Looking for cam settings recommendations. Built 2.0 10:1, with GSC S2 and T4 twin scroll gtx3582r gen2...

What settings would you recommend to increase spool?

Thanks again.

 

The GSC S2 intake cam already has a fairly tight LC of 107, so I would leave that as is. If you want to increase spool, I would retard the exhaust cam by 1-2 degrees at the cam sprocket. That will tighten the LSA from 110 to 108-106, which will quicken spool and fatten the midrange a bit, although it will likely make the idle a little more choppy.

 

Hi ted. Looking for opinion on cam choice and setting between S3 and Kelford 284HL for Evo8, built head, 2.0LR, 6466 T4 Twin scroll. plan to have max power on pump gas, rpm limit at 9k rpm.
Thanks

 

These are both very good cam sets. The S3 should be a little more streetable. I do not know if "built head" includes competent port work, but neither of these cams will deliver their full potential without a good port job, preferably a CNC port job.

 

Ted B, I hope you still active. Can you compare gsc s1 vs tomei poncam r 270 for fast spool 2.0 engine with gtx3071 please. And if you have experience what cam degree is good for tomei poncam r 270 and gsc s1.

thank you.

 

I am very much alive. These two cam sets look very similar on paper, but it is difficult to be precise because Tomei does not publish duration @1mm lift.

 

Ted, Tomei's cam cards on their website do have published 1mm figures: https://www.tomei-p.co.jp/cam_spec/4...2_evo4-8LE.pdf

 

I’m glad that you are well these days because of covid19. RS200 added the pdf document for tomei type r 270 cam card. Please give some advises to me. And if you quick cam gear settings for gsc s1 and also for tomei poncam 270, I will be happy.

 

It's been years since I looked at Tomei's data. These cam cards weren't always available online. The Tomei cams have a few degrees more effective duration (223/225 vs. 216/220) but Tomei's intake lobe centerline is two crank degrees advanced. All things considered, these sets are vary close on paper, and will likely spool and perform similarly if installed straight up 0/0 with a GTX 3071.

 

Hello Ted B, can I ask how much degree I can advance mivec with kelford 272 cams? On honda k20 engines with aftermarket cams if you full advance there is chance to hit the intake valves to pistons (specially with oem pistons) I think that on evo 9 engine there is no possibility but I don’t want to ruin my customer’s engine. Thank you.

 

Ted B, do you have any advice for tomei poncam 260 for stock 2.0lt engine with gtx3076 gen2. Thanks

 

The Tomei Poncam 260 is a short duration cam set with timing that is best suited for applications that retain the factory turbo. I would try retarding the intake 1 degree and retarding the exhaust 2-3 degrees to quicken spool and move power slightly away from low rpm. A cam set like GSC S2 is better matched to that combination and would make more power.

 

Hi Ted, the thread has been great reading - thanks for sharing your insights. I've tried my best to pick the mean on previous advice but factoring in the variables is a challenge , if you were able to provide specific advice I'd much appreciate it.

The build is a non-mivec 4G63T 2.2L, with Kelford 272TX cams, ported head, +1mm valves, stock frame Intense Turbo 5656 (BB) and 3.5" turbo back running e85. I'm most interested in early spool, wide torque and response, though the max rpm is 8000+, its a week ender / hill climber. Can I ask the cam settings would you suggest as most appropriate?

Best

G

 

Sorry, I almost missed this ...

The Kelford TX282 has a fairly mild 226/226 effective duration and LCs of 107/113 with LSA of 110. I like the 107 intake LC for this setup, but that LSA is a little wide. I would try tightening the LSA by retarding the exhaust 1-2 degrees. The idle will get a bit lumpier, but it should help spool and midrange torque.

 

Ted thanks very much for that, currently the exhaust is retarded by 2 deg, I wasn't had reason to believe it might have been changed since the last full tune several years ago. Sounds like we are probably on target - your consideration and advice is much appreciated. Have a great weekend