I want low to mid range.

Using a Hydraulic flat tappet casmshaft?


Or would a Cam like this would work for me?

Operating Range: 600-4600 RPM
Duration Advertised: 250° Intake / 258° Exhaust
Duration @ .050'' Lift: 206° Intake / 214° Exhaust
Valve Lift w/1.5 Rockers: .432'' Intake / .453'' Exhaust
Lobe Separation Angle: 111°

this cam here is a hyd flat tappet.
Thanks

 

That would be a good cam for a mild street car.
Also, while mild it would make for realitively easy tuning.

 

You left alot of grey area. What is the vehicle, use, engine size, induction, heads, exhaust, transmission and gearing setup, etc.

 

I knew a fellow CT member would post lol.

Vehicle: 1993 Chevy Silverado

Use: Daily driver and towing & Offroading adventures

Engine size: 385

Induction: Tune Port.

Heads: Pro Topline 64 cc heads 180cc angled plugs

Exhaust: headers to Y pipe to a single exaust

Transmission: 4L60E with shift kit.

Gearing: 3.42 Rear and front so far.

 

Do you have roller provisions in your block?

If so, for your use it is HARD to beat the PRODUCTION LT4 cam put out by GM in the 1996 Chevrolet Corvette Grand Sports. It is tame by any aftermarket standard, but will make some power when leaned on.

Duration @ .006 - 282/277
Duration @ .050 - 203/210
Lift w/1.5 rocker -.446/.449
LSA 115*

I built a 355 for my 1994 G10 and ran it for a short period of time before putting the Vortec run TPI on the 305, the 305 back in, and ultimately selling it. It was approximately 380 FWHP with TBI, stock LT4 cam, Dart Iron Eagle 180 heads, 2" bore 454 TBI, Edelbrock 3704 bored to 2", 1 3/4" x 3" headers, dual 2 1/2" exhaust, and a custom PCM tune based on the TBI $0D code. I will put it this way, fuel shut-off was 6,300 rpm and WOT shifts were at 6,100 rpm. With the P255/70/R15s and 3.42 gears, it would come out of 1st at 50 mph and 2nd at 95 mph. Under half throttle it ran just like any stock TBI 350 would. Mash it a little harder and all hell would break loose.

Keep in mind the LT4 was 330 Underated NET HP. The Dart Iron Eagle 180s outflow the LT4 heads (195cc intake ports) by roughly 10 CFM @ .450" lift and even more below that, the LT4 came without headers, and the Dual Plane Intake gives 30 ft/lbs more torque (according to GMPP with their old LT4 carbed crate engine)

Are you going to use the Vortec PCM? Makes for a really nice sequentially injected TPI setup. The Vortec 305/350 uses 19 lb/hr poppets (rated at 43.5 PSI), but runs them at 60 psi. That makes the Vortec 305/350 PCM ideally calibrated for regular 22 lb/hr 350 TPI injectors.

 

The cam you listed would be great for a daily driver. It should idle like a Swiss watch but give you great throttle response in low to mid rpm's.

For low rpm torque you want as much lift as you can get with as low a duration as you can get. Duration (and overlap) is what raises the curve. (However, more lift requires more duration, so it is a trade-off)

 

I agree, but I must add that this is exactly where a roller cam comes in handy. They allow for much faster ramps which help retain torque and build HP at the same time.

 

FWIW, I dug out the dyno sheets on the engine above. Run 1 is through the mufflers, Run 2 is through the cut-out. These are 2nd gear runs with "persuasive" chip burn to make it hold 2nd gear down at very low enigne speeds.

 

111 LSA is a bit low even on a 385CID 115LSA is much better

 

Roller cam setup.... I like, but for a retrofit Yikes! They are great but it costs what 800 bucks to get a retrofit right?

Hell If im going to dump money into this block might as well retrofit a roller cam.

Fast355 I know everything about your Van from Chevytalk.

If any of you seen S10wildside post about his conversion on his test engine Thats exactly what I plan on doing... Except I wont be running stock.. must be modified lol

 

I actually did the SFI conversion before S10wildside did, using a harness and PCM from a 1998 Express to run a TPI 305 in a 1994 G10. (I even fabbed an adapter out of a chunk of aluminum to adapt the linear EGR valve to the TPI intake)

https://www.thirdgen.org/forums/dfi-...tec-truck.html

If you have a roller cam compatible block, the conversion is very cheap. I did mine for under $200.00. 45K mile LT1 cam with 16 roller lifters, pushrods, cam retainer plate, lifter link bars, hold down spider, and misc bolts= $120.00shipped to my door from Ebay. The double roller timing chain was another $40. Then the intake gasket, oil pan gasket, timing cover gasket, and timing cover seal added another $60.00 or so. I also swapped to comp 981 springs at the same time.

For example, here is what you can get just by looking. I know it is used and the cam is not even close to use-able, but rollers don't typically wear.

eBay Motors: Small Block Chevy Roller Cam Complete Setup - NR!! (item 220036755638 end time Oct-16-06 19:00:00 PDT)