Undead Sleds / Rat Rods Rule - Hot Rods, Rat Rods, Sleepers, Beaters & Bikes... since 2007!

Undead Sleds / Rat Rods Rule - Hot Rods, Rat Rods, Sleepers, Beaters & Bikes... since 2007! (http://ratrodsrule.com/forum/index.php)
-   Builds! (http://ratrodsrule.com/forum/forumdisplay.php?f=21)
-   -   I'm Gonna Build A Dragster! (http://ratrodsrule.com/forum/showthread.php?t=7539)

Dirtyrat 01-15-2014 10:05 PM

Wow, this is a huge difference with the .300 dish to flat tops...
I imagine some testing is going to happen to see how close the valves are to the new pistons then?
One of the motors I built I used clay on top of the piston to verify lift and clearance with the valves using flatter pistons than stock..

Gulf Rat 02-02-2014 08:15 PM

That's a great build, think I might look into building one...

Gulf Rat

bob w 02-21-2014 08:35 PM

http://i256.photobucket.com/albums/h...Porting006.jpg
The block has been bored and honed. I brought it home so I can partially assemble it and check piston to deck clearance. It will go back to the engine shop to have the head surface milled to create a good quench with the head.
Received the oversize valves and screw in studs today. That prompted me to try a little bowl and combustion chamber clean up. I haven't ported heads since 1964 so I am being very conservative. Better to do too little than go too far and ruin the head or actually reduce performance.
DR, I tend to use pretty mild cams but I will use clay to make sure there is ample clearance between the pistons and valves.

bob w 02-25-2014 04:47 PM

I checked the deck height and found the piston in the first cylinder .013" down. Put that piston and rod in the number six hole and it was .024" down. The block will have to be milled on a taper to get zero deck height front to back.
Also dropped the head off for screw in studs and oversize valves. A .030" mill on the head will produce 11 to1 compression ratio.

A couple days ago my computer screen suddenly said "good bye" and shut off, followed shortly thereafter by that smell of electronic components frying. Smoke curled from the grill of the box. I'd say it's well done. I'm now very slowly navigating around an iPad.
Sure hope the thousand pictures in the cooked computer can be recovered.

Dirtyrat 02-25-2014 05:28 PM

Does that seem odd to you that they are different?
Are the rod journals the same size?

bob w 02-26-2014 10:53 AM

DR, It's not uncommon to find front to rear variation on the deck, especially on inlines. This one was a little extreme though.

Old Iron 02-26-2014 02:27 PM

Quote:

Originally Posted by bob w (Post 378423)
DR, It's not uncommon to find front to rear variation on the deck, especially on inlines. This one was a little extreme though.

Every 400 Gm small block, I've built, is .011 taller deck height from one side to the other.

LarryJ 02-27-2014 09:17 AM

Hahaha really? you hide pieces around? My wife would be glad if I did instead of keeping all the junk in our garage... maybe I will give it a try!

I am excited to see how the project comes out!

bob w 05-05-2014 08:46 PM

http://i256.photobucket.com/albums/h...CamGear002.jpg
All the machine work is done and all the parts have arrived. The cam timing gear is an interference fit on the cam. I have been putting off assembling the gear to the cam because I have heard of failed attempts. But, I have to get on with this project. Put the aluminum gear in the oven at 300 degrees for a half hour. It pushed on about a third of the way by hand and I was able to tap it the rest of the way with a short piece of pipe and a hammer. Went nice and straight. Even though my setup looks crude be assured no cam lobes or bearing journals were harmed during the assembly process.

vintageT 05-05-2014 10:19 PM

Very cool build! Being a Mopar guy I wish you would have stayed with the slant, but I also understand the need for mo power!


All times are GMT -5. The time now is 10:46 AM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Rat Rods Rule Inc.