Ignition Impulse @ Balancer/Dampner

[Tyler Townsley]

Originally Posted by VetteVet

Tyler,

I have done the secondary delete. Are you running all 16 injectors at idle? I was under the impression that pulse widths got too short at idle to fire all 16 injectors reliably enough for smooth idle.

I've just started digging into the 411 PCM, but so far I'm pretty impressed.

My idle is messy but I am also running stage 2 cams and pretty serious porting so not sure if it because of the pulse width or low velocity at low rpms. It comes on so strong about 6k that it pulls through the clutch.

GM learned a lot from the development work done by Lotus and followup stuff with the racing effort. If you are going to compete at that level you need the best.

Fastlane went to single injectors and a Motec in 93-94 and he probably knew more about what works than we realized at the time. Every time I talked to him I learned something. He told John L what he wanted/was doing and John woluld try it and find he was ahead of everyone. To bad he left the hobby. You want turbo code for the LT 5 just borrow the ecm/code from the Cerve III. Geoff said they tested that for a lot of hours on the dynos at Lotus before releasing it for that car. (He did have that code, not sure he still has it though.)

Tyler

[VetteMed]

Originally Posted by A26B

If 16 injectors are a problem, why not just ditch 8 of them and simplify?
Here's a solution, work-in-progress......

Jerry, I was wondering if someone was going to bring up that option! Looks like a lot of work into those pieces, any "story" to go along with them?

[RHanselman]

What are you going to do with it? I could give it a try on the turbo car...

[A26B]

Rat,
Well, you know it's like a Mona Lisa, there's only one.....except i think i have 2 of these, so they are worth only 1/2 a zillion apiece. Kidding aside, I'm not sure yet, probably offer them on the website. I have billet rods & titanium spring retainers now, so may as well offer the advanced balancer!

No one has yet offered up an opinion on the inner circlle of windows. Looks just like the crank reluctor to me, with the 9th small cutout. If it serves the same purpose, it could eliminate the need for the reluctor on aftermarket stroker cranks by picking up the crank position here, with it properly indexed to the crank. Cam timing could be handled with a degree wheel, something a stroker build would do anyway.

[Merlot566jka]

Originally Posted by A26B

I found another unusual LT5 goodie in my stash. New balancer/dampner machined for interference fit with the impulse wheel. Once it's properly timed with the crank, would probably be best to drill & tap for small screws to keep it in place.

Anyone care to step forward with some information & suggestions?

Interesting. I do not think this will work on the 411 pcm. the pulses on the 411's reluctor are 12* and 3* (total 15*) and I believe its the trailing edge of the tooth that initiates the trigger. As you can see on this wheel, the tooth and gap count are even.

I am in your area Jerry, Is there a way I could come by and throw this on a coppy machine and leave with a print of it?