Finally got the last iteration of Gary's Tunnel Port motor finished and dyno'd.  It was a 600 hp engine before, with the heads used as Gary sent them.  They flowed decent, around 340, but didn't have any velocity and petered out at around .600" lift. 

We decided for the sake of data that we would try something a little different, so I sent the heads and intake to Lawes Mayfield to have them ported.  He raised the floors in both the intake and head and increased the flow by another 40 cfm....380 cfm TP heads, with a smaller CSA than the factory designed them to be. 

I changed the camshaft around a little too.  Kept the same .050" duration, but added a lot of lift, about .150" more than before.  Widened the LSA by 2 degrees as well. 

I hated that we changed so many variables at once, but I know Gary didn't want this to be a dyno queen all its life.  In addition to the head/intake/cam work, we also added some RaceTec domed pistons, which bumped the compression ratio up from 10:1 to 12:1, and rebalanced the crank. 

The engine responded much, much better than I ever expected.  On the very first pull to 5200, it made the 600 hp that the last iteration made at full song.  Further tuning and pulling to 7000 saw a peak hp of 696 @ 6700.  Torque was 589 lb-ft. 

Duplicate post from the other forum, but I didn't know how many people were just members here.

It's interesting to see some of the trends that come and go with customer builds.  It's almost like fashion....bell bottoms were in, out (thank goodness), back in again, back out, etc.  I see the same trends with engine builds....guys want big inch stroker builds, then the old factory stuff comes back in style. 

I enjoy the swing, sometimes doing the same build over and over gets boring and after 4-5 482-500 inch all aluminum engines in a row, a few old school builds are welcomed.

Here is a 427 S/O LR build that I did for Matt Moore, a forum member in the UK.  I think I posted the dyno results a while back, but I didn't post any pictures that I can remember.

This was an NOS 427 block, and we used a 391 crank that Adney cut for me.  The heads were ported C3 LR heads, and the LR 2x4 intake was modified as well.  Oliver 6.800" rods, Race-Tec pistons with .043/.043/3mm rings, and a Bullet solid flat tappet cam 255/263 @ .050", .640/.640" lift, 106 LSA on a 102 ICL.  Compression ratio was a little over 11:1.  The carbs were custom built by my carb guy, a pair of 600 cfm Holleys.  Even running factory adjustable rockers and a dual points distributor.  <img src="/images/happy.gif" height="14" width="14" alt="happy.gif">

This one made 510 hp @ 6000 and carried it all the way to 6500, only losing 5-6 hp there.  Torque was 511 lb-ft @ 4200.  The Stuska dyno that I use is a little on the conservative side and compared to other DTS and Superflow dynos, we usually see about 5% difference on peak hp results.












I'm currently working on four other old school pieces. 

1.  If you're ever around the Columbus, OH area, I would suggest stopping by Boss Cars in Gahanna.  It's pure pleasure for any Mustang fan.  Boss 302's, Boss 429's, GT350's, GT500's, you name it.  A forum member, Grant Hukle, is having them restore a GT500, and I ran up there to pick up his 428CJ to build.  It will be showroom-correct on the outside (down to the 78lb intake manifold), but is getting treated to a hydraulic roller and some other updated parts inside.

Just ordered some Ferrea valves for the heads and I will post some flow numbers on the heads with an updated valve job.  Will be dyno'ing the finished engine as well, so it will be cool to see some 428CJ numbers.

2.  Rick Bagley isn't a member here, but is a member on some of the Cobra forums.  He lives here in KY, about 35 minutes from me and has a 427 that I'm rebuilding for him.  He had a leaky intake gasket and while he was in the motor updating things, found out that he had a broken ring that was scuffing the cylinder walls pretty badly.  He took this time to completely freshen the engine up, with a new solid flat tappet cam from Bullet (240/245 @ .050", .620" lift, 108 LSA), new Diamond pistons, and new Scat rods. 





It will get prettier, I promise.

The top end is a set of Edelbrock heads and a Blue Thunder intake. 

3.  Next up is a new/old build for forum member Gary Veres.  Gary has a set of Tunnel Port heads that hit a pretty good lick....about 345 @ .600".  They're going on a new Pond cast iron block, 4.310" x 3.980" using a new forged RPM crank with BBC rod journals.  Running Lunati H-beam 6.800" rods, custom Diamond pistons, a custom Total Seal .043/.043/3mm ring package, a Bullet solid flat tappet cam, and a TP 2x4 intake with a set of our Quick Fuel 2x4 725cfm carbs.  We're going with some more modernized pieces on the top end....T&D rockers, MSD distributor, etc. 

I think I'm looking forward to this build the most...



4.  Lastly is an old 352 that I'm doing for myself.  I bought a complete running core from James Hunter, a forum member in WV.  Believe it or not, I'm going to dyno this puppy as it sits with all the factory parts on it.  Past that, I'm going to keep a tight lip....I've got some big plans for it using the factory stroke, C6AE-R heads, and some other goodies. 





Brent Lykins
B2 Motorsports, LLC