511 TF 270 build questions!
#2852639
11/28/20 05:08 PM
11/28/20 05:08 PM
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Joined: Aug 2006
Posts: 2,141
junction city oregon
viperblue72
OP
top fuel
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OP
top fuel
Joined: Aug 2006
Posts: 2,141
junction city oregon
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I have a 511 coming together and would like it to make as much power as it can with what I have. As close to 700 as possible.
11.5 compression
264/268 .660/.652 on 108 solid roller
1.5 Mancini rockers
Indy 400-2 single plane
2 to 2 1/8 step header
1050/4150 carb
The motor is street/strip so no dominator. Although I may try one on the dyno.
My main question is about the intake. How much porting is necessary on the intake? What would it make just port matched vs more porting. Does anybody have pics and details?
How much would a 1.6 rocker help power and how would it affect longevity?
And second what should this motor make for power and torque for the average person?
I do plan to have it on a dyno in a few months.
If you have a similar build or other thoughts feel free to share.
Last edited by viperblue72; 11/28/20 05:10 PM.
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Re: 511 TF 270 build questions!
[Re: viperblue72]
#2852715
11/28/20 09:02 PM
11/28/20 09:02 PM
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Joined: Mar 2009
Posts: 2,458
Sydney,Australia
tex013
top fuel
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top fuel
Joined: Mar 2009
Posts: 2,458
Sydney,Australia
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I use a super victor on my 505 , i port matched it and cleaned up at carb flange . Went back about 2/3 " @ ports .
I would expect you to make a few more hp than me as i have 11.0:1 and a big sft cam , 0.600 nett lift
I also run full exhaust to diff . I would love to try 1.6 but as i have crane 1.5 i cant buy replacement 1.6 . They might be a bit harder on springs .
Times in my sig , 10.25 was on 28" radials , World block was on 30" radial
Tex
New best ET 10.259@129.65 .
New best MPH 130.32
Finally fitted a solid cam,
stepped it up a bit more
3690lbs through the mufflers
New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm
Power by Tex's Automotive
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Re: 511 TF 270 build questions!
[Re: viperblue72]
#2852719
11/28/20 09:10 PM
11/28/20 09:10 PM
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Joined: Aug 2011
Posts: 2,853
Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,853
Pattison Texas
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I had to do quite a bit of grinding on my 400-2 to make it Max wedge size. also it had a lot of core shift .
1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5
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Re: 511 TF 270 build questions!
[Re: tex013]
#2852720
11/28/20 09:13 PM
11/28/20 09:13 PM
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Joined: Oct 2015
Posts: 570
UK
rb446
mopar
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mopar
Joined: Oct 2015
Posts: 570
UK
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We only have a 10:1cr mild street/strip motor, 589ci though, runs a small .625"-260/270@.050 s/roller, cnc365 -13's, 440-2 don't know if its been ported or matched, small 950HP carb, 2.1/8>2.14" -4" collector TTI's and made 695hp on the dyno, mph/weight through full exhausts shows we are only 20-hp off that.....you should do 700hp with your 11.5:1 combo assuming you got good heads which you don't mention.
Last edited by rb446; 11/28/20 09:14 PM.
1969 'Cuda 446ci, best 9.96@133.9 in 1990
1971 340 'Cuda, best 11.01@122.8 in 1987
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Re: 511 TF 270 build questions!
[Re: CSK]
#2852724
11/28/20 09:27 PM
11/28/20 09:27 PM
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Joined: Aug 2011
Posts: 2,853
Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,853
Pattison Texas
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You can see the scribbed marks around the ports, this was just the rough in, I followed all the way through the roof of the runner,
1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5
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Re: 511 TF 270 build questions!
[Re: viperblue72]
#2852755
11/28/20 10:28 PM
11/28/20 10:28 PM
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Joined: Aug 2003
Posts: 43,124
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,124
Bend,OR USA
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All the Indy 400-2, 400-3 ,440-2 and 440-3 all, both early and late castings, had M.W. size intake ports. I've never owned or seen a 400-1 or 440-1 intake, are they stock 440 size intake ports? As far as HP and torque with Indy SR M.W. size intake ports and 440-1 ported M.W. size heads dyno tested the same short bocks made 50 to 70 HP more with the bigger heads using the same intake, carb, camshaft and compression ratio. The pump gas stoker 400 517 C.I. motor 10.78 to 1 compression ratio made 727 HP with the SR heads and 775 HP with the 440-1 heads. My 440 526 C.I. high compression test mule motor made 775 HP with the Indy SR M.W. size intake port heads and 845 HP with the same 440-1 heads that I had used on the pump gas 400 stroker motor. All testing was done at Karls machine shop on his DTS engine dyno in Klamath Falls, OR at 4300 Ft above sea level back in the spring of 2010 or so  What heads are you going to use, Trick Flow 270? I haven't used any of Trick Flows parts yet but I am looking forward to trying some of them soon   BTW, Holley 1050 CFM Dominator carbs with the original List # 9375 work great on the street, not so on the later #9375 HP versions   I did have to lean down the front idle feed fuel circuits and the same on the front transition fuel feed circuits to get them lean enough for me to like them that way 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 511 TF 270 build questions!
[Re: Cab_Burge]
#2852775
11/29/20 12:28 AM
11/29/20 12:28 AM
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Joined: Aug 2011
Posts: 2,853
Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,853
Pattison Texas
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All the Indy 400-2, 400-3 ,440-2 and 440-3 all, both early and late castings, had M.W. size intake ports. I've never owned or seen a 400-1 or 440-1 intake, are they stock 440 size intake ports? As far as HP and torque with Indy SR M.W. size intake ports and 440-1 ported M.W. size heads dyno tested the same short bocks made 50 to 70 HP more with the bigger heads using the same intake, carb, camshaft and compression ratio. The pump gas stoker 400 517 C.I. motor 10.78 to 1 compression ratio made 727 HP with the SR heads and 775 HP with the 440-1 heads. My 440 526 C.I. high compression test mule motor made 775 HP with the Indy SR M.W. size intake port heads and 845 HP with the same 440-1 heads that I had used on the pump gas 400 stroker motor. All testing was done at Karls machine shop on his DTS engine dyno in Klamath Falls, OR at 4300 Ft above sea level back in the spring of 2010 or so What heads are you going to use, Trick Flow 270? I haven't used any of Trick Flows parts yet but I am looking forward to trying some of them soon BTW, Holley 1050 CFM Dominator carbs with the original List # 9375 work great on the street, not so on the later #9375 HP versions I did have to lean down the front idle feed fuel circuits and the same on the front transition fuel feed circuits to get them lean enough for me to like them that way You can buy them already max wedge from Indy, but they come unported & they are in between 440 port & Max wedge size
Last edited by csk; 11/29/20 12:31 AM.
1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5
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Re: 511 TF 270 build questions!
[Re: CSK]
#2852780
11/29/20 12:43 AM
11/29/20 12:43 AM
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Joined: Jan 2003
Posts: 4,270
Morrow, OH
markz528
master
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master
Joined: Jan 2003
Posts: 4,270
Morrow, OH
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Your build is very similar to my 505. Your cam has slightly more lift and slightly more duration. Not much. But I use the Mopar Performance 337 intake. My carb is a 4150 and flows 1000 cfm. I have Hooker 2 inch 5209 headers. My compression is just under 11.2:1. Untouched TrickFlow 270 heads. Intake was port matched and nothing else was done to it.
My motor made 713 hp and around 709 torque. I would think that yours should make more, but I don't know how that intake will perform versus the 337 intake. Also street/strip.
Last edited by markz528; 11/29/20 12:45 AM.
67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 14.82 @ 94 mph
69 GTX (clone) - build in progress......
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Re: 511 TF 270 build questions!
[Re: viperblue72]
#2852852
11/29/20 11:58 AM
11/29/20 11:58 AM
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Joined: Jul 2004
Posts: 19,317
State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,317
State of confusion
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Tunnel ram VERY street able and super fast.......
Last edited by Thumperdart; 11/29/20 11:59 AM.
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: 511 TF 270 build questions!
[Re: viperblue72]
#2855651
12/05/20 12:10 PM
12/05/20 12:10 PM
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Joined: Jul 2004
Posts: 19,317
State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,317
State of confusion
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I'm running a pair of 650ish billets and my Dart has never ran harder and felt this good compared to a single Dommy. I will never even consider a single carb deal again cos no single manifold on earth can give you the distribution and power of a pair of properly sized and set up carbs......
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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But I don't want that sticking through the hood... can you recommend a good dual-quad manifold other than a TR? 