BLK87Z

Hey guys I know this is a camaro forum and my ole 87 Z28 is long gone but I still have the 355 engine I had in it along with the PTC Raptor 700R4 all from circa 1999-02?

I have a family now and bought a pristine 92 Chevy Caprice TBI 305 car, bone stock for now.

I already have that '77 model 4-bolt main flat tappet 355 with flat top pistons and vortec heads that have been modified to handle .525 lift, self aligning comp magnum roller tip rockers that are 1.52 ratio, long tube headers for B-body, edelbrock perfromer RPM (not Air Gap) vortec intake, carb-tbi adapter, a bored 46mm tb, 454 injectors, 18 lbs of fuel pressure via a spring, and a TPI fuel pump.

Trans is a Raptor 700R4 from PTC with a 2800 stall convertor. Shifts very very firm, I love it!

My question is the current cam is way to wild for TBI ( comp cams 292/292 .501/.501 very radical), what cam would you suggest with the TBI and the convertor I have and weight of the car compared to a camaro? The convertor actually stalls with street tires to about 2100-2200 rpm. The rear is gonna have 3.42 gears installed in it soon as I get them. Its currently got a 2.56 gear LOL. I want to basicly make a nice cruiser I can take the family out in, with similar performance to the stock 96 Impala SS I used to have, but want to keep the TBI for ease of swap and good driving characteristics. Is this possible? Goal is like 330-350 FWHP.

Thanks,
Seth Robbins

morgsie

iTrader: (1)

I recommend EBL. Some guys have tuned some fairly wild cams with it.

ninetyone

iTrader: (2)

I recommend the compu-cam series of camshafts. Something with duration like 210/220 max.They will work well with your fuel inj. car. Also a custom tune/chip.

BLK87Z

Well with all my research and suggestions, its looking like this cam may be my best compromise, what do you guys think? Id like to find a cam with more lift on the exhaust, even more than this one, inorder to better match the flow of the Vortec heads as they are a little weak on the exhaust side.

COMP Cams Xtreme Energy Camshafts 12-256-4

Brand: COMP Cams Manufacturer's Part Number: 12-256-4 Part Type: Camshafts Product Line: COMP Cams Xtreme Energy Camshafts Summit Racing Part Number: CCA-12-256-4

UPC: 036584063278 Cam Style: Hydraulic flat tappet Basic Operating RPM Range: 1,200-5,200 Intake Duration at 050 inch Lift: 212 Exhaust Duration at 050 inch Lift: 218 Duration at 050 inch Lift: 212 int./218 exh. Advertised Intake Duration: 256 Advertised Exhaust Duration: 268 Advertised Duration: 256 int./268 exh. Intake Valve Lift with Factory Rocker Arm Ratio: 0.449 in. Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.456 in. Valve Lift with Factory Rocker Arm Ratio: 0.449 int./0.456 exh. Lobe Separation (degrees): 112 Computer-Controlled Compatible: Yes Grind Number: CS XE256H-12 Valve Springs Required: Yes Quantity: Sold individually.

BLK87Z

Well if I go with EBL, which there is a good possibility I will, can the current cam I have be tuned? Its a Comp Cams Magnum Hydraulic Flat Tappet 12-213-3 Specs:

Camshaft Specification Table
Part Number 12-213-3
Engine 1955-1998 Chevrolet
262ci-400ci
8cyl.
Grind Number CS 292H-10
Description

------------------------- ------------------------- ------------------------- -----

Intake Exhaust
Valve Adjustment 0 0
Gross Valve Lift 0.501 0.501
Duration At 0.006 Tappet Lift 292 292

------------------------- ------------------------- ------------------------- -----

Valve Timing At 0.006
Open Close
Intake 40 72
Exhaust 80 32

------------------------- ------------------------- ------------------------- -----

These Specs Are For The Cam Installed At 106 Intake CL
Intake Exhaust
Duration At 0.05 244 244
Lobe Lift 0.334 0.334
Lobe Separation 110