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RX-7 2nd Gen Specific (1986-92) RX-7 1986-92 Discussion including performance modifications and technical support sections. |
View Poll Results: Which ignition setup would you go for? | |||
LSx Coils with bulkhead fittings through the firewall |
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0 | 0% |
Coil on plug |
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0 | 0% |
other (please explain) |
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4 | 100.00% |
Voters: 4. You may not vote on this poll |
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#1 |
RCC Loves Me Not You
Join Date: Jul 2008
Location: Influx.
Posts: 2,113
Rep Power: 20 ![]() |
Teach me about ignition
So I'm looking at different ignition setups for my car. I was originally leaning towards an LSx style ignightor that I would mount inside the cabin, then pass through a bulkhead connection to the spark plugs. I was going to do this as I thought it would provide for a cleaner install, but would make it a little difficult to work on/replace the coils themselves.
My other option would be a coil on plug setup. Has anyone ever done this before? If so, what issues have you found with it? Do you find installing them on the plugs to be an issue since we have the frame rail so close? What voltage should be used for our cars? 34,000~ V or 42,000~ V? Does it matter? What should I look for specifically in chosing ignition systems (These are for a Haltech PS1k)
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#2 |
Waffles - hmmm good
Join Date: Aug 2008
Location: Huntersville, NC
Posts: 757
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On the evil forum I have a write up for an ignition using HEIs and Ford TFI coils.
Makes a really strong spark. http://www.rx7club.com/showthread.php?t=894669
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1980 GS stockport, Fat Nikki, RB Dual Facetfuel pumps, Holley regulator, RB Street port exhaust, 2GDFIS, MR2 MK I electric fans, 2G strut bar, relayed fans, lights and fuel pump, LEDs Project Fat Nikki Budget 12A rebuild Video setup < $30.00 |
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#3 | |
ORD - Old Rotary Dude
Join Date: Feb 2008
Location: Pelham, AL
Posts: 319
Rep Power: 18 ![]() |
Quote:
I've often wondered why not run a CAS and do a direct fire setup on both leading and trailing, for boosted applications. Otherwise, the trailing is really not even necessary. Another option that used to be available is the Crane HI6/LX92 coils setup. I used this before with incredible success. This combo held up very well to boost with N2O. I had to actually change out the plugs every 3-4 weeks becuase the spark was so hot (mixed with burning the N2O and a 10k rpm redline) that the plug electrodes would almost be burnt completely off. I was running BR8EQ14 plugs in the last setup. All 4 electordes would be burned down to barely a nub. The porcelain/ceramic (or whatever that material is) would crack or break off if I didn't change the plugs soon enough. Of course, Tyler, the last option you (using a general term here) would also have to take a freaking loan out for. I think I had a little over a grand in that setup....then 4 new plugs every month. That's what I get for driving something like that everday. Todd B. |
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#4 | |
Waffles - hmmm good
Join Date: Aug 2008
Location: Huntersville, NC
Posts: 757
Rep Power: 0 ![]() |
Quote:
comon off the shelf parts that any parts store would have. Also most of it can come from the junkyard at a substantial savings ![]() or J105 igniters being found and the TFI coils really pack a good punch. I would like to say that it is all inspired by Jeffs previous work and I just took that another step further. Except in rev limited applications (read boost) the trailing is really not needed if you have a strong wasted spark ingnition setup. So I agree with that sentiment for sure.
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1980 GS stockport, Fat Nikki, RB Dual Facetfuel pumps, Holley regulator, RB Street port exhaust, 2GDFIS, MR2 MK I electric fans, 2G strut bar, relayed fans, lights and fuel pump, LEDs Project Fat Nikki Budget 12A rebuild Video setup < $30.00 |
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#5 |
Test Whore - Admin
Join Date: Mar 2008
Location: Right Behind you son
Posts: 4,581
Rep Power: 10 ![]() |
Loosen your panties and give me a few weeks there T, Pick which ever unit gives the best torque from my test. Remember I'm testing
Stock FC Stock FC with MSD Box (waiting on a loan) Stock FD Stock RX8 (waiting on Bill ![]() LS1 LS2 (If someone can donate) Merc Marine inductive Merc Marine CDI with an M&W box Bosch COP converted to a standard unit. My guess is the Bosch or the Merc Coils will come out on top. For the type of power that you're looking for, I think inductive is going to be the way to go but the dyno will tell all, well, almost all.
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-The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. -Angry Motherf*cker Mode ENGAGED- |
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#6 | |
RCC Loves Me Not You
Join Date: Jul 2008
Location: Influx.
Posts: 2,113
Rep Power: 20 ![]() |
I can't tell if you're telling me to drop my panties for your benefit or for me to take a dump... Or maybe both?
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#7 | |
crash auto?fix auto
Join Date: Feb 2008
Posts: 816
Rep Power: 18 ![]() |
Quote:
I think an inductive system certianly has its limits, and it may be outperformed at lower power levels by adding a huge array of boxes.........but simplicity/cleanliness/power I believe are quite balanced with inductive. I'm as anxious as everyone to see the B2B results though. |
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#8 |
Can't.Make.Up.My.Mind.
Join Date: May 2009
Location: Murfreesboro, TN
Posts: 1,377
Rep Power: 18 ![]() |
i believe MoTeC has coil on plug set up that really has me interested. I know youre running haltech. but as far as clean goes that routes seems like it would be. plus MoTeC claims they have superb spark.
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#9 |
Test Whore - Admin
Join Date: Mar 2008
Location: Right Behind you son
Posts: 4,581
Rep Power: 10 ![]() |
Last time I spoke with MoTeC they were going to grab a few of the coils that I did and run a few tests. I don't know if they have or not yet. I'm planning on calling them and sharing my results.
If you're referring to MoTeC's Denso COP, it's the LS1 and I gotta tell ya, I woldn't use it on the rotary after what I went though. I don't think they're all that special especially after wet-fouling them while the car was idling ![]()
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-The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. -Angry Motherf*cker Mode ENGAGED- |
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#10 | |
Can't.Make.Up.My.Mind.
Join Date: May 2009
Location: Murfreesboro, TN
Posts: 1,377
Rep Power: 18 ![]() |
Quote:
Part number M DEN-580 to be exact
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'90 GTUs Stay up to date with my photography '06 Toyota Highlander Hybrid '10 Toyota Prius "Initial Success or Total Failure" |
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#11 | ||
Test Whore - Admin
Join Date: Mar 2008
Location: Right Behind you son
Posts: 4,581
Rep Power: 10 ![]() |
Quote:
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Aside from building wires and the loss of a few tempers, I don't really see any losses if they're kept close enough. I would suspect that running them inside would lead to more losses than anything just because of the length of the wires. The thing with the COP's is the mounting. Sure it can be done, but why? I think it would be easier to mount them on the frame rail or where the factory did and make some plug wires than try to mount COP's on to the rotary. Just my $.02 Yeah, D-580 LS1 coils, fuck those coils. Especially for you. You're going to be going for higher revs and those won't be able to handle duty cylce required. The LS2's might work, D585, but even those I'm not too sure about. I'm really hoping to get a set loaned to me, I should PM BHR about it, see if they'll help me out. I think the Bosch's that I'm using would be the best bet for you. Can be dwelled fully to 10k rpm with an acceptable duty cylce. You definaly don't want or need a CDI box though.
__________________
-The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. -Angry Motherf*cker Mode ENGAGED- |
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#12 | |
FUCK the fucking fuckers
Join Date: Mar 2008
Location: THE only Bay Area, Northern California
Posts: 3,172
Rep Power: 21 ![]() |
subscribed! Good thread...
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#13 |
RCC Loves Me Not You
Join Date: Jul 2008
Location: Influx.
Posts: 2,113
Rep Power: 20 ![]() |
Okay, then I think I shall do the bulk head setup--in the mean time I'm waiting on TTT's results so I know where to put the money down on the coils.
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The Official FC Radiator Thread My Project Thread: Cerberus CCVT Virginia Rotary Group |
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#14 | |
Test Whore - Admin
Join Date: Mar 2008
Location: Right Behind you son
Posts: 4,581
Rep Power: 10 ![]() |
Quote:
![]() water of course just meaning incredibly high combustion pressures and dense dense mixtures that require that type of energy to still jump the gap. Think of wet fouling the plugs. I would definately skip the bulkhead idea. I don't like long leads or leads that pass through go near so much metal. I would seriously think about mounting them where the stock trailing's went, or on the block, or on the shock tower. That's just me though.
__________________
-The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. -Angry Motherf*cker Mode ENGAGED- |
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#15 |
Respecognize!
Join Date: Jul 2008
Location: Δx = ħ/2Δp
Posts: 3,190
Rep Power: 21 ![]() |
im running LS1 type coils from Summit. Summit brand in fact (who knows who they contracted to) They appear to work fine, but honestly, with all the little problems i have with the car, i can't be sure. I have considered just going back to a hotter version of the stock coil.
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