sbc 18 degree trick flow heads

grudge racer · Post by **grudge racer** » Thu Jul 30, 2009 11:52 am

have anyone tried these heads and are they worth the $. and if professionally ported with matching intake what power levels can be achieved out of these on a 406 or larger sbc.

Abbottracingheads · Post by **Abbottracingheads** » Thu Jul 30, 2009 12:35 pm

I have done those heads before. They are very nice castings and will make over 800 hp with a cast manifold and 0ne carb. PM me if I can help.

Fatman · Post by **Fatman** » Thu Jul 30, 2009 9:42 pm

How do they perform with a quick hand clean up? Just a tidy in the bowl, guide boss and short turn. No real reshaping if you know what i mean.

I see they are cast at about 250cc and the claimed flow off of trickflows website shows some credible flow numbers for an as cast head.Most other 18 deg stuff is cast to be ported. These look more to be cast to be run as is if you wanted to do so.

revolutionary · Post by **revolutionary** » Fri Jul 31, 2009 8:53 am

out of the box with some amateur portwork we flowed a set and they pretty much sucked as far as an 18 degree head. They need to be ported to be right. off the top of my head I want to say they were around 340/240

chris cobb · Post by **chris cobb** » Fri Jul 31, 2009 9:57 am

grudge racer wrote:have anyone tried these heads and are they worth the $. and if professionally ported with matching intake what power levels can be achieved out of these on a 406 or larger sbc.

We have built two engines utilizing these cylinder heads with very good results. Listed below are some spec's about each engine.

414 SBC
3.875" Stroke
4.125" Bore
13.2 Compression
Total Engine Airflfow 275cc Port 18 Deg Trick Flow Heads
Comp Cam 278/294 .832/.800 112 LSA
2958 Manifold Port Matched and Plenum Blended
1000 HP Pro-Systems Carb
2" Super Sucker Spacer
1 7/8" - 2" Header w/ 3 1/2" Collector 15.9" Long
Vacuum Pump

Peak Hp = 781 @ 7300 rpm
Peak Tq = 585 @ 6000 rpm

Torque Curve was very flat.

436 SBC
4.00" Stroke
4.165" Bore
15.4 Compression
Total Engine Airflow 295 cc Port 18 Deg Trick Flow Heads
LSM Cam 278/296 .842/.782 115 LSA - 55mm core
2958 Manifold Fully Ported
2" Dominator Adaptor
1050 Dale Cubic CFM Dominator
2" - 2 1/8" - 2 1/4" Header with 4" Collector
Vacuum Pump

Peak Hp = 864 @ 8000 rpm
Peak Tq = 638 @ 6500 rpm

It averaged 852 hp from 7000 - 8000 rpm.

More information about the cylinder heads can be found at www.totalengineairflow.com.

If you have any questions please don't hesitate to give us a call at 731-697-4913.

Thanks,

Fatman · Post by **Fatman** » Fri Jul 31, 2009 8:52 pm

Thanks for sharing those builds Chris. What application were they built for?

Did you consider running the Edelbrock 2858 (4500 flange spider) on the 436" motor?

Fatman · Post by **Fatman** » Fri Jul 31, 2009 9:07 pm

revolutionary wrote:out of the box with some amateur portwork we flowed a set and they pretty much sucked as far as an 18 degree head. They need to be ported to be right. off the top of my head I want to say they were around 340/240

Depends on what you mean by amateur port work but if its the same as my definition then 340/240 sounds OK to me. I would like to see the whole flow curve if you can dig it up.

I'm not comparing with CNC ported 18 deg head by the pros. I think they are worth considering by people wanting to build big effort 23 deg motors. Why not an 18 deg motor with these 18 deg heads instead. Will probably make more power, cost about the same and leave you room to grow in the future.

user-9274568 · Post by **user-9274568** » Fri Jul 31, 2009 11:01 pm

I just did a set recently. They are ok.. They need some love, IMO. However, they have their place and a decent head to make power in a bracket type setting..

90.2% intake throat

2.99 CSA at choke

5.675 average runner length
264cc runner
59cc chamber
2.84 Average CSA

.200- 161.5
.300- 236.4
.400- 297.2
.500- 338.1
.600- 355.7
.700- 359.0
.800- 361.1
.900- 362.4

Fatman · Post by **Fatman** » Sat Aug 01, 2009 12:38 am

Chad

Did you cc them before port work? I wonder if they are 250cc on your burett. 14cc is not too much metal removal if that is the case.

Do you think the chamber is cast too big? Doesn't look like there is much room to do much with that chamber.

Is the 2.99sq" at p/rod?

user-9274568 · Post by **user-9274568** » Sat Aug 01, 2009 8:47 am

Yes, I did cc them before I started. They were in the 248cc range. These were going on a 406 bracket so we wanted to stay around the 265cc range. Agree on the chamber. I also think the SSR apex radius is to small, JMO..

grudge racer · Post by **grudge racer** » Sat Aug 01, 2009 8:55 am

will these heads out the box make the hp i need to run in the the 9s in a 3300lb car with a 421 or 427 with the right cam? or can i get the same hp out of my afr220 with good port work. just trying to see what direction should i go.

highVE · Post by **highVE** » Sat Aug 01, 2009 1:54 pm

High or low 9s??? a 9.99 v.s. a 9.00 is about 150HP (give or take) in that weight of car .

high 9s, your heads will do it with work, 9.50s then your AFR 220s will take a ton of work, on a high effort (not max effort) build. If your willing to convert to an 18 top end, do it right, and not run cast heads. A well ported set of 18sw/intake regardless of brand, as long as the ports right for your combo, you'll run 9.0s on motor.

Mike Theroux
www.mikesportingservice.com

chris cobb · Post by **chris cobb** » Mon Aug 03, 2009 9:14 am

Fatman wrote:Thanks for sharing those builds Chris. What application were they built for?

Did you consider running the Edelbrock 2858 (4500 flange spider) on the 436" motor?

Both were built for drag racing applications. The 414 was done with a budget in mind, but the heads were fully cnc'd from Total Engine Airflow.

We did try the Edelbrock 2858 on the 436 and it lost 14 average horsepower over the Edelbrock 2958 manifold. We tried four different spacers and nothing would bring back the power. The 2958 manifold had a ton of port work and the plenum was opened up. The 2858 manifold was port matched and the top of the runners had some radius work completed on them.

The 436 build was designed to be used with nitrous. It has been 5.20's at 134.xx in a 3040 lb stock suspension 1985 Camaro with a single spray bar plate with a .082 NOS pill.

If you have any other questions please don't hesitate to call or e-mail.

Thanks,

John W · Post by **John W** » Tue Aug 04, 2009 3:57 pm

chris cobb wrote:
We did try the Edelbrock 2858 on the 436 and it lost 14 average horsepower over the Edelbrock 2958 manifold. We tried four different spacers and nothing would bring back the power. The 2958 manifold had a ton of port work and the plenum was opened up. The 2858 manifold was port matched and the top of the runners had some radius work completed on them.

Chris, do you recall how the 2858's pk hp compared? Seems like the short runners in that intake would be more suited to higher rpm range. Have you ever tested a 2859?

chris cobb · Post by **chris cobb** » Thu Aug 06, 2009 5:37 pm

John W wrote:
chris cobb wrote:
We did try the Edelbrock 2858 on the 436 and it lost 14 average horsepower over the Edelbrock 2958 manifold. We tried four different spacers and nothing would bring back the power. The 2958 manifold had a ton of port work and the plenum was opened up. The 2858 manifold was port matched and the top of the runners had some radius work completed on them.
Chris, do you recall how the 2858's pk hp compared? Seems like the short runners in that intake would be more suited to higher rpm range. Have you ever tested a 2859?

John,

The peak horsepower was down 15-16 hp with the 2858 manifold. It started the pull with less torque and never gained it back throughout the test.

I think the runner's are too short for this particular application.

We have not tested the 2859 manifold on any engine yet.

Thanks for your interest.

Don Terrill’s Speed-Talk

sbc 18 degree trick flow heads

sbc 18 degree trick flow heads

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