Another OHV M90 build

[Dono]

I stand corrected Phix. Thanks for chiming in.
So the million dollar question is....where is your iat sensor located now?

I changed my plugs to the TR6 iridium. I know they are not as good as copper for power, but last longer. After hitting the 3rd place looking for the copper, I gave up and wen't iridium.

Interestingly, all the iridium plugs were gapped at .04 out of box gap. The good news is that all 6 plugs I removed looked perfect. All 6 cylinders have the same burn. Color looked excellent on them. I had to go thru the wheel well on the passenger side. No hope of going from up top anymore. All the coolant/heater plumbing is in the way now. Only one more scrape on my finger, not bad.

On another note...Ticket #2, almost. Our 19 year old daughter was out in the Explorer tonight and was pulled over by the city police. speeding. They let her off with a warning. This M90 could end up costing us all a bunch of cash.

 

[jd4242]

Did they seem to help any with the detonation?

 

[Dono]

I'll know tomorrow. I changed them anout an hour ago. Its rainy and ****ty here. I'll test and listen for it tomorrow going to work. Your right though JD. All the reading I find on spark plugs say to go a heat range cooler, and narrow the gap.

its def the right thing to do.

 

[jd4242]

I'll know tomorrow. I changed them anout an hour ago. Its rainy and ****ty here. I'll test and listen for it tomorrow going to work. Your right though JD. All the reading I find on spark plugs say to go a heat range cooler, and narrow the gap.

its def the right thing to do.

 

[jd4242]

I'll know tomorrow. I changed them anout an hour ago. Its rainy and ****ty here. I'll test and listen for it tomorrow going to work. Your right though JD. All the reading I find on spark plugs say to go a heat range cooler, and narrow the gap.

its def the right thing to do.

just for a reference,i run the NGK BR7EF.they are a non protruding tip,2 step colder, race plug.they are also the cobras and lightnings plug i believe.(for anyone else that reads this,i run them because of my high compression and plan on running 10lbs of boost and this is a summer truck only)

 

[rocket 5979]

Keep in mind Phix isnt using an M90. Its a ?. Phix?
I remember it is mounted like an alternator would me, with an air inlet, and a presurized oulet. I dont know how much that style of charger heats the air.

Even though it has already been established that phix has an M90 based system, anytime you compress a gas you will heat it as well. Air conditioning systems operate off of the same principles. Regardless of whether he has a roots style positive displacement blower, a centri blower, or a turbo system the IAT sensor still needs to be located after the compressor. The centri blower and turbo will heat the aircharge less than a roots will but they will still heat it nonetheless.

 

[Dono]

Well, I successfully confused the crap out of James with my different emails, and some of my log data didn't make sense to him. This added to the confusion.

He re-sent a WOT tune with transmission locked for tuning, and a drive around tune for logging.

I'm not surprised he's confused. I sent more than one email as I sorted things out. Now that I have that Idle control valve in properly, we can do some re-testing and get some useable numbers.

 

[jd4242]

He will get it all figured out im sure.

 

[jd4242]

Any updates?

 

[Dono]

getting closer. I really kinda made things difficult for James.

1. Getting the idle control valve on properly
2. Installing the crank case vent hose. I thought it was a closed system, and if anything installing the vent hose post maf (like factory) would lean things out a bit as no unmetered air would be entering the system anymore.
3. That dpfe hose popped off again, even with it clamped. James thinks this hose popping off is throwing off the A/F ratio being read by the sensor. I tightened down both ends of the hose as much as I dare, and on todays wot pull the hose stayed put.

James say the whole system lean right out on Friday mornings logs. Its odd, as I installed the crank case breather hose on Saturday.

I'm guessing as to what happened, but those are the only two things i have changed. won't be changing a thing now, other than a cai of some type. I see that changing anything at all really changes the tuning.

Truck pulls strong, I still have a detonation issue. i don't think James will even look at that until the A/F ratio is correct.

 

[jd4242]

getting closer. I really kinda made things difficult for James.

1. Getting the idle control valve on properly
2. Installing the crank case vent hose. I thought it was a closed system, and if anything installing the vent hose post maf (like factory) would lean things out a bit as no unmetered air would be entering the system anymore.
3. That dpfe hose popped off again, even with it clamped. James thinks this hose popping off is throwing off the A/F ratio being read by the sensor. I tightened down both ends of the hose as much as I dare, and on todays wot pull the hose stayed put.

James say the whole system lean right out on Friday mornings logs. Its odd, as I installed the crank case breather hose on Saturday.

I'm guessing as to what happened, but those are the only two things i have changed. won't be changing a thing now, other than a cai of some type. I see that changing anything at all really changes the tuning.

Truck pulls strong, I still have a detonation issue. i don't think James will even look at that until the A/F ratio is correct.

Yea i was telling you having that crank hose off would cause a vac leak(,lean) lean causes detonation so when he gets that solved it will go away.cai will effect tune.sounds like you just about got it down tho.my base tune should be done next week,doesnt mean the truck will be tho,scheduled for dyno tune june 11. Im sure he is going to have fun trying to tune it all in one day!;(im all ready preparing for lower numbers than i dreamed.

 

[Dono]

Yes, the crank vent is the weird thing. Once plumbed it sounds like things leaned out. Somethings screwy there.

It does sound like I have been reporting consistent numbers this week. Its just strange the way things leaned out on Friday. I hadn't done anything. To make things stranger, it sounds like they leaned out between logs. Now, the two logs were done almost back to back without even looking under the hood.

With every tune file, my trucks manners keep getting better and more power showing up.

Whens your M90 getting back? A tracking number?
I can hardly wait to see how much power your putting to the ground.

 

[jd4242]

Yes, the crank vent is the weird thing. Once plumbed it sounds like things leaned out. Somethings screwy there.

It does sound like I have been reporting consistent numbers this week. Its just strange the way things leaned out on Friday. I hadn't done anything. To make things stranger, it sounds like they leaned out between logs. Now, the two logs were done almost back to back without even looking under the hood.

With every tune file, my trucks manners keep getting better and more power showing up.

Whens your M90 getting back? A tracking number?
I can hardly wait to see how much power your putting to the ground.

check my thread and i think its going to be less than i think.remember i have 4x4 with a A4ld auto trans and 36x14.50/steel wheels.from what ive read the first gen with a4lds eat up the most power ever and my tires/ rims way a TON.i would like to see 250ish with 3.25 and pushing 300 with the 2.7,but i think ill see more like 220ish and 260ish.i wanna get it dyno after i go to 5 speed just to see what the power difference is

 

[Dono]

Im sure my detonation has something to do with engine heat.
When the motor is freshly up to temp (coolant) it has very little, or no detonation.
When it has been running for a while, major detonation when under part or full throttle with any load. So, I started with a cai. Have to. As James says, somethings not right.

I spotted a pail in the garage that looked just about right. A few quick cuts, a few holes drilled, some pipe insulation, reflective tape, reflective foam insulation, and I was good to go.

I decided to wrap my 3" pipe with reflective foam insulation and reflective tape just because. The pipe was getting so hot and I already had the materials from a home project years ago.

I think the seal is actually pretty good with the hood closed.

 

[jd4242]

Im sure my detonation has something to do with engine heat.
When the motor is freshly up to temp (coolant) it has very little, or no detonation.
When it has been running for a while, major detonation when under part or full throttle with any load. So, I started with a cai. Have to. As James says, somethings not right.

I spotted a pail in the garage that looked just about right. A few quick cuts, a few holes drilled, some pipe insulation, reflective tape, reflective foam insulation, and I was good to go.

I decided to wrap my 3" pipe with reflective foam insulation and reflective tape just because. The pipe was getting so hot and I already had the materials from a home project years ago.

I think the seal is actually pretty good with the hood closed.

Looks good.what does he think is not right? Heat has ALOT to do with it.you need the gauge i got,its a dual temp gauge.one sensor goes next to the iat and one goes in the tb spacer(thats where i put mine). So you can see what temps the air is before the charger.i think its just your high temps.he still should be able to back the timing out and richen it up tho.he does know you higher than stock compression right? What temp tstat you runing also?

 

[Dono]

James is struggling with how the A/F ratios seem to be changing in the logs. The first log seems to be rich, and the second log is lean. The two logs are done within 1/2 hour of each other.

Ok, James just emailed me. The last set of logs looked much better for him and were consistent. That's a good thing. I have my next set of files to upload (tune with locked torque converter for wot test, and the drive around tune) and do my logging.

Its positive that the logs were consistent of each other. James has something to work with.

 

[Dono]

I think I can pretty much wrap this thread up.
Very drivable, although the wheels chirp if I'm not really careful starting off. Not complaining.

Would like more power, but I have to remember the trucks old. Starting to hear clanking going in to gear. Original U-joints. I'll be able to put my press to use again.

Mileage....We will see. I did lots of wot testing, so mileage isn't showing great, but really not much worse than it was.

The cai...Must have. I was always hearing random popping under the hood after the engine bay was really hot (Even before the M90). I didn't know what it was, and kinda thought it was the air compressor clutch clanking. Now, this doesn't happen. Obviously the air entering the motor was so hot I was getting some fuel igniting way before it should. Now, IAT's stay low at idle and increase at wot, rather than showing high at idle, and going down under wot (Vehicle moving).

I'll find a dyno to post some numbers. I'm betting top end hp numbers are not great. Motor runs super strong, compared to a 4.0 ohv, or a sohc for that matter.

A V8? Tim will be able to make some observations when he gets back and compare it to his v8 sport.

James clearly knows what to look for when tuning. The delays were me ironing out the mechanical side, and not getting him logs he could use.

So, whats next? 5psi boost at wot currently. I wonder what the overdrive pulley would do for boost? 8psi to much? I'm going to have to think about that one.

Just a couple of brackets to make, other than that my truck is a solid daily driver.

 

[jd4242]

Can you hear it inside the cab during wot pulls?lets see some videos if so.great job.whats next,i think i know.exhaust, water meth and the smaller pulley

 

[Dono]

No, the detonation is gone. Before the cai, I was hearing the 'ticking/banging' at idle, stopped and not moving. Was a weird noise. It was the cai that fixed that for sure. The iat's at idle are around 150 now. Before they were really high after being on the highway and coming to a stop. Thats when I'd hear the popping sound.

I'm not sure how to get any vids of the mighty exploder that really show anything. I need to post dyno and 1/4 mile numbers.

Your right though. Exhaust, smaller pulley, and see how that goes. I'm betting you will be right, and I'll have to add water/meth injection to get the temps down.

I just cant stop. What would I do with my spare time?

 

[jd4242]

No, the detonation is gone. Before the cai, I was hearing the 'ticking/banging' at idle, stopped and not moving. Was a weird noise. It was the cai that fixed that for sure. The iat's at idle are around 150 now. Before they were really high after being on the highway and coming to a stop. Thats when I'd hear the popping sound.

I'm not sure how to get any vids of the mighty exploder that really show anything.

Your right though. Exhaust, smaller pulley, and see how that goes. I'm betting you will be right, and I'll have to add water/meth injection to get the temps down.

I just cant stop. What would I do with my spare time?

Not hear the detonation.can you hear the whine in cab? Yea i would for sure do w/m before trying that smaller pulley.nope its never "done"