oh really? ;)
Greg Conner
1996 RC
3.9 hybrid
>From: "Gary Hedlin" <ghedlin@theramp.net>
>Reply-To: dakota-truck@dakota-truck.net
>To: dakota-truck-moderator@bent.twistedbits.net
>Subject: Re: DML: Dyno #s for diy ported heads
>Date: Tue, 26 Nov 2002 23:53:28 -0600
>
>14.313??? My V6 is gonna smoke that after the new engine!!!
>
>I'm glad to see ya do your porting yourself. Makes the rewards of your
>labor that much better!! Not many would tackle that feat!
>
>
>Gary Hedlin
>"The Crazy Quadraplegic"
>ghedlin@theramp.net (business)
>ragingquad@yahoo.com (personal)
>Webmaster For
>http://garyhedlin.com
>http://importslayer.com
>http://socaldakota.com
>http://scsilverdak.com
>http://assistivetechnologies.com
>...And Many More!
>
><srp@cox.net> wrote in message
>news:20021127052232.QGAD2203.lakemtao02.cox.net@smtp.east.cox.net...
> >
> > I bet my cam would do you wonders... Sounds like my setup (but with 1.92
>RT, nonported heads). I run the 4bbl m1 too.
> >
> > Sam
> >
> > >
> > > From: Bob Tom <tigers@bserv.com>
> > > Date: 2002/11/26 Tue PM 11:59:44 EST
> > > To: dakota-truck@dakota-truck.net
> > > Subject: DML: Dyno #s for diy ported heads
> > >
> > >
> > > For all you 1/4-milers,
> > >
> > > Last winter I ported my heads with the MP porting templates.
> > > My decision for going this route came down to money.
> > >
> > > My SAE corrected numbers with the stock heads:
> > > Peak HP: 226.1 @ 5000
> > > Peak Torque: 257.2 @ 4500
> > >
> > > My SAE corrected numbers with the ported heads:
> > > Peak HP: 241.7 @ 5750
> > > Peak Torque: 254.1 @ 4250
> > >
> > > Unfortunately, circumstances dictated that two dyno shops
> > > using different software and hardware were used so that
> > > comparing the numbers is not exactly like comparing
> > > apples to apples. Also, the printout that I got for the
> > > ported heads were for increments of 250 rpm and not
> > > the normal increments of 100 rpm for the stock heads.
> > > Nevertheless, it gives a close enough ballpark figure of what
> > > to expect.
> > >
> > > With my drivetrain loss, there was a gain of about 20 hp at
> > > the flywheel. I certainly was pleasantly surprised to see that
> > > the peak torque rpm had actually dropped a couple of hundreds
> > > of rpms. I also had expected the peak hp rpm to rise but not quite
> > > so high.
> > >
> > > As for track performance, weather and track conditions did not
> > > come close to those where I ran my bests last year. 14.313 @ 95.05.
> > > My best this year was 14.42 and I did up my trap speed to 95.92.
> > > At the end of Sept. this year, I began to experience intermittent
>bucking
> > > and misfiring in the high rpm range. Initial data indicated that the
> > > problem might be air-fuel related and I concentrated on this area.
> > >
> > > Last week, I discovered the problem was the cap and rotor. All the
> > > contacts were coated with a hard, thick, 'calcium-like' deposit.
> > > I have never seen a condition like this. Looked like it went through
> > > Jon's mud pit :-)
> > >
> > > Also, when the air temps. began hitting the 40Fs and below, I noticed
> > > that my coolant temp. was around 150F (city/highway) and barely
>cracking
> > > 160 at the track. The 180F tstat turned out to be partially stuck
>open
> > > and I was running quite rich.
> > >
> > > Just to show you how much the above problems affect performance, the
> > > dyno numbers with them are:
> > > Peak HP: 217.9 @ 5600
> > > Peak Torque: 245.3 @ 4300
> > >
> > > Next week I'll be replacing the RT cam with one that is closer match
> > > to my MPI 4bbl intake and ported heads.
> > >
> > > Have a great Thanksgiving, all you USAers.
> > >
> > > Bob, Burlington, Ontario.
> > >
> > >
> >
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