with for 0-60 also. i am at about 5400 ft elevation just for reference. i am very qurious about what yours comes too. i do an out and back mentality to kinda negate elevation and wind changes then average the 2 runs out. i go tthe exhaust in last night; sounds pretty good. its a borla straight through design and it may be a bit loud. but we will see once the rest of the exhaust tubing is on.

Brian

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