Fuel/Air Mixture

[Redrover]

Good morning and happy Monday guys.

Over the weekend I tackled the dowel pin fix on my 92 w250. Replaced the gear case gasket, crankshaft seal and serpentine belt. Torqud everything (including the 5 case bolts) down to spec and the old monster's running like a top again! The unfortunate part is...now I'm kinda hooked. I really enjoyed being able to do it all myself, and I'm looking into further "improvements".

My question is this: I'm looking into an ASA modified intake system and a DennyT stage 1 fuel pin. Will these two mods provide me with a good fuel/air ratio? I know more fuel = higher temp, and I'm hoping the ASA intake will get me the air needed to keep the EGT low(er). I've already got a 4" MBRP exhaust system, so I'm sure that will help some.

Or...should I just leave it alone and "don't fix what ain't broken"? I know I'll need pyro/transmission/tach gauges as well if I do these mods.

Thanks in advance guys!

 

[RWherley]

upgrade the turbo first, ether a smaller exhaust snail or a whole new turbo, before the intake, the intake will help a little but it cant make the turbo push more air.

 

[Redrover]

I was looking at a 16cm housing last night. Are there any disadvantages to tossing one of those on there?

 

[Bob Beauchaine]

Gauges should be number one on you list - EGT and boost. Once you have them you can keep tabs on engine performance. Your 4" exhaust takes care of the hot side. Keep in mind a Diesel is basically an air pump - air in (add fuel) air out. I have always felt that a change in one part of the equation you may need a change in another part. The first change I would do - after adding gauges would be to turn up your IP - its free and will help quite a bit. There are how tos' in the tech section.

There a lot of guys running a 16 exhaust housing and they seem to be happy with it's performance. You can only get so much performance with the OEM turbo. There are good turbos out there - I am quite happy with my HX35 but I am sure others will deliver other equally good suggestions.

Bob

 

[Redrover]

Thanks Bob. I already have boost and transmission temp gauges (as well as some Billstein 5100s and a factory service manual ) on the way from Geno's. I've read about fiddling with the pump, turning the pin 90* seems to be the go-to home mod for power...but I read some cautionary tales that make me wonder if it's such a good idea. This is my daily driver, so I can't go TOO crazy!

 

[Simplysmn]

Get a EGT gauge first that way once you start playing with the fuel you can watch what the Motor does you don't want high EGT's

 

[Redrover]

Yeah, I think my next purchases will be a BD 16cm housing and an EGT gauge. Most everything I'm reading says the 16cm is a bolt on, no downpipe mods required, and it'll keep your EGTs decent while towing. Seems like a win win..

 

[RSchwarzli]

First off, welcome to the funny farm.

Secondly, yes. Gauges are for sure #1!

Then, you use the gauges to determine what you need. Pyro too hot? Get a snail or complete turbo. EGTs still fairly cool? Add more fuel!


Lastly, you need to fill out your signature! Depending on year, and mods really determines what mods are better than others! I see your original post says 92 but how stock?

 

[Redrover]

Took care of the signature thingy only mods I have are 4" exhaust and a 90* fuel pin turn.

 

[RSchwarzli]

There we go!!

 

[Redrover]

So far, I'm pretty happy with the 90* pin turn. There's a noticeable difference in power, and if I REALLY try I can get a little bir of smoke (keyword: little. Not a fan of excessive smoke). I use the truck as a daily driver, and plan to hang onto it for as long as I possibly can, so I gotta balance fun and reliability with my mods.

 

[RSchwarzli]

So, you get a pyro yet?

 

[Redrover]

Pyro gauge thingy on it's way next paycheck

Right now I'm trying to decide if the Mag Hytec transmission pan is really worth the money...it'd make installing my trans temp gauge real easy, and increase trans fluid capacity, but I JUST replaced the trans pan.

 

[RSchwarzli]

Personal opinion, my rear diff cover (Mag Hytec) only did about 15 F drop. If I were to do it again, I would likely do a remote cooler. I think that would be better money spent. In the case of your transmission, a aftermarket transmission cooler and pump would likely work better than just a pan. However a pan is easy and a good way to start. All depends on what you want out of the truck. If you are doing lots of towing, that is longer heat buildup vs a stop light run.