The bottom end of the newer block has been stiffened and has the stud girdle (which can be used on the earlier blocks). However I have been told by a Jeep Parts Man/Drag Racer that the later block is 40 lbs lighter than the early one. Change is in 96/97 year and my 99 block seems to have multiple bolt holes, including knock sensor hole threaded. My guess is the cylinder walls (and probably the rest of the block) is cast thinner to eliminate the weight. A knock sensor is not a necessity in a street (or Race) motor - If I had a 87 - 90 I'd use the Renix with sensor and later than 96 (OBDII) you need to keep the OBDII for emissions testing in many States.
Flatlander Racing Stroker Crank...
- Thread starter 5-90
- Start date
Root Moose
NAXJA Forum User
- Location
- ON, Canada
5-90 said:
I agree. In fairness, this is how they dumb the system down. Not just for the consumer but also for the inspector. Legislation by the dummies. 5-90, take a look around next time you are on campus. See all those completely clueless law and journalism students? They are the ones that will hold sway in the future as politicians, lobbyists and the media. Scary reality.
We don't have a visual inspection here per se, but if a vehicle was sold with a cat it has to have a cat. They couldn't care about the type of ECU as long as the numbers are met. More generalized I guess.
5-90
NAXJA Forum User
- Location
- Hammerspace
Yeah - don't forget the Econ guys that think they're taking a serious subject, and the PoliSci guys who think that their degree will be - perhaps - more useful than the family pix hanging next to it.
While DC may have managed to improve NVH with their later mods, some things can only be solved by the use of material (note the increased weight of the later block.) The fact that the later blocks have strengthening webs and "resonance elements" added does not necessarily mean that the cylinders would be able to handle being bored out +.125" - that's something that would have to be first checked, then tested. If I had a sacrificial block I'd try it - especially with the webbing and mains cradle added. If I could get away with it, I'd look into having one-piece mains caps made (might have to do that meself one of these days. Sounds like an investment casting job...)
"An engineer is a man who can do for one dollar what any other man can do for ten." There's nothing wrong with engineering in its pure form - it's when you get accountants and attorneys involved that things get screwy. If product liability would be treated properly, for instance (you misused it, so you don't get anyhing!) we'd see some serious design improvement that was there all along - just that some lawyer suppressed because "someone might sue us." Ditto beancounters - while saving a few cents on a part over a production life of millions might add up, I'd sooner spend the money to turn out something more reliable (but I'm cranky.) "Your job is to keep track of my beans, not tell me what to do with them!"
5-90
While DC may have managed to improve NVH with their later mods, some things can only be solved by the use of material (note the increased weight of the later block.) The fact that the later blocks have strengthening webs and "resonance elements" added does not necessarily mean that the cylinders would be able to handle being bored out +.125" - that's something that would have to be first checked, then tested. If I had a sacrificial block I'd try it - especially with the webbing and mains cradle added. If I could get away with it, I'd look into having one-piece mains caps made (might have to do that meself one of these days. Sounds like an investment casting job...)
"An engineer is a man who can do for one dollar what any other man can do for ten." There's nothing wrong with engineering in its pure form - it's when you get accountants and attorneys involved that things get screwy. If product liability would be treated properly, for instance (you misused it, so you don't get anyhing!) we'd see some serious design improvement that was there all along - just that some lawyer suppressed because "someone might sue us." Ditto beancounters - while saving a few cents on a part over a production life of millions might add up, I'd sooner spend the money to turn out something more reliable (but I'm cranky.) "Your job is to keep track of my beans, not tell me what to do with them!"
5-90
krakhedd
NAXJA Forum User
- Location
- Buffalo, NY
I had hoped their influence would be contained within the West Coast......apparently it has spread beyong US borders........God help us!!! (PLEASE!!!!!:smoker::cheers: :banghead: :explosion 
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