Trick Flow heads.....Should I go for them? - Page 2 - Hot Rod Forum : Hotrodders Bulletin Board
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  #16 (permalink)  
Old 01-18-2003, 11:15 AM
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Hi I'm new here, but I might be able to answer some of your ?'s.
I have a set of Twisted wedge heads on a 350. It's been about two years since it's been fired so I'm working on memory here.
First the specs;
.030 TRW Forged flattop w/4 valve reliefs
Rods magnafluxed, polished beams, and ARP bolts
Comp Cams extreme energy 268
224/230 .477/.480
The heads I have are not the G2. I bought mine in 1995 so they would probably be the G2 predecessor.
They run great. Ican't really compar withthe other brands though because I've only used stock before.
I can tell you some bad things though;
ARP head bolt are a must because a bolt with a stock size head hits the guide plates.
ARP rocker arm studs won't work because the hex at the bottom hits the guide plates and is really close to the head bolts. (the trick flow studs have a smaller hex).
Stock style rocker arm adjusting nuts, (5/8), are to big because when the motor is running and you're trying to adjust the rockers the socket keeps the valve open because it wedges between the rocker and the nut. (I use Comp Cams Magnum roller tips rockers too which may or may not be part of the problem).
This brings up another problem, since the trick flow studs have to be used and they are not machined flat on top for aftermarket type nuts with the allen set screw, you have to have the top of the stud machined flat or they won't stay adjusted.
And last, the valve springs that came with mine were junk. I broke two in the first 5-10,000 miles.
I think your choice of the 23 degree will eliminate most of the problems I had. I think you'll like the results too.
This motor was/is also in an S-10. I'm just now getting it put back together.
I ran this motor with a 700R4 and 3.42 gears and a 25 in. tire and got 19-20 MPG at 65-80 MPH on the interstates. City mileage is considerably worse though!! Might have something to do with my right foot!?!

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Old 01-18-2003, 01:24 PM
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You will find alot of claims as how great these heads are? but I have tested these heads on a flow bench and found them to be false! if you want a second opion let me know and i will get you the ph# of the machine shop where the test took place?
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Old 01-19-2003, 03:26 PM
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Well, found this out about the AFR 190's.

"The 68cc chambers are designed for flat top or dished pistons; domed pistons will require additional machining. "


My pistons have a .125" dome on them. Which heads will be compatible with that?
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Old 01-19-2003, 11:07 PM
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well if i were you I would go with the edelbrock performer rpm`s (70cc), will work well with your performer intake! the afr`s and victor junior are intended for 383-406 cube and larger engines and would kill low and mid range torque, I know this sounds like a step down to you? but i`am concerned about those domed pistons you are using?what kind of compresion are you looking to get?
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Old 01-20-2003, 06:00 PM
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Well they are 10.85:1 compression with 64cc heads.
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Old 01-20-2003, 06:18 PM
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There are some issues with TF heads. Almost always need special length pushrods (hardened). If you want to use a domed piston, you have to buy theirs or have yours machined.

Check before you leap.

For "independent" flow numbers check:

www.westechperformance.com
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Old 01-20-2003, 06:20 PM
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Sorry!

Double post.

[ January 20, 2003: Message edited by: mstngjoe ]</p>
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Old 01-20-2003, 06:26 PM
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I am just trying to get the best set of heads I can that will work with my pistons.

Thats why I am getting your guys opinions.
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