Kraftwerks Supercharger Owners Thread - Page 235 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

jflogerzi · 04-25-2015, 02:02 PM

Sweet! Really like this kit and it being carb legal....

Barbas · 04-26-2015, 11:53 AM

Sorry, sure its been asked a few time but don't want to go through all the thread. I have the c38, 550cc injectors, and running e85. My question is to get to 350whp what will it take. Everything else in car is stock. Have yet to dyno it.

SPCorBUST · 04-26-2015, 12:07 PM

Quote:

Originally Posted by Barbas

Sorry, sure its been asked a few time but don't want to go through all the thread. I have the c38, 550cc injectors, and running e85. My question is to get to 350whp what will it take. Everything else in car is stock. Have yet to dyno it.

You should be able to hit that easily

SPCorBUST · 04-26-2015, 12:09 PM

Quote:

Originally Posted by KraftWerks

GREAT NEWS Coming VERY SOON.
It's taken far too long but the wait is coming to an end!

(Orange Exhaust tip covers are so the CARB techs can connect to the sampling system as well as extract the fumes, gases out of the building. Also have the hooks installed to keep the vehicle firmly planted on the dyno during the testing.)

We've been hearing this for over a year. When is very soon exactly?

jflogerzi · 04-27-2015, 10:46 AM

Quote:

Originally Posted by Barbas

Sorry, sure its been asked a few time but don't want to go through all the thread. I have the c38, 550cc injectors, and running e85. My question is to get to 350whp what will it take. Everything else in car is stock. Have yet to dyno it.

New clutch and a good tuner.

King Tut · 04-27-2015, 11:21 AM

Quote:

Originally Posted by KraftWerks

GREAT NEWS Coming VERY SOON.
It's taken far too long but the wait is coming to an end!

(Orange Exhaust tip covers are so the CARB techs can connect to the sampling system as well as extract the fumes, gases out of the building. Also have the hooks installed to keep the vehicle firmly planted on the dyno during the testing.)

@tahdizzle who loves CARB.

ATL BRZ · 04-27-2015, 01:01 PM

Another KW belt shredded by a Facebook user. Apparently in 1.5 months and 3k miles. Not affiliated just making sure yall are aware of the issues.

Triumphrider · 04-27-2015, 01:04 PM

Hmm I have 1k miles on mine now after installing it last month. I'm assuming the belt was not tensioned properly.

Freeman · 04-27-2015, 01:15 PM

Quote:

Originally Posted by ATL BRZ

Another KW belt shredded by a Facebook user. Apparently in 1.5 months and 3k miles. Not affiliated just making sure yall are aware of the issues.

Ian, he had over tightened it. Thank you for your concern for kraftwerks owners.

Triumphrider · 04-27-2015, 01:21 PM

Lol I'm in the garage snugging mine now as I was getting a bit of belt slap at start up

ATL BRZ · 04-27-2015, 01:22 PM

Quote:

Originally Posted by Freeman

Ian, he had over tightened it. Thank you for your concern for kraftwerks owners.

The owner is only guessing that it was too tight. He never mentioned where he had it or if he used the app to confirm it was within spec.

The owner just admitted he was not given a recommended belt tension by KW with the 90mm pulley he purchased from them directly. This makes me think KW didn't do enough (any?) track testing on their product to determine the recommended tension OR maybe KW's cogged pulley/belt design is fundamentally flawed due to the increasing number of broken belts as evidence.

No play = something has to take the force when you do a hard shift. Normal belt systems are intentionally designed to momentarily slip to release the energy. With KW, the belt has to take all that load, and it can only do it so many times...

Billion · 04-27-2015, 01:27 PM

I would assume the required belt tension would be the same no matter what size pulley you ran? Also if Rotrex themselves say cogged belts shouldnt be used with their blowers why do they warrant them through Kraftwerks?

Triumphrider · 04-27-2015, 01:30 PM

I started out with using recommended measurements, frequency, etc. Now I just snug enough so that I don't get belt slap at low rpm and call it good.

Coheed · 04-27-2015, 01:57 PM

I haven't seen too many cog belt designs for superchargers. I figure a 6 rib belt is sufficient for all the other accessories on the vehicle, including A/C. If the drive system were a dedicated 6 rib design, would it be able to handle the stress? All of the other systems utilize a standard serp-belt and operate just fine up to 300whp. After that, and I would probably carry an extra belt in the trunk.

I think it's strange the other KW supercharger kits use serpentine belts as well. Is there a possibility of a design revision down the road? On that would utilize a standard belt? Or even a timing-belt design that would be a little bit more available should a belt break?

Anyway, of all the kits I've seen I like this one the best overall. But I do have concerns about this belt drive system.

04-27-2015, 01:01 PM	#3283
ATL BRZ Driving Coach Join Date: Jun 2012 Drives: BRZ Location: Atlanta Posts: 3,666 Thanks: 3,723 Thanked 4,137 Times in 1,707 Posts Mentioned: 90 Post(s) Tagged: 6 Thread(s)	Another KW belt shredded by a Facebook user. Apparently in 1.5 months and 3k miles. Not affiliated just making sure yall are aware of the issues. __________________ __________________________Pure Motorsport: JDL Turbo BRZ Track Build_______________________

04-27-2015, 01:04 PM	#3284
Triumphrider Senior Member Join Date: Oct 2013 Drives: 2013 Scion FRS in white out Location: Cambridge, Ontario, Canada Posts: 261 Thanks: 141 Thanked 102 Times in 64 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Hmm I have 1k miles on mine now after installing it last month. I'm assuming the belt was not tensioned properly. __________________ 2013 Scion Frs AT in Whiteout, Borla UEL header, Greddy SP Elite AxleBack. Kraftwerks C38 Supercharger tuned by Moto East and 2 kid seats in the back.

04-27-2015, 01:21 PM	#3286
Triumphrider Senior Member Join Date: Oct 2013 Drives: 2013 Scion FRS in white out Location: Cambridge, Ontario, Canada Posts: 261 Thanks: 141 Thanked 102 Times in 64 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Lol I'm in the garage snugging mine now as I was getting a bit of belt slap at start up __________________ 2013 Scion Frs AT in Whiteout, Borla UEL header, Greddy SP Elite AxleBack. Kraftwerks C38 Supercharger tuned by Moto East and 2 kid seats in the back.

04-27-2015, 01:30 PM	#3289
Triumphrider Senior Member Join Date: Oct 2013 Drives: 2013 Scion FRS in white out Location: Cambridge, Ontario, Canada Posts: 261 Thanks: 141 Thanked 102 Times in 64 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	I started out with using recommended measurements, frequency, etc. Now I just snug enough so that I don't get belt slap at low rpm and call it good. __________________ 2013 Scion Frs AT in Whiteout, Borla UEL header, Greddy SP Elite AxleBack. Kraftwerks C38 Supercharger tuned by Moto East and 2 kid seats in the back.

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04-26-2015, 11:53 AM	#3278
Barbas Member Join Date: Nov 2014 Drives: 2013 whiteout Frs Location: stockton ca Posts: 12 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Sorry, sure its been asked a few time but don't want to go through all the thread. I have the c38, 550cc injectors, and running e85. My question is to get to 350whp what will it take. Everything else in car is stock. Have yet to dyno it.

04-27-2015, 01:27 PM	#3288
Billion Member Join Date: Nov 2014 Drives: 2013 Toyota 86 Location: Toowoomba, Australia Posts: 41 Thanks: 57 Thanked 18 Times in 9 Posts Mentioned: 0 Post(s) Tagged: 1 Thread(s)	I would assume the required belt tension would be the same no matter what size pulley you ran? Also if Rotrex themselves say cogged belts shouldnt be used with their blowers why do they warrant them through Kraftwerks?

04-27-2015, 01:57 PM	#3290
Coheed Senior Member Join Date: Jun 2012 Drives: DGM BRZ Limited Location: Seattle Posts: 813 Thanks: 209 Thanked 225 Times in 157 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I haven't seen too many cog belt designs for superchargers. I figure a 6 rib belt is sufficient for all the other accessories on the vehicle, including A/C. If the drive system were a dedicated 6 rib design, would it be able to handle the stress? All of the other systems utilize a standard serp-belt and operate just fine up to 300whp. After that, and I would probably carry an extra belt in the trunk. I think it's strange the other KW supercharger kits use serpentine belts as well. Is there a possibility of a design revision down the road? On that would utilize a standard belt? Or even a timing-belt design that would be a little bit more available should a belt break? Anyway, of all the kits I've seen I like this one the best overall. But I do have concerns about this belt drive system.

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