I've read the Tech Manual dozens of times to try to make sense of these, and even looked them up on Sarna.net for clarification, and I STILL don't see anything that clearly states the exact numbers used by these jump jets.
In the Tech Manual (p.225-226) it says: "A modern refinement upon the centuries old design of standard jump jets, improved jump jets are twice as large and as heavy as their normal counterparts, but can propel a 'Mech further with less heat build-up. of widespread deployment. However, even as of his writing, scientists working for Phelan Kell’s exiled Wolf Clan were working on perfecting a more powerful jump jet system, designed to carry ’Mechs farther and with less heat build-up per jump. The first of these functionally improved jump jets finally reached the battlefields in 3069, and the specs were shared with the Lyrans, Draconis Combine, FedSuns and even ComStar—in the effort to provide any edge over Blakist assault forces. Curiously enough, the Crusader Wolves also fi elded improved jump jets on some of their ’Mechs in 3069, with a few reportedly deployed in their offensives against Falcon-held worlds. This spontaneous appearance may have been the result of Watch agents in the Exiles’ midst, to which Khan Kell may or may not be turning a blind eye during the current crises. –EB]"
Despite the interesting fluff for Improved Jump Jets, no clarification is given or actual numbers ever listed on exactly how much farther or how much less heat is involved.
On Sarna.net it says: "A modern refinement upon the centuries old design of standard jump jets, improved jump jets are twice as large and as heavy as their normal counterparts, but can propel a "Mech further with less heat build-up"
Again, NO clarification or exact numbers on how much farther or how much less heat is involved. Just a restatement of the fluff from the Tech Manual.
Exactly how much farther do Improved Jump Jets propel a 'Mech, and with how much less heat per jump?