Cam Experts: Lobe Separation Angle?

-
RustyRatRod said:
"The rest of the car" a lot of times is overlooked in the quest for a fast/quick drag car. I knew a guy when I worked at the local Chevy dealer. Had a STONE STOCK 270 HP 350 in a 70 Nova. He's gone now, but he was a super cool old school racer and was still doing it and enjoying it with his 2 grown sons. That car was dead consistent in the mid 12s from what I remember. I think it may have even gotten some 12.30s. The car itself was set up right and yet it sounded like grandmaw's grocery getter. He said it was the most consistent car he had ever raced. He was always winning, too.
Click to expand...

Most cars are a 10 flat drive train tied to a 12.50 chassis = 11 second car. The good stuff 60's like a 9.5 car and runs 10.50 on an 11.00 drive train. Stock elim guys are good at this type of deal.

Light car - 68 A body, old school 214/224 .450ish lift cam with a really nice set of 915 iron heads running 11.50. It wasn't the engine that made it go. SOS with some posters, look at what someone can do that isn't the norm... 10's with exh manifolds, wide LSA cam... yeaaaaa!!! have a cookie. LOL A lot of things are possible with enough time, effort, money, desire, testing.
 
Sig Erson on LSA

img295.jpg
 
Newbomb Turk said:
Ok, on that day, with whatever weather he made about 370 hp. That’s about 1.05 hp/cid.

Again, unless he doesn’t have headers or the headers are junk he’d make more power with different cam timing.

Of course we only know what you tell us.
Click to expand...
With that MPH he should be mid 11's with just a small hydraulic cam on a wide LSA is a street car. Reminds me of Mike Jones' boat engine with the small duration and wide LSA that makes LOADS of torque.
 
I saw the dyno HP figures for Jones' boat engine. That must be the most generous dyno ever made...
 
Now the tinkerer in my wants to swap my 340 cam out for something with a narrower LSA just to see. I haven't even got the car on the road yet.
One thing that interests me is the variables that Erson mentions and how they affect performance with varying LSA. For example what happens when you have exhaust manifolds vs headers?
 
1MeanA said:
Now the tinkerer in my wants to swap my 340 cam out for something with a narrower LSA just to see. I haven't even got the car on the road yet.
One thing that interests me is the variables that Erson mentions and how they affect performance with varying LSA. For example what happens when you have exhaust manifolds vs headers?
Click to expand...
more exhaust duration and a wider lsa
 
1MeanA said:
Now the tinkerer in my wants to swap my 340 cam out for something with a narrower LSA just to see. I haven't even got the car on the road yet.
One thing that interests me is the variables that Erson mentions and how they affect performance with varying LSA. For example what happens when you have exhaust manifolds vs headers?
Click to expand...

I wouldn’t move the LSA just to move it.

That’s hard to do.

If you post your bore, stroke, rod length, compression ratio, where you want peak torque and power I’ll run some numbers.
 
Newbomb Turk said:
I wouldn’t move the LSA just to move it.

That’s hard to do.

If you post your bore, stroke, rod length, compression ratio, where you want peak torque and power I’ll run some numbers.
Click to expand...
Its a stock 0.040" over 340 with stock O head 2.02 intake valves, compression bumped to 9.75:1, Edelbrock RPM intake and AVS 650, stock hp manifolds. I'm running 3.55s and stock 14 tires with 3.09 low 4 speed. Its just a cruiser.
 
You must log in or register to reply here.
-

Back
Top