Supercharging - what else do I need? - LotusTalk - The Lotus Cars Community
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post #1 of 19 (permalink) Old 11-27-2017, 12:28 PM Thread Starter
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Supercharging - what else do I need?

I just bought a BOE300 supercharger kit that I (actually Jason Pannell) will be putting in this winter. I will be going with an ACT HD-SS clutch (not planning on going to a light weight flywheel) and replacing the stock radiator. I will have to replace the exhaust. Should I also go to a sport cat? I still have to pass emissions in Georgia (not as strict as CA). I don't want to send my ecu to Phil and then later make changes and have to get it redone.

Anything else that I should get/do? The car already has suspension and shifter upgrades (love the shiftr111 with Letsla!). I have been happy running EBC red stuff pads but not sure if they will stand up to faster speeds/heavier braking. I still drive the car on the street , so I can't go to track pads.

I think I just used more emoji in this message than I have in all of my other posts combined.
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post #2 of 19 (permalink) Old 11-27-2017, 12:48 PM
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Congrats on the purchase. One thing I would research is stiffer motor mounts. Start out with the yellow and work from there.
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post #3 of 19 (permalink) Old 11-27-2017, 12:52 PM Thread Starter
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Congrats on the purchase. One thing I would research is stiffer motor mounts. Start out with the yellow and work from there.
I have the front and back Sport inserts already. More vibration but worth it.
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post #4 of 19 (permalink) Old 11-27-2017, 01:12 PM
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I've passed three emissions checks in GA running a decat pipe. As long as there is no CEL (either from tuning it out or a O2 sensor spacer) the car will pass since they can't visually verify the presence of a cat due to the undertray.
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post #5 of 19 (permalink) Old 11-27-2017, 05:20 PM
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Did you install the shifter111 with the letsla at the same time? I have the shifter but not letsla yet.
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post #6 of 19 (permalink) Old 11-27-2017, 06:00 PM Thread Starter
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Did you install the shifter111 with the letsla at the same time? I have the shifter but not letsla yet.
I did the shiftr111, Letsla, and (fka) sector111 cables at the same time. Lotus should have done this to start with.
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post #7 of 19 (permalink) Old 11-28-2017, 06:18 AM
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I don't think running a sport cat is worth it (power wise). It WILL throw a code unless you run the sensor extenders. For a nice daily driver, I'd just stay with the stock cat... maybe even stock exhaust.
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post #8 of 19 (permalink) Old 11-28-2017, 06:23 AM
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I don't think running a sport cat is worth it (power wise). It WILL throw a code unless you run the sensor extenders. For a nice daily driver, I'd just stay with the stock cat... maybe even stock exhaust.
Yes.

My car was the first BOE had in the shop with stock exhaust, they said.

They may have been dubious.

But, after driving it, they thought it sounded very good, even pleasant.

Their intake makes a bit more noise and together, I really like the sound.


I drive a lot and didn't want a really loud exhaust, having had that on my Bugeye and Elan...

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post #9 of 19 (permalink) Old 11-28-2017, 07:19 AM Thread Starter
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Originally Posted by glagola1 View Post
I don't think running a sport cat is worth it (power wise). It WILL throw a code unless you run the sensor extenders. For a nice daily driver, I'd just stay with the stock cat... maybe even stock exhaust.
Thanks for the info. My car is mainly track and driving to/from the track, but some mountain drives or weekend cruises.

That is part of my question, will going to a sports cat or no cat be worth the $ for improved performance?
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post #10 of 19 (permalink) Old 11-28-2017, 07:25 AM
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Our sportCAT weighs less than stock cat and flows more. If you're tracking the car, our deCAT would be smarter long term solution.



A straight through muffler, like our sonicFURY will flow better than stock and certainly sound more wicked!

Rev match all of your downshifts to extend the life of your trans...
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post #11 of 19 (permalink) Old 11-28-2017, 08:52 AM
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Originally Posted by SS Lotus Elise View Post
Thanks for the info. My car is mainly track and driving to/from the track, but some mountain drives or weekend cruises.

That is part of my question, will going to a sports cat or no cat be worth the $ for improved performance?
On a canned BOE tune and with no supporting mods (built engine, high boost), I don't think you'd notice any difference from the seat of your pants... just a smell. If I had a street car still, I'd just be stoked with a REV 300 and good tires/shocks. Keep it quiet and nice. It's already raw enough. IMO.
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post #12 of 19 (permalink) Old 11-28-2017, 08:57 AM
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Definitely factor smell into the equation. The car will stink like an old farm truck with no cat and a rich tune.
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post #13 of 19 (permalink) Old 11-28-2017, 10:42 AM
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LSD -- won't be able to do donuts without it....
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post #14 of 19 (permalink) Old 11-28-2017, 12:02 PM Thread Starter
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Originally Posted by TachItUp View Post
Definitely factor smell into the equation. The car will stink like an old farm truck with no cat and a rich tune.
I did not know that. I spend too much time in the car driving to events to want a stinky car. Thanks for the tip. I will either stay with the stock cat or go to the sport cat.

I have the Larini exhaust now (which I will sell once the supercharger goes on), which I love the sound of when it is on cam or downshifted. I don't want stock quiet/restriction but I don't want race car loud either. I have to stay under 98 decibels for my local track.
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post #15 of 19 (permalink) Old 11-28-2017, 03:47 PM
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Sport cat is, IMO, a waste of $$.

On a NA Elise, removing the cat yields one just a few hp.

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post #16 of 19 (permalink) Old 11-28-2017, 05:38 PM
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Replace your thermostat. It is under the supercharger and should be replaced during any supercharger install. Having not done this on mine I've basically installed my supercharger twice.

Also I'd recommend getting a catch can, boe and radium make good ones.

Maybe the baffled oil pan? Depends on if you are tracking the car I don't have one yet so others might better advise on this.
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post #17 of 19 (permalink) Old 11-29-2017, 05:47 AM
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The stock cat is already a "sport cat", IMO... It's short and fat (not restrictive) and it has a ceramic core, which are all the recipe for what you want. I've yet to see an aftermarket cat that is better...

The stainless cores are total junk for these cars, so beware when buying.

As for power, there is no power to be found all the way to 300+whp by going to an aftermarket cat or decat for that matter if running the stock header. I have countless hours on our dyno to substantiate this.

If running the stock header, the only reason to go decat is if on track or you just prefer the sound and noise of one. The decat creates less heat in area you don't want heat and it's lighter, which are all better for track. The track is also tough on cats, so there's that...Outside of track, running a cat is the way to go and you're not leaving any power on the table. Also of note, the stock creates a secondary set of tubes to the cat with the internal divider. It's a pretty good part for what it is... If you blow out your stock cat, I'd try to find another stock cat if you're really compelled to run the stock header.

Now, if running aftermarket headers, then you will obviously be dealing with an aftermarket cat. Just be sure it's a ceramic core or you'll be wasting your hard earned dollars...


Cheers,

Phil
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Last edited by turbophil; 11-29-2017 at 05:55 AM.
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post #18 of 19 (permalink) Old 11-29-2017, 07:00 AM Thread Starter
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Thanks Phil, I was hoping you would chime in. I am trying to decide on everything before sending my tune list into you.
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post #19 of 19 (permalink) Old 11-29-2017, 08:23 AM
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Decats can be smelly, sure, but they tend to shoot f***ing fireballs out the back. Which is awesome. I think the hierarchy of cars goes:
1st - cars that shoot flames
2nd - everything else
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