Lotsa questions regarding Ultima ignitions- Are they any good, are they Dyna copies, are they made in China, etc. Well I don’t know all the answers, but after ordering one from Jireh I did find out a few things- (Apologogies for the long post)Gryphon
- Jireh no longer lists the 53-642 in the catalog or their website. Maybe discontinued?Ricochet
- Read the rest of this first, I think I can answer your question at the end.
If you have the Jireh 2008 catalog, you can reference the catalog pages as well as the jireh website.
First of all, Jireh discontinued PN 53-60 (Module only p. 9/2), and 53-61 (complete kit, module, rotor, wires and coil p. 9/2) They were replaced with 53-644 (Module, $109.95 p. 9/3) and 53-660 (Kit, $149.95p. 9/3) Jireh claims that the 53-60 module was unreliable and they had a lot of returns. Anyway, the 2008 catalog and the website disagreed- the website lists the 53-644 as the entire kit. The 53-660 is not listed on the website at all (although you can order it by phone).
Second, is the Ultima a copy of the Dyna? According to Jireh, the Ultima module (53-644) is a clone of the Dyna 2000I (53-520 p. 9/20). Take a look at the picture, except for the writing, they do look identical. Another interesting note- in addition to the 6 dip switches used to set the modules up, both modules can be programmed using the same 53-646 Programming Software and PC Link ($87.95, p. 9/3 and 9/20). Yeah, I would say it’s a clone. The Ultima coil is a 2.4 ohm (primary resistance) coil. I believe the corresponding Dyna coil is the 53-591 ($119.95, p. 9/20). JIreh doesn’t provide the primary coil resistance value, and I couldn’t find any other specs on the coil. Interestingly, the Dyna 2000I is designed for “Designed for coil primary resistance of 2.5 to 3.5 ohms.” You can verify this on several websites, I included one for reference: (http://www.nrhsperformance.com/partsignition.shtml
Third, is the Ultima made overseas? According to Jireh, the Ultima is made by Dyna in California. I found no “MADE IN” designation on the unit or the packaging. The coil however arrived in a box clearly marked “MADE IN CHINA”. I still have no idea where the module is made.
Fourth, is the Ultima a reliable unit? According to Jireh, they have had no returns/complaints regarding the 53-644 module.
I haven’t installed the unit yet, although I may get around to it this weekend. I recently upgraded to a Woods W6 cam, and a Mik HSR42. I haven’t completed tuning the carburetor, and will install the ignition when I am done tuning. I have read a lot of posts on several forums regarding Ultima ignitions and have heard conflicting reports regarding their reliability. I don’t know if the negative reports were from the obsolete part number or not.Ricochet
- The Ultima 53-644 module set in single fire mode (Switch 6 ON). Rather than ordering the 53-660 kit (and have a Chinese coil you don’t need), you can order the 53-644 module by itself ($40 cheaper). According to the Ultima destructions, you can run “dual plug: use two DC2-1 coils wired in series (equals 3 ohms)”. DC2-1 coils are Jireh PN 53-393, $94.95 per pair p.9/18. Note that these are Dyna coils. I suspect you can use a pair of any 1.5 ohm coils. I don’t know if Ultima makes a DC2-1 clone. The 53-644 module instructions has diagrams of the various configurations, including the single fire/Dual plug set up you want to use.
Any comments or further clarifications would be welcome, and I will post again in the future after running the unit for a while.