my delteq system is on its way here and i wanted to know if i still needed my MSD BTM unit for my blower? does this system come with something to retard timing/boost? if not how would i hook up the msd unit to this system? what else would i use if the msd unit won't work with this setup?

 

As far as I know, the Delteq does not have any means of controlling the timing which is the main reason I went with the LTCC. The 6-BTM will not work with the Delteq, you'll need one of MSDs digital units made to control multiple coils.

 

will the other MSD unit control timing retard/boost? if not what will i do bout that since the BTM unit is worthless now...

 

The MSD DIS ignitions are what you will need. They do not retard tin=ming in relation to boost though, you will have to set the amount of timing retard by RPM. Here is a link to the MSD DIS ignittions.
http://www.msdignition.com/ignition_24_6211_6215.htm

 

BTW, Summit sells them for around 400.00 .
http://store.summitracing.com/defaul...=egnsearch.asp

 

hey Bro i just found that in my summit magazine. is that the only option? if i have the computer just pull the timing on its own i would lose hp. what are other guys running?

 

That is about the only option with the delteq. Have you already ordered the delteq unit? I'm putting together a 16 psi T-trim setup right now, I went with the LTCC because it has a built in 2 step timing retard thats perfect for boosted applications. I also just got into the LT1 edit stuff because no one around here does dyno tuning for LT1s. The DIS ingnitions and or LT1 edit are the only 2 ways to control the timing with the Delteq unit as far as I know.

 

well once i get the system hooked up- its in the mail. then i plan to get it to a dyno shop 45mins away and i have tunercat and another file downloaded. but with the MSD box is it the way to go so i won't lose any power just having the computer pull the timing?

 

if i had the extra money and know how i would get a laptop and do it myself, but still need a dyno tune anyhow. all i have is a mail order tune. wonder how hard its going to be to wire up the MSD box to the Coil packs?

 

I wouldn't think wiring up the MSD would be that difficult. I would definatly recommend it though, that way you can have them tune the PCM for maximum power on race fuel. With some kind of timing retard you can pull some timing for running around on pump gas and when you go to the track you can add race fuel and run the more aggressive timing to make more power. You could probably sell that 6-BTM for 100.00 or more to make up some of the cost for the MSD DIS ignition box.

 

Just FYI, I recently e-mailed a question to MSD and they told me they made 2 multi-channel BTM's that are compatible with the MSD DIS-4 ignition system. P/N's are 6562 & 6563. You can view it on their website here:
http://www.msdignition.com/n2000b.htm

 

Just program the timing you want into the PCM. Why bother with an ad-on? These are used as a bandaid in situations where you can't control (reprogram) the PCM.

Rich

 

I'm by no means an expert when it comes to aftermarket PCMs, but are you able to program your timing to be retarded by a set # of degrees as the boost (not the RPM) increases?

 

No, you can't. But where was it ever written that this was the right way to tune a blower car? In fact, it is far from the best way to do it, as I have seen many times on the dyno. It's a crude method at best. When you create a timing curve using the stock PCM tables, it's true that all you have to work with load up to 1bar and rpm. So, there is no way to directly vary timing with boost. However, at WOT (which is for practical purposes the only time a setup like this sees significant boost) rpm and boost are closely related. So you just tune the WOT (100kPa) part of the timing table according to rpm and it works very well.

Using a linear BTM puts you in one of two places. If you set it for optimum retard at peak boost, there will be too much timing under boost until you appraoch max boost. If you set it to optimize off peak, there will too much retard at peak.

Think of a BTM as a bandaid for situations where you can't preprogram the PCM. Of course, you still need more spark energy than a stock ignition (for an LT1) to run under much boost and need some sort of box for that.

Rich

 

Exactly...tune on the dyno, then verify on the street.