I got a 390 in the 9.60's with out N.O.S or any other brand of N.oxside.....

I think if he build's it to the spec's i put up there with the gear's I sugested he'll prolly hit 10.20's or 10.10's.......

then you add the 200shot should hit mid to low 9's...

He should hit the 9.90's at bare minimum....

3.73's for 10's or if its a street car.....

4.11's if he want's healthy 9's.....

It can so be Done......

But with that setup he should hit the 500HP he want's........

Well 480-520hp on engine......

680hp-720hp with go go juice....


it wil have aplenty of HP and RPM but i think it might lack the torque........so gear it

 

I don't see anywhere near a low 10 second e.t. with only 500 HP. With good suspension and traction (which shouldn't be a problem with that car) I'd guess a 500 HP small block would run 10.90's or so tops. Now if you're talking rwhp that should be a mid to low 10 second car.

Jody

 

Thats why i recomend a 200shot...........

my AMX only had 510hp ran 9.80's........

then with TBI's it dropped the E/T's Down to 9.60's consistantly....

that was maybe on 575hp-595hp............

But then again we are comparing a 390AMC to a 350 chevy..

Apples to orange's......


But with a 150-200 shot he could do it.......

or
be darn close..

 

Having trouble with that one too, unless your car weighed 2400 pounds or so, or you're talking rwhp. Your car is obviously very light to run that good on that amount of power, much lighter than a normal drag car. How much does his car weigh?

Jody

 

2800LB's with driver and fuel.
9.63@143mph with 1.352-60ft.......TBI.

9.86@139.98mph with 1.392-60ft.....Carbed.
2800LB's with driver and fuel.

The 510hp was our Guess......

It could have been more....

580HP@7250rpm & 632TQ6750rpm@Flywheel Carbed......
Never got dynoed when it got the TBI setup.....

I was guessing about 510ish at the wheel's....

4spd close ratio "Rock Crusher" 4.44:1 gear's with 28x12r15 slick's....

But hell that was the late 70's and early 80's when it was pulling 9.80's.........

retired came back for some fun racing summer2000 with the TBI setip runing the 9.60's.............

New set up should yeild 9.20's But i'll be happy with 9.40's.........
But that 4 year's away from completion.. it will be flywheel & wheel dynoed after that build....

--Mikey

 

Good running car! I'd say you were closer to 600 than 500 though. Probably in the 575 range to run that mph at that weight.

Jody

 

Still 9.60's at over 140mph in the 1/4mile ain't bad for a
69 s/s AMX with a 390 4spd....

and if i can do it with a 390AMC i am sure he can do it with a
350 chevy.......

 

1969 S/S AMX DRIVE LINE BUILD:

ENGINE:
390AMC bord .040 over, 9.2:1 c/r, Dual procharger’s with crossram intake, Indy racing head's, 307*Dur.625Lift cam, 2-900Cfm 4bbl Holley TBI's.

EXHAUST:
1-3/4"--1-7/8” headers
Side pipes3.5".

TRANSMISSION:
Stage3 clutch, close ratio 4spd.

DIFF/RATIO:
AMC20 rear-end 4.44:1 gear's.

TIRES/WHEELS:
28X12R15's in the rear.28"tall. TORQUE THRUST D'S 15X8.5.

245/50R15's in the front.25.5"tall. TORQUE THRUST D'S 15X8.5.

ESTIMATED E/T:
9.20’s - 9.40’s.

 

is this 350 for a class limit? I'd take 400 block and destroke it to 352 and use an SB2 top end on it. that's good for well over 800 HP but I don't know if you have any limitations or stuff like that, I do most of my racing outside the track. NASCAR 358s make over 700 HP with 390 cfm induction though so anything is possible lol

 

760hp on 390CFM????? thats it they only are running 390cfm??

 

I think they're just under 500 HP with the restrictor motors; the others make well over 700 HP.

Jody

 

every nascar motor is supposed to be 700 HP with restrictors cause with a big 4 barrel and no restrictors they are 850+

 

I'm not totally up on Nascar anymore, but a few years ago they hadn't even reached 500 HP on the restrictor engines. That's why they are so much slower to accelerate than the other engines, they don't make nearly the power. I can't imagine in 2-3 years they've added 200+ HP just through technology.

Here's an excerpt from a quick search I just did on restrictor plates:

"So how does Nascar deal with this ? Restrictor plates which choke 300 horsepower from all the
cars. That certainly keeps the cars from flying but it also forces the cars to draft together in a pack
unable to pass a car unless they do it in tandem. That sounds to me like a prescription for a
multi-car crash. When some Ernie Irvan wannabe gets frustrated and decides he has to pass the
pack the next picture we see is a 20-minute yellow flag. That’s absurd, but it’s a fact of life in the
restrictor plate races.

It bothers me that our Super Bowl has to be run with these ridiculous restrictor plates. There are
many other ways to slow the cars down to where they don’t become airborne. I’ll talk about some
of the simplest and cheapest ways in a future column. Trust me. "

Jody

 

Good stuff.........

 

I don't have an exact answer for you but I do know it is possible. Just like it was said previously... it's gonna cost alot because you are going to have to get all the best of the best parts.
FYI, I plan on having my 383 produce around 500 HP and about 420 RWHP plus a 200 shot of spray on top of that.

If you got the $$$$ then good for you and enjoy the build up but if you don't, then go big block route....