help with bbc

[joe1966]

hello everyone and thanks in advance
I'm running a 1972 Chevy nova with mini tub 410 rear gear turbo 400
engine 496 13:7:1 compression hydrolic roller with a victor jr intake with 1 inch spacer holly 950 which flows 1ooo cfm running 11.1 is my best time
I will be happy to get to 10.5 . I have the regular water pump will be installing a electric . also just installed evaluators didn't make any diff
oh yea just installed 3000 stall speed converter. comp 2 aluminum cylinder heads. with roller rockers. NO Nitrous. any thoughts or Ideas would be appreciated. I think I need to go with a bigger carb ? take the 1 inch spacer out?

[BEAST477]

A little more info is it street/strip or strip only? What does it weigh? Rear tire size? Transbrake or footbrake?

[Tod74]

What is a comp 2 aluminum cylinder head? :?

[signsbyesa]

corvette motor? :wink:

[Tod74]

No ...if it was a corvette motor he would be in the 9's already. You can run 10.50's in a dump truck if it has a corvette motor.

[joe1966]

OK its street/strip no cage yet was just a 454 engine bored 60 and stroked
just a foot break car right now
cam spec 520/236 intake 540/242 exhaust
msd 6al
tires m&h 28X12.50 15 street ets latter bars 4 link
weight 3200 with me in the car Ill see if I can post some pics soon
on launch can get the tires off the ground about 4 in ... don't laugh
again thanks in advance.

[joe1966]

pro comp aluminum heads
2.25 intake 1.88 exh
119cc rectangular port

[oldandtired]

pro comp aluminum heads
2.25 intake 1.88 exh
119cc rectangular port
What's the intake runner volumn?
Dave

[Tod74]

That cam is nowhere near big enough for a 496, especially one with 13.7 to 1 compression.

Is the 236/ 242 the dur @ .050? :shock:

If so with that much compression I'd get it up in the 270- 280 range.

[mopar1968]

Put a ''MOPAR'' engine in it. Trash the ''chebbie'' engine :!: :!: :lol: :lol:



''JUST MY TWO CENT'S WORTH''

[CamBirdRacing]

Dump some 116 race fuel and bump the timing up to 36, you'll go in the 10's then.

[blowninjected540]

Hold it to the floor full length of the track. :lol:

[ashbros]

That cam is nowhere near big enough for a 496, especially one with 13.7 to 1 compression.

Is the 236/ 242 the dur @ .050? :shock:

If so with that much compression I'd get it up in the 270- 280 range.

Tod74 has 2 very valid points.

1) Get that stationwagon cam out of that high compression motor and get something that will make your sack wonder what the heck happend when you smash the accelerator.

2) Is this a BBC corvette stroker motor with a 3/4 race cam? Just wondering.....

On a serious note,

I'd go 290 to 310 duration. Grow some hair........

Whats the lobe sep of your current cam?

How did you select the cam you have?

You running gas or alky?

HEADS? What size intake runners?

What size rockers you using?

Are the intake and Exhaust the same size?

What RPM you running out at the end of the track?

Theres a lot of great guys on RJ with a wealth of info to share and in the long run will help you improve your performance and save a few bucks,

Every once in a while we are all subject to have someone or everyone enjoy theirselves at your expense. Just consider it your friendly neighborhood of buddies who love to bust your chops every chance they get.......

Mopar, you might be on to something this chebbie motor is running like a mopar..... I think I would junk it too.................

[fla1976]

Have you checked the throttle to see if it is opening completely? Can't check it by yourself so have a friend hold it to the floor and see if it is opening completely. (Engine off, of course)

[TheYellaBrick]

11.1, is that with the engine running or you pushing it ? :P :P :P :D

[joe1966]

that's happen when I took the car out of the box for the first time.
been there done that. so yes we have WOT!

[joe1966]

its hydrolic roller now
any particular cam company

[ashbros]

I tend to use comp cams, but there a number of reputable cam manufactures to choose from.