Sorry Charlie but it looks like they are not available. Of course if Ted wants to I might be able to run them up for a day. Im having a hard time parking the truck.

Kenny  Onalaska, Texas

Kenny,

Since your truck is up and running, does that mean the Red's Headers won't be a part of the big test?


Lawrenceville, GA

The pistons are .003 in the hole. compression is 9 to 1.  cam 4 degrees advanced.  using the truck timing chain.

Kenny  Onalaska, Texas

Wayne. That particular combination was not tested without the mufflers on the EMC headers. On stock heads or low compression engines, that paticular set of headers does quite well with the muffler in place but tends to drop off in overall performance with the mufflers removed. Header tubes as well as the collectors are on the large side and the mufflers are the crutch for this.

.

Here’s the link to the thread covering the muffler versus no muffler testing in more detail on a variety of other engines though.

http://forums.y-blocksforever.com/Topic51508-3-1.aspx

Lorena, Texas (South of Waco)

hey ted, did you check the ecm headers without the mufflers, did the numbers drop?

 lincoln/merc. y-blocks &mel's                                                               bucyrus, ohio.

Thanks Ted,

I figured I was in that ballpark, the only other differnce is I am using the 1.54 ratio rockers.

55 Vicky & customline

58 Rack Dump, 55 F350 yard truck, 57 F100

59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?

The dyno can be programmed to go as low as 100 rpms to start test pulls but the camming, carburetion, and compression ratio on an engine typically dictates where to start the dyno pulls.  With the 228/238° camshaft, the dyno pulls were started on the 301Y at 2500 rpms simply to keep from loading the engine too heavily at the start of the pull.  The lower the rpm start point, the harder it is on the main bearings from a loading standpoint.  Same is true for this same engine in a car as you really don’t want to begin a full throttle acceleration run in high gear starting at  a point lower than 2500 rpms.

Lorena, Texas (South of Waco)

The cam in the 301 that was dyno tested is installed 4° advanced.  Best Gaskets were used.  Heads only had enough taken off of them to clean them up.  Some of the other details escape my mind right now but the engine was essentially a stocker with a pump gas friendly compression ratio.

Lorena, Texas (South of Waco)

Hey Ted, Where did you get my engine? I thought it was in my car in the garage, I guess I better go check.

Nearly Identical to what I am running except for the cam I have the Clay Smith C-272-8-B which I believe is on the same 110 centerline, Just a minute, let me go get the card. Hmmm don't say the lobe centerline but it is a 224* @ 50 duration .446" lift on both intake and exhaust.

I decked to .010 in the hole with .030 off the heads. Best gasket, and the rollmaster advanced 4*. How much in the hole are you on this engine and has any been taken off the heads and is it using a best gasket? Cam strait up or what?

Just curious because this is a real close setup to mine.

55 Vicky & customline

58 Rack Dump, 55 F350 yard truck, 57 F100

59 & 61 P 400's, 58 F100 custom cab, 69 F100, 79 F150, 82 F600 ramp truck, 90 mustang conv 7 up, 94 Mustang, Should I continue?

I noticed that the graph starts at 2500rpm. Does the dyno work at lower RPM? I've only heard that tri-Ys are excellent for the street. Looking at the graph, it doesn't seem to be the case but perhaps it is stronger than the others below 2500rpm and we just aren't able to see it.


Lawrenceville, GA