Solid Roller Info for 496

70ss496 · Oct 24, 2006

I'm currently running one of Harolds Ultradyne 288/296 Solid Flat Tappet cams. The specs are as follows for this cam:
Duration @ .050 255/263
Lobe Lift .3600/.3706
Lobe Separation 107

Seat Duration @.020 288/296
Gross Valve Lift .612/.630
Valve Lash (Hot) .026

I'm wanting to make some more power and am going to have the motor out of the car this winter, so I'm thinking of upgrading to a Solid Roller. My current combo is below:

496 CI BBC
4.310 Bore
Scat Internally bal. 4.25 4340 lightweight crank
Scat 6.385 H-Beam Rods
SRP Forged 5cc dome (with my heads works out to be around 11:1)
8" Internal Fluidampner
Ultradyne 288/296 F7, Solid FT
#206 Oval Port Closed Chambered Heads
-Had a bowl grind
-Heads were port matched to the intake
-Valves unshrouded
Edelbrock Victor Jr Intake
"Box Stock" Holley 950HP
Sumped stock tank, -10 line from rear to front into a Carter 172 GPH mechanical pump, -8 to Carb.
Hooker 1 7/8" Comp Headers
3" Exhaust into race-flow flowmasters dumped in front of axle
Stock GM 502 Crate motor water pump
March Billet Aluminum pulleys
Factory Fan w/clutch
Power Steering
Power Brakes

ATI Built TH400
Full manual valvebody
Continental 10" Converter(the best I can tell it flashes to about 4000)

12 Bolt, 4:10 gears
Completely stock 30 year old suspension
Air Bags are the only thing, 0 in left and 6.5 lbs in right
28x10.50 Stiff Sidewall

Best pass to date is in Sig.

My current plans are to put a Solid Roller in, and a Edelbrock RPM AirGap, and if money allows an 8 in converter along with a HR AntiRoll Bar. I've actually got a little money to play with this winter instead of having a baby last winter put the Chevelle on the back Burner.

Does anyone have any Cam Suggestions, that they would recommend, or maybe somebody good to call to order from. I'm not really worried about street driving that is limited to a maybe once a week to a cruise or something. I'm really wanting to get this car going faster, how much power difference can a person expect by going to a solid roller.

I'm new to the Solid Roller game, can someone tell me all the parts I'll end up needing to convert and what they might have spent changing over?

Sorry this is so long, but lastly, does anyone have anymore suggestions to make more power.

Thanks,

Matt

Rmchevelle · Oct 26, 2006

Here's a comparison with Jeff65SS's 454 with Harold's 272/282

70SS496-----------Jeff65SS
60' 1.598-------------1.832
330 4.698------------5.047
1/8 7.349------------7.716
mph 92.01-----------91.69
1000 9.66-----------10.032
1/4 11.641----------11.987
mph 113.50---------115.48

Not sure how much of a weight difference there is between the two cars. Maybe Jeff will chime in.

blazerbob · Oct 26, 2006

Matt, I have almost brand new Hoosier Radial slicks 30X9's with only 5 runs on them. Same tires power Ron454 Nova to 9.91 1/4m. and he states flat hooks like it never has before! Also agree that your weak point is head. Again my choice would be same head as Ron454 in the AFR 305 with CNC chamber and with this change alone with good suspension, tire should get you into the 10's easily! Is that fast enough for ya?!

70ss496 · Oct 27, 2006

RMChevelle, it looks like we are running the same mph at the 1/8, however, I pick up 21.49 in the back half, where he picks up 23.79. He has me by 3mph, on the back half. But I'm running 3 tenths slower, why is this?

So is everyone in agreement, my best bang for my buck would be heads? And to check the fuel system?

Any more suggestions?

Would it be beneficial to flow my heads to see what I got, or would that be a waste of money?

Thanks for the help.

Matt

Bob West · Oct 27, 2006

Running that quick at only 113mph makes me think you lifted too soon. I think with my old 454 my best 60ft was 1.64 and it ran 11.78 @ 117mph with the same induction system (intake and carb) that I'm using now on the 505, the 454 did have 1.75" headers and a 10" converter.

69bowty · Oct 28, 2006

Hi Matt-
I talked to you at the Vamp race in July, I had the purple '69. For comparison here is my best pass to date, ran this on October 7th at the last Vamp race:

60'.....1.609
330....4.688
1/8.....7.309 93.26 mph
1000...9.599
1/4.....11.542 114.57 mph

I would guess you have alot more it your car, we have similar heads but you have more compression and a better cam. My engine is 489 cu in with flat top pistons, about 8.5:1 compression. I also have a Comp hydraulic cam. Good luck at the track.

Solid Roller Info for 496

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