Kevin
A.C. is correct; you need to be aware of the different head
configurations.
Generally the 289 heads with larger valves and larger ports will give you
more HP. You also need to use a 289 intake manifold because it also has
larger ports. The 260 intake manifold has smaller ports but would still
give you some increase in HP but generally less than the 289 manifold.
The C3AE-F 289 heads are the only ones with the smaller valves, same as 260
heads, I believe but should still give a HP increase due to the larger
ports.
The following 289 heads should all have the larger valves and the same size
combustion chamber:
C4AE-C, C5AE-B, C6OE-M, C4OE-B, C5AE-E, C5OE-A, C7ZE-A
Ron Fraser
-----Original Message-----
From: tigers-bounces@autox.team.net [mailto:tigers-bounces@autox.team.net]
On Behalf Of A. C. Tynes
Sent: Wednesday, September 09, 2009 10:31 PM
To: 'kevin beck'; tigers@autox.team.net
Subject: Re: [Tigers] 289 heads
Kevin,
According to George Reid's "High Performance Engine Parts Exchange" there
are number of different head specs for 289's, some with the same size valves
as the 260. Some also had larger combustion chambers than the 260, which
could lower your compression ratio. You would have to know exactly which 289
heads you were going to use to get an idea of the effect on your 260. I
expect that other, more knowledgeable, list members can give you some
suggestions of which 289 heads would be best.
On the other hand, given the improvements in SBF heads over the years and
the cheapness of late 302/5.0L iron heads now, you may want to consider
later "E7TE-PA" Mustang GT heads, the SVO GT40 heads or the GT40P Explorer
heads. The prices, especially for the E7 heads, are really low and the
availability is high. I'll even give you a pair of E7's if you'll pick them
up near New Orleans and buy me a beer.
Of course, the reason that iron heads are so cheap is that aluminum heads
are so plentiful and make so much easy power. That is what I would be using
if not for the cost difference.
HTH,
A. C. Tynes
New Orleans
> -----Original Message-----
> From: tigers-bounces@autox.team.net
> [mailto:tigers-bounces@autox.team.net] On Behalf Of kevin beck
> Sent: Wednesday, September 09, 2009 8:21 PM
> To: Tigers@autox.team.net
> Subject: [Tigers] 289 heads
>
> Thinking of putting 289 heads on my 260 partly because of the
> larger valves, how would this effect my 260 motor? Thanks
> Kevin _______________________________________________
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