Jordan Ruddick

Hello I have a 350 tpi with aluminum dart heads the runners and manifold are ported but I was wondering what’s a good cam for this setup?

ULTM8Z

What are your goals for the car? That'll probably dictate a lot...

Jordan Ruddick

I’d like good power but the cars mostly for driving around town

Komet

This is the best TPI cam and I'd love for someone to tell me otherwise because I picked it based on the numbers looking good, and by numbers I mean duration and lift because I don't understand valve events:

https://crower.com/chevrolet-hydraul...mshaft-66.html

ULTM8Z

I'm running that cam in my 383. Fantastic street cam.

Idles really smooth (16 inHg vacuum in gear at 650 rpm) but tons of streetable torque and pretty decent upper RPM power too (though I'm running a Miniram so the short runners help there too).

But for a TPI 350, I would wager its a great cam for the street as well.

Keep in mind youll have to do some tuning to get it to run well though.

BadSS

What’s the compression? Which Dart heads, is it a stock or aftermarket ported base, what runners were ported (if SLPs were the dividers cut back and by how much), and what headers, exhaust pipe diameter, and muffler? Also what type transmission, stall speed if applicable, and rear gearing.

91banditt2

iTrader: (1)

I'm running a factory 1994 LT1 cam in my 350, specs are simular to the Crowler cam, and it's cheaper
87-94 SBC/LT1 Camshaft TPIS ZZ409 Hydraulic Roller Camshaft - Hawks Third Generation (hawksmotorsports.com)

Jordan Ruddick

they’re 200cc aluminum heads the intake and runners are gasket matched ported the intake itself is the older style for the bolt pattern I haven’t gotten exhaust yet the trans is a 700r4 and I haven’t decided on a stall. Also the rear is a stock 2001 Camaro rear and I did forget to mention the block came out of a Silverado which I’m pretty sure is flat tapped

BadSS

What year Silverado (to figure compression and cam type)? Is the ported base, stock or aftermarket? What type runners? What gears are in the 2001 rear end?

Jordan Ruddick

1987 the base is stock older tpi with the older bolt style and stock runners with gasket matched porting and Idk the specifics gears I just know it came out of a z28

BadSS

If it came out of the half-ton it should be 9.25 or 9.3:1 compression. The block should have untapped bosses for the roller cam spiders but you are right that it cam with a flat-tappet hydraulic.

The most common gear for the automatic z28s was 2.73s but there was an option for 3.23s. The rear gear for the manual z28s was a 3.42. There should be a tag on the rear end to be able to tell for sure.

Your biggest bottle neck is the stock runners, but the AZ Speed and Marine large tube runners are over $500 shipped. SLPs are hard to find and those require extensive porting. Don’t know if that’s in budget. Whether you stick with the stock runners or plan on going aftermarket will have a major factor in determining the cam.

You could tap the bosses in the lifter valley and run a hydraulic roller, but that adds a good bit to the budget. You need to decide if that’s an option or if you’re going to stick with the flat-tappet.

Also need to know if you’re planning on going with an aftermarket torque converter. The better ones are expensive and the lower cost ones typically don’t stall more than 2400 or 2500 rpm.

Probably the biggest factor on the cam selection is whether you plan on getting the equipment to burn your own chips.

Fast355

iTrader: (2)

Good luck with that! Moates shut down. Probably have to find a used setup if you want to do that now.

Personally I would go 0411 with 5.7L Express van electronics or 24x coil per cylinder.

Tuned Performance

iTrader: (92)

https://www.hamotorsports.com

You can get chips and burn2, red Devil River has a piggyback adapter

https://www.ebay.com/itm/11419198720...mis&media=COPY

Bills87IROC

Why would you install a LT1 cam in a TPI 350 when they're almost identical in duration and lobe separation angle, just a tad more lift?

newbvetteguy

With the likely lowish CR and numerically small rear gears AND the over-sized heads for the application, I like the Comp XFI 260/270 cam with 1.6 rockers (throw that valve open fast and far). .560"/.555" lift 113 LSA. You'll save $340 on the cam kit if you can use an OEM-style cam and roller lifters vs. the retro roller version. You could step up to their 268 cam potentially, too, but do the DCR calcs first.

You're held back by the airflow of the stock TPI intake. A FIRST intake will get rid of the flow bottleneck in a major way and is about $1,100 all in.
An aggressive lobe like an XFI plus a good, high velocity header can help "tame" the 200cc heads. (And unfortunately that's not a very high-velocity 200cc head either so staying conservative on the cam size and getting a good header, IMO, seems like a very good idea(although with how little overlap there is I'm not sure how much a fast header helps.)


Adam

BadSS

If the OP looks at this thread again, I'm going to assume a lot, which I normally won't do, on a cam recommendation.

First, I'm assuming you'll go with a flat-tappet hydraulic. If you're running a MAF system, while tuning would be best, the cam below would work well without HAVING to tune. Anything I've done a cam swap on has been MAF, so I'm not sure if the cam will "work" with a speed density system without tuning. I'm going to guess you'll need to get the stuff to do it yourself or have someone tune it.

Also assuming the Dart 200 aluminum heads came assembled wit the .510 max lift hydraulic springs - if not, you'll need some 981-16 springs.

Summit has the 254/260, 210/218-111, "4x4" cam for $160 and the cam and lifter kit for "only" $240 which is a pretty good value as opposed to buying them separately.
https://www.summitracing.com/parts/c...make/chevrolet

You really need to get a set of 1.6:1 rocker arms to get the cam lift up (.477"/0.493") where you'll be able to get as much as much airflow as you can from those heads, which as Adam said are a little lazy when comparing flow to their volume.

If you're going to go hydraulic roller, the cam Adam recommended would be a really good choice.

Tinbender59

I use and like the Lunati Barebones cam here ( https://www.lunatipower.com/barebone...4-276-286.html ) Hydraulic Roller Cam. Fair idle, great low to mid range power for daily usage. Works well with tune port injection. ;Advertised Duration (Intake/Exhaust): 276/286 ;Duration @.050" (Intake/Exhaust): 218/228 ;Gross Valve Lift (Intake/Exhaust): .503"/.503" ;Lobe Separation: 112 ;Intake Center Line: 108 ;RPM Range: 1800-5800 ;Cam only included.

at the dyno with the LTFT all over the place, Tuner couldn't figure it out???? but still charged me $500. Anyway. She put down 387 ft tq at 2000, and 268 hp at 4600, stock 5.7, alum heads and headers, 1.6 rockers to give a total lift of .530/.530, dang solid if you ask me. Just remember TPI is a torque builder, if you want horsepower go with a Holley carb or LS.