Tomei KA24DE Adjustable Cam Gears - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Trap Star · 12-17-2019, 06:20 PM

Apparently they are offering these now. I'm considering going this route instead of the JWT gears but figured I'd see if anyone's already picked up a set and what their thoughts are.

https://www.tomeiusa.com/?p=15548

*brndck* · 12-18-2019, 08:26 AM

Quote:

Originally Posted by Trap Star

Apparently they are offering these now. I'm considering going this route instead of the JWT gears but figured I'd see if anyone's already picked up a set and what their thoughts are.

https://www.tomeiusa.com/?p=15548

if you're looking to get a set, contact BLUEMOON in costa mesa, they're an authorized Tomei dealer as well as the engine builder for a lot of FD, D1 drivers. @bluemoonperformance on IG
http://bluemoonperformance.com/

EnnEssEnnKAT · 12-18-2019, 07:35 PM

Isn’t tomei USA a spin off of the original tomei? I wonder what the quality difference is, that’s why tomei (og) drooped tomei USA to begin with :/

Sent from my iPhone using Tapatalk

Trap Star · 12-18-2019, 09:54 PM

Quote:

Originally Posted by EnnEssEnnKAT

Isn’t tomei USA a spin off of the original tomei? I wonder what the quality difference is, that’s why tomei (og) drooped tomei USA to begin with :/

Sent from my iPhone using Tapatalk

My main concern is whether or not the sliding adjustment is at risk of moving unexpectedly. At the same time that feature is pretty nice so long as it holds.

*brndck* · 12-19-2019, 06:27 AM

Quote:

Originally Posted by EnnEssEnnKAT

Isn’t tomei USA a spin off of the original tomei? I wonder what the quality difference is, that’s why tomei (og) drooped tomei USA to begin with :/

That’s a whole other discussion, but the cam gears have been in the works since well before the split. Originally, Tomei USA was just that. The USA branch of Tomei JP. Now they have parted ways and operate independently.

Quote:

Originally Posted by Trap Star

My main concern is whether or not the sliding adjustment is at risk of moving unexpectedly. At the same time that feature is pretty nice so long as it holds.

Ummmm that’s why there’s SIX bolts, just like any other slide cam gear from Titan or any other manufacturer. Hks only uses THREE bolts

tuzzio · 12-19-2019, 10:04 AM

Im interested in these as well, especially at that price point.

spooled240 · 12-19-2019, 11:15 AM

Quote:

Originally Posted by Trap Star

My main concern is whether or not the sliding adjustment is at risk of moving unexpectedly. At the same time that feature is pretty nice so long as it holds.

That's what I was thinking when I first saw the design. The bolts have less leverage in keeping things from moving on the small KA cam gears, but there are 6 of them. I'm sure it's fine, and adjusting them looks pretty easy.

spooled240 · 12-19-2019, 10:24 PM

So what are you all planning on adjusting with these? Less overlap?

Trap Star · 12-20-2019, 03:32 PM

Quote:

Originally Posted by brndck

Ummmm that’s why there’s SIX bolts, just like any other slide cam gear from Titan or any other manufacturer. Hks only uses THREE bolts

Hence my use of the word "unexpectedly". I would not expect that its going to move with 6 bolts but its still a possibility.

*brndck* · 12-23-2019, 01:53 AM

Quote:

Originally Posted by Trap Star

Hence my use of the word "unexpectedly". I would not expect that its going to move with 6 bolts but its still a possibility.

At that point, it’s operator error, not a flaw with the part.

Trap Star · 12-23-2019, 01:23 PM

Probably true but hard to say for sure without actually looking at them. Like I said, its my main concern but I also see it as an unlikely failure. I'd rather be over cautious than lose an engine.

S14rebuild · 12-23-2019, 02:27 PM

Tomei says-apply thread locker to bolts and torque specs are 7.8nm-9.8nm for the adjuster bolts

*brndck* · 12-27-2019, 08:53 AM

Quote:

Originally Posted by Trap Star

Probably true but hard to say for sure without actually looking at them. Like I said, its my main concern but I also see it as an unlikely failure. I'd rather be over cautious than lose an engine.

I don't get your point. People have been using slide cam gears for AGES, and as long as you tighten the bolts, its not an issue. Why is everyone so paranoid about these ones? Did I miss something?

SR20 tomei gears have 6 bolts and I've never heard of anyone having one come loose before.

spooled240 · 12-27-2019, 12:03 PM

There's just more forces involved with the smaller diameter cams sprockets on the KA. It's like when you're in a high gear on your bicycle. The chain is under higher stress under acceleration. It's most likely why Nissan designed the upper timing chain to be dual-row.

It's probably fine, but I'd be crunching some numbers if I had stiffer valve springs and a high-hp KA-T. I don't know, maybe I'm just paranoid.

12-17-2019, 06:20 PM	#1
Trap Star Zilvia Junkie Join Date: Jan 2008 Location: ATL/Sylva, NC Age: 33 Posts: 409 Trader Rating: (0) Feedback Score: 0 reviews	Tomei KA24DE Adjustable Cam Gears Apparently they are offering these now. I'm considering going this route instead of the JWT gears but figured I'd see if anyone's already picked up a set and what their thoughts are. https://www.tomeiusa.com/?p=15548 __________________ 86 300zx/90 240sx/97 240sx/96 LS400/03 350z -Shake N' Break Racing-

12-23-2019, 01:23 PM	#11
Trap Star Zilvia Junkie Join Date: Jan 2008 Location: ATL/Sylva, NC Age: 33 Posts: 409 Trader Rating: (0) Feedback Score: 0 reviews	Probably true but hard to say for sure without actually looking at them. Like I said, its my main concern but I also see it as an unlikely failure. I'd rather be over cautious than lose an engine. __________________ 86 300zx/90 240sx/97 240sx/96 LS400/03 350z -Shake N' Break Racing-

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12-18-2019, 07:35 PM	#3
EnnEssEnnKAT Zilvia Junkie Join Date: Sep 2014 Location: New Hampshire Posts: 427 Trader Rating: (13) Feedback Score: 13 reviews	Isn’t tomei USA a spin off of the original tomei? I wonder what the quality difference is, that’s why tomei (og) drooped tomei USA to begin with :/ Sent from my iPhone using Tapatalk

12-19-2019, 10:04 AM	#6
tuzzio Nissanaholic! Join Date: Oct 2013 Location: Western Mass. Posts: 2,254 Trader Rating: (3) Feedback Score: 3 reviews	Im interested in these as well, especially at that price point.

12-19-2019, 10:24 PM	#8
spooled240 Post Whore! Join Date: Mar 2008 Location: San Diego, CA Posts: 4,140 Trader Rating: (27) Feedback Score: 27 reviews	So what are you all planning on adjusting with these? Less overlap?

12-23-2019, 02:27 PM	#12
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,497 Trader Rating: (8) Feedback Score: 8 reviews	Tomei says-apply thread locker to bolts and torque specs are 7.8nm-9.8nm for the adjuster bolts

12-27-2019, 12:03 PM	#14
spooled240 Post Whore! Join Date: Mar 2008 Location: San Diego, CA Posts: 4,140 Trader Rating: (27) Feedback Score: 27 reviews	There's just more forces involved with the smaller diameter cams sprockets on the KA. It's like when you're in a high gear on your bicycle. The chain is under higher stress under acceleration. It's most likely why Nissan designed the upper timing chain to be dual-row. It's probably fine, but I'd be crunching some numbers if I had stiffer valve springs and a high-hp KA-T. I don't know, maybe I'm just paranoid.