Jake you were right about the 12 and 28 timing!!

NextGen · Post by **NextGen** » Wed Aug 18, 2004 7:11 pm

I finally got the max timing to 28. The car does run cooler and feels like it has more to go at speeds above 75 mph. It cruises easier. But I do feel I lost the crisp power coming on highway speeds. I can use 3 rd gear up to 60 mph, without feeling like I am reving like crazy. Actually around town 3rd is all I need. At 32 degrees my oil temp was maxing at 210f. Now it maxed at 180 to 190 Four degrees made that difference.

So in a nut shell. Yes the car is running cooler, and feels like it is hardly working at highway speeds, at the loss of the snap of a bit of acel.

I am a highway driver so I can live with the above. BTY the 12 at idle is perfect.

THanks
Joe

MASSIVE TYPE IV · Post by **MASSIVE TYPE IV** » Wed Aug 18, 2004 7:53 pm

Great!! I told ya so!

TIMING IS EVERYTHING!!!!!!!!!! 2 degres is worth 5HP or sometimes 50 degrees of cylinder head temp!

That good ole 009 and the advanced timing makes you think its running fine, but the advanced initial timing of the mallory, the faster curve and the limited full advance makes power everywhere!!!

Every time i see someone say their engine makes more power at 32 degrees, I just grin and nod and know the truth.

bottomend · Post by **bottomend** » Sat Aug 21, 2004 7:47 pm

Like money in the bank....

I finally got some time to dial in my Mallory today. I went with the recommendations posted above and ... wadda ya know... I'm now running a fire breathing orange! I was gettting disappointed because I've had the Mallory on for a few weeks and it just wasn't doing it for me...

I was always happy with the perfromance from my AC Net SVDA. I only bought the Mallory because I'm quitely collecting parts for my next engine...

The switch from the stock Dist. to the SVDA was amazing. Hills that were once relegated to 1st gear were now able to be taken in 2nd. I expected similar results from the Mallory. It didn't happen... right away.

It had it set to 8* BTDC and 34* @ 3000. The engine ran smoother but lacked any sense of perfromance. I know I drive a '74 bus but I was used to being able to wind it up and pass any car/suv I needed on the road. I bought the SVDA after being almost run off the road a few times. People out here in LA dont give a damn that a person in front of them is driveing something old and cool. They just want to get by you and pay for thier Starbucks. Fast.

So, now that I've got the Mallory set according to Jakes suggestion I'm back to where I left off... and then some! This thing seems to have more power just about everywhere in the powerband. It just keeps pulling!

NextGen · Post by **NextGen** » Sat Aug 21, 2004 9:16 pm

Bottomend, it opened up some other doors for me. Now that you have it dialed in, you may want to play with your main and idle jets. I am able to get more out of them and riding in slow traffic is smooth not jerky. By lowering the max timing to 28 from 32 I felt I lost some mid range, but figured I would live with it. Now with the larger main and idle the mid range is back as if I was at 32. With the benefit of higher top speed, less stress crusing and cooler running.

bottomend · Post by **bottomend** » Sun Aug 22, 2004 1:36 pm

Well, I'm useing Kads right now but I've got a pair of Dells sitting here ALMOST ready to go in. I've had a little set back but I'm working on it! See my other thread for details. I'm not willing to spend any money or time getting the kads running optimally at this point.

DaveB · Post by **DaveB** » Sun Aug 22, 2004 4:18 pm

So you set it at 28 degrees at 3000 RPM?

MASSIVE TYPE IV · Post by **MASSIVE TYPE IV** » Sun Aug 22, 2004 4:22 pm

Cool! The dyno taught me these settings. Being able to literally see the differences it made on the torque scale was amazing- Across the entire RPM range.

bottomend · Post by **bottomend** » Sun Aug 22, 2004 6:16 pm

I used the little plastic pieces that come in the spring kit. I locked it off at 16* and then set the timming to 12* at idle. Those two numbers add up to 28* at 3000 RPM. At first I mistakenly locked it to 28* and STILL set it to 12* at idle. That setting gave me 40* at 3000 and 50* with my vacuum hose attached. ( I know Jake doesn't recommend the vacuum version of the Mallory, but I bit on the fishing line! Sorry....)

Now I'd like to start playing around with the different springs and see what happens.

Almost everyday I learn stuff while puttering around with this bus. Thanks for everybody's help.

MASSIVE TYPE IV · Post by **MASSIVE TYPE IV** » Sun Aug 22, 2004 7:03 pm

We had an engine failure 100% due to the vacuum advance Mallory.. 5,000 bucks gone.

bottomend · Post by **bottomend** » Mon Aug 23, 2004 12:08 pm

...OK. You have my attention. How does this relate to me? I have a $2000 engine. Am I two and a half times less likely to sustain a failure?

Mark the canuck · Post by **Mark the canuck** » Tue Aug 24, 2004 8:14 am

The nice thing about programmable ignition is I can prove that Jake is right in within minutes. By the seat of my pants I can't tell a difference in power, but at 28 degrees my head temps went down at least 40F.

MASSIVE TYPE IV · Post by **MASSIVE TYPE IV** » Tue Aug 24, 2004 8:16 am

Yep... Now Mark above 4500 RPM pull some more timing out of your system, try 3-4 degrees and see how the top end cleans up and revs faster. Advance is needed less and less as piston speed increases

The Kit Carlson system in, my 912 responded nicely when I did this.

DNHunt · Post by **DNHunt** » Tue Aug 24, 2004 8:46 am

Jake

Let me see if I have this straight. 12 degrees at idle. Max of 28 degrees and all in at 3000. Back out 3-4 by the top end.

Kits ignition must use vacuum as one of the imputs. Any clues how vacuum would affect the ignition table?

Dave

MASSIVE TYPE IV · Post by **MASSIVE TYPE IV** » Tue Aug 24, 2004 8:59 am

Vacuum effects the maps.. The cam I set you up with was designed to have higher manifold pressure at lower RPM, therefore it will compliment The EFI tremendously..

Mark the canuck · Post by **Mark the canuck** » Tue Aug 24, 2004 2:43 pm

Jake, I'm going to want one of those cams for a 78 X 103 engine.

I'll give the timing retard trick a try today!