Any experience with calculating these gains?
 

Engine:
Perrin crank pulley

Clutch:
Undecided, lightweight street clutch and flywheel

Driveshaft:
DSS or PST carbon fiber driveshaft

Fuel:
e85 and 91 tunes, likely with OpenTablet

Exhaust:
Borla UEL (sound profile, not max HP)
Perrin overpipe
Perrin catted front pipe
Invidia N1 exhaust

Wheels: (maybe)
Undecided, lightweight

Anybody have an idea what this shopping list might net me as far as HP goes? My overall goal is for the car to be more of what it already is... Just increasing how quickly it revs and allowing it to breathe easier... Overall, a more "peppy" car.

Header?

Search and read up on it

Headers over pipe and a tune will give you a solid 20whp. And cost less than your list.

Light weight battery and the aluminium ds would be good if shedding weight is a primary goal.

ah, forgot to include. going Borla UEL for the sound profile, just forgot to include. already done plenty of reading on options there :thumbsup:

Those items (besides header, which I just added because I forgot it) are part of the list already.

Carbon DS > Aluminum as far as weight goes, debating on the weight savings for the battery. i'm less concerned about overall weight loss, more about shedding weight in the rotational mass. :party0030:

The Driveshaft Shop driveshaft is lighter and cheaper than the PST. I'll definitely be going Driveshaft Shop once the time comes, unless someone can outdo them between now and then.

I've researched pretty deep into brakes, and the AP Sprint kit seems to be the best bang for the buck as far as weight and effectiveness are concerned. You can go a bit lighter than the Sprint kit, but you'll be hard pressed to have better functioning brakes if you go lighter, from what I've learned. They'll set you back ~$2,100, but it's a lot of unsprung rotating weight, and up front which is best for getting that 50/50 front/rear balance.

Oh, and for batteries, the two best that I know of would be:

4.96lbs - Shorai LFX36L3-BS12 - ~$350
3.90lbs - Super B 10P - ~$750

I'm actually considering dropping the $750 for that battery one day. Yeah, that's silly-expensive, but apparently it fully charges within 5 minutes of driving and lasts a really long time. Could actually be cheaper in the long run if it really does last as long as it's supposed to. And 3.9 pounds for a battery... http://www.elisetalk.com/forums/imag...lies/drool.gif

Is there any balance issue when we use lighter batteries?

Thanks.

Never mind I didn't read the post lol

Are you talking about the balance of the whole car? Such as front:back and driver's:passenger's sides? If so, it does effect the balance, but in a good way. Most of the weight is in the front of the car, so that's where the priority for weight reduction is.

It sounds like you already pretty much know your answer. You will probably get about 20-30 horse overall to the wheels, but with the rotational mass being much lower, the car is going to clime the RPM range MUCH quicker.

This is the rout I'm going as well. It may not be a horsepower beast, but it'll still be quick

PST Carbon Driveshaft - 13.9 lbs - $1100
DSS Carbon Driveshaft - 12.2 lbs $1000
DSS Aluminum Driveshaft - 13.2 lbs - $438
Axle Exchange Aluminum Driveshaft - 12.? lbs - $425

How is Carbon DS > Aluminum? Explain that one to me.

An extra $600 - $700 to save potentially 1 extra pound of ratational mass does not seem "better" to me. And the only reason I say potentially saving 1 pound is if you were only looking at the DSS. You could potentially save approximately 1 pound of rotational mass AND save $675 if your two options were PST and Axle Exchange.

Just food for thought.

How about the noise level of driveshaft between carbon fiber and Aluminum?

Thanks.

I doubt with these mods anyone would be worried about the noise level of adding a driveshaft.

Honestly, the aluminum shaft will be better for most people, as it has a lower max torque application than the 1200hp rated carbon fiber ones.

Sorry. I am off the topic. I am asking my case which still keep the stock

exhaust.

I am still debating should go with carbon fiber or aluminum driveshaft.

I read both product description.

http://ft86speedfactory.com/drivesha...t-at-1141.html

http://ft86speedfactory.com/drivesha...t-at-1142.html

I notice that the carbon fiber one mention " it will also make a noticeable difference on the noise level in the car", but the aluminum one did not mention this benefit which bring my concern.

Thanks a lot for your suggestion.

carbon fibre is a vibration damper, compared to an aluminum driveshaft you will feel less vibration from the cars various rotating assemblies, conversely aluminum is lightweight sure, but it can transmit vibration instead of absorbing it. NVH from stiffer bushings such as rear diff cradle and even subframe locks will be less noticeable with the carbon shaft. atleast in my experience. carbon is worth the cost IMHO.

Taken from another thread in regards to the aluminum driveshaft......

Will the carbon one slight increase in RWHP than aluminum one, due to

smaller diameter?

Thanks.

It won't increase HP so to speak. It only frees up power that was used to spin the extra weight in the factory drive shaft. That being said, the diameter doesn't matter so much as the weight does. The one with the lighter weight will not take as much power to spin as one with more weight. But the 1 pound give or take depending on the driveshaft with be almost negligible when considering the aftermarket options.

I checked the testing result which only 4Hp different.

http://theattack.rallysportdirect.com/2012/09/new-products-brzfrs-pst-carbon-fiber-driveshaft

Is there any benefit for the carbon fiber one? I heard that 350Z( or 370Z)

and GTR using carbon fiber driveshaft.

I will go with aluminum one, if there is no benefit from the carbon fiber one.

Which aluminum one you recommend (Axle Exchange or Dss)?

Axle Exchange wrote "This one piece 3" aluminum shaft saves you almost 17lbs !"

Does that mean only 7.2 lbs (24.2-17)?

http://www.axle-exchange.com/inc/sdetail/29/399

Thanks again.

Shorai is actually only $260. At least, that's what I paid from Amazon. Also does not absolutely require a special charger, either, according to the manual that comes with the battery. But if you do want to use the Shorai charger, it is a little over $75.

yeah i just wanted to get some confirmation :thumbsup:

In the Open Tablet thread, it looks like they picked up ~20 from the tune on 91 alone... i'm optimistically hoping for ~50 but before I do any binge shopping on parts I wanted to see if anybody else has gone this route. :party0030:

Here's my estimate, not sure how off-base it is, so corrections welcome:

Engine: ~2
Perrin crank pulley

Clutch: ~3
Undecided, lightweight street clutch and flywheel

Driveshaft: ~3
DSS or PST carbon fiber driveshaft

Fuel: ~20
e85 and 91 tunes, likely with OpenTablet

Exhaust: ~15
Borla UEL (sound profile, not max HP)
Perrin overpipe
Perrin catted front pipe
Invidia N1 exhaust

Wheels: (maybe)
Undecided, lightweight

I said as far as weight goes, for which you proved my point :thumbsup:

I did not claim that one was "better" than the other... No need to get the panties in a bunch. :happy0180:

Thanks for providing the weight of the other shafts, I was wondering about that. Cool note, if anybody is interested in the DSS shaft they have a nice video about their process and testing them as well!

Oh man, I didn't know the Axle Exchange one was that light. I'll have to look into that one.

The carbon fiber ones are rated for that much!? Last I saw, their limit was still unkown to the community. I can't remember specifically which one the thread I was reading was talking about, but holy shit, 1200hp?! Strange they rate it in horsepower and not torque, though.

Oh man! I was just going off Shorai's website. Didn't realize the savings elsewhere. And are you implying the Super B one will or might need a special charger?

Maybe @JRitt can give some insight on living with a Super B battery.

No panties in any bunch. I come off very direct at times I guess but was only trying to inform. I don't see how I proved your point though. Unless I read your statement incorrectly which is possible. When you said greater than (Carbon DS > Aluminum) I took that as you meaning the carbon was better than the aluminum. Did you mean that the weight of the carbon was greater than the aluminum? Meaning the carbon ds is heavier?

LOL @ reason for editing. Yeah, I don't remember what you had said, but I remember being confused by it, haha.

Haha op, I knew your sn looked familiar...I was on srtforums with you! Morgantj13 on there, with flame red srt.

Sorry for being off topic lol

Ill probably see you one of these days, I'm no longer in OC, but I'm up there a lot for work/family.

Best I could find was $300 shipped.....

Looks like the best option for someone daily driving.

@SPCorBUST you'll find those gains don't add up in a linear fashion. But rather diminishing returns.

20+15 will net 30-35

2+3+3 will net ~5

And the drive train stuff won't show even that on a dyno. But you will get some of those returns back in total weight lost.


I haven't done much with this car but I had about 10k into my wrx and they weren't spent without lots of research.

I ended up with about 70whp gained after all that. If you added it all up from website claims I'd have a 400whp monster which is impossible on a stock turbo wrx.

I think I've had my Super B in my Miata for about a year now maybe. I drive the car occasionally. Much of the time it just sits covered in the back of my driveway. It starts on the first crank every time. It works perfectly. I've never had the battery drain, and I have never needed to recharge it. To be honest, I pretty much forgot I even changed it out!

ha, I know your sn there as well. nice to see another owner made the jump! i'm still cruising on that forum :thumbsup:

if you're up on a tuesday we can stroll through the Irvine meet, if you're up on a Thursday some of the other OG's meet at the Sonics in Fullerton. :party0030:

Well I posted this for context:

"Carbon DS > Aluminum as far as weight goes"

If a manufacturer makes both it looks like the CF ones are lighter... Granted I ignorantly made this comment about the DSS axle comparison only.

I just searched for an Axle Engineering thread and found one on the forum if anyone is interested.