We tested them against the tomei and the power was similar but the Jun hit earlier so I would still rather put the Jun 272 in the car

The Tomei 280 and the Jun 272 are very close though

Eric

I have a set here for my talon that I will be testing in the near future. I will keep you updated.

Eric

how do the jun cams compare to the tomei's? as far as flashed ecu and idle?

on a flashed ECU I would be a bit hesitant to run them. You really cant play around with Idle Characteristics on flash all that much and with the aggressive nature of this cam I would steer clear of it. The HKS 272's are perfect for that or possibly the Jun 264's once we can test them.

Eric

How would you compare the Jun cams to the Forced performance 3X cams?
I would love to see that back to back test!

eric what do you think of running one of the JUN cams on an evo 9 exhaust side?

please eric also keep me posted about the jun 272's for dsm's i have a buddy that is looking at them for his first gen, thanks

Could the jun 272's idle be controlled better with a piggyback such as the utec?

Ah, AMS is great. Always doing meaningful tests to really get the most power out of our cars.

Ive been itching to see some JUN 264 results. I know the JUN272 are way too aggressive for 95% of people out there, however for people like me who will sacrifice some idle quality for improved top-end, I think the JUN264s might fit the bill.

I think HKS 272s vs JUN264s on a basic flashed stock turbod car would be a great comparison. I know some people would want to see the HKS280 vs JUN264s also, especially idle vs idle and of course power. I cant wait!

I think the JUN264s will especially shine with kits like the 50trims which are making 450-500whp, which is where I think Ill be headed in the next year.

Thanks for doing the tests, Ill be sure to purchase them from you guys as my gratitude if it works out well. {thumbup}

The JUN 272s have a duration of 235 deg at 1mm, vs. 222 deg at 1mm for the HKS 280s. This is the reason why you simply cannot determine anything from gross duration numbers (e.g. 264, 272, 280, etc.). So, the JUN 272 cam set obviously has a longer effective duration than an HKS 280 cam set.

I'd like to know the lobe centerlines for the JUN cams, which are not posted on the JUN website. With this information, we can form a MUCH better comparison between JUN, Revolver, HKS, etc., simply because a significant portion of the differences are attributable to differences in cam timing, which fortunately, can be equalized via a set of cam gears.

Ted,how areyou with Japanese translation?I have the specsheets on these cams but it is so unfortunate that they are in Japanese,but from what I can figure out is quite possibly the Intake cam Centerline is 110 degrees and Exhaust is 115 (wow).I will double check with my Cousin in the coming days as he went to Japan for quite a few years and Taught English to Japanese businessmen and also learned to read and write in Japanese:)
BTW,these are from 272 Jun's Spec Sheets

Do you know the lift on these cams aswell. Like the FP 3x's are 414 lift on intake and like 390 exhaust?

I know the lift for the Revolver, HKS and JUN. I'm only missing the lobe centerlines for the JUN, which will help to clarify the picture somewhat.

If turbodan has the spec sheets, I can recognize the lobe centerline data when I see it. The 110/115 Int/Exh specs sound believable. That would mean that when installed straight up, the JUN cams are timed like the HKS set at 0/+2.5. The wider LSA would actually create a better idle, but the duration at 1mm for the JUN cams is so long that it will still give a very lumpy idle (as we've heard).

I guess all that high duration is good for the motors being spun upwards of 75-8000rpm, in which top end power through duration is greatly increased?

Here are some specs for comparison:


HKS 280
Duration: 222 deg @ 1mm lift Int / Exh
Lift: 10.8mm Int / 10.2mm Exh
Lobe Centerlines: 110 Int / 110 Exh

Revolver 262/264
Duration: 222 @ 1mm Int / 223 @ 1mm Exh
Lift: 11.4mm Int / 11.5mm Exh
LobeCenterlines: 109 Int / 111 Exh


JUN 272:
Duration: 235 deg @ 1mm Int / Exh
Lift: 10.8mm Int / Exh

Lobe Centerlines: 110 Int / 115 Exh