My Flat Tappet Cam Wiped Out So I Decided To Go Roller

[PlayingWithTBI]

Here is the whole article from March 2002:

Ahhh, OK on page 3 I see he's talking about the XE282HR, the one coming with mine. Thanks again!

 

[PlayingWithTBI]

Plus, with my heads, it'll be ~10.3:1 compression but, I'm staying with 1.5 guided roller rockers.

 

[L31MaxExpress]

Thanks but, that looks like a different article. The cam coming with this short block is 230/236 @0.050", .510/.520" with 1.5 rockers. IDK if it's a Comp Cams or not but, I found the same specs it here.

COMP Cams 08-432-8 COMP Cams Xtreme Energy Camshafts | Summit Racing

Free Shipping - COMP Cams Xtreme Energy Camshafts with qualifying orders of $109. Shop Camshafts at Summit Racing.

www.summitracing.com

Blue Print advertises it with 1.6 rockers, .544/.555"

GM SB Compatible 383 c.i. Engine - 436 HP - Short Block Plus

Description: HP & Torque: 436 HP / 443 FT LBS Compression Ratio: 10.0:1 Hypereutectic Pistons Cast Steel Crank Block: 4 Bolt main 4.00" bore Passenger side dipstick Align honed main bearing bore Cylinders honed on computer controlled machine to within .0002 straightness and roundness Cylinders...

blueprintengines.com

Thats a pretty big chunk of cam for a heavy truck. Whether that one will be better or the smaller one you have in the current engine is really going to depend on where you shift it. 700r4/4L60E transmissions do not like shifting much over 5,500 rpm without having been built with the heavy duty clutch piston return springs and a few other goodies.

I LOVE how my 383 pulls from 3,500-5,500 rpm and my cam is smaller than the one currently in your 350.

 

[PlayingWithTBI]

700r4/4L60E transmissions do not like shifting much over 5,500 rpm without having been built with the heavy duty clutch piston return springs and a few other goodies.

I don't know much about transmissions. The one I bought ~4 years ago has, according to Trans Depot;

Heavy Duty HIGH ENERGY Z Pack Clutch Set
Remanufactured Pump Assembly Which Includes 10 Vane Rotor Set, Teflon Bushing, Hardened Rings, 500 Boost Valve and All Recommended Updates
Superior Stage 2 Shift Kit
Heavy Duty "Upgraded" Sun Shell
29 Element Sprag (Heavy Duty) with Double Cage

HD Kevlar Performance Band

Bushing Kit (OEM Specs)
Hi Performance Corvette Servo
Heavy Duty 5 Pinion Rear Planetary

Will that work? With changing weights and springs in the governor, I have it set up to shift @5000 right now and may see about raising it some.

 

[Supercharged111]

You need 5500 minimum for the motor that just let go, I would think closer to 6000 with a 224 cam. I imagine the 383 with a 230/236 would be wanting the same.

 

[0xDEADBEEF]

He doesn't "need" it in the strict sense of the word. It will be leaving some meat on the bone though.

 

[PlayingWithTBI]

I would think closer to 6000 with a 224 cam

Yeah, I was in the process of getting my VE tables adjusted when the engine let go. I hadn't even tried any hard hits over 5K

 

[L31MaxExpress]

Mine does not fall off until about 5,800-6,000 with a 218/228 @ .050 although there is not enough meat to worry about going much over 5,800. At 5,000-5,200 you can tell its still pulling well. I love having that torque down in the 3,000-4,000 range though. I have been intending on setting the converter to lock WOT in 2nd gear around peak torque. Puts an additional 10-15 hp to the tires and stretches 2nd out a little longer.

xc_hide_links_from_guests_guests_error_hide_media

 

[PlayingWithTBI]

At 5,000-5,200 you can tell its still pulling well.

That looks good, we'll see when I get there. BTW, I see how your speedo sticks when accelerating.

I love having that torque down in the 3,000-4,000 range though.

Yeah, that too.

 

[PlayingWithTBI]

Well, I said "Screw It", and ordered the Blue Print 383 short block, it's 30 - 45 days out.

I just got a call from my rep at Blue Print Engines - my short block is ready and will ship either today or Monday.
Not bad, I ordered it on the 5th, it took only 12 days!