houstonrx8er

iTrader: (8)

I guess I dont understand what you mean "issues do to dwell settings"...this is adjustable in APT? We have several FI cars running BHR with no issues

9krpmrx8

iTrader: (46)

BS, sounds like a tuner issue. I have had my BHR kit for years (5-6 years), both NA, nitrous, and turbo, zero issues.

Brettus

iTrader: (2)

Tuner/install issue more than likely . But I have heard of several BHR coil issues on FI cars that have only been resolved once BHR have replaced the coils .

9krpmrx8

iTrader: (46)

Yeah a certain amount of coils are certain to fail prematurely. Locally we have been real lucky, I have installed a dozen or so kits that I can recall and I can only think of one coil issue and it was resolved quickly and painlessly by BHR.

yomomspimp06

same here. I had an issue that Charles squared away for me. One Coil burned out. I still have no idea why.

skc

No problem with the coils.

In a FI car they need dwell adjustment and the person that purchased the kit from me was not able to get his tuner to adjust the dwell settings.

Local tuners in Brisbane, Australia have not come across a FI car with BHR coils so they are not familiar with the adjustments that are required.

skc

Fuel economy was dropping so I cleaned the air filter and now getting 250 miles out of a tank.

My K&N air filter sits behind the bumper and it is quite cramped so I moved it forward slightly towards the headlight so it now sits in a gap where it will get more air.

This slight change has now caused a slight hesitation when I step on the throttle. I think this issue will be resolved my moving the maf slightly closer. I am sure there is a optimal distance of filter to MAF. I know having it too close gave me major headaches with engine start up and it could not hold idle until it warmed up.

The tune up I did last month by replacing ignition parts and water decarb helped a lot and the runs very smoothly through the rev range all the way to the buzzer.

TeamRX8

iTrader: (25)

The dwell settings are different than timing settings, but for maximum plug firing power should the same for a particular coil regardless if NA or FI

The dwell settings required for the D585 coils is different than OE. The OE dwell will not provide enough power to the D585 coil at higher rpms and low starting voltage values, especially for boost applications. Even BHR acknowledged this early on for FI (misfires), though the settings they offered at that time for the Cobb software were incorrect.

Here are known good recommended settings if you need them:

https://www.rx8club.com/series-i-eng...8/#post4311570

The top map shows the values to be input into the OE software map. The bottom map is the resulting actual dwell in mS units.

Otherwise coils are coils. Though the quality may vary, there is no magic or Holy Grail effect because you got them from a particular vendor. All manufacturers/suppliers have some level of quality issues/defects regardless.

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9krpmrx8

iTrader: (46)

Yes, I am aware that the dwell needs to be changed, what did I say that made you think otherwise? All I said is it is a tuner issue and not a problem with coils. I realize coils are coils, I just prefer the BHR kit because I have had mine for years without issues, NA and FI. Same for a number of other locals so I can only go from that experience and the bad experiences I and others have had with OEM coils. If SKC is happy with OEM coils then cool, he is luckier than I was with them.

skc

I have the new version C coils so I am hoping it will perform well. As an added insurance I have run two 50mm flexible duct aimed directly at the coils to keep the heat at bay.

It will also provide cool air to the supercharger as well as the case gets quite warm.

The OEM coils have served me well as my power output is only a moderate gain and I do not have any intentions of chasing big power on a 12 year old OEM motor that has seen many track duties and won multiple trophies.

TeamRX8

iTrader: (25)

There are plenty of non-OE coil failures and they have nothing to do with the tuner. Just the same the comment served no purpose so I delete-edited it.



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WingleBeast

SKC, looking to go back to N/A. The constant leaks and issues are driving me nuts. Fixes don't seem to be as simple without a machine shop. Can't keep putting miles on the lease, I love my 8 too much to drive it so little. Guess I'll hold onto the kit if Danny can get the fixes correctly. Unless someone offers me what it is worth. But knowing the community I'll continuously get low-balled.

skc

Have you seen this thread https://www.rx8club.com/new-member-f...say-hi-250891/

This guy seems to have nailed the changes that needs to be made to the kit to resolve all the issues.

My car is my daily at the moment clocking up around 1000 km per month the only annoying things for me are the front pulley oil leak and the supercharger case oil leak. I am getting good vacuum and boost and excellent fuel economy.

Just took the car for a long run on a country road today and the 3rd gear acceleration from 90kmph to 130kmph was sensational as I blew past slow moving cars as I rode the all the way to the buzzer.

These drives reminds me why I love this car so much.

9krpmrx8

iTrader: (46)

I was following the webhop supercharger install site (now gone) and that guy seemed to really have his stuff together and after pulling and reinstalling it 3-4 times due to the same issues he finally gave up as well. For him it was just one leak after another. My buddy has one new in the box that has yet to be installed so we have been doing a lot of research and it's a tough call whether to tackle it or not.

WingleBeast

It is just such a pain to install and uninstall. You can't just snag one part, or check one seal.

I would love to go fix everything but I have decided that would require a complete redesign. I would weld the dogbone into the manifold and just have a pipe with silicone coupler to it. Literally cut the whole bypass off and do a traditional bypass on the supercharger exhaust. Unfortunately that requires some sort of pre-blower manifold which in the Hymee unit is only a 1/8th inch spacer between the throttle and plate. Also, having the lay-shaft submerged in oil (due to orientation) makes the front seal constantly leak, and there is no way to refill the oil in the super with it on the car, or and way to check the level.

Honestly I am going to give the mounting plate to my machinist to take measurements, then somewhere down the line do something on my own, just for me.

The constant chase doesn't bother me as much as each time I need to do a complete tear-down of the kit, which on my schedule is at least 3 free nights. So I am going without it for a week at a time. I already have a 85 RX-7 I'm restoring, I don't need this.

skc

All the issues you mentioned have been resolved in the link provided in my earlier post. This guy clearly know what he is doing and has the tools to make the changes.

The extra bolts at the lower section where the leak originates has resolved the oil leak. Danny, of automotive Plus also commented on this being the cause of the oil leak as that area did not have any bolts and relied on sealant only.

WingleBeast

Just looked through that guys thread, looks nice. But to me is just a bunch of band-aids.

I think the best way would be to mount the blower the other direction, with the drive pulley directly attached to the gear side. Then get a U-joint with an actual intake pipe. That would eliminate so many oil and bypass problems. Obviously Hymee was fighting overall length, but you can do some creative things keeping the flow cross section similar.

TeamRX8

iTrader: (25)

Or you can come to realize and accept that ultimately SC is not the way to go on a 1.3 2-rotor engine due the additional parasitic engine stress load required to accomplish a given at-the-wheel power level.



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WingleBeast

This was never about the most effective or power achieving method Team, but thanks for the input.

skc

The parasitic load is a non issue as it would be similar to running a a/c compressor or power steering system.

If we compare power levels of a 8PSI turbo to a 8PSi supercharger you will find that power levels are very similar.

Comes down to personal preference.

TeamRX8

iTrader: (25)

skc

Ha ha, what I meant is that it is not a significant HP loss as the same could be said for turbos as they can limit the exhaust flow.

At the end of the day both systems seem to deliver similar overall performance with a slightly different power curve

TeamRX8

iTrader: (25)

If you overlook that most of the people here are stuck on 1990 turbo technology, poorly funded, or poorly executed attempts.

skc

Maybe you need to jump on the FI bandwagon and show how its done

TeamRX8

iTrader: (25)

Eventually, in the meantime search on RX7Club.