Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Another blower question
View Single Post
  #13 (permalink)  
Old 01-23-2013, 07:00 AM
496CHEVY3100's Avatar
496CHEVY3100 496CHEVY3100 is offline
Built Not Bought

Last journal entry: 53 ad3100
Last photo:
Join Date: Jul 2012
Location: Appalachia GA
Posts: 1,002
Wiki Edits: 0

Thanks: 1,752
Thanked 1,114 Times in 769 Posts
Originally Posted by techinspector1 View Post
I'll bet your Comp "blower cam" is cut on a 114 LSA. Read this from Blower Drive Service...110 works best for gasoline...114 works best for ALCOHOL...

"Choosing the proper camshaft would be the most important requirement for a blower motor. An improper cam will cause a variety of problems that can easily be avoided by following a few simple guidelines. Hydraulic cams are recommended if you intend to drive the vehicle frequently, requiring little or no maintenance, and the maximum engine RPM's are kept around 6500 or lower. Roller rocker arms are recommended. Flat tappet and roller cams are recommended for high performance applications especially where the engine will see high RPM's. Exact camshaft specifications vary depending on the performance level you wish to attain. BDS offers different types or stages of cam grinds specifically made for blower motors. Refer to camshaft specs listed in tech info for BDS' individual engine camshaft specifications and their intended uses.
If you wish to purchase your cam from one of the many fine camshaft manufacturers, we suggest using our camshaft specs as a guidline. Extremely high lift and long duration cams are recommended for high RPM, high performance racing only.
The lobe center of the cam will play an important role in determining the performance characteristics of an engine. Wide lobe centers (112 to 114 degrees etc.) will create higher cylinder pressure providing more horsepower with cooler burning fuel such as alcohol and methanol. We have found 110 lobe centers to produce the best overall power on gasoline.
Whatever cam you choose, make sure that it will operate and perform properly in the RPM range required for your application."

I don't know what it is that makes you guys jump up and buy the cam as one of the first items. Cam and torque converter should be the last 2 items bought, after you've finished the drivetrain and everything else.
Thanks Mine is 110 lc hydi do have roller rockers& All matching parts and only 540 lift ,the alum heads i buught are good up to 615 lift as recomended by comp far gas ,114 for alcohol, compresssion is 7.9 converter is 26 00-2800 from B&M for big block app,all i want is the whine of 671 ,will nerer be raced exept to gas station ,lol,probable never over 5000 rpm. just want look and sound thanks for advice.. i had the converter still in box 4 yrs and blower before i bought the engine

Last edited by 496CHEVY3100; 01-23-2013 at 07:12 AM.
Reply With Quote