Another OHV M90 build

[rocket 5979]

I've been back and fourth with James on the whole datalog thing.
I was getting readings that made no sense.

Even the gauge showing A/F ratio of around 10 no matter what I did with the throttle made no sense.

It turns out I made a wiring error. I wired the gauge to the wrong analog input. I checked my wiring this morning on the way to work, and found the error. Then I get to work, and had an email from James asking me to check which analog input the gauge was on. Im impressed.

Anyway, the gauge now reads an a/f ratio in the low 14's typically. At WOT, I'm at 13.7. I'll get another datalog and send it to James today for review.

I want to make sure I know what I'm doing during the tuning period after the M90 install, as my truck might not even be drivable until I get a new tune. Without correct information to James, there is nothing he can do.

Yeah 13.7 is REAL lean for WOT even on an N/A vehicle. That's strange that your truck is running low 14's at idle unless there have been some airflow/fuel mods done without a tune before. Did you already install your new MAFS and injectors just to get a good new baseline dialed in with the tune?

 

[Dono]

Nope, Ive done nothing.
When James did my tune, there was no data logging done. I'm actually impressed he was as close as he was for just knowing the mods done, and adjusting to that.

I may have caused the lean WOT condition myself. I was trying to make a change in A/F mixture and see it on graphing/gauge. I wasn't seeing a change due to my wiring error.

My current tune is set to WOT one step leaner than what James set in the 87 street tune he provided me. I'll change the tune to the standard settings he provided and hopefully the Wideband Gauge will show the difference at WOT once I select the ricjer setting.

Since the gauge was always showing an A/F of around 10 I was concerned maybe the changes I did to my motor had a negative effect to what was expected, or I had a different problem with my motor.

I'm kinda glad it was just a wiring issue with the gauge.

 

[Dono]

It turns out I need to make a special cable out of a firewire cable. You cant have the SCT Livelink software use a com port for analog input. The SCT X3 had a firewire input for analog. So, Off to the computer store I go tomorrow. For archiving purposes, for anyone else that falls in this trap, here are the pinouts for the SCT X3 to the innovate LC-1.

 

[jd4242]

My gauges have a one wire output for DL

 

[rocket 5979]

It turns out I need to make a special cable out of a firewire cable. You cant have the SCT Livelink software use a com port for analog input. The SCT X3 had a firewire input for analog. So, Off to the computer store I go tomorrow. For archiving purposes, for anyone else that falls in this trap, here are the pinouts for the SCT X3 to the innovate LC-1.

I didn't realize you didn't know the wiring for the analog to X3 stuff or I could have posted that up for you so you weren't wondering what the heck was going on at first. Hell, I even have an extra 6 pin firewire pigtail cable laying around from a previous X3/Livewire analog cable I made.

 

[Dono]

I was banging my head trying to figure out how to make that livelink software see com1. I struggled with thinking it was magic.

Like everything, no magic. Now I know. It was the older versions of livelink that threw me off, since they could select com ports.

 

[ford99_1979]

Not sure if this helps in what you are doing or anyone else for that matter.

 

[Dono]

Yes, that's a great diagram. Shows exactly what needs to be done (I think). I haven't soldered mine in to test yet. Hopefully tonight.

 

[ford99_1979]

I'm a visual guy so I did up the diagram for myself and it worked! haha. This was when I was in the tuning phase with Henson. After about a year while I was still skeptical of how well the tuning worked. So I dropped my front driveshaft and went to a local dyno. He said he wouldn't change a thing Henson did for me.

 

[Dono]

I just tested the cable. Works exactly as it should. one hurdle jumped. on to the next!

Speaking of, I priced out spevtre cold air pipe to get to my maf and it came to over $200 bucks. im not doing that... i need to find a pipe bender that can do 4 inch pipe. There has to be a cheaper way.

 

[jd4242]

I just tested the cable. Works exactly as it should. one hurdle jumped. on to the next!

Speaking of, I priced out spevtre cold air pipe to get to my maf and it came to over $200 bucks. im not doing that... i need to find a pipe bender that can do 4 inch pipe. There has to be a cheaper way.

I dont know why you want that big of pipe.its going to take up the whole compartment and the bend radius is going to be HUGE.especially when your only running a 70mm tb

 

[rocket 5979]

I dont know why you want that big of pipe.its going to take up the whole compartment and the bend radius is going to be HUGE.especially when your only running a 70mm tb

I completely agree. While 4" piping will match your 90mm L-MAFS that you plan to run it will also make it harder to run inside the engine bay. I would neck down a bit to something more manageable and then go the the TB with that. To help put things into a little more perspective a 4" metal intake tube is what I used in the Kenne Bell Explorer and that has a built 4.6 running at 20psi. Running 4" is overkill and then some for your combo.

 

[jd4242]

I completely agree. While 4" piping will match your 90mm L-MAFS that you plan to run it will also make it harder to run inside the engine bay. I would neck down a bit to something more manageable and then go the the TB with that. To help put things into a little more perspective a 4" metal intake tube is what I used in the Kenne Bell Explorer and that has a built 4.6 running at 20psi. Running 4" is overkill and then some for your combo.

yea with the size of tb 70mm(2.75ish) and the short run of pipe he needs i would say a 3" would be PLENTY.i would say 3'' or 3.25'' like me would be ideal.plus it will be hard to find someone that sells or bends 4'' pipe.3'' is dime a dozen or 3.25''.i stepped up to 3.25 and its huge,i couldnt image 4" under there
link to 3.25'' and i have a 15% coupon if you want it,pm me though
http://stores.ebay.com/cxracing/Alu...99786010&_sid=301278660&_trksid=p4634.c0.m322

 

[Dono]

I was thinking about this last night also.
I can go a 4 inch 45 degree elbow from maf to air filter, then on the other side of the maf, I can use a reducer to 3 inches and run 3 inch from maf to throttle body.

Id be able to get a 3 inch, 1 piece pipe bent easily to go from maf to tb.

 

[jd4242]

I was thinking about this last night also.
I can go a 4 inch 45 degree elbow from maf to air filter, then on the other side of the maf, I can use a reducer to 3 inches and run 3 inch from maf to throttle body.

Id be able to get a 3 inch, 1 piece pipe bent easily to go from maf to tb.

Your filter doesnt directly attach to your maf?

 

[Dono]

It does, but its so wide, it will hit the hood, and I can't lower the maf enough. Angling the filter down takes care of the issue. I'll take a closer look at it, but I know my 3" maf and filter I had to angle down.

 

[Dono]

Hey JD, are you using a fuel T for your fuel pressure Guage? I'm trying to find the size I need for the fuel line. I think it's 6-AN (9/16), but can't be sure. I'm just wondering if you have crossed that bridge yet.

Edit..I now have a 12 ton press. $100.00 on sale

 

[jd4242]

Hey JD, are you using a fuel T for your fuel pressure Guage? I'm trying to find the size I need for the fuel line. I think it's 6-AN (9/16), but can't be sure. I'm just wondering if you have crossed that bridge yet.

Edit..I now have a 12 ton press. $100.00 on sale

I have one from one of my NOS kit.i honestly dont know where it is or what size it is,havent gotten to that point yet.it was for a return system though,dont know if they use different sizes. Sounds like your ahead of me12tons right onill be stuck on mocking up the exhaust and welding final fit probably for the next week or so.

 

[Dono]

My exhaust is completely stock. I'll have to tackle that at some point. I'm sure there will be some power to be found there.

I found a solution to the fuel pressure sender. Auto Meter 3280. I just remove the Schrader valve that's on the fuel rail, and install the adapter. I'll order one up tomorrow.

Won't be as easy releving fuel pressure though.

 

[jd4242]

Got a link?