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Corvette
C4 Forum
Witch year is the best L98 C4 ?
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<blockquote data-quote="Tourmax" data-source="post: 179818" data-attributes="member: 5304"><p>An LT4 grandsport is going to go for serious cash, or at least too much for the OP budget. If they're not already pushing ZR1 prices, I'll wager they will be soon. Great C4 though. Could have been an LT5 killer had they worked it up as far as it's potential would take it. Even stock, an LT4 can make and LT5 nervously look over it's shoulder and sweat pretty hard to stay ahead. Breath a little on an LT4 and I'll lay money on it being able to <em><strong>stomp </strong></em>a stock ZR1/LT5.....</p><p></p><p>LT5/ZR1 is going to command somewhere in the 20G CAD range, and that's just <em><strong>to start</strong></em>.... that's out.</p><p></p><p>The Callaway cars were monsters, made to fil the gap until GM could get the ZR1/LT5 off the launch pad. The engine itself wasn't much more than a production L98, it was the twin turbo's that made it a monster. Callaway's are like ZR1's; expensive as hell. Assuming you can find one for sale. That 248 mph was also with the "sledgehammer" Callaway. The Sledgehammer was mostly a prototype, they only built the one but everyone quote the sledhammer top speed for every Callaway C4. The "sledgehammer" had specially designed tires to run that record (reported cost 1 million to design them and they were supposedly good to 300 mph). "Normal" Callaway's got the conventional tires for the time, which were Z rated which limited you to 149 mph (240 KPH). Z rated is 149 mph, but they could go over. However, no manufacturer would say how much over or for how long you could run them over 149 mph. Still, for a street car, 149 mph is pretty much a useless number. You could do 149 on public roads, but someone should beat your ass silly if you did.....and then chuck you in jail. Those are track numbers and should only be explored on a closed track.</p><p></p><p>So, best L98 I would say is just about any of them from 88-1991.I'd stay away from the 86/87 L98 with aluminum heads , they were the design before the "D" shaped exhaust ports, which flowed much better than the early aluminum heads. Early L98 aluminum heads (86/87) were designed the same as the Iron L98 heads, so they had square ports, which flow less than the D ports.</p><p></p><p>Hmmm, maybe I know more about L98 C4 Vettes than I thought I did.......<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="Tourmax, post: 179818, member: 5304"] An LT4 grandsport is going to go for serious cash, or at least too much for the OP budget. If they're not already pushing ZR1 prices, I'll wager they will be soon. Great C4 though. Could have been an LT5 killer had they worked it up as far as it's potential would take it. Even stock, an LT4 can make and LT5 nervously look over it's shoulder and sweat pretty hard to stay ahead. Breath a little on an LT4 and I'll lay money on it being able to [I][B]stomp [/B][/I]a stock ZR1/LT5..... LT5/ZR1 is going to command somewhere in the 20G CAD range, and that's just [I][B]to start[/B][/I].... that's out. The Callaway cars were monsters, made to fil the gap until GM could get the ZR1/LT5 off the launch pad. The engine itself wasn't much more than a production L98, it was the twin turbo's that made it a monster. Callaway's are like ZR1's; expensive as hell. Assuming you can find one for sale. That 248 mph was also with the "sledgehammer" Callaway. The Sledgehammer was mostly a prototype, they only built the one but everyone quote the sledhammer top speed for every Callaway C4. The "sledgehammer" had specially designed tires to run that record (reported cost 1 million to design them and they were supposedly good to 300 mph). "Normal" Callaway's got the conventional tires for the time, which were Z rated which limited you to 149 mph (240 KPH). Z rated is 149 mph, but they could go over. However, no manufacturer would say how much over or for how long you could run them over 149 mph. Still, for a street car, 149 mph is pretty much a useless number. You could do 149 on public roads, but someone should beat your ass silly if you did.....and then chuck you in jail. Those are track numbers and should only be explored on a closed track. So, best L98 I would say is just about any of them from 88-1991.I'd stay away from the 86/87 L98 with aluminum heads , they were the design before the "D" shaped exhaust ports, which flowed much better than the early aluminum heads. Early L98 aluminum heads (86/87) were designed the same as the Iron L98 heads, so they had square ports, which flow less than the D ports. Hmmm, maybe I know more about L98 C4 Vettes than I thought I did.......:) [/QUOTE]
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C4 Forum
Witch year is the best L98 C4 ?
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