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Corvette
C4 Forum
1988 Convertible for sunny day drives
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<blockquote data-quote="Tourmax" data-source="post: 179462" data-attributes="member: 5304"><p>Ah, this showed up today:</p><p></p><p>[ATTACH=full]32647[/ATTACH]</p><p></p><p>Corvette lower TPI intake.</p><p></p><p>Grabbed it for 50 bucks.</p><p></p><p>I wanted a manifold to weld, port and polish up that wasn’t the one on the car. That way the car srays in running shape until I’m ready to install the manifold and I can take as much time as I want polishing it.</p><p></p><p>Also allows me to go pretty heavy on the porting and if it gets messed up, I can toss it and only be out the 50 bucks and whatever time I woukd have into it.</p><p></p><p>Measured the ports and they come out to 1.70”, but if you go in just a little bit they neck doen to 1.40”. Plan is to open up the whole runner to 1.70”, maybe 1.80 or 1.90 with a little welding on the runner port roofs.</p><p></p><p>I plan to open up the port at the head transition as well. The manifold ports are smaller than the head ports and it makes a pretty sharp turn at the fuel injector bungs. Looks like I’ll have to weld to the runner tops and port them out from inside.</p><p></p><p>Once thats up to snuff, time to look at making bigger runners and sone upper plenum work.</p><p></p><p>Starting to look like the LT1 intake is going to go on the back burner...at least for a couple years. If I can get the TPI to 300-350 hp (crank, 250-300 RWHP) with some custom TPI fab, a cam and some tuning, the LT1 will probably never make it on the L98. </p><p></p><p>I really enjoy the way the TPI delivers power, but like everyoneelse, I just want more of it! </p><p></p><p>LOL!</p></blockquote><p></p>
[QUOTE="Tourmax, post: 179462, member: 5304"] Ah, this showed up today: [ATTACH type="full" alt="5FCBBA05-7E0A-4A38-80D7-98CB613D99CE.jpeg"]32647[/ATTACH] Corvette lower TPI intake. Grabbed it for 50 bucks. I wanted a manifold to weld, port and polish up that wasn’t the one on the car. That way the car srays in running shape until I’m ready to install the manifold and I can take as much time as I want polishing it. Also allows me to go pretty heavy on the porting and if it gets messed up, I can toss it and only be out the 50 bucks and whatever time I woukd have into it. Measured the ports and they come out to 1.70”, but if you go in just a little bit they neck doen to 1.40”. Plan is to open up the whole runner to 1.70”, maybe 1.80 or 1.90 with a little welding on the runner port roofs. I plan to open up the port at the head transition as well. The manifold ports are smaller than the head ports and it makes a pretty sharp turn at the fuel injector bungs. Looks like I’ll have to weld to the runner tops and port them out from inside. Once thats up to snuff, time to look at making bigger runners and sone upper plenum work. Starting to look like the LT1 intake is going to go on the back burner...at least for a couple years. If I can get the TPI to 300-350 hp (crank, 250-300 RWHP) with some custom TPI fab, a cam and some tuning, the LT1 will probably never make it on the L98. I really enjoy the way the TPI delivers power, but like everyoneelse, I just want more of it! LOL! [/QUOTE]
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Corvette
C4 Forum
1988 Convertible for sunny day drives
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