Tim, we both agree, that usable power, i.e. torque and hp, at the normal
operating range, i.e. less than 5500 rpm, is more of a real world value,
than the screamers that operate over the 6k mark.
While extrude honing would help in some situations, they would not
correct the port alignment, by port matching, as you have done.
Tim's engine is very well though out, if you look at all the details in
his article on TU.
Frankly, I don't know anyone who has invested in a tool to measure the
bolt stretch, which is the most accurate way to torque a bolt. This
show attention to detail, and this engine should perform very well under
diereses.
I chose a stock 1990 Mustang GT 5.0 L engine, with only the only
addition, a set of 1.7:1 rocker rollers, to add lift of an external
change of a cam, reduce valve train friction, and lower oil
temperature. A cheap addition.
If I blow the engine, it is another junk yard engine for $500. So for
my application, the torque, reliability, and price for an engine that I
can really flog, without fear of too much $$$$$, for a replacement made
sense to me.
Larry
BTW, the roller rockers, with needle bearing and roller rockers, were
Ford items, sold through Summit for $189.
Ronak, TP (Timothy) wrote:
>Al it could help but I already port matched the intake back 3 inches into
>the ports to have the ports line up with the TFS Twisted Wedge heads.
>Extrude honing would increase intake runner volume and in my case probably
>hurt low end torque by slowing the intake charge velocity (Bigger tube to
>flow in) with some upper RPM improvement. My goal was to maximize power
>UNDER the 5500-6000 RPM threshold and not to have an engine that I
>mercilessly rev and then subsequently grenade.
>The idea does have merit though and in applications where you are not able
>to mechanically port a runner extrude honing is the ONLY way to go.
>
>Best Regards,
>
>Tim Ronak
>Business Development Manager
>Akzo Nobel Coatings
>23961 Via El Rocio
>Mission Viejo, CA 92691
>Off: (949) 305-5393
>Fx: (425) 955-6268
>Cell: (949) 289-3357
>email: timothy.ronak@akzonobel.com
>VM: (800) 234-6747 ext. 2257#
>
>This message, including attachments, is confidential and may be privileged.
>If you are not an intended recipient, please notify the sender then delete
>and destroy the original message and all copies. You should not copy,
>forward and/or disclose this message, in whole or in part, without
>permission of the sender.
>
>-----Original Message-----
>From: Al Johnson [mailto:twojohnsons@cox.net]
>Sent: Friday, March 25, 2005 4:36 AM
>To: Ronak, TP (Timothy); RMEbstein@aol.com; tigers@autox.team.net
>Subject: Re: Tim's Engine
>
>Would extrude-honing or porting your intake prove beneficial ?
>I 've had my GT-40 lowers ported on my last two late-model 5.0 Mustangs &
>gained noticeable seat-of-the pants power.
>
>
>
>
>>. The intake is
>>probably the limiter though.......The bigger point
>>is that the single plane manifolds do not fit under the under the hood of
>>
>>
>a
>
>
>>Tiger so ...
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