i was wondering if anyone has the defintion files for a Ramjet 350 with a mefi4 controller?
Thanks Jj

 

I don't have the exact one, but probably something to work with.

 

If I recall correctly, the following site has some TunerPro defs for MEFI:
http://www.obd2allinone.com/sc/toplevel.asp?cat=32

 

It looks like they've got them, but they've locked them away in a library for users of their products only. You've got to email their sales department with a request.

Looks like you could get one from MSD with their MEFI-4 offering, but again you need to buy their product. You can download the software for free and the RamJet 350 bin is in there, but you need the hardware key that comes with the purchased product to see it.

I'm running a RamJet 350 with a port modded EBL and would like to look at the factory RamJet spark table. Anybody have one? Mangus?

 

just run a stock vortec L31 table and go from there. should be pretty decent

Fast 305 posted this over at FSC
97 vortec 350 SA table

 

Good suggestion...as a matter of fact I am running the L31 spark table. Problem is, it hits the wall at 4000 rpm and the exhaust manifolds start glowing red - apparently not enough spark advance. When tuned properly, the RamJet 350 makes around 400 ft/lbs almost to 5000 rpm. I would really like to see the factory spark table...anyone?

Here's a dyno sheet from one of the magazine tests of a RamJet 350. A little higher than GM claims, but not much.

 

I would suggest the B-Car LT1 timing map.

 

These would be the iron headed LT1s in the Impalas and Caprices? That's an interesting idea. If I understand the history of the Vortec heads correctly, Vortecs are basically the iron LT1 heads without reverse flow cooling.

I'm at 6600 ft. With the ignition on, engine not running, I see 80 kpa. Looking at the B-Car LT1 timing map at 80kpa (WOT for me) there is definitely more advance in these tables at 4000 rpm. If I can't find an actual RamJet spark table that takes into account the RamJet cam, this looks like a good starting point. Thanks!

 

I hear ya on the altitude. 83 KPA max for me

 

Yes, the B-Car LT1 is the Iron Head LT1 which has the same chamber design as the Vortec and about 1 point more compression, but also reverse flow cooling. The cam in the Ramjet is very similar to the Vortec/B-car LT1.

 

Pm me.