View Full Version : Help on ump motor
01-18-2011, 05:29 PM
Getting ready to build a motor for a ump street stock needing some help or other racers opinions...........i have a 383 stroker bottom end with eagle crank and eagle rods.....150 thous. Dome pistons.........what im wanting to know is im looking to buy new steel heads debating on dart,world product....etc want to know what other racers think is the best steel head on the market for power and price any info would be great thanks in advance
01-19-2011, 08:11 PM
Dart or RHS heads with 200 to 215 runners. With a 4412 motor you want your compression around 13.5 to 14.5-1! Should be a nice motor for this class! You'll be competitive with the 400+ c.i. engines if your in the Central IL area!
02-18-2011, 02:31 AM
I have dart 215 on a 4412 I think they are a bit big... But I have heard od those with brodix running upto 220... RHS makes a decents head. But you cant really go wrong with dart/RHS/brodix... HAve them surfaced down or milled to make a smaller combustion chamber to get your compression up to at least 13, or your wasting your time... Dart makes a 215 CC runner 49 cc head not sure of the clearance but that would be some cserius compression...
stock car driver
02-18-2011, 08:12 AM
Dart 180 or ported double humps or vortecs unported.
200 and 215 make more power on the dyno but dont respond as well and make way less tq.
humps and vortecs are 45# lighter than dart so they are my choice on all my motors but one.
Ive got a 14-1 383 with eagle h beams, steel crank, wiseco domes etc. 280 dollar champ pan with lots of gates etc. has humps on it and weind intake roller rockers. 3 total nights on it. $2500 complete.
Powered by vBulletin® Version 4.2.0 Copyright © 2017 vBulletin Solutions, Inc. All rights reserved.