Progress Thread Darn Stock Block Problems - Cylinder Head Decisions....

Hoytster

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Cylinder head decisions.....

I currently have a set of TW170 heads that I was planning on sending out to get CNC ported by either TEA or Fox Lake. After talking to TEA yesterday, I'm starting to second guess that since the guy I talked to didn't seem real confident they could get them to a 205 intake runner. Also, after talking to him it seems I will be $1000+ into the heads just to get them ported and rebuilt using my existing valvetrain (springs, retainers, valves, studs, ect). The price would go up if I needed anything replaced. The port job alone is $650+.

Looking at Fox Lake, it looks like I would need to go their Stage 3 porting program to approach the flow numbers of an 11R 205 head. That cost is $1295 unassembled or $1799 with a valve job, new springs, and a refresh.

Fordstrokers currently has the Trick Flow 11r 205 heads for $1899.00 with free shipping. Brand new everything, better valve train, better valve angles, ect. Seems like a no brainer.

Am I missing anything here? Has anybody had experience having their TW170's CNC ported to support a 363? Is there any benefit to TEA or Fox Lakes CNC porting compared to the 11R 205 heads that Fordstrokers offers?

I'm thinking I could sell my current TW170's for around $600-700 as is, buy the 11R 205's from FordStrokers for $1899.00 and save shipping costs, and have a brand new set of heads with all new components and possibly still have better flow capabilities then what I could get from porting my TW170's (and probably be cheaper).
 
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a91what

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The 11R 205 head is amazing, the chamber design is very modern and requires much less timing than a typical cylinder head.

As for port size a 205 will do very well on an NA motor up to 400cid. I think it would be silly to send out yours if you can get new for a similar price, I am sure you can off load the 170's and cut the cost of the new heads in half.
 

Hoytster

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The 11R 205 head is amazing, the chamber design is very modern and requires much less timing than a typical cylinder head.

As for port size a 205 will do very well on an NA motor up to 400cid. I think it would be silly to send out yours if you can get new for a similar price, I am sure you can off load the 170's and cut the cost of the new heads in half.

Good info. I've heard nothing but good reviews of the 11R design but didn't know they can take less timing as well.

It surprised me when I saw the price on Fordstrokers this morning for their 11R 205's. When I looked at those heads before everyone else wanted around $2200+ for the configuration I wanted, and is why I was leaning toward having my existing 170s worked. Now it does seem silly.
 

Mustang5L5

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I would go with the 11R's. If I ever assemble a 331/347/363 long block, i'll likely offload my TFS170's and slap some 11R's on there. I've heard nothing be great things about those heads.
 
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Hoytster

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I would go with the 11R's. If I ever assemble a 331/347/363 long block, i'll likely offload my TFS170's and slap some 11R's on there. I've heard nothing be great things about those heads.
Do you think $600-700 is a fair price to ask for a set of used TW170's that are in good condition but not rebuilt? I checked them with my straight edge after cleanup and I couldn't get a .0015 feeler guage through on the cylinder head surface.
 

Mustang5L5

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I think that's fair. If they look clean, I would be you could even go $800ish. All depends on local market. They can be had for $1320 new, so I think $700 would definitely get people interested. If you have time, start out higher and knock off $50 every now and then until they sell
 
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a91what

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As an example... the 11R 190 heads on a typical 10:1 331cid engine running 93 octane.
Using trap speed as a tuning guide, with 2 passes on each tune change and using the median value.

30* was the baseline for the tune nothing crazy, 29* at 2500 and taper to 30* by redline.
We bumped it to 31* by redline and slowed down by 2mph
We then dropped the timing 27* at 2500 taper to 29* redline and picked up 3mph over the baseline run
[air temps were better on the last run by 4*] but I did not think this had any major effect on the outcome in general.

on a different day we tried dropping it further but slowed down. better fuel would have allowed us to run more timing but streetcar.
 
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2000xp8

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I agree.
I'm not a fan of building something you can just buy.

I'd guess in today's market TW's are worth $800+
At $700 it even crosses my mind to buy them and i have nothing to put them on, lol.
That's like x head pricing.
 

Hoytster

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11R 205's it is. Thanks for the advice guys, just need a little push.

I ended up putting in my order for the heads and short block as well this afternoon from Fordstrokers. Going with the 363 SHP block setup for 900-1000 HP with their fox pan/pump package and around 9.3:1 static CR. They said they are about 3-5 months out, so I have a little bit of a wait.