Guru_4_hire

So I was reading this thread in C4 about putting the LS1 individual coil setup on LT1's.
http://forums.corvetteforum.com/zero...=629638&page=1

I was wondering if it would be possible to develop a similiar system for Older small blocks like in our C3s. I think its some form of a crank trigger system.

American Boy

I tried to figure something out a while ago and the big problem is the timing advance. A crank trigger is available already, the coils are easy to figure out but how to manage a timing curve that respond to rpm change and vacuum change is out of my league. Maybe someone have an idea??

Stephan

Guru_4_hire

apparently they have a conversion that will turn it into an LT1

Guru_4_hire

This is the post that interests me

as well as this one.

It would seem to me that if we could simulate the LT1's signals we could run the same conversion.

I am also interested in the crank trigger conversion. I want to know how that works.

If anybody has any ideas let me know.

Scooter70

I believe the Optispark is just like a distributor, telling which cylinders to fire when. I think it's driven off of the front of the cam instead of the back like a distributor. I opted to do the LS1 coils, along with the rest of the engine and transmission. I can help out if you want to swap the whole motor.

Guru_4_hire

so you put LS1 coils on your small block, or you swapped in an LS1

Scooter70

LS1 in my '70. :auto:

turtlevette

you gonna have it ready for summer? attending any COM events this year?

LAvetteman

I have done a little research on this conversion for my LT1. To be honest its hardley worth it for that motor much less a distributor fired motor.

Bottom line, the LS1 engine in its entirity is still king of the road.

mrvette

King of the road??? well, 400 hp from 350 ci isn't bad for a NA engine, but that goal is relatively easy in most 355 ci SBCs'.....so other than weight, just what is the advantage to the LS1???, I mean since we are talking hotrodding here the EPA and inspections are out the window either way none of this stuff passes inspections, flunking on the 'visuals'.....which is stupid, I know, but never the less is the case....

so I have thought of doing a coil pack conversion to my old style L98, so the questions I have about it revolve around just exactly what does that project bring to the table??? any better HP?? better running??? HOW??? and I can't visualize any improvement....once the ignition is computer controlled, it's over...

GENE

pillowmeto

efficeancy
there are 9 second naturally aspirated non juiced LS1s out there now, thats pretty ahrd to do with any other small block, expecially considerign they are just using ported stock heads.
You coudl control the whole system via the computer from the LS1, i cant see any wya to run the individual coil ignition, and to do that youd have to use all the sensors that the LS1 has. So you could spend about twice as much as a LS6 costs to install the system on a gen 1 sbc, and gain 5 hp
i dont see the point, yet. I like HEI
You might be able to modify a MSD setup to run one, but that woudl require programming and a bunch of gurus.

MAtt

LAvetteman

Yea Mrvette, what pillow said!!!!

And remember, the LS1 is a 346 not a 350. :)

Like I said, alot of drama with very little benefit for an LT1 much less a distributor fired engine.

American Boy

I looked closely to the LS1 system and I don't think that it would fit a carburated small block without major headache. That would mean building a box that control the timing advance.

I think that for an old style small block with distributor and mechanical advance, the best improvement would be an MSD box. That's with an engine that rev over 5000 RPM and that produce over 350 hp. Under those 2 conditions, I think personnaly that the stock ignition system is quite adequate.

Stephan




[Modified by American Boy, 10:47 AM 4/11/2004]

neverendingproject

if anyones really serious about this, look into electromotives set up. it uses a coil for each 2 cylinders and is completely adjustable w/out a computer. you set your idle timing via the crank trigger . turn a screw to adjust max timing. uses a map sensor like the vacuum advance.
the benefit of these type systems are longer coil charging time. it only fires the plug once per engine revolution( ls1) or twice for the electromotive set up.


[Modified by neverendingproject, 10:43 PM 4/11/2004]

mrvette

Well, I allready have for some years now...a hotrod open port version of the injection with HEI and hotrod chip....

so apparently my conclusion is correct, there is no particular advantage to the dist-less coil package....crank triggers are not all that hard to rig up, and cam sensors are even easier....so the use of the computer is allready being done, I guess it's case closed for me anyway....

no???

GENE

American Boy

http://getfuelinjected.com/products/hpx.html

That unit is really nice with a price of 600$ plus the map sensor. It's a great improvement over the mechanical advance. You have a nitrous retard built in and two Rev limiter too. :smash:

Stephan