Tuning Issue--look inside

[CDW6212R]

A gear drive instead of a timing chain can possibly trip knock sensors.

 

[rocket 5979]

A gear drive instead of a timing chain can possibly trip knock sensors.

Yep. And I was being a smartass by saying "If you want" as it is not a really necessary mod for an Explorer; even a modified one.

 

[CDW6212R]

Ditto, high dollar and no big improvement. I think that the noise is the real draw to them.

 

[Jakee]

hmmm, interesting.

 

[CDW6212R]

Uh oh, there goes $450, LOL.

 

[rocket 5979]

Uh oh, there goes $450, LOL.

I doubt it. Gear drives and OHC engines do not mix.

 

[CDW6212R]

Your right, the thought came to me quick. I have friend's who buy different mufflers and air cleaners for their cars like yearly accessories, impulse buying.

What they need to do is push the development of the Cosworth 2.9 DOHC heads for the 4.0 OHV engine. There may be one finished in Europe, a thread was on here a while back. That could be nice, with a good transmission.

 

[Jakee]

Nope, my days of doing A BUNCH of work for a small gain are almost over. I won't mess with my knock sensor.

 

[Xan]

Ditto, high dollar and no big improvement. I think that the noise is the real draw to them.

They are a good insurance for huge cam build and heavy psi forced induction, but they are a PITA to line up compared to a timing chain (i have one in my garage for a SBC) but you're right most people buy them cause they make a annoying whiney noise. Oh btw you can ussauly pick loud or quiet gear drives haha

 

[CDW6212R]

Yes, I know about that, "...Oh btw you can ussauly pick loud or quiet gear drives haha" from way back. Mustang guys were picking the loud set to be sure that people knew that they had the gears.

 

[rocket 5979]

They are a good insurance for huge cam build and heavy psi forced induction

....which not but a few with an X would ever do......

 

[jah81592]

A gear drive instead of a timing chain can possibly trip knock sensors.

Don, You always bring interesting information and debate to the table. I haven't even ever thought of this. I would definately be interested to datalog an engine with a gear drive to see if it does irritate the sensor. If it does you have one or even two options in the tuning. First is to "numb" the knock sensor thus effectively desensitizing it. Or turn it off completely. My wheel is definately sqeeking now!

 

[rocket 5979]

Don, You always bring interesting information and debate to the table. I haven't even ever thought of this. I would definately be interested to datalog an engine with a gear drive to see if it does irritate the sensor. If it does you have one or even two options in the tuning. First is to "numb" the knock sensor thus effectively desensitizing it. Or turn it off completely. My wheel is definately sqeeking now!

It is the same concept with the noisy PD blowers as well. Though there are some used in stock applications with knock sensors on the vehicle I would imagine there has been some tweaking to eliminate tripping the sensor in the particular frequency range of the blower. Of course allot of blowers aren't using straight cut gears like allot of gear drives do. The use of non-helical gears will exponentially add to engine noise.

 

[Turdle]

Wow--
ok you guys--the ride was fun--

this plane is now bound for " Eric's Mounty 0-20 mph dead zone fix"


Remember? This is about a Mounty that seems to stumble a bit until 20mph-then it is like a nitrous switch is pushed, and the thing shoots-
It is a very distinct transition. I have felt it--there is something amiss, as mine doesn't-nor ever did, do this--
I really do believe it is a low vacuum issue-I'd really like to see Eric switch back to his stock intake breather just for giggles.

 

[CDW6212R]

Ditto, this got my attention to start with because the Mark VII's with the identical HO 302 is far slower than the HO Mustangs. The 0-20mph times are 95% of that. It's all about the lower rpm's, with the Lincolns I always thought that it was the torque converter.

 

[techieman33]

I'll put the old intake on tomorrow and see what happens

 

[RubySlow]

Ok so today I put back on the tips on my mufflers (air silencer or w/e)
they look like this

Anyways after they were on and I went to go try them out, I saw a Big improvement, Not a Huge,.

I know the computer likes back pressure, And It seems this helped...

 

[Jakee]

How about a 50 shot off the line???








What? It would fix the problem!


I'll be surprised if this turns out to be the Intake. You know, I've heard that if you block off the intake PVC line and use a filter, you need to do the same on the regular PVC valve because the air is metered air. In other words, if you filter one, you need to filter both. It makes sense but I believe this is so small, but I guess it could skew the air to fuel and maybe run leaner.



I wonder if your H-pipe is in the optimal location.

 

[techieman33]

I don't really think nitrous would help much, it would be just like every other mod, give me more power, and make the power difference even more noticeable. I don't have an H-pipe, they just run straight into the muffler.

With the stock intake

with the mac intake

 

[Jakee]

So the problem is still there?

Did the truck feel this way before you started modding, just getting worse, OR you can feel it more, when awakening the engine with mods?


Bad gas, clogged injectors, fuel filter,,,heck, I wish I could help more..