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.
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.
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
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.
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.
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.
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.
X
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