downsides of '98 LS1 longblock
07-14-2005, 04:14 PM
#1
downsides of '98 LS1 longblock Looking to get a 98 LS1 engine to use in my car... I plan on getting forged rods and pistons and using the stock crank. I also have a set of LQ9 heads.
What are the downsides of the LS1 longblock? I hear the hear the block can't be bored out far enough to accept 3.905 pistons, is this true? I also know the LS6 intake is better. Any other downsides to the earlier motors?
What are the downsides of the LS1 longblock? I hear the hear the block can't be bored out far enough to accept 3.905 pistons, is this true? I also know the LS6 intake is better. Any other downsides to the earlier motors?
07-14-2005, 04:36 PM
#2
Individual coil packs bolted on the perimeter bolt valve cover's, vs. 99-02 using center bolt valve covers and a coil rail that then bolts to the valve cover. Not a big deal.
You'll need a 98 PCM and wiring harness specifically as the PCM attaches differently than other years.
98's came with 28lb injectors , and yes, get the LS6 or FAST90 intake.
Far as boring, not sure the 98 block is any different than the 99-01 LS1 blocks. Where did you hear that?
You'll need a 98 PCM and wiring harness specifically as the PCM attaches differently than other years.
98's came with 28lb injectors , and yes, get the LS6 or FAST90 intake.
Far as boring, not sure the 98 block is any different than the 99-01 LS1 blocks. Where did you hear that?
07-14-2005, 07:01 PM
#4
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You don't need a 98 PCM and harness. The only caveat to wiring it up is using a couple sensors from your old motor, specifically the oil pressure and water temperature sensors. You'd probably want to swap on your knock sensors as well, some 98's had a different connector on the harness, and the newer sensors are better anyway.
The 98's had a thinner sleeve that didn't tolerate as much of an overbore, but people HAVE gone .010" with them without trouble. The general consensus is to stick with a .005" overbore.
The 98's had a thinner sleeve that didn't tolerate as much of an overbore, but people HAVE gone .010" with them without trouble. The general consensus is to stick with a .005" overbore.
07-18-2005, 10:23 AM
#7
Thanks for the info guys... the overbore and wiring is what I was most concerned about!
Originally Posted by FastKat
Looking to get a 98 LS1 engine to use in my car... I plan on getting forged rods and pistons and using the stock crank. I also have a set of LQ9 heads.
What are the downsides of the LS1 longblock? I hear the hear the block can't be bored out far enough to accept 3.905 pistons, is this true? I also know the LS6 intake is better. Any other downsides to the earlier motors?
What are the downsides of the LS1 longblock? I hear the hear the block can't be bored out far enough to accept 3.905 pistons, is this true? I also know the LS6 intake is better. Any other downsides to the earlier motors?
