Doing some research on a cam choice and the 57h seems hard to beat for my riding style and setup on my engine which is just a TTS and stage 1. Ive read some post saying that the pre-Rushmore 103 engines could use a little more compression for this cam... anyone with experience with NON-Rushmore 103 that can add some input?
Lots of guys running them with stock compression and loving them. I did the .030 head gasket when I did mine. 98hp and 111 tq at 95 degrees and 55% humidity. On a cooler less humid day it's 100 hp or better. So far I'm lovin it.
So changing out the head gasket gets the compression up... What does it put the compression at roughly? Also, does the cam start pulling pretty early? I ride pretty aggressive so not to worried about pulling super low rpms because im only there for a split second
The factory head gasket is .045 thick and when you put the .030 head gasket on it bumps the compression up from 9.9 to 10.1:1. Factory compression is 9.7:1 so your raising it much. There is no doubt it pulls hard to 100 ish mph and I honestly don't know where it falls off past that. I also like to ride hard and so far I am very pleased and not in any way disappointed. It cruises really nice and very drivable around town but rock and rolls when on the throttle.
I was in a really big hurry to get home last week from North Dallas to central Louisiana about 350 miles. I rode from 80 to 100 mph the whole way with no problem. I also got 35 mpg considering I drove it like I stole it.
I have the 57H cams with stock compression. Mine pulls good at least to 120 mph. I have a high flow intake and exhaust with a Thundermax tuner. Cams work great. Cams com on about 2400 rpm.
The .030" head gaskets make quite a difference surprisingly. One of the guys just added them with no other changes and should have dyno numbers before and after (once we return from Alberta).
Also, do I need to get any other upgraded parts for the clutch or oiling system? All that stuff is stock right now. I won't be doing the work but would like to get opinions from multiple sources besides the Indy
I would definitely replace the lifters and cam bearings. Super easy and big difference in stock lifters vs S&S. Big difference in the stock cam bearings and Timken bearings.
If wanting a plug and play cam, then a Cyclerama .570 or an Andrews 48 would be 2 great choices.
We set the Andrews 57's at 10.2 cr.
Scott
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