Need the definitive answer on DSM injectors...

Post by **c-rad** » Fri Dec 03, 2004 12:03 pm

I've used the search and found out a few things: The stock CA injectors are low impedance (~2 Ohms). DSM injectors can be used but some people say you need a resistor pack? Why is that? DSM injectors are low impedance as well. I just tested the resistance on mine and they are 2.9 Ohms. So I guess I am just wondering, is the resistor pack really necessary?

Post by **biosehnsucht** » Fri Dec 03, 2004 2:25 pm

You need an injector resistor pack, regardless.

If you have one (stock or DSM) then you don't need another, doesn't matter which you have. You can use DSM injectors w/o anything else, excepting of course a ROM tune or a SAFC type device to tune the ECU for the injectors.

Post by **c-rad** » Fri Dec 03, 2004 2:49 pm

biosehnsucht wrote:You need an injector resistor pack, regardless.

If you have one (stock or DSM) then you don't need another, doesn't matter which you have. You can use DSM injectors w/o anything else, excepting of course a ROM tune or a SAFC type device to tune the ECU for the injectors.

Maybe I am retarded and missing something here...

Is there an inline resistor pack in the harness that comes with a CA motorset? This is the thing I am not getting. If the CA injectors are low impedance, why would I need to alter the resistance of the dsm injectors?

Post by **biosehnsucht** » Fri Dec 03, 2004 3:45 pm

You should have one, if you don't you'll need one.

The injectors are low impedence but the ECU can only drive high impedence injectors hence the resistor pack, this is usually the case for vehicles w/ low impedence injectors, like DSMs, as they use resistor packs too

Post by **RMiller** » Fri Dec 03, 2004 4:09 pm

The stock ca does use a resistor pack.

DSM injectors are a direct replacement for the stockers. I use them along with others. Read the FAQ!

Post by **c-rad** » Fri Dec 03, 2004 4:17 pm

I DID read the FAQ and I did search. I was just confused about whether or not a resistor pack was used in stock form like on the DSMs. It's all cleared up now though. Believe me, last thing I want is to feel like a total newb. I've been in the DSM community for 4 years and am finally going back to my Nissan roots! I appreciate you guys going easy on me with some of my questions. I've noticed it's a pretty tight-knit community here in the CA forum which I hope to contribute significantly to.

Post by **RMiller** » Fri Dec 03, 2004 5:18 pm

Cool. Yeah we're REALLY close, if you know what I mean....

Post by **biosehnsucht** » Fri Dec 03, 2004 6:18 pm

DSM is physically and electrically a direct replacement but you WILL need some way to control the injectors as you would run uselessly rich with a stock ECU. Either tuned ROM on the ECU or a SAFC or similar device

Post by **c-rad** » Fri Dec 03, 2004 6:23 pm

biosehnsucht wrote:DSM is physically and electrically a direct replacement but you WILL need some way to control the injectors as you would run uselessly rich with a stock ECU. Either tuned ROM on the ECU or a SAFC or similar device

I already have a S-AFC and the 550cc injectors. I will be using that in conjunction with a Z32 MAF. I would prefer to get a base rom tune for the 550s and MAF and just use the SAFC to fine tune it on the dyno.

Post by **RMiller** » Sat Dec 04, 2004 12:26 am

DSM injectors are 450cc.

Post by **c-rad** » Sat Dec 04, 2004 4:27 am

RMiller wrote:DSM injectors are 450cc.

Umm...yes, I know. But I had 550s in my eclipse before I put it back to stock. I was running an EVOIII 16G, 550s and a SAFC.

Post by **float_6969** » Sat Dec 04, 2004 5:18 am

Guys, c-rad knows his DSM stuff, so go easy on him. And just to remind everyone (nobody did anything, I just want to bring it up) that NONE of us was born knowing this stuff. I've been screwing with these cars for about 5 yrs now, and have been learning about the CA for the last 3. I came in here just like every other newb, asking stupid questions and not searching. But time is an excellent teacher. So please, always remember that when someone asks a question that seems simple, remember back when YOU were a newb. Like I said before, nobody did anything wrong, and this is rarely a problem in the CA forums, but I just wanted to give everyone a little reminder. Thanks!

Post by **RMiller** » Sat Dec 04, 2004 5:20 pm

c-rad wrote:
Umm...yes, I know. But I had 550s in my eclipse before I put it back to stock. I was running an EVOIII 16G, 550s and a SAFC.

Sorry, I didn't mean to sound condescending. Sweet setup you had on your DSM. Evo 16g is so awesome.

Post by **c-rad** » Sat Dec 04, 2004 8:04 pm

Yeah, if I could get a manifold with a mitsu flange I would just put that turbo on the car. I got that turbo brand new with gaskets and new crush washers for $569 shipped. Maybe we can convince forced performance to make a T25 style housing to fit the TD05 turbine wheels. That would open up the options for the 14b,16g, 18g, and 20g (TD05 version 20g anyway...).

BTW, I don't think you were condescending... I am sure newbs flood the forums every now and again that don't know their head from their ***. I on the other hand am pretty knowledgable. I am just new to some of the quirks of the CA. Oh, and I will delve into ANY project. Here is a FAQ I made for installing a BM transmission LSD insert in a GST-- http://bmtranny.escic.com I REFUSE to take my car to the shop for anything other than alignment and tire mounting/balancing. Having an Advance Auto Parts store in 5mins walking distance comes in handy...

Post by **8ggalant** » Sun Dec 05, 2004 8:30 am

c-rad wrote: I REFUSE to take my car to the shop for anything other than alignment and tire mounting/balancing.

amen to that...i actually did write them about dsm turbo's as i am just getting out of that scene also...we'll see what they say (if they reply)

Post by **float_6969** » Sun Dec 05, 2004 9:23 am

It's funny to me how many DSM'ers we get in here....

Post by **c-rad** » Sun Dec 05, 2004 9:57 am

float_6969 wrote:It's funny to me how many DSM'ers we get in here....

CA18 and 4G63 engine designs are VERY similar. I just put Nissan a few pegs higher than Mitsu in terms of build quality. Plus everyone and their brother has a DSM. And let us not forget, fwd = teh suck.

Post by **float_6969** » Sun Dec 05, 2004 10:24 am

fwd = Ghey wheel drive

Post by **RMiller** » Sun Dec 05, 2004 10:33 am

DSMs are what got me to like small turbo motors. When I was 16 and looking to buy a car, I wanted a '93+ Z28. I ended up getting a Mustang GT, which has been really good to me and is still fun to drive, but too boat-ish.

Post by **T88lexus** » Sun Dec 05, 2004 1:10 pm

there is a different than 4g63 than ca18det..

4g63= crank walk, weak transmission ( later model of evo are better, freind here has RHD evo5, his hold up pretty well)ca18det= no crank walk, but weak transmission( I dont call any sr,ca,ka transmission strong) unless they are RB25,or VG.

I worked on 4g63 with 2.4 stroker with T61 and 75 shot. who know how many motor he wen thru.. just because of CW.

but only thing about DSM.. they could be wack up fast if they decide to run

Post by **fanta** » Sun Dec 05, 2004 2:03 pm

Another DSMer signing in, small 16g'd '90 AWD

Post by **c-rad** » Sun Dec 05, 2004 7:34 pm

T88lexus wrote:there is a different than 4g63 than ca18det..

4g63= crank walk, weak transmission ( later model of evo are better, freind here has RHD evo5, his hold up pretty well)ca18det= no crank walk, but weak transmission( I dont call any sr,ca,ka transmission strong) unless they are RB25,or VG.

I worked on 4g63 with 2.4 stroker with T61 and 75 shot. who know how many motor he wen thru.. just because of CW.

but only thing about DSM.. they could be wack up fast if they decide to run

Only the 2G 7-bolt motors got crankwalk. And at that, it was still a rarity. I got crankwalk on mine, so I replaced it with a 1G 6-bolt motor. I've never seen a 2.4L stroker...only a 2.3L. You CAN use the 4G64 which is a 2.4L engine that comes in the spyder models and various older hyundais.

The comparison I was making was the iron block, aluminum head, cams acting directly on the valves...

And yes, DSMs are VERY hit or miss when it comes to running right.

If I were to do it over again, I would have never messed with the Eclipse. Although it was my fiancee's car.... It's a love/hate relationship with them...

Post by **MikelZ** » Tue Jan 11, 2005 7:21 pm

c-rad wrote:Yeah, if I could get a manifold with a mitsu flange I would just put that turbo on the car. I got that turbo brand new with gaskets and new crush washers for $569 shipped. Maybe we can convince forced performance to make a T25 style housing to fit the TD05 turbine wheels. That would open up the options for the 14b,16g, 18g, and 20g (TD05 version 20g anyway...)

..

I know I'm bringing this back from the dead, but this is a really good idea. I know a pretty god fabricator...

Post by **c-rad** » Tue Jan 11, 2005 9:31 pm

lol, so do I. He is going to be using mine as a prototype sometime at the end of next month... I am trying to find a spare CA exh manifold to donate to him...anyone have one they want to donate to a good cause?

Post by **81na ZX** » Wed Jan 12, 2005 5:28 am

c-rad wrote:....cams acting directly on the valves...

You do know 4G63's have rockers right....Mitsu likes hydraulic lifters and roller rockers

Post by **c-rad** » Wed Jan 12, 2005 7:01 am

Yes, I do know that. But mitsu's have one rocker/cam lobe per valve. Not a gay-*** "Y" shaped rocker trying to work two valves.

Need the definitive answer on DSM injectors...

Need the definitive answer on DSM injectors...

Re: Need the definitive answer on DSM injectors... (c-rad)

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