I have a 1998 1500 w/ 5.2L. Looking at getting a Fastman. Holley sent me a dyno sheet about what thier 52 mm will do for my truck. it shows about 21hp and 18ft/lbs at the flywheel. I contacted fastman about thier 50mm, but no one has gotten back to me. Does anyone have any numbers or putting one on, or better yet, a dyno sheet? I also have a high flow filter, and flowmaster dual exhaust to help it breath out, now i just need to get it in. Thanks for your help.

 

no dyno sheet to offer but just be aware that if you open the exhaust or the intake too much you'll loose some low end torque and fuel economy. it you want lots of top end power and dont care about mpg, then dual exhaust and 52mm TB all the way. next you should consider the heavy duty heads or the r/t's with 2.02's...

 

Ramchrgr88,

Could you scan in or post the Holley Dyno sheet that was sent to you?
I am sure some of us would like to see it.