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turbo06
Guest
I've herd u can make the 7m coils like the 1jz and then i saw a link about a wiring diagram but it dosn't work so how do I make the 7M coils like the 1JZ
rakkasan said:
OR
Are you saying the link didnt work? If thats the case then here is the wiring diagram:
http://www.driftmotion.com/driftmotionignition.bmp
i may be retarded but what does this mod do?
and i looked for bigaarons diagram and couldn't find it.
and i looked for bigaarons diagram and couldn't find it.
^i just posted the link to BigAarons diagram how can you not find it?
this mod is so that you can run 1j coils (COP) with 2, 7M-GTE ignitors. there is probably no preformance gain with this mod, just cleans the engine bay up a bit.
this mod is so that you can run 1j coils (COP) with 2, 7M-GTE ignitors. there is probably no preformance gain with this mod, just cleans the engine bay up a bit.
oh, ok. i thought it might be some way to trick the tems into running the hard setting all the time or something like that.
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turbo06
Guest
ok now the link worked. yeah i want the engine bay to look cleaner like the 1jz. The 1jz looks extemely clean with that coil setup.
thesandymancan said:
no we are talking about ignition coils. if you want the tems firm over ride mod, see SOGI.
The performance benefit to this is as you rev your engine higher you have less saturation time to charge the coil. On a 7m you are firing one coil for two plugs so it doesn't get as much time to say "catch it's breath". Going with one coil per cylinder that has to only worry about firing one plug per cycle instead of two plugs per cycle potenetially gives you more spark at the plug each time it fires.
X-man: the way that the diagram above is wired, isnt it still firing 2 coils per cycle? or does that not really matter since each plug has its own coil? Just trying to figure this out. thanks.
With this set up instead of spreading the spark energy from one coil too two plugs, you are giving each plug it own coil potentially increasing the available spark energy to one plug. It would still get into how many windings are in the coils used versus stock the stock coils. If it's on a 7m engine with a 7m ecu or even an AEM it is still going to be waste spark. I never had spark issues with my stock setup until 26 psi at 605 rwhp. I then added an HKS DLI and this fixed that issue. This set up does look alot cleaner and has the potential for performance gains.
T
turbo06
Guest
i still feel that putting coil packs engineered for sequential ignition will NOT work to our benefit while retaining wasted spark.
jz's are setup up for sequential spark. which means the coils fire ONCE for 4 strokes. the primary winding is designed for a proper length based upon this function.
the 7M's are setup for wasted spark. this means the coils fire TWICE for 4 strokes. the Primary winding is designed with a proper length based upon THIS function.
in theory, to get the same energy discharge from a sequential coil pack on a Wasted spark setup... youd need TWICE the winding length since youve only got HALF the saturation time on a wasted spark ignition.
basically, the jz's are being fired before they have a chance to fully saturate w/ a charge. they arent designed to saturate as quickly as 7M coils.
you NEED to find a coil pack that can saturate it's windings in the same time that a 7M can. otherwise, youre just pissing current into the wind and its landing on your feet.
jz's are setup up for sequential spark. which means the coils fire ONCE for 4 strokes. the primary winding is designed for a proper length based upon this function.
the 7M's are setup for wasted spark. this means the coils fire TWICE for 4 strokes. the Primary winding is designed with a proper length based upon THIS function.
in theory, to get the same energy discharge from a sequential coil pack on a Wasted spark setup... youd need TWICE the winding length since youve only got HALF the saturation time on a wasted spark ignition.
basically, the jz's are being fired before they have a chance to fully saturate w/ a charge. they arent designed to saturate as quickly as 7M coils.
you NEED to find a coil pack that can saturate it's windings in the same time that a 7M can. otherwise, youre just pissing current into the wind and its landing on your feet.
X-man said:
hate to break it to you but the 7m dual coil towers have a dwell time of 3.3ms. Trust me it has enough breath for about 12,000 rpm before "it loses it effectiveness"
flubyux2 said:
that MIGHT be the case or not. It depends on the mH of the coil itself and the primary resistance. We know for a fact that the 1jz coil has more mH as it takes a longer dwell time to acheive peak saturation. Otherwise BigAaron would not have had issues using the 1jz coils on the stock 7m ignitor.
figgie said:
Aren't you the same guy that thought a GT42 had a 4 inch inlet?
http://www.supraforums.com/forum/showthread.php?t=374055
You try to fire air/fuel mixtures at a high enough boost level on 7m coils and they will loose effectiveness alot sooner than that without some help.
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X-man said:
bud
that is for most any coil including the all mighty gm dual towers.
As for that thread in BL land. Garret does not publish the information in neither their pdf nor site. So before taking someone else statement at face value as I was told, I researched!!! yes that is right, it is quite simple to ask. I do it all the time when I do not know the definite answer to a question. Is there an issue with that or does this "prove" something? :aigo:
figgie said:
You interject in about every thread on this forum with some smartass remarks instead of any info worth while. The whole jist of this thread was to find out about a link to a wiring diagram to make a 7m coil set up similar to or running individual coils. It was then brought up about any possible performance gains or was this a cosmetic upgrade. It had nothing to do with 7m coils being inferior to 1jz coils. I have never seen you post any results or experiences with firing 7m coils at 12,000 rpm nor have I seen you post experiences with firing 7m coils at 27 psi plus of boost. Who cares if 7m coils will fire at 12,000 rpm, what does that have to do with anything asked in this thread about whether or not a link works to a wiring diagram about wiring 1jz coils to a 7m?
You hate to break what to me? I have had experience running a 7m at 30 psi plus and trying to deal with what happens and can't keep up in the ignition system. It is alot more likely that people might want to know about issues in trying various coil or ignition systems and what they might encounter than the bold statement that 7m coils will fire at 12,000 rpm as long as you don't make them work hard or put any load against them.
X-man said:
about every thread on this forum, wow your statistical analysis is nothing short of fnear sighted and flawed in almost every single way possible.
Just because I cut through the bullshit and lay it down like it is does not detract from the facts posted. feeling be damned.
As for the 7m coils and 28 psi. Why push 14 year old coils that way. 20,000 volts running through any damn part will take its toll. Try to ask more of that part and immenant failure will procede. as for the 12,000 rpm. It is called simple logic. If coil X can push 16,000 rpm. Coil Y is unknown but the primary and secondary windings mH are relatively close. Then dwell time will be RELATIVELY close meaning that the performance of one coil can and WILL be used as comparison of capabilities. Of course read my statement above on 14+ year old coils to see what I think of you "assesement" of the 7m coils.
As I stated in SF and guess I will state it here. Not you or anyone else will ever find out what my car does UNLESS by my own choosing. For all intensive purposes I might have a steaming pile of crap hondur and just post on here because it gives me a hardon. Of course on the other hand I might have a supra that is actually built with lots of "stuff" or it might be a bone stock supra. You are entitled to your opinion but that is all it is, your opinion.
and please indicate to me where in all my posts I stated that the 7m coils were superior or inferior to said 1jz coils. PLEASE. My reading compehesion of my own typing apparently is non-exsistant.
Why push 14 year old coils to 28 psi? Why bring up 12,000 rpm? Who said anything about 14 years old on the coil packs? Again I made a statement about POSSIBLE benefits of running a single coil on plug set up and this is when you jumped in and started off with the fact that you hated to break it to me about 7m coils and their dwell time. Thus impliing some kind of 7m coil supremcy since you didn't mention any other coil. I never asked nor cared if you told me anything especially since it had no relevance to this thread, kind of like this whole pissing match.
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