Thumpr Cam Dyno (Full Version)

http://www.powerperformancetv.com; Dyno pulls with the latest Thumpr™ Small Block Chevy Camshaft from COMP Cams®

Category:

Autos & Vehicles

Tags:

• COMP
• cams
• Auto
• Camshaft
• Thumpr

[skrewdriverhayden]

Hey guys. Im not a mechanic and I am looking for a cam for my 355 that sounds good and wont take away from my reliability/drivability. I have a 3000 stall and 3.73 gears already installed. Someone said I could use the hydraulic version of the thumper without having to buy aftermarker springs or pushrods...is that correct? Please help me out

[COMPCams]

@skrewdriverhayden Your best bet is probably to call our tech help line at 1.800.999.0853. Those guys will definitely be able to let you know which version of the Thumpr will work best for your 355.

[surgicaltech2004]

Do you do anything with the chrystler 318?

[COMPCams]

@surgicaltech2004 Yes, we offer both hydraulic roller and hydraulic flat tappet versions of the Thumpr cams for 318 engines.

[dangerdan408]

Bought this cam, put it in an 11 to 1 small journal 327 with vortec heads, performer rpm intake and it sounded good at idle, but couldn't even drive the s10 unless the idle was raised WAY up and then...no lope...had 8" of vacuum in PARK and 5" in drive...they say it works with a stock converter? No way...it ended up costing me hundreds ~$900 to put a hydraulic roller in, buy tie bar lifters, valve springs, pushrods, timing cover button, etc, ended up out of cash and having to put a 270 magnum i

[COMPCams]

@dangerdan408 Stock converters can be used on a 350, but we do recommend upgrading to an aftermarket stall converter as this is will lead to better performance. Feel free to call our tech line at 1.800.999.0853 to discuss options for your S10.

[RacerRickxx]

I hope some of you guys never decide to mess with cars - some of you are dead wrong.

1. Increasing exhaust flow will almost always increase fuel milage due to a decrease in pumping losses. This is to a point however and is mostly dependant on camshaft overlap. Once you hit a certian point, you are actually blowing some of the air/fuel charge out of the exhaust.

2. Power and efficentcy go hand in hand. On a dyno an engines Brake Specific fuel consumption (BSFC) is computed .

[tamapalagi]

Before picking a cam keep in mind how you're going to drive. If you rarely rev your engine past 5500 rpms why pick a cam that makes peak power there. The cam is the single most importatnt part that determines how the rest of the car is going to be built. Bigger cams need more components to work well. Use the biggest cam that works well with stock parts. I built a 350 with qjet carb and intake,flat top cast pistons and a barely bigger than stock summit cam. I was very happy with it.

[V8rings]

Part2. The trick to using these cams on the street is to use the smallest port best flowing head 11 to 1 compression , advance the cam to about a 98 centerline. In this case we chose 416 casting 305 heads that were worked on. They flowed just slightly better than stock vortec heads but had smaller ports valves and combustion chambers. I used a shim gasket . We run the smaller of the thumper cams with the RPM intake and Q-jet. 439 HP @5300 and 482 TQ. @3600 Lots of low end and sound.

[V8rings]

Thought I would give my 2 cents worth. My name is David Kauffung. I did the Engine masters competion in Popular Hotrodding in 07' and 08' with a 305 small block chevy featured in the June 2008 issue. I have had the chance to rub shoulders with some of the best engine builders in the U.S. and has learned a little about cams from these great bunch of guys. I recently did a 355 SBC for a kid. Part 1

[Jonboy123123]

@bigorangetrucker lol ford guys

[bigorangetrucker]

I shit on chevys all the time.

I've seen more blown up chevy engine blocks than all other car makes engines put together. cracked water jackets, stripped main threads, did i mention the rotating assemblies cant keep it together.

I will give chevy one win for being cheaper to build than fords, but when it comes to building a durable race engine it's gotta be a Ford.

don't be pissed because my ryhme is better than anything you could come up with...