I was in the junkyard getting the exhaust cam from a 1991 Grand Am and noticed that it had a dual timing chain in it. I was wondering if it's a possible swap for the 2.4L LD9? The timing gears would abviously work, but I was wondering about the rest or the routing, if there was room for it and if the crank gears were interchangable?
Failure is not failure if you learn from it
before i answer your question i would like to ask ..why would you want to go from a single timing chaing to a larger,HEAVIER chain..in which there would be no performance gain at all but rather would create more drag on your assembly and completely offset any lightweight pulleys or mods you have done ...???
Much stronger, for use in higher horsepower/turbocharged setup. Just thinking it would cuz i've heard that the chains like to stretch at hi HP/RPM's. I dont really think it would offset the weight that bad, especially if you have everything balanced professionally. Just seems more durable.
Failure is not failure if you learn from it
stronger..possibly...needed? doubt it....i havnt seen many timing chain problems on tc engines..but lets put it this way..im building the 2.6 stroker and i threw out my double chain for the single to lighten the load and help rev faster.
I just picked up a dual chain assembly
brand new
Probably going to put it on one of my LG0 motors. I'm kinda dissapointed your not using the dual row Scott..... being its a stroker, its not going to be a high reving engine, so I'd rather go with strength over light weight. The chain might not be the weak link with the smaller setup, but that crank gear sure is.
To put it on the LD9, you would need to figure out how to use the dual row gear for the water pump...... and possibly use the wider 2.3 housing for the chain to fit into..... also, 2.3 chain guides are different then the 2.4 chain guides.
SPD RCR Z -
'02 Z24 420whp
SLO GOAT -
'04 GTO 305whp
W41 BOI -
'78 Buick Opel Isuzu W41 Swap
I would think the GM engineers knew what they were doing when they designed it that way from the factory just like the 2.3 oil pump and we all know how that worked out. The Quad4 H) made peak power at 6200 rpm and redlined at 6700 or 6800 and had bigger valves and stiffer springs than the tc, also the tc makes peak power at 5000 rpm and redlines at 5600 rpm much lower than the HO that's why GM could get away with a single chain on the 2.4.
I'm absolutely going to use one on my 2.3/2.4 hybrid for those very reasons and I'm going to be using W41 or bigger cams and expect a redline of close to 8000 rpm.
2000 Z24 5spd header & catback for now.
..... um how does that explain why GM went to single row in 1992 LG0/LD2?
that said, i like the 2 row chain...... it just is cool!
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
Quote:
I'm kinda dissapointed your not using the dual row Scott..... being its a stroker, its not going to be a high reving engine, so I'd rather go with strength over light weight
you just answered it for me...not a high reving machine..but just like you add light pulleys and light flywheels to rev faster the lighter chain will help me get to my power band faster...remember,the 2.4 crank is lighter than the 2.3..and so is the timing chain..add that to my fidanza flywheel,crank pulley,ac delete etc ..i should be able to rev just as fast as before if not faster..even though i increased the stroke
