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.
> >
> >
>
This archive was generated by hypermail 2b29 : Fri Feb 06 2004 - 11:47:28 EST