AFR versus TFS Alloy Heads - AP Still Reckons TFS is the Go - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

Aussie Pete · 05-07-2003, 17:18

I've been saying this for quite a while. People know how good the AFR alloy heads are for Windsors as they perform great in flow numbers - particularly peak figures. However, I chose Trickflow Twisted Wedge (in my case the TrackHeat heads) because the heads produce better torque (via improved flow) at lower valve lifts. This was why my engine felt so strong in the midrange (347ci).

Don't be fooled by peak flow numbers. What you are looking for is basically the area under the flow curve to tell you the amount of flow possible for evry intake cycle.

http://www.fordmuscle.com/archives/2...fr/index.shtml

Whilst the article says the TFS haeds use the larger valve (which assumedly you can retrofit to the AFR heads), you can also modify the TFS heads by matching the porting of the AFRs (which we did to my heads) with the change available in purchase prices.

My vote is still for the TFS heads on a street engine.

xr8_sprint · 05-07-2003, 18:21

I would personally go the AFR 185's over the TFS.

However i would go the TFS over the 165's.

I've looked at a set of AFR 185's and they are hogged out big time - would get MASSIVE flow. Ideal for a nutso cam and a stroker and maybe even a blower...

I'll be going the 185's over Twisted wedge.

svo347 · 05-07-2003, 19:53

I have to agree with you Pete.
I have a friend in Perth with an EL Ghia that runs basically the same gear as me with the exception of Heads. He was recommended AFR's whilst I use TFS Twisted Wedges.
The difference in midrange is just totally rediculous

slipper · 05-10-2003, 21:40

Hey Pete,

On the subject of induction / heads, I was wondering how you finially decided which inlet manifold to use on your old Windsor?

I have seen plenty of articles comparing lots of cylinder head designs, including the URL you posted. However, I have not had as much luck tracking down good comparisons of the available aftermarket inlet manifolds from Holley, Edelbrock, TFS et al.

Did Rob steer you towards the TFS Track Heat?

Cheers,
Matt.

Aussie Pete · 05-11-2003, 15:56

Quote:

Originally posted by slipper
Hey Pete,

On the subject of induction / heads, I was wondering how you finially decided which inlet manifold to use on your old Windsor?

I have seen plenty of articles comparing lots of cylinder head designs, including the URL you posted. However, I have not had as much luck tracking down good comparisons of the available aftermarket inlet manifolds from Holley, Edelbrock, TFS et al.

Did Rob steer you towards the TFS Track Heat?

Cheers,
Matt.

No. Rob had just bolted together the engine in his Black Fairmont. Whilst I later found he had fitted TFS stuff, I had made up my mind on what I wanted. I rang Rob to confirm he was okay with what I was buying.

I went the TFS heads because they had a good name for midrange torque (knowing AFR was the better power head up high) which was what I was after. Then I needed a suitable intake and the TFS seemed the go for the fact it can be reversed for Falcon right hand drive. I chose the TFS Track Heat manifold with the shorther runners because I wanted to fit a larger phenolic block anyhow and with the stroker the shorter runners would not hurt low end torque.

The results weren't good. I complained that it felt doughy and not responsive. It was only during my trip to the states (3 months) that I decided to send the car back to Rob. I asked for the compression to be upped to 10.5 and a few intake additions. We also fitted 1.7 rollers (since I had fitted the smallest TFS cam).

Finally, a fantastically flexible engine. Leave it in third gear and hit the Great Ocean road - smiles from ear to ear!

ebxr8240 · 05-14-2003, 04:00

While on the subject of heads etc. Ask for the new T.F.S "high ports"...

SiKEDXR8 · 05-14-2003, 04:15

I'm keeping the compression on my 302 at 9:1 and i only have ported and polished heads, is it then a bad idea to go for a trickflow track heat manifold?..... is street talker (i think that's what it's called) the way to go?

cheers
Simon

ebxr8240 · 05-14-2003, 05:45

I would go street,with track heat & std ish heads you may lose some bottom end, the manifold is vertually the same except the top runners are longer..Infact the lower is the same on both..
Depends on rest of package..maf etc...

SiKEDXR8 · 05-14-2003, 05:47

yeah i just looked at the track heat, and street differences and it's just the runner length...

i've got a 70mm MAF and a 70mm throttle body is going on so it should flow okayish to the manifold, don't think 75mm throttle bodies are the way to go, maybe too big

ebxr8240 · 05-14-2003, 05:57

Quote:

Originally posted by SiKEDXR8
yeah i just looked at the track heat, and street differences and it's just the runner length...

i've got a 70mm MAF and a 70mm throttle body is going on so it should flow okayish to the manifold, don't think 75mm throttle bodies are the way to go, maybe too big

70mm on both is good just make sure maf is calibrated to injectors etc..latter mafs where 24's from A.u 200kw on..

imo don't worry about cam, Fit 1:7 rockers as in std h.p 5 Ltrs..If you don't want to change cam..

You will also notice on the tfs site that it says not to fit gasget on block to inlet bottom[horizontal] part, just use silicone. Inlet gasgets must be used on inlet ports gasket though..It can hold manifold up and cause inlet leaks etc...