The cam has arrived, the cam has arrived!

[AaronGTR]

What I was instructed to do was to get the pushrods to zero lash. Gently twisting the pushrods while tightening the rocker nuts until I can feel a gentle resistance. At that point I was to make another 180* to 270* turn on the rocker nuts and that was it. The thread lock was to keep the nuts from loosening during operation.

That would be the correct way to set pre-load on hydraulic roller lifters if you are using adjustable (floating) rockers. Those go over a stud in the head and have a nut that holds them on. The stock rockers sit on a solid metal pedestal that keeps them aligned so you don't need guideplates and automatically sets the preload because they are all at a pre-determined height. You just tighten down the bolt in them and torque them. Not sure when they started using those rockers though. You must have the earlier version that still used guide plates I assume?

[Schmieder]

You must have the earlier version that still used guide plates I assume?

yes

Donor car was a 95-96 Beretta.

They are 1.6:1 non-roller rockers w/ the pushrod guide plates. Can't remember name, ball?? fulcrum?? I forget...

[3400-95-Modified]

Hi fellas my name is Steve I just joined but would like to say that I am looking forward to hearing the idle of this monster lol please post a vid clip if possible. CHEERS!!!

I have a video of the idle of my cam... link in the sig.

I will be curious to hear his though, since his biggest request was a good idle that he could deal with. Hell the OBDI system he had was having trouble keeping the stock 3500 idling smooth sometimes.

yes

Donor car was a 95-96 Beretta.

They are 1.6:1 non-roller rockers w/ the pushrod guide plates. Can't remember name, ball?? fulcrum?? I forget...

Even the non rollers you have no way of securing the nut inside the pressed rocker against the ball, you should have once again tightened them down to where they stop. The studs are setup to allow the rocker to float, but once again this type of setup is not adjustable since you are not using a nut you can secure. Thread locker is not a proper securing agent when it comes to a item like this. Also do not believe everything you read on the web about setting lifter pre-load and lash, because 9 time out of 10 they are referring to a floating rocker SBC V8 setup, and really lash is only used on a solid lifter engine, hydraulics all need pre-load.

The procedure you described is exactly what we do with our race engine, BUT only on the flat tappet version with the full roller floating rockers... The other engine is a GM crate which has a roller cam and stamped steel rockers that are not adjustable, so its the same as our 60* setup.

Your lucky that you did this with the guide-plate set and not a roller set otherwise you would have probably had a large failure by now with how those rockers are designed.

[IsaacHayes]

I think I will start with DF code (DOHC) on the 5spd car, as it seems to idle well on 3x00 engines and is a little more advanced. I can always drop A1 code (3.1mpfi) on my PCM. I may even go to the modified V8 TPI code that some guys on V6Z24 are doing. it has a nice spark retard vs VSS table, which would be nice for traction off the line with a 5spd.

[robertisaar]

I think I will start with DF code (DOHC) on the 5spd car, as it seems to idle well on 3x00 engines and is a little more advanced. I can always drop A1 code (3.1mpfi) on my PCM. I may even go to the modified V8 TPI code that some guys on V6Z24 are doing. it has a nice spark retard vs VSS table, which would be nice for traction off the line with a 5spd.

you could also use the launch mode spark advance if you enable the flag for it with a manual... it's intended for adding spark to get the torque convertor to spin up faster while at low MPH, but i have a feeling it could be used in more devious ways...

[IsaacHayes]

Will that table accept negative values though? hmm.

[robertisaar]

as is, no.

BUT

it uses a bias. just set the bias to like 10* and then all the values in the table that were 0* are now a 10* retard.

i may have to edit the XDF to reflect this...

[pocket-rocket]

as is, no.

BUT

it uses a bias. just set the bias to like 10* and then all the values in the table that were 0* are now a 10* retard.

i may have to edit the XDF to reflect this...

That's not nice to call Isaac a retard (no matter how funny it is).

Is this launch mode in all code masks or a small hand full?

[IsaacHayes]

So the bias is how much it retards, and the table is how much it adds? So set the bias to the max you want to retard, then in the table start at 0 and work your way up until it's back to normal??

Should be in all DF bins, as the auto/manual bins just have certain flags enabled to operate in manual or auto mode.......

[pocket-rocket]

If it's a DF only, I guess that's one more perk to using DOHC code

[robertisaar]

definitely in DF, 88, 8D and A1. probably in 6D.

isaac: that method should work perfectly, you can even put the bias "higher"(more retard) and then just zero the table anyway, and then allow for more retard through the table alone instead of adjusting the constant and then the table again.

assuming a table filled with 0*, if i modify the XDF, and put 10* in the constant and allow the table to reference it, it will show -10*, and you can do whatever is necessary.

[3400-95-Modified]

As you said to me about how to fix OBDII table limits...

wow, what a mickey mouse way of fixing something...

[robertisaar]

but that was correlating time with RPM... not an exact method since a few things could throw off the rate at which the engine speeds up.

this is something GM left in the BINs, just never utilized in this method. normally it gives more advance, but we have a way of removing it without affecting anything else, win in my book.

HOW DID WE GET THIS FAR OFF TOPIC!?!?!?

[3400-95-Modified]

PE vs time is also something that's in the bin to add more fuel since the longer the engine is running in PE mode then it will need more fuel due to the increased heat in the combustion chamber, so you can use that tool to increase fuel if your maxing out the maf table too... So its the same thing, its a table your using for something else that it was not designed for.

Ask Isaac about the off topic... He posted this

I think I will start with DF code (DOHC) on the 5spd car, as it seems to idle well on 3x00 engines and is a little more advanced. I can always drop A1 code (3.1mpfi) on my PCM. I may even go to the modified V8 TPI code that some guys on V6Z24 are doing. it has a nice spark retard vs VSS table, which would be nice for traction off the line with a 5spd.

Only relevance is the idle comment, then you guys went off on the spark stuff.

[kwhauck]

so exactly how big is the cam?