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gio_crf_tt

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About gio_crf_tt

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    Italy

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  1. gio_crf_tt

    Procom CDI Review

    Sorry for the delay, but have been busy travelling out of town for work (and away from the CRF). I eventually installed the Pro-com CDI (so overall my slip-on mods are: - Uncorked air-box; - Re-jetted (pilot 45, main 110, needle up one notch); - FMF power-bomb header; - Stock muffler with modded baffle (the Swiss-cheese type RM showed; I have added additional 3 mm holes on the area toward the engine side that's not covered by the silencer packing material, and also 4 x 3 mm holes (on the edge against the can) on the "plug" at the bottom of the baffle - bike is very quiet (haven't measured it yet, but going by the ears it sounds much like stock) and has (at least so it seems to myself) a decent gas flow. RM: have you played with the baffle? What do you think? The bike runs well, and has some pull at low-end and mid range: I guess it's as good as it can get without doing any other mods (at the moment I have no intentions of additional mods). I'll post some photos of the modded baffle later this week. Thanks Cheers Gio
  2. gio_crf_tt

    Procom CDI Review

    RM, You did all the posting work..so thank you. I'll report back on some little tweaking I want to do to increase the flow a bit keeping the noise as low as possible. Cheers gio
  3. gio_crf_tt

    Procom CDI Review

    Sorry about deviating from the topic...I'm a bit of a "geek" 😉...I get carried away by almost anything tech....
  4. gio_crf_tt

    Procom CDI Review

    I believe Decibel X Pro (paid) is superior to Noise Meter; however the limitation of using a mobile app is in the device hardware itself (microphone - even though some devices have microphone specs almost up to par); Noise Meter allows you to set sampling frequency and A-weighted filter. Expect an accuracy of +/- 2 - 3 dB.....so if your allowed target is 93 dB(A) max, your source, when measured with a mobile device app, should be around 89-90 dB(A) max - it's still an approximation, but you're probably close to a real measurement.
  5. gio_crf_tt

    Procom CDI Review

    There's an interesting study by NIOSH (NIOSH requirements on sound meter specs and accuracy definitely comply with SAE, ISO, IEC): https://blogs.cdc.gov/niosh-science-blog/2014/04/09/sound-apps/ You may also want to try this android app: Noise Meter by JINASYS (also mentioned in the NIOSH study).
  6. gio_crf_tt

    Procom CDI Review

    Decibel X is a fairly good app: the pro version has Frequency Weighting Filters - A weighted dB is what needs to be measured; besides it has also calibration features. What app are you using?
  7. gio_crf_tt

    Procom CDI Review

    You're welcome, my pleasure.
  8. gio_crf_tt

    Procom CDI Review

    This a more detailed explanation for "baffle tuning" (an sure you know that already) http://www.nightrider.com/biketech/exhaust.htm
  9. gio_crf_tt

    Procom CDI Review

    Will definitely do: while waiting for it to arrive, I'm trying to educate my self on what the best position for the solid plug could be; I think moving it towards the exhaust outlet side reduces noise level but decreases flow; also, based on this info: https://www.tabperformance.com/Reduce-Back-Pressure-Exhaust-s/203.htm I might try to tune the end cap either positioning at 45 degree angle, or making two tiny holes on it...honestly I'm not expert at all so I guess the only way to know is to try. Regarding the noise level measurement, 1 dB difference as measured in an uncontrolled environment (outdoors) and with a non calibrated device might not mean much: did you do background noise level measurements during your tests?
  10. gio_crf_tt

    Procom CDI Review

    Hi RedMesa. I actually have also the biker's choice baffle (I saw it on Rick Ramsey notes a while back and decided to give it a try): my experience is that it opens up a bit the exhaust, noise level is a little lower than stock muffler without any baffle, but still too noisy for me; hopefully the "Swiss-cheese" perforated baffle can" being longer and adjustable (it actually has a solid plug at the bottom, as opposed to the biker's choice) works better...I ordered it from China (that's what the e-bay listing said, but it was actually shipped out from Laos...) and waiting for it to arrive. On the FMF powerbomb: the FMF description says it lowers the noise level by 1 dB (and several users also seem to confirm that), but from your measurements looks like it increases it by 1 dB...that's strange, isn'it?
  11. gio_crf_tt

    Procom CDI Review

    Well guys....I'm sold on the Procom...yes, I want big smiles..... Thanks a lot: really appreciate your awesome feed-back. I'll order it and report back once installed (it'll come from the US, so it'll be a while...). Ciao giovanni
  12. gio_crf_tt

    Procom CDI Review

    Thanks a lot for the reply, bajatrailrider. OK, so the Procom CDI does something on a stock engine; my concern over the rev limiter is not that I'd be revving it up to the moon just for the hell of it (that'd be a little stupid, wouldn't it), it's just an engine safety concern in general: first I do not have a tachometer; and secondly, it can accidentally happen (such as in a fall or something like it) that the throttle gets out of control; anyways, Procom states there's a rev limit at 10000 rpm, and was just curious if anybody could confirm that. On the FMF pipe, reading some opinions (such as, among the others, from VortecCPI and Rick Ramsey, whom I have the highest respect for and consider most experts and reputable) I got the feeling the FMF header gives, even if minor, some improvements in the low mid - mid range (and helps reduce a bit the noise). I cannot ride withe stock muffler without the stock buffle: it's annoyingly noisy and would mean looking for troubles...how do you suggest modding the stock baffle to get some performance while keeping the noise down? I bought this guy here as well: https://www.ebay.it/itm/Universal-Motorcycle-Exhaust-Can-Muffler-Baffle-DB-Killer-Silencer-35mm-US-J4U0/282698122911?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 Once I get it I'll experiment to see if I can reach a happy medium - have you (or anyone on this forum) tried onee? Thanks a lot again, Sir. BR giovanni
  13. gio_crf_tt

    Procom CDI Review

    Hi Everyone; first post on this forum. I did not create a new topic since I have questions mainly relating to the Procom CDI (but also on other subjects discussed in here): if I'm not following the rules, please let me know. Little background info: I live in Italy, where I recently bought a Honda CRF 230 F my 2006 (at that time those bikes were branded and sold here as HM Moto; mine is the Easy Motard version). This bike serves several purposes in the house: my wife also uses it; we run errands with it, and from time to time we ride on country roads and very easy off-roads/trails; I'm middle aged, I've always had a passion for anything technical, including motorcycles, but I'm nothing like most of you, whom I consider super-experts and guru. I've done the few basic power-up mods; I'm not looking for any huge gains, I just want the bike to "breath" as it supposed to, while keeping the low maintenance and bullet proof reliability features: - Air box restriction removed; - Re-jetted: 48 piliot (tried the 45 as well); 110 main (also tried 115); needle up one notch - the bike seems to run decently, but I'm not sure jetting is dialed in 100% right (this my fault, due to lack of experience in carburation...); - Exhaust: since I also ride on streets and roads, I want the bike street legal and quiet, so I left the stock muffler, and I'm playing with one of those "Swiss-chees" perforated baffle cans to see if can keep stock dB level (93 dB) while getting some more flow (and keep some "back-pressure" for low-mid end torque, which is where I like to ride the most). OK, questions: - Procom CDI: given that over here they're more expensive than in the US (and perhaps other countries as well), I've found one for about Eur 60, which is fairly good (typically they run 1.5-2 times as much). Reading your opinion and impressions, it seems to really add some juice to low and mid range, however I'm concerned with the CDI not having rev limit at all....I contacted Procom and they said in written that the CDI is rev limited at 10.000 rpm, whereas some other people on the web say the CDI is a "killer", not having rev limit...What is your opinion on this? Not having a rev limiter scares the Hell out of me; on the other hand why Procom should state that the limit is 10.000 rpm, when that's not the case? - FMF header pipe: you guys say so many good things about it, that I started to look around, and found one at a relatively good price (they sell here for about 240-260 Eur, the one I'm looking at is Eur 180...); what's holding me back a bit is that the seller says the pipe will only fit the FMF slip-on. Reading TT posts seems that the FMF pipe fit perfectly with stock muffler, so is the seller just wanting to sell a full-system? Thanks in advance and keep the outstanding work. Best Regards Giovanni
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