Stock 103 first engine mods?

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Sep 7, 2016 | 01:24 PM

checkster2000

Thread Starter

Cruiser

Joined: Aug 2015

Posts: 100

Likes: 32

From: Harford Co Maryland USA

Stock 103 first engine mods?

Stock 15 street bob besides pipes, air cleaner, fp3 tuner. If I was going to mod the motor what's the best bang for the buck? Not sure....I'd say cams, but typically on car engines that I've built you might as well do the heads also to see their full potential. Not sure if stock ported heads or just get screaming eagle. And if go that far am i getting into new injectors and intakes...etc. dont wanna go hog wild as....been there done that in the past. Any suggestions or constructive criticisms would be appreciated.

Thanks,
Tom

Sep 7, 2016 | 01:38 PM

Frédéric CM

Road Captain

Joined: May 2014

Posts: 555

Likes: 39

From: France

best bang for the bucks would be bolt-on cams, like andrews 48H or 57H

Sep 7, 2016 | 01:42 PM

Scott B.

Cruiser

Joined: Nov 2015

Posts: 189

Likes: 10

From: Frederick, MD

It depends on the lift and characteristics of the cams you want to add. Some perform better with stock compression ratios and others run best at 10.5:1. Cams only if you want to go mild. Add heads or headwork if you are going with cams with enough lift that they require head mods, and then high compression pistons if you are going to use cams requiring them. My dyna has all of the above plus some, my fatboy will be a low compression build.

For a single mod - moderate cams will be something you can feel.

Sep 7, 2016 | 02:51 PM

Ghost_13

Grand HDF Member

Joined: Jul 2016

Posts: 4,384

Likes: 8,741

From: Texas

Get a proper dyno tune

It'll wake the motor up..., maximize the stage 1 stuff..., give a solid baseline from which to build

=============

As you upgrade don't forget the drive line

Ghost

Sep 7, 2016 | 03:00 PM

martinj

Club Member

Joined: Mar 2016

Posts: 11,674

Likes: 22,156

From: Clearwater, Idaho

I would suggest looking at some dyno sheets for the Cycle Rama 570 cams. My research indicates that these are probably the best bang for the buck for a stock or nearly stock engine. Impressive bottom end torque with a really good peak at stock compression, even better with a .030 head gasket. A set of these is going to be my winter project for my Lowrider. Check them out.