Muad'Dib 4.7L stroker build

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SilverXJ
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Re: Muad'Dib 4.7L stroker build

Post by SilverXJ »

No harm done. Its only 10 seconds. Its not like you tried to drive it all day like that.
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Re: Muad'Dib 4.7L stroker build

Post by Mopud »

I've enjoyed reading your build thread mate. Congratulations on getting it going. :cheers:
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Re: Muad'Dib 4.7L stroker build

Post by Muad'Dib »

Just a little update. Ive been driving the Jeep as much as possible and trying my hardest not to let it idle. It has approx 120 miles on it now.

I think the oil pressure has settled in. Its at 50ish cold, and drops down to 21-22 at hot HOT idle. This is running 10w30. At Hot HOT, once i get above 1200 RPM's pressure is 40+.

I got the wideband installed and for the most part everything looks good. It does alot of jumping around sometimes so i just need to learn how to read it properly. It usually stays around 14.7 never really over 15 unless i engine brake (helping to set rings). If it does deviate from 14.7 its dropping to 12.5ish.
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Re: Muad'Dib 4.7L stroker build

Post by Mopud »

What is a wideband? Quick search tells me it's for measuring lambda reading on the sensors. What is it good for?
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Re: Muad'Dib 4.7L stroker build

Post by seanyb505 »

It tells you how much fuel your engine is getting relative to the air it's getting. 14:7 is stoich, that's good for driving along at steady pace. Under full throttle you'll want it to go lower, around 12 or 11 Im not sure that exact number. The increased engine size and injectors of a stroker will mess with the stock computer settings for fuel, so having a gauge will help you get your air to fuel ratio where it needs to be.

Great to hear your oil pressure is good!
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Re: Muad'Dib 4.7L stroker build

Post by Muad'Dib »

I bought a dual gauge pod and i had planned on purchasing a Trans temp gauge to fill the other pod... but now im wondering if thats the best gauge to buy. As in should i go with something else rather than transmission temp or....

Does anyone have any suggestions?
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Re: Muad'Dib 4.7L stroker build

Post by Mopud »

I've heard good reports of the Weathered range of temp gauges http://welltempered.weebly.com/index.html

I have purchased an Engine Watchdog TM2 which has saved me on numerous occasions from cooking my engine. There is a simple mod you can do which adds transmission temperature to its functions as well. I can't find the instructable at the moment but I know it's out there somewhere. http://enginewatchdog.com/
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Re: Muad'Dib 4.7L stroker build

Post by SilverXJ »

Roll your own? You know some programming right?
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Re: Muad'Dib 4.7L stroker build

Post by Muad'Dib »

Yeah.. but probably not enough to write something quickly within this application.. Would probably take me a decent amount of time.

Im thinking im just going to go ahead and put an a Trans Temp gauge in the currently empty pod. I cant think of what else could be better to monitor.

Its completely normal to run rich on a cold start right? This morning i started her up and she was at 12-12.5 and stayed that way until i got to work. The temps were still below 210 (My Jeep has always taken forever to warm up).
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Re: Muad'Dib 4.7L stroker build

Post by SilverXJ »

Assuming that the drive to work is longer that 30 seconds that isn't correct. While it may run rich for the first few seconds it should go to 14.7:1 after that or close to. However, that is on an OBD II system. Don't know how that would differ on a Renix system.
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Re: Muad'Dib 4.7L stroker build

Post by Muad'Dib »

Well i dont live far from work... i could walk.. but i did sit in it for about 2-3 minutes to warm it up. Then took off to work.

If it continues to run Rich what can i do to alleviate this? Consider slightly smaller injectors? Adjustable MAP to give it less fuel? I was afraid i was going to be lean but that definetly hasnt been the case.


Only other issue so far is the starter. Sometimes it just clicks like its going to start and doesnt. If i hold the key there then she will start... probably just the extra load on my old old OLD starter. Needs replaced im sure of it.
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Re: Muad'Dib 4.7L stroker build

Post by SilverXJ »

What is the flow rate of the injectors you are currently running?

I would drive it longer and see what the AFR does. I am not familiar with the Renix system so I don't know what its warm up times are.
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Re: Muad'Dib 4.7L stroker build

Post by Muad'Dib »

The first post has all my parts etc ;)

I have Accell 150826 = 26 lb/h @ 43.5 psi.

Will flow around 24.6 lb/h on my 39psi rail....

I dont know if its renix in general, but i know my Jeep has always taken a LONG time to get warmed up.
If it feels right, then STROKE it!
You're lucky that hundred shot of CAPS LOCK didn't blow the welds on the forum!!
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Re: Muad'Dib 4.7L stroker build

Post by SilverXJ »

I'm not talking about the time it takes to bring the coolant to temp by the gauge on the dash (water temp), but rather the time/conditions the PCM needs to bring it to 14.7 closed loop operation.
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Muad'Dib
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Re: Muad'Dib 4.7L stroker build

Post by Muad'Dib »

Ahh .. for some reason i was thinking they go hand in hand.
If it feels right, then STROKE it!
You're lucky that hundred shot of CAPS LOCK didn't blow the welds on the forum!!
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