Cathedral port AFR 210's or Trick Flow GenX on a 408
06-15-2015, 04:49 PM
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Cathedral port AFR 210's or Trick Flow GenX on a 408 I am now running a 5.7 liter LS1 with AFR 210 Mongoose heads on my jet boat. Spraying a 170 shot, the thing is a freakin beast. I'm fixin to step it up a bit with a forged assembly so I can spray it with a 350-400 shot.
My cam is an LG G5X3. 240 something duration and .610 lift on a 114.
I'm wondering if it would be worth some extra umph to step up to a forged 408 stroker with a set of Trick Flow GenX 255's. Maybe even step up to a G6X3 cam also.
I run a carb on my boat. IF I go with the Trick Flows, I'll also get a Super Victor to run a Dominator carb. Running a Demon 850 on it now with a fully ported Victor Jr.
Last weekend in 93 degree air it ran 93 mph in the 1/8th on a 170 shot.
Looking for opinions of peeps who been there and done that. IF I go with Trick Flows, my AFR's and Victor Jr will be up for sale.
The grey boat.....
My cam is an LG G5X3. 240 something duration and .610 lift on a 114.
I'm wondering if it would be worth some extra umph to step up to a forged 408 stroker with a set of Trick Flow GenX 255's. Maybe even step up to a G6X3 cam also.
I run a carb on my boat. IF I go with the Trick Flows, I'll also get a Super Victor to run a Dominator carb. Running a Demon 850 on it now with a fully ported Victor Jr.
Last weekend in 93 degree air it ran 93 mph in the 1/8th on a 170 shot.
Looking for opinions of peeps who been there and done that. IF I go with Trick Flows, my AFR's and Victor Jr will be up for sale.
The grey boat.....
06-15-2015, 05:17 PM
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Right now it's a stock bottom end LS1. I wanna go forged to hit it harder, A LOT harder. Like a 350 to 400 two stage shot. I'm hitting it with a 170 now. Gonna pill it to 190 next time out to see how that goes. That will be as big as I go on stock rods and crank.
Looking at a TSP 231/236 cam also. It's a beast. It's got a 111 LSA, better for a carb.
Looking at a TSP 231/236 cam also. It's a beast. It's got a 111 LSA, better for a carb.
06-16-2015, 07:43 AM
#4
Even though I haven't heard that many good things about the squre port Trickflows, for a big shot 408 I think those would definitely work better than the small cathedrals.
Although at that point I'd probably go with some 245 cathedrals or something like that.
Although at that point I'd probably go with some 245 cathedrals or something like that.
06-16-2015, 03:41 PM
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I wish Edelbrock made a cathedral port Super Vic for a Dominator.
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06-16-2015, 06:02 PM
#8
What are you running for an intake now??
A 408 and my new MMS 235 head with my NFI exhaust would rip your face off on spray with the right camshaft (you would see 100+ HP N/A and 150+ on the bottle with the NFI version of my new head).
Its cheaper to stay cathedral if you have a good intake.....and how hard do you plan to spin the new combo? A honking cathedral set-up might make more sense anyway.
-Tony
A 408 and my new MMS 235 head with my NFI exhaust would rip your face off on spray with the right camshaft (you would see 100+ HP N/A and 150+ on the bottle with the NFI version of my new head).
Its cheaper to stay cathedral if you have a good intake.....and how hard do you plan to spin the new combo? A honking cathedral set-up might make more sense anyway.
-Tony
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Tony@MamoMotorsports.com
Anything worth doing is worth doing well. Build it right the first time....its alot cheaper than building it twice!!
06-16-2015, 08:33 PM
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Ported Victor Jr. In original post.
MMS 235s much more responsive on 408 vs Square Ports!
2.10" valve up to 4.060 Bore better combo and 235 CC vs
255+ for HR & up to 7000 RPM.
Just my .02
MMS 235s much more responsive on 408 vs Square Ports!
2.10" valve up to 4.060 Bore better combo and 235 CC vs
255+ for HR & up to 7000 RPM.
Just my .02
06-17-2015, 07:24 PM
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Yeah, my intake is a ported Victor Jr WITH a 2" Super Sucker carb spacer. The spacer will get frost on a hot summer day at WOT.
Right now on spray I'm getting 6,500 rpm with my current impeller cut. With a forged assembly I'd like it to be at about 7,000. Even in a drag boat, it only see's that RPM for a 10 seconds at a time. Lake cruising is usually about 4,000 to 4,500.
I'll look into the MMS heads. Been doing some talkin' with my buds. May just make the current motor into a forged 383 that can take a HUGE shot of spray
and keep running the AFR's I have now also.
So now.. Forged 383 vs a 408?? haha
Right now on spray I'm getting 6,500 rpm with my current impeller cut. With a forged assembly I'd like it to be at about 7,000. Even in a drag boat, it only see's that RPM for a 10 seconds at a time. Lake cruising is usually about 4,000 to 4,500.
I'll look into the MMS heads. Been doing some talkin' with my buds. May just make the current motor into a forged 383 that can take a HUGE shot of spray
and keep running the AFR's I have now also.
So now.. Forged 383 vs a 408?? haha
07-01-2015, 08:35 AM
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Well, this pot just got moved to the front burner. Made a 95 mph pass on spray and spun a bearing. Thing was quick as hell, but the LS1 is getting retired from boat duty.
SOOOOOOOO..........
A forged 408 is fixin to get started on in a couple of days here. Heads is the question.
AFR vs Trick Flow vs TSP vs MMS and looking to stay with cathedral ports. IMO, rect ports might flow better, but cathedral ports make the power numbers.
I'm looking for out of the box heads that will take stock gen III rockers with a trunion kit. My headers have to work on them too.
Also, I have a G5X3 cam now, would like to go a touch bigger and something that's ideal for a carb application. Although, that LG EFI cam worked real well. My boat's nickname is Big Block Killer.
SOOOOOOOO..........
A forged 408 is fixin to get started on in a couple of days here. Heads is the question.
AFR vs Trick Flow vs TSP vs MMS and looking to stay with cathedral ports. IMO, rect ports might flow better, but cathedral ports make the power numbers.
I'm looking for out of the box heads that will take stock gen III rockers with a trunion kit. My headers have to work on them too.
Also, I have a G5X3 cam now, would like to go a touch bigger and something that's ideal for a carb application. Although, that LG EFI cam worked real well. My boat's nickname is Big Block Killer.
07-01-2015, 09:19 AM
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I think I'm leaning toward the TSP 237 heads, maybe with a Texas Giant cam. I might be giving up a pony or two to AFR and Trick Flow, but the TSP's come with spring and retainers that are ready to go big out of the box for a couple hundred less.
Are there any dyno numbers for the Mamo heads on a 408? About all the other brands have dyno numbers here..
http://www.hotrod.com/how-to/engine/...der-head-test/
Are there any dyno numbers for the Mamo heads on a 408? About all the other brands have dyno numbers here..
http://www.hotrod.com/how-to/engine/...der-head-test/
07-01-2015, 09:20 AM
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I would go MMS235s with light intake valves and pm guides,
CAM MOTION CAM specced by Kip for your N2O combo.
Talk with Tony the MMS 235s can also be had with Nitrous/FI
exhaust port! Enough airflow for ~700 FWHP NA, before adding
Nitrous!
CAM MOTION CAM specced by Kip for your N2O combo.
Talk with Tony the MMS 235s can also be had with Nitrous/FI
exhaust port! Enough airflow for ~700 FWHP NA, before adding
Nitrous!
07-01-2015, 09:28 AM
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663 FWHP with previous generation MAMOFIED AFR 230s on a 416"
MMS 235s out of the box outflow the MAMOFIED AFR 230s.
Do a search on Jeremy's 416 built by Tony for all the specs and
Graphs.
MMS 235s out of the box outflow the MAMOFIED AFR 230s.
Do a search on Jeremy's 416 built by Tony for all the specs and
Graphs.
07-01-2015, 10:35 AM
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Can't find Jeremy's deal, but sent Tony an email. The I read on the Mamo 235's, the more impressive they are. Real interested in something built for nitrous. Top em with a Mast 4500 intake and a 1050 and damn......
07-01-2015, 12:18 PM
#18
Cathedral port AFR 210's or Trick Flow GenX on a 408 If I read it correctly, he's looking for "out of the box" and go. No "Mamofication"
Hit Tony up about his new 235's he has. But like you said, the PRC's will perform and be cheaper. Sounds like you're not worried about "under the curve" which is where the AFR's really shine.
If it's all top end you're looking for, I'd grab a set of TFS 255 LS3's and let her eat.
Also sent this in a PM, but you might check and see if he can run his 235 program on your 210's. It's worth the ask I'm sure.
Hit Tony up about his new 235's he has. But like you said, the PRC's will perform and be cheaper. Sounds like you're not worried about "under the curve" which is where the AFR's really shine.
If it's all top end you're looking for, I'd grab a set of TFS 255 LS3's and let her eat.
Also sent this in a PM, but you might check and see if he can run his 235 program on your 210's. It's worth the ask I'm sure.
Last edited by dr_whigham; 07-01-2015 at 12:23 PM.
07-01-2015, 02:06 PM
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OP, ask yourself if a few hundred is worth the engine running as well as it possibly can. I know we are all on a budget but why stop short when you're so close anyway?
07-06-2015, 10:56 PM
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Tony, tell me more about the 235 NFI head. Highly interested. Looking at probably going with an LSX block and keeping it a short stroke 427. I'll be wanting and cam optimized for a carb on a big dose of laughing gas.
I wanna hit it with a 350 shot and let it eat big blocks.
I wanna hit it with a 350 shot and let it eat big blocks.