[McBobby Jr]

     Featured on BIMMERPOST.com

It looks like Kelford Cams made a post on Instagram on a G20 M340i making some gains with their stage 2 cams. They stated in their caption that gen 1 cams are a few weeks away meaning a release is soon. Anybody been eyeballing them, a few of the really fast supra guys are running them. But I’m really interested to see what they can do on a stock motor setup and how the power band changes.

[MTWO]

BM3 will be putting them on their gen2 b58 Z4 soon as well. I’m really looking forward to those results as its a big turbo car

https://f30.bimmerpost.com/forums/sh....php?t=2011198

[Jnat]

This is exciting and would be nice!

[blacksapphire440i]

Following

[pauli18c]

51 horse, is that on a completely stock motor??

[McBobby Jr]

Originally Posted by MTWO

BM3 will be putting them on their gen2 b58 Z4 soon as well. I’m really looking forward to those results as its a big turbo car

https://f30.bimmerpost.com/forums/sh....php?t=2011198

That should be interesting, that build is insane. 1200+whp will be easy with cams and a 7675 Precision turbo.

[McBobby Jr]

Originally Posted by pauli18c

51 horse, is that on a completely stock motor??

Not much info on the post, so I did look around and found that the tuner made a post on the exact same car a few months back. It looks like it has a stock motor, but I’m unsure. It’s also running a Pure 800 and port injection so it should be making some steam off the bat. But I’m unsure if the cams have been the only thing that have changed since than.

[blacksapphire440i]

Originally Posted by McBobby Jr

Not much info on the post, so I did look around and found that the tuner made a post on the exact same car a few months back. It looks like it has a stock motor, but I’m unsure. It’s also running a Pure 800 and port injection so it should be making some steam off the bat. But I’m unsure if the cams have been the only thing that have changed since than.

Cams on a hybrid setup or a stock turbo (full send) setup alone would get you a solid 500-600whp on pump gas and 600-700whp on a hybrid with E

[McBobby Jr]

Originally Posted by blacksapphire440i

Cams on a hybrid setup or a stock turbo (full send) setup alone would get you a solid 500-600whp on pump gas and 600-700whp on a hybrid with E

It’ll be awesome to see the results when more people start adding cams to their build. I’m excited to see what cams can really do on this platform, especially what changes will come to the power band. Cams are usually one of the biggest power adders and is a really common thing amongst a lot of the Import and Domestic cars. But with the German cars, you don’t really hear about anyone upgrading the camshafts on their build. I would’ve thought that with a lot of big power turbo cars this wouldn’t be the case. But what I’ve noticed with these cars, is a lot of the power is in the lower/mid range and the torque usually starts to fall off right after where the power and torque meet in the early 5252 rpm sweet spot. But on big turbo cars torque starts to really fall off after 6000 RPM and horsepower is usually steady but goes no higher. I would’ve thought this wouldn’t be the case with big turbo cars, but the emphasis on the decreasing torque curve gets worse. This is probably why there isn’t any B58 pushing past 7000 rpm.

[MTWO]

Originally Posted by McBobby Jr

That should be interesting, that build is insane. 1200+whp will be easy with cams and a 7675 Precision turbo.

They could have done that on the 7275 easily if they didn’t do it on that 3” downpipe. Especially with cams even that same turbo it would have been 1200+ for sure. With a 7675 and cams that thing will go 1300+ I’m sure. Absolutely bonkers!

[B58]

I bet it’s more fun swapping out cams on a gen 1

[McBobby Jr]

Alright, great news. Kelford has finally released camshafts for GEN 1. They made specific versions for GEN 1 (July 2017 and earlier) and GEN 1.5 (August 2017 and later). There are 3 stages available, with their stage 1 supporting 550-750 hp, stage 2 will support 750-1000hp, and stage 3 up to 1200+ horsepower. Cost is the same across all stages. All the camshafts will require a retainer upgrade which Kelford also makes specificly for GEN 1. They even made a sheet to help select the correct camshaft for the specific build date of your B58. No dyno sheets or specified power increase stated by Kelford. I’m aware Skunk2 Racing is currently developing camshafts for the B58 (unsure about GEN 1) so it’ll be interesting to see how they’ll compare to each other once Skunk2 Racing releases their camshafts. This is really gonna help push the platform, and hopefully we’ll see more engine upgrades and potentially more camshaft upgrades coming to the market.

[McBobby Jr]

GEN 1 B58 camshaft chart by Kelford Cams

[McBobby Jr]

I’ve been trying to do research on these cams, and cannot really find anything. Even though they’ve been out for 3 years for GEN 2, I’m looking around on the mk5supra forum and still can’t really find anyone using these cams. I think the only guys using them are some of the big power supra guys running sub 9 second 1/4. The only thing I could really find online regarding these cams was this [TECH TALK] on YouTube by HP Academy. https://youtu.be/eOm4kr018I4

[blacksapphire440i]

Originally Posted by McBobby Jr

I’ve been trying to do research on these cams, and cannot really find anything. Even though they’ve been out for 3 years for GEN 2, I’m looking around on the mk5supra forum and still can’t really find anyone using these cams. I think the only guys using them are some of the big power supra guys running sub 9 second 1/4. The only thing I could really find online regarding these cams was this [TECH TALK] on YouTube by HP Academy. https://youtu.be/eOm4kr018I4

These will for sure provide a 20-40whp gain depending on how you tune the cams to be and how aggressive they are (stage 1-3)

[McBobby Jr]

Originally Posted by blacksapphire440i

These will for sure provide a 20-40whp gain depending on how you tune the cams to be and how aggressive they are (stage 1-3)

I'm more so curious about how the power band is affected than the power increase. Or perhaps how the power band could change depending on the specific stage cam you choose. I'd definitely be leaning towards the cam that improves upon top end horsepower and torque even if the lower and mid range suffer slightly.

[kern417]

Originally Posted by McBobby Jr

I'm more so curious about how the power band is affected than the power increase. Or perhaps how the power band could change depending on the specific stage cam you choose. I'd definitely be leaning towards the cam that improves upon top end horsepower and torque even if the lower and mid range suffer slightly.

more power everywhere for stage 1 and 2. tighter but higher powerband for stage 3.

[McBobby Jr]

Originally Posted by kern417

more power everywhere for stage 1 and 2. tighter but higher powerband for stage 3.

That makes sense, in that case I’d be really interested in the stage 3 cams. Hopefully we can get a sound clip of how these cams sound as well. Even just a start up would suffice.

[charlie fairmont]

This might be a dumb question but would cams be an engine out affair given the rear timing chain?

[McBobby Jr]

Originally Posted by charlie fairmont

This might be a dumb question but would cams be an engine out affair given the rear timing chain?

Not a dumb question at all. The engine does not need to be removed to install camshafts on the B58. However since the timing chain is in the rear, it will make the install more difficult. You will need specific tools to do the install and a good amount of time.

[McBobby Jr]

It seems these cams are doing well on the gen 2 side of the B58. Here’s a post by stimikey on the Kelford Cams. There are pretty big power gains across the whole power band on the stage 2 cam on this 1100whp Supra. He also stated this was done with no extra tuning, meaning there is still power left on the table.

[McBobby Jr]

New video by kern417 on the Kelford Cams https://youtu.be/bqGIw5hMMX4