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Old 05-21-2012, 04:12 AM   #261
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Originally Posted by shuiend View Post
I highly doubt the junkyard will be cheaper then new. Every yard I checked at were quoting me more then the cost of new ones. Then you factor in the amount of time you have to spend driving there and then searching around for the coils.

I have used both the truck ls coils and the ones from the vette. I have had less problems with the ones from the vette at up the 17psi.
Hmm, it's true, I looked a the price list and igniters are @ $24 a piece
I could still try and see if I can convince them that the whole coil assembly is 1 pack... Anyways I need to go to a junkyard for a lot of random stuff, so it's one of the things I have to look out for.

edit: I also want to get a built VVT head. I want to have a built, ported head and it just doesn't make sense to build anything other than VVT.
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Old 05-21-2012, 05:54 AM   #262
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Originally Posted by Faeflora View Post
Can you please explain why the smaller fuel return would cause fluctuations?
If you feed through a -10 line at 60psi of fuel pressure (example), you will move a certain amount of fuel. At idle, you need some insignificant amount of fuel, so the vast majority (~97% of the fuel) has to get run back through the return line and to the tank. Since your return is smaller than the feed, the pressure in the return line is higher than the pressure in the feed line. If the pressure in the return line goes above the FPR pressure, your FPR is no longer dictating fuel pressure, and the AFRs will go rich. As soon as you touch the throttle, the car uses more fuel, there's less fuel in the return line, and the fuel pressure drops. When the car is hot idling and needs less fuel, the fuel pressure will rise and richen the car.

You will NEVER get that car to idle properly unless you have an ECU that has incredibly high resolution fuel pressure trims.

Best case is a return that's larger. Since the injectors always use some fuel, using the same size feed and return is fine too. Smaller return than feed is an awful idea.
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Old 05-22-2012, 09:56 AM   #263
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Wrong. Do the math.

Vette makes aroud 60hp/L on more cylinders.

Soviet makes around 200hp/L on fewer cylinders.

That means there is WAY more fuel in soviets cylinder vs vette cylinder.

Hence, sovient needs more spark than a vette

still a bad way of looking at it. what you wanna see is the how many mJs it can store, the voltages it can output, and the gap it can produce.

this is how you compare coils:

Toyota COP dwell curve
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Old 05-22-2012, 12:03 PM   #264
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I ordered the LS truck coils.

The coils:
http://www.ebay.com/itm/320907536103?item=320907536103

The wires:
Amazon Amazon

All that remains would be making a bracket and wiring in the harness. The wires are 12" which SHOULD fit nicely.

So for $191 I basically got 2 sets of coils
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Old 05-22-2012, 12:09 PM   #265
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Originally Posted by soviet View Post
I ordered the LS truck coils.

The coils:
http://www.ebay.com/itm/320907536103?item=320907536103

The wires:
http://www.amazon.com/MSD-Ignition-3.../dp/B0006HPA02

All that remains would be making a bracket and wiring in the harness. The wires are 12" which SHOULD fit nicely.

So for $191 I basically got 2 sets of coils
You do know that those wires probably will not fit into the VC holes correctly. They will not seal the top and allow water in. You can order custom made magnecore wires for about $90. They have a lifetime warranty and will actually fit correctly. I would cancel the amazon order and shell out the extra few dollars for good wires.
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Old 05-22-2012, 12:10 PM   #266
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Are we still going half or did you side with Min?
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Old 05-22-2012, 02:12 PM   #267
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Quote:
Originally Posted by shuiend View Post
You do know that those wires probably will not fit into the VC holes correctly. They will not seal the top and allow water in. You can order custom made magnecore wires for about $90. They have a lifetime warranty and will actually fit correctly. I would cancel the amazon order and shell out the extra few dollars for good wires.
This is the thread where i tell shuiend hes wrong with crap punctuoation and spellif

Wrong.

You can just buy ibdividual booties feom magnecoer or whomeve. Bootie just salides onto tge wire.
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Old 05-22-2012, 02:13 PM   #268
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This is the part where Lars tells Min he has a running car...
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Old 05-22-2012, 02:14 PM   #269
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This is the part where Lars tells Min he has a running car...
No, I have 2 running miatas.
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Old 05-22-2012, 02:16 PM   #270
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and a truck.
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Old 05-22-2012, 02:18 PM   #271
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Originally Posted by Braineack View Post
still a bad way of looking at it. what you wanna see is the how many mJs it can store, the voltages it can output, and the gap it can produce.

this is how you compare coils:

Toyota COP dwell curve
Wut

I am correct. Vette has less fuel in every ifnition event than any of our boosted cars. Therefore spark reuirement is lower. .
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Old 05-22-2012, 02:21 PM   #272
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Quote:
Originally Posted by shuiend View Post
You do know that those wires probably will not fit into the VC holes correctly. They will not seal the top and allow water in. You can order custom made magnecore wires for about $90. They have a lifetime warranty and will actually fit correctly. I would cancel the amazon order and shell out the extra few dollars for good wires.
What's the correct plug end for Magnecor wires?

http://www.magnecor.com/magnecor1/files/catalog.pdf
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Old 05-22-2012, 02:22 PM   #273
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No, I have 2 running miatas.
I texhnicyl have

Two running miatas

One sounds like it has a fork stuck in farbage disposal

And a truck tht is called WUBYWU
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Old 05-22-2012, 02:41 PM   #274
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Originally Posted by soviet View Post
What's the correct plug end for Magnecor wires?

http://www.magnecor.com/magnecor1/files/catalog.pdf

Gove magnecoe a call. They are very nice and helpful and will prob b able to tell u what bootie u need and sell it for chezarp
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Old 05-22-2012, 02:48 PM   #275
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I guess I will. But after I make my bracket since I have no idea how long the wires will need to be.
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Old 05-22-2012, 03:01 PM   #276
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I guess I will. But after I make my bracket since I have no idea how long the wires will need to be.
Yeah I would say cancel the order from amazon for plug wires. Then once you have a bracket made and can measure the lengths of the wires, call up Magnecore. Tell them the part number for the LS coil you have, then you tell them it is going into a miata head, and then give them the lengths for each one. They will custom build them with both ends that will fit perfectly. Prices range from $90 and up depending on the length of the wires. I will assume that you won't be ordering very long wires so price should be right around $90. They said they generally get them built and shipped within a day or two. It might be slightly more then building them all yourself, but the fact that they are done correctly, and come with a lifetime warranty is worth the extra few dollars.

Also let me know when you get your coils in, I will prob want to borrow a set briefly so I can test fitment with the FM Brackets.
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Old 05-22-2012, 06:08 PM   #277
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No, no, no, no. Do not do any of this.

Smaller return than feed is an awesome way to get fuel pressure fluctuations at idle and low RPM which will wreak havoc on the driveability of the car. The return line needs to be the same size as the feed line. There is no reason to downsize it, and every reason not to.

Aluminum hardline under the car? Sure, if you like things puncturing it. Aluminum hardline is probably the most useless material on the planet for automotive applications - it's weak, impossible to flare easily, and highly susceptible to vibration and fatigue failure. If you really feel the need to use hardlines, then do stainless steel hardline, or don't bother and just run braided SS w/ PTFE internals. If you do it right you can delete 4 fittings, which reduces the number of failure points in the system as well.

Remember that with E85, there are three things that are allowed to be in the fuel system:
-Anodized aluminum
-Stainless steel
-Teflon

No rubber, no bare aluminum.


I have never once had a problem or seen a problem with an aluminum line. Never had a problem flaring one either.
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Old 05-22-2012, 06:27 PM   #278
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Originally Posted by shuiend View Post
Yeah I would say cancel the order from amazon for plug wires. Then once you have a bracket made and can measure the lengths of the wires, call up Magnecore. Tell them the part number for the LS coil you have, then you tell them it is going into a miata head, and then give them the lengths for each one. They will custom build them with both ends that will fit perfectly. Prices range from $90 and up depending on the length of the wires. I will assume that you won't be ordering very long wires so price should be right around $90. They said they generally get them built and shipped within a day or two. It might be slightly more then building them all yourself, but the fact that they are done correctly, and come with a lifetime warranty is worth the extra few dollars.

Also let me know when you get your coils in, I will prob want to borrow a set briefly so I can test fitment with the FM Brackets.
oo o o o

OR YOU CAN BUY THE USED WIRES AND JUST BUY BOOTIES. and no the bracket wont fit. These coils are fatties.
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Old 05-23-2012, 01:16 PM   #279
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dyno shop put video up


my car is... so quiet
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Old 05-23-2012, 01:29 PM   #280
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I do not see any fireballs shooting out the back. I am disappointed.
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