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whats your shift rpm? Spraying 200 plus on stock cubes really reduces the amount of air the intake has to pull in so if rpms are around 65-6700 I dont think the super would have much gain. And the jr is easier to fit in, assuming 4th gen
They don’t make cathedral intakes anymore, guess I should’ve specified that it was cathedral
Your doing a nitrous motor. Have CID send the intake to Induction Solutions and they will weld up the ports and shape them to port match the cathedrals. Then while its there, have them install a fogger on it. Or ICT Billet makes adaptor spacers that do need port matching but work good. We run cathedrals as well. You will need the LS3 4" CID intake to do this. Its 15 degree as well with tall ports to make it pretty easy to weld up and port match or use the adaptors. We gained 49hp and 67ft pnds doing just this on motor with the adaptors. If your injected you may want a 4.5" or 5". We run a carb so we stayed with the 4". Just realized you are at 347ci. Do a 4" with lots of room to port if you go larger. Our motor is a Dart 427.
Last edited by TTur1996; Oct 15, 2021 at 02:37 AM.
Your doing a nitrous motor. Have CID send the intake to Induction Solutions and they will weld up the ports and shape them to port match the cathedrals. Then while its there, have them install a fogger on it. Or ICT Billet makes adaptor spacers that do need port matching but work good. We run cathedrals as well. You will need the LS3 4" CID intake to do this. Its 15 degree as well with tall ports to make it pretty easy to weld up and port match or use the adaptors. We gained 49hp and 67ft pnds doing just this on motor with the adaptors. If your injected you may want a 4.5" or 5". We run a carb so we stayed with the 4". Just realized you are at 347ci. Do a 4" with lots of room to port if you go larger. Our motor is a Dart 427.
whats your shift rpm? Spraying 200 plus on stock cubes really reduces the amount of air the intake has to pull in so if rpms are around 65-6700 I dont think the super would have much gain. And the jr is easier to fit in, assuming 4th gen
i plan to spin it to 7500, it’s a 4th gen but I’m notching the cowl
Could run a btr equalizer and a plate kit with holley terminator x ecu. Just throwing that option out there Instead of cutting up the car. Otherwise, supervic for sure. You will have to cut a lot...
Could run a btr equalizer and a plate kit with holley terminator x ecu. Just throwing that option out there Instead of cutting up the car. Otherwise, supervic for sure. You will have to cut a lot...
We did that on a buddy’s car, the plate tapped out at a 250 shot
Unbolted a Super Victor with a XP 950 Holley and bolted on the CID with adaptors and a 1100 Pro Systems dominator. That is it. Fuel distribution on the CID is way good. That was with a mild quick port job on the adaptors. A year later we extensively ported the adaptors and picked up .37 in the 1/4 on motor only.
Last edited by TTur1996; Oct 16, 2021 at 03:40 AM.
Your doing a nitrous motor. Have CID send the intake to Induction Solutions and they will weld up the ports and shape them to port match the cathedrals. Then while its there, have them install a fogger on it. Or ICT Billet makes adaptor spacers that do need port matching but work good. We run cathedrals as well. You will need the LS3 4" CID intake to do this. Its 15 degree as well with tall ports to make it pretty easy to weld up and port match or use the adaptors. We gained 49hp and 67ft pnds doing just this on motor with the adaptors. If your injected you may want a 4.5" or 5". We run a carb so we stayed with the 4". Just realized you are at 347ci. Do a 4" with lots of room to port if you go larger. Our motor is a Dart 427.
Dont mean to hijack thread but I have the same combo and am looking for the same answer lol.
Which Flange do you guys go with 347ci ls1?? I have seen the dyno test done by __________ (Gonna omit name of company Non-Sponsor) on youtube on a ls3 and their test was with a 4500 flange and got the most power out of all intakes tested. I wonder if I go with the same 4500 flange would it be slightly better to my ls1 383 stroker than a 4150. What do you think ?
Dont mean to hijack thread but I have the same combo and am looking for the same answer lol.
Which Flange do you guys go with 347ci ls1?? I have seen the dyno test done by __________ (Gonna omit name of company Non-Sponsor) on youtube on a ls3 and their test was with a 4500 flange and got the most power out of all intakes tested. I wonder if I go with the same 4500 flange would it be slightly better to my ls1 383 stroker than a 4150. What do you think ?
Thanks for the input.
OP were you planning to go 4150 or 4500?
Im gonna go with a 4150, plenty for a small bore motor I believe
If you us a Ultra XP 4150 Holley. The base is set up to bolt on a 4500 or a 4150 flange intake. They call it a square bore dominator. You can get it from 650 to a 950.
Last edited by TTur1996; Dec 17, 2021 at 02:18 AM.
Curious about that one vs the CID, I think the Holley falls between the Super Vic and CID in height plus Holley comes with fuel rails and bolts right on for a good bit cheaper. Having to pay more for a CID and then send it to another company to make work doesn't sound like fun.
Originally Posted by tug686spd
whats your shift rpm? Spraying 200 plus on stock cubes really reduces the amount of air the intake has to pull in so if rpms are around 65-6700 I dont think the super would have much gain. And the jr is easier to fit in, assuming 4th gen
I don't see a point shifting that low and running a single plane intake.
Originally Posted by CamOnlyZ28
i plan to spin it to 7500, it’s a 4th gen but I’m notching the cowl
That sounds more like it, I take my Super vic past that.
Curious about that one vs the CID, I think the Holley falls between the Super Vic and CID in height plus Holley comes with fuel rails and bolts right on for a good bit cheaper. Having to pay more for a CID and then send it to another company to make work doesn't sound like fun.
I'm right there with you. I'd be curious to see how it would stack up. If I didn't have a bunch of money in my Vic Jr [ welding and porting etc. ] I'd probably go with the Holley intake and bite the bullet to cut the cowl.
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Super Vic or Vic Jr 
