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Re: Trick Flow 270 combos! [Re: viperblue72] #2779449
05/29/20 12:50 PM
05/29/20 12:50 PM
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junction city oregon
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viperblue72 Offline OP
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Mopar Dave I don’t know if I’ll ever order a cam for a mopar high performance engine with more than 108lsa ever again. I just did a cam swap from a small 230@050 112 lsa cam to a 243@050 108 and the difference is staggering. I actually gained power everywhere from 2500 to 6500.
I don’t have any proven numbers but seat of the pants I’ve never gained so much power from a cam swap.

Re: Trick Flow 270 combos! [Re: viperblue72] #2779518
05/29/20 04:03 PM
05/29/20 04:03 PM
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Originally Posted by viperblue72
Thank you Andy! Does it seem these combos have diminishing returns the bigger the camshaft you go?
IMO, the "low" compression ratio (10-11) of some of these combos is not suited to 275 deg at 50 cams.


1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1
Re: Trick Flow 270 combos! [Re: 440Jim] #2779523
05/29/20 04:32 PM
05/29/20 04:32 PM
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junction city oregon
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viperblue72 Offline OP
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Originally Posted by 440Jim
Originally Posted by viperblue72
Thank you Andy! Does it seem these combos have diminishing returns the bigger the camshaft you go?
IMO, the "low" compression ratio (10-11) of some of these combos is not suited to 275 deg at 50 cams.


Jim that’s a good point. 👍

Re: Trick Flow 270 combos! [Re: viperblue72] #2779571
05/29/20 06:42 PM
05/29/20 06:42 PM
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Mt Morris Michigan
mopar dave Offline
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I used to use 108LDA rollers in my small block 408 from a 112 SFT and the switch was very noticeable. I also had a 107LDA SFT in my 340 and it ran very strong too. I read a bunch of Harold Brookshires posts over on another site. He was one of the very best cam designers/grinder to ever exist. He was the man behind ultradyne. Bullet now has it and Tim over there is a wealth of knowledge as he worked with Harold back in the day. Just spoke with him about a cam for my combo he said a 108LDA is whats needed in my 3400# car. Said everything from him gets a 108 for a mid to heavy car. Steve over at Lunati worked with Harold too and he is very much in the know as well. Harold had a cam for a 440 in a mid weight car that was on a 106 and as I understand it, was a bad ass. I have a couple rollers picked out at Bullet, both on 108's. One is a 270@50 and the other is a 278@50 and both .726". I'm very serious about the 270. I want to talk with Tim some more about the SFT Ultradyne cam's as i'm not completely sold on the roller yet. Seems a very large investment for maybe 2 or 3 tenths most vs the small investment of the SFT which may be good for a 10th or 2. Is one 10th worth investing $2000+?

Re: Trick Flow 270 combos! [Re: 440Jim] #2779574
05/29/20 06:51 PM
05/29/20 06:51 PM
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Mt Morris Michigan
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I agree 100%. Compression has a bunch to do with it. I just bumped my compression up to 12.5:1 from 11.26 with the same 270@50 SFT cam and the difference is noticeable. I see the difference in my video timer and speedo. 11.26:1 would run 60-112mph in 5 seconds. 12.5:1 runs 55-115 in 5.5 seconds. I drop it to second and shift to 3rd at 6500, when the shift lite comes on again I let off. Not real scientific, but i'm going to the track tomorrow, i'll let ya know for sure. I need to beat my best at 10.40.

Re: Trick Flow 270 combos! [Re: viperblue72] #2779812
05/30/20 05:02 PM
05/30/20 05:02 PM
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Mt.Gilead, Ohio
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I'm following this thread closely. I am not touching anything on my TF240/10.6:1/solid flat tappet/3.54 geared street/strip car just yet, but I will be collecting parts to upgrade the top end after I get my Dart on the road.


1969 Dart GTS 340
1969 Super Bee X9 N-96
1969 Coronet R/T X9 N-96
2015 Dodge Dart GT
2019 Ram 2500 Big Horn.
Looking for the original block for my Bee. The last 4 are 7449
Re: Trick Flow 270 combos! [Re: OhioMopar] #2780194
05/31/20 09:25 PM
05/31/20 09:25 PM
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Mt Morris Michigan
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I would bump your compression up a bit. I wouldn't worry with 11.25:1 on pump gas. I did it with my 408 and my 511, now at 12.5:1 i'm running 98 octane without any sign of detonation.

Re: Trick Flow 270 combos! [Re: mopar dave] #2782359
06/07/20 11:50 AM
06/07/20 11:50 AM
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Oakville, Wa
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I want to try a set! laugh


67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
Re: Trick Flow 270 combos! [Re: OhioMopar] #2782384
06/07/20 12:55 PM
06/07/20 12:55 PM
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Pattison Texas
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Originally Posted by OhioMopar
I'm following this thread closely. I am not touching anything on my TF240/10.6:1/solid flat tappet/3.54 geared street/strip car just yet, but I will be collecting parts to upgrade the top end after I get my Dart on the road.


Dont get sucked in to the 11to1 & up compression on a street car, just asking for trouble, I think I will keep my 9.7 & run whatever pump gas I want. No sense sitting on a knife edge waiting for detonation

Last edited by csk; 06/07/20 12:59 PM.

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

Re: Trick Flow 270 combos! [Re: CSK] #2782414
06/07/20 02:51 PM
06/07/20 02:51 PM
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Mt.Gilead, Ohio
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Originally Posted by csk
Originally Posted by OhioMopar
I'm following this thread closely. I am not touching anything on my TF240/10.6:1/solid flat tappet/3.54 geared street/strip car just yet, but I will be collecting parts to upgrade the top end after I get my Dart on the road.


Dont get sucked in to the 11to1 & up compression on a street car, just asking for trouble, I think I will keep my 9.7 & run whatever pump gas I want. No sense sitting on a knife edge waiting for detonation

No worries. The chamber volume is the same, and I have a really thin Cometic gasket as it is. I think with the 270's and an intake to match and a solid roller I'd be up a significant amount of power. I want to beat on this combo for a bit.


1969 Dart GTS 340
1969 Super Bee X9 N-96
1969 Coronet R/T X9 N-96
2015 Dodge Dart GT
2019 Ram 2500 Big Horn.
Looking for the original block for my Bee. The last 4 are 7449
Re: Trick Flow 270 combos! [Re: OhioMopar] #2782434
06/07/20 03:48 PM
06/07/20 03:48 PM
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Originally Posted by OhioMopar
I'm following this thread closely. I am not touching anything on my TF240/10.6:1/solid flat tappet/3.54 geared street/strip car just yet, but I will be collecting parts to upgrade the top end after I get my Dart on the road.


The 270 heads will pick up power over the 240 heads but only if you use the extra air. So either more cubic inches or more RPM. You might need to go with 4.10 gears to use the extra volume of the 270 heads and then you'll have more of a strip car than a street car. Or stroke it and use the extra air feeding more inches.

Re: Trick Flow 270 combos! [Re: AndyF] #2782443
06/07/20 04:31 PM
06/07/20 04:31 PM
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Originally Posted by AndyF
Originally Posted by OhioMopar
I'm following this thread closely. I am not touching anything on my TF240/10.6:1/solid flat tappet/3.54 geared street/strip car just yet, but I will be collecting parts to upgrade the top end after I get my Dart on the road.


The 270 heads will pick up power over the 240 heads but only if you use the extra air. So either more cubic inches or more RPM. You might need to go with 4.10 gears to use the extra volume of the 270 heads and then you'll have more of a strip car than a street car. Or stroke it and use the extra air feeding more inches.

It's a 512. More gear has been a thought, as well. But changing things is down the road a spell. I'm going to try to enjoy it for a few years.


1969 Dart GTS 340
1969 Super Bee X9 N-96
1969 Coronet R/T X9 N-96
2015 Dodge Dart GT
2019 Ram 2500 Big Horn.
Looking for the original block for my Bee. The last 4 are 7449
Re: Trick Flow 270 combos! [Re: OhioMopar] #2782447
06/07/20 04:40 PM
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A 512 with TF240 heads, modest cam and 3.54 gears seems like a great street combo to me. You probably have 600 ft-lbs of torque if you have a decent exhaust and the engine is tuned properly. I wouldn't be in a hurry to mess with that combo. Maybe get it on a chassis dyno sometime and see if you can tweak a little more power out of it. If it was mine I'd put a Sniper EFI kit on there rather than spend the money for 270 heads. With a Sniper you can dial the tune in and you can stay on top of it by watching the data logs.

Re: Trick Flow 270 combos! [Re: AndyF] #2782474
06/07/20 05:47 PM
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Originally Posted by AndyF
A 512 with TF240 heads, modest cam and 3.54 gears seems like a great street combo to me. You probably have 600 ft-lbs of torque if you have a decent exhaust and the engine is tuned properly. I wouldn't be in a hurry to mess with that combo. Maybe get it on a chassis dyno sometime and see if you can tweak a little more power out of it. If it was mine I'd put a Sniper EFI kit on there rather than spend the money for 270 heads. With a Sniper you can dial the tune in and you can stay on top of it by watching the data logs.

I posted my dyno session at the end of April. It made 491 at the tire. It's got 1 7/8 ttis and a 3" X-pipe exhaust with Ultra Flows. I'll be adding an AFR gauge when I get the exhaust tweaked how I want it. Efi might be down the road.


1969 Dart GTS 340
1969 Super Bee X9 N-96
1969 Coronet R/T X9 N-96
2015 Dodge Dart GT
2019 Ram 2500 Big Horn.
Looking for the original block for my Bee. The last 4 are 7449
Re: Trick Flow 270 combos! [Re: OhioMopar] #2782494
06/07/20 07:02 PM
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Right, I remember that now. It is a really solid combo that you built. The wideband will help with the tuning and EFI down the road would be a significant improvement. The Sniper won't add any power but you'll be able to dial in the tune more precisely.

Re: Trick Flow 270 combos! [Re: AndyF] #3004750
01/12/22 10:09 PM
01/12/22 10:09 PM
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junction city oregon
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viperblue72 Offline OP
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Haven’t been on moparts in a while. I thought I’d share an update on this thread in case anyone ever googles 270 heads and wants more info. I did share my results on a different post. I bought this short block back from my dad and built it. I ended up with this for the final combo.

511ci. Fwiw it has a 6.7 rod and a 1.12ch piston. Compression came to 11.6 to 1
The Tf heads are out of the box and checked over.
Ported Indy 400-2 intake. 1050/4150 carb
265/269 .660/.652 on 108lsa installed at 105.
1.6 rockers so net lift after lash is around .680ish
TTI 2 to 2 1/8 step headers
Dyno results were 742 horsepower and 699.9 torque.
We used a 950 carb on the dyno which was pulling about 2” vacuum From 5300 up.
2” spacer and 38 timing.
First pull with no spacer and 34 timing it made 723/680.
At 36 timing it made 736hp I forget the torque.
Hope this is helpful. I don’t have 1/4 mile times but I put it in a cuda it’s going to have a 4700 stall 9.5 dynamic converter, it has a strange Dana with 4.10s with mono leafs and cal tracks moved in 1” with 295/65 drag radials.
I’d love to see a 9.99 but I’m thinking it will be in the 10.00-10 teens. I think the race weight is going to come out to around 3650-3700.

Re: Trick Flow 270 combos! [Re: viperblue72] #3004793
01/13/22 01:52 AM
01/13/22 01:52 AM
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Bloomingdale , OH
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Mine is a 451 combo. 270 heads , 1.6 rockers , comp 707 solid roller ,12.6 compression , Indy 400-2 with 2" dominator adapter, 1050 , hooker 2" super comps . Haven't had the engine on a dyno . it did run some new bests last season. 10.14 @132 , 6.42@106 1.37 60' car is a hair over 3500 lbs. I'm guessing it might be 650 - 700hp so I would think a 511 should be able to make a bit more !

Re: Trick Flow 270 combos! [Re: super451b] #3004820
01/13/22 10:19 AM
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Shelby Twp. Mi
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Thanks for the updates, nice results! Somehow I overlooked this thread in the past. In reviewing, some of these theories about camshaft choice are wrong and misleading. But what do I know?

Re: Trick Flow 270 combos! [Re: super451b] #3004852
01/13/22 12:17 PM
01/13/22 12:17 PM
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The Great White North
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Originally Posted by super451b
Mine is a 451 combo. 270 heads , 1.6 rockers , comp 707 solid roller ,12.6 compression , Indy 400-2 with 2" dominator adapter, 1050 , hooker 2" super comps . Haven't had the engine on a dyno . it did run some new bests last season. 10.14 @132 , 6.42@106 1.37 60' car is a hair over 3500 lbs. I'm guessing it might be 650 - 700hp so I would think a 511 should be able to make a bit more !



Nice, I've done a bit of a weird one here with an offset ground stroke of 3.800" x 4.350" bore for 452 cubes with a 7.1" rod. This is twin torqstorm deal and compression is a true 8.78-1. NA it made 612hp/545tq with a Comp RX296 solid roller. J.Rob

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Re: Trick Flow 270 combos! [Re: 67mprfan] #3004884
01/13/22 01:37 PM
01/13/22 01:37 PM
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UK
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Our street/strip combo is a bit different. We are at 589ci, 4.565x4500, just 10:1CR which is not the way to go for the 365CC -13 heads, a tiny Herbert .625" 260/270@.050 solid roller, a 440-2 with a small older 950HP carb that pulled 2" of vacuum@max rpm and 2.1/8" step TTI's with 4" collector, dyno'd@ 695hp from 5500>5900 and 724ftlbs@4400, different animal to a 505/511 just another way to get 700hp which most wouldn't do but thats how it came all built and ready to go in for a good deal.

Last edited by rb446; 01/13/22 02:03 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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