L98 ?'s
Thread Starter
Junior Member
Joined: Sep 1999
Posts: 73
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From: lawrenceburg,ky.
L98 ?'s
Does anyone know the safe maximum overbore on the L98 blocks,I have had several old style block bored .060 but I don't know about the L98's.
Also are the factory pistons cast or hyper?
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92 GTA(only 226 made)
ort matched sportsman heads with 2.05 valves,64 cc,milled .015,.028 head gaskets,port matched Accel runners,port matched plenum,port matched edelbrock intake,flow matched injectors,jet hot headers and 2.5" mandrel bent exhaust,Flowmaster muffler,underdrive pulleys,slp cam,1.6 rockers,slp cold air induction,52mm throttlebody,performance resource custom chip,Dyna module,Screamin Demon coil,Accel 8.8 wires,Bosch platinum plugs,timing at 10 degrees,tb bypass,relocated map sensor,shift kit,Fairbanks billet servo,pump vane kit & 2400 stall,Torque converter lockup switch,3.42 posi with welded axle tubes,Zexel Torsen HD diff.,Summit rearend girdle,solid pinion spacer,& alloy axles.Boxed panhard bar,lakewood lca's & edelbrock strut tower brace,Jeg's torque arm,Jegs welded in subframe connecters.Performance friction pads,turbo slotted front rotors,stainless braid brake lines.Roh ZT 17x8.5 front wheels with 255/40ZR/17 tires. 17x9.5 rear wheels with 275/40ZR/17's on the street.Hoosier 26x9.5 slicks on the strip.
Also are the factory pistons cast or hyper?
------------------
92 GTA(only 226 made)
ort matched sportsman heads with 2.05 valves,64 cc,milled .015,.028 head gaskets,port matched Accel runners,port matched plenum,port matched edelbrock intake,flow matched injectors,jet hot headers and 2.5" mandrel bent exhaust,Flowmaster muffler,underdrive pulleys,slp cam,1.6 rockers,slp cold air induction,52mm throttlebody,performance resource custom chip,Dyna module,Screamin Demon coil,Accel 8.8 wires,Bosch platinum plugs,timing at 10 degrees,tb bypass,relocated map sensor,shift kit,Fairbanks billet servo,pump vane kit & 2400 stall,Torque converter lockup switch,3.42 posi with welded axle tubes,Zexel Torsen HD diff.,Summit rearend girdle,solid pinion spacer,& alloy axles.Boxed panhard bar,lakewood lca's & edelbrock strut tower brace,Jeg's torque arm,Jegs welded in subframe connecters.Performance friction pads,turbo slotted front rotors,stainless braid brake lines.Roh ZT 17x8.5 front wheels with 255/40ZR/17 tires. 17x9.5 rear wheels with 275/40ZR/17's on the street.Hoosier 26x9.5 slicks on the strip. 
Member
Joined: Jul 2000
Posts: 181
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An L98 block is no different - other than roller lifters - than any other stock block. Always a good idea to have the cylinder walls sonic tested before you go .060 over. Its cheap insurance, especially in a performance application.
SC
SC
Thread Starter
Junior Member
Joined: Sep 1999
Posts: 73
Likes: 0
From: lawrenceburg,ky.
I made 1 pass & ran a 12.31,2nd pass the trans took a crap.I ordered a stage 3 kit from Pro Built,will try to shave some more time off next spring.
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92 GTA(only 226 made)ort matched sportsman heads with 2.05 valves,64 cc,milled .015,.028 head gaskets,port matched Accel runners,port matched plenum,port matched edelbrock intake,flow matched injectors,jet hot headers and 2.5" mandrel bent exhaust,Flowmaster muffler,underdrive pulleys,slp cam,1.6 rockers,slp cold air induction,52mm throttlebody,performance resource custom chip,Dyna module,Screamin Demon coil,Accel 8.8 wires,Bosch platinum plugs,timing at 10 degrees,tb bypass,relocated map sensor,shift kit,Fairbanks billet servo,pump vane kit & 2400 stall,Torque converter lockup switch,3.42 posi with welded axle tubes,Zexel Torsen HD diff.,Summit rearend girdle,solid pinion spacer,& alloy axles.Boxed panhard bar,lakewood lca's & edelbrock strut tower brace,Jeg's torque arm,Jegs welded in subframe connecters.Performance friction pads,turbo slotted front rotors,stainless braid brake lines.Roh ZT 17x8.5 front wheels with 255/40ZR/17 tires. 17x9.5 rear wheels with 275/40ZR/17's on the street.Hoosier 26x9.5 slicks on the strip.
------------------
92 GTA(only 226 made)
ort matched sportsman heads with 2.05 valves,64 cc,milled .015,.028 head gaskets,port matched Accel runners,port matched plenum,port matched edelbrock intake,flow matched injectors,jet hot headers and 2.5" mandrel bent exhaust,Flowmaster muffler,underdrive pulleys,slp cam,1.6 rockers,slp cold air induction,52mm throttlebody,performance resource custom chip,Dyna module,Screamin Demon coil,Accel 8.8 wires,Bosch platinum plugs,timing at 10 degrees,tb bypass,relocated map sensor,shift kit,Fairbanks billet servo,pump vane kit & 2400 stall,Torque converter lockup switch,3.42 posi with welded axle tubes,Zexel Torsen HD diff.,Summit rearend girdle,solid pinion spacer,& alloy axles.Boxed panhard bar,lakewood lca's & edelbrock strut tower brace,Jeg's torque arm,Jegs welded in subframe connecters.Performance friction pads,turbo slotted front rotors,stainless braid brake lines.Roh ZT 17x8.5 front wheels with 255/40ZR/17 tires. 17x9.5 rear wheels with 275/40ZR/17's on the street.Hoosier 26x9.5 slicks on the strip. Thread Starter
Junior Member
Joined: Sep 1999
Posts: 73
Likes: 0
From: lawrenceburg,ky.
SLP 218/224 duration,.495/.502 lift(with 1.5 rockers),114 LSA.I am using 1.6 rockers.
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92 GTA(only 226 made)ort matched sportsman heads with 2.05 valves,64 cc,milled .015,.028 head gaskets,port matched Accel runners,port matched plenum,port matched edelbrock intake,flow matched injectors,jet hot headers and 2.5" mandrel bent exhaust,Flowmaster muffler,underdrive pulleys,slp cam,1.6 rockers,slp cold air induction,52mm throttlebody,performance resource custom chip,Dyna module,Screamin Demon coil,Accel 8.8 wires,Bosch platinum plugs,timing at 10 degrees,tb bypass,relocated map sensor,shift kit,Fairbanks billet servo,pump vane kit & 2400 stall,Torque converter lockup switch,3.42 posi with welded axle tubes,Zexel Torsen HD diff.,Summit rearend girdle,solid pinion spacer,& alloy axles.Boxed panhard bar,lakewood lca's & edelbrock strut tower brace,Jeg's torque arm,Jegs welded in subframe connecters.Performance friction pads,turbo slotted front rotors,stainless braid brake lines.Roh ZT 17x8.5 front wheels with 255/40ZR/17 tires. 17x9.5 rear wheels with 275/40ZR/17's on the street.Hoosier 26x9.5 slicks on the strip.
------------------
92 GTA(only 226 made)
ort matched sportsman heads with 2.05 valves,64 cc,milled .015,.028 head gaskets,port matched Accel runners,port matched plenum,port matched edelbrock intake,flow matched injectors,jet hot headers and 2.5" mandrel bent exhaust,Flowmaster muffler,underdrive pulleys,slp cam,1.6 rockers,slp cold air induction,52mm throttlebody,performance resource custom chip,Dyna module,Screamin Demon coil,Accel 8.8 wires,Bosch platinum plugs,timing at 10 degrees,tb bypass,relocated map sensor,shift kit,Fairbanks billet servo,pump vane kit & 2400 stall,Torque converter lockup switch,3.42 posi with welded axle tubes,Zexel Torsen HD diff.,Summit rearend girdle,solid pinion spacer,& alloy axles.Boxed panhard bar,lakewood lca's & edelbrock strut tower brace,Jeg's torque arm,Jegs welded in subframe connecters.Performance friction pads,turbo slotted front rotors,stainless braid brake lines.Roh ZT 17x8.5 front wheels with 255/40ZR/17 tires. 17x9.5 rear wheels with 275/40ZR/17's on the street.Hoosier 26x9.5 slicks on the strip. 
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