Indy 3X , 550 cubes, gains from p porting the intake?
#2976772
10/21/21 11:02 AM
10/21/21 11:02 AM
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gregsdart
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My 550 cu in motor with 15-1 compression, .870 lift roller on methanol has the 3X Indy intake. Anyone have a 3X ported? Gains? I have port injection.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Indy 3X , 550 cubes, gains from p porting the intake?
[Re: gregsdart]
#2976778
10/21/21 11:26 AM
10/21/21 11:26 AM
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JERICOGTX
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Have you ran it on the dyno yet?
69 GTX
68 Road Runner
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Re: Indy 3X , 550 cubes, gains from p porting the intake?
[Re: Dragula]
#2976888
10/21/21 04:37 PM
10/21/21 04:37 PM
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gregsdart
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On my 512 I gained over .12s and at least +1mph from removing that damn clover shape out of the top of the 4500 intake. I just called Wilson manifolds and it sounds like they would do a similar reshaping on mine. It won't be cheap if I have them work on it but I have spent more$$$$ for a shot at less power gain.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Indy 3X , 550 cubes, gains from p porting the intake?
[Re: gregsdart]
#2977136
10/22/21 09:03 AM
10/22/21 09:03 AM
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Joined: Jan 2003
Posts: 4,101 Shelby Twp. Mi
HardcoreB
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On my 512 I gained over .12s and at least +1mph from removing that damn clover shape out of the top of the 4500 intake. I just called Wilson manifolds and it sounds like they would do a similar reshaping on mine. It won't be cheap if I have them work on it but I have spent more$$$$ for a shot at less power gain. There's probably 25 or so HP in porting it TO YOUR APPLICATION. But again because it isn't a wet application I don't feel that is hard to do for ANYONE who knows what their doing. There may be something obvious in the plenum. Pipemax will give you ideal intake track length #'s. I believe the power you got off the dyno..where does that put you in your 3050lbs? I think you're not using all you have. Just trying to sae you some unnecessary money.
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Re: Indy 3X , 550 cubes, gains from p porting the intake?
[Re: HardcoreB]
#2977152
10/22/21 10:02 AM
10/22/21 10:02 AM
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Joined: Jan 2003
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gregsdart
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On my 512 I gained over .12s and at least +1mph from removing that damn clover shape out of the top of the 4500 intake. I just called Wilson manifolds and it sounds like they would do a similar reshaping on mine. It won't be cheap if I have them work on it but I have spent more$$$$ for a shot at less power gain. There's probably 25 or so HP in porting it TO YOUR APPLICATION. But again because it isn't a wet application I don't feel that is hard to do for ANYONE who knows what their doing. There may be something obvious in the plenum. Pipemax will give you ideal intake track length #'s. I believe the power you got off the dyno..where does that put you in your 3050lbs? I think you're not using all you have. Just trying to sae you some unnecessary money. The last runs I made were at 3015 lbs, went 154 mph at 8.84. BUT, I had some serious issues. The trans was hurting, found a bad wobble. At passenger side front. Now I know why the acceleration graph looks like it does😟
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Indy 3X , 550 cubes, gains from p porting the intake?
[Re: gregsdart]
#2977768
10/24/21 01:09 AM
10/24/21 01:09 AM
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Cab_Burge
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Is this intake a early 440-3 or the later one with the single cast in boss for the EFI injectors? There is a distinct difference in the two on the intake runner divider length sticking into the plenum I think the later manifolds stick in further than the original ones with the two cast in individual bosses for the EFI injectors Your picture looks like the original shorter dividers clean up a little
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Indy 3X , 550 cubes, gains from p porting the intake?
[Re: Wicked49670dart]
#2977839
10/24/21 11:36 AM
10/24/21 11:36 AM
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fast68plymouth
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Looks like Gregs manifold has been relieved around the throttle bores a bit. Perhaps to accommodate a carb with slightly larger than “standard”(2”) 4500 throttle bores.
If Greg is running a throttle body with one large bore(like a flying toilet), I feel like the cloverleaf stuff should def go. Although, with the plenum area being dry, it may not amount to much of anything.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Indy 3X , 550 cubes, gains from p porting the intake?
[Re: Cab_Burge]
#2977843
10/24/21 11:45 AM
10/24/21 11:45 AM
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440Jim
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Is this intake a early 440-3 or the later one with the single cast in boss for the EFI injectors? I believe Greg is using a -3X manifold, not the -3 I know the -3X is a lot taller (see Indy catalog), but I don't know if the plenum to runner area is larger in cross section.
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Re: Indy 3X , 550 cubes, gains from p porting the intake?
[Re: Cab_Burge]
#2977978
10/24/21 08:03 PM
10/24/21 08:03 PM
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gregsdart
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Is this intake a early 440-3 or the later one with the single cast in boss for the EFI injectors? There is a distinct difference in the two on the intake runner divider length sticking into the plenum I think the later manifolds stick in further than the original ones with the two cast in individual bosses for the EFI injectors Your picture looks like the original shorter dividers clean up a little My 3X has vertical injecters bosses. I bought it in Jan of 2003. Looks like i did some whittling for the four Terminater 2.5 inch throttle blades.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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