Ok guys i have a 85 RS

i got it 2 weeks ago cam went flat and i found out it was just a 305(came stock with a 6) so im puting this in:

355
TWR forged pistons
stock rods and crank
GM 462 heads
454 lift cam 260 dur
EB intake
650 carb

desk top dyno says i should get around
336 at 4500 HP
416 at 3500 tq
it has 3.42 gears
what should i hit the quarter?

 

IMOP a 750 would do a lot better on that combo, should be a mid to low 13 on that combo.

 

Anyone else?

 

you left out 2 important things.

Whats your compression?

what is your cams duration at .050?

 

comp is ten and half

heres the cam info

Valve Adjustment 0 0
Gross Valve Lift 0.454 0.454
Duration At 0.006 Tappet Lift 268 268

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

Valve Timing At 0.006
Open Close
Intake 28 60
Exhaust 68 20

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

These Specs Are For The Cam Installed At 106 Intake CL
Intake Exhaust
Duration At 0.05 218 218
Lobe Lift 0.3026 0.3026
Lobe Separation 110

 

I would guess 13.4-13.9@ 100 or so, there are SOOOooooo many variables.

I also highly disagree with the quote(below), everyone wants to automatically throw a 750 on any 350. The 650 will make it more drivable, better fuel milage, and better throttle responce!!(No offense 1FastZ)

[QUOTE]Originally posted by Skykiller

I ran a very simular combo. Mine was a 355, TRW forged flat tops, Stock rods and crank. Ported #462 heads 64cc, Victor Jr. EB intake, 650 double pumper....this sound framiliar so far?

The difference was that I ran a bigger cam. It was a comp cams mechanical roller, it was too big(255 dur @.050 and .575lift), becuase I had a NOS system on it and AFR heads in the mail....
I ran a 13.24@108 w/ 2.4 60's (without nitrous) in a 3000lb (inculding me) S-10, getting beat by 3rd gens running 12.9@102 GRRR

So I have a 3rd gen now :hail: :hail: Now just to build it up...

 

No offense taken SweetS10V8. I've tried a 650 on my 355 combo and its no comparison to the 750. I was 6 tenths faster with the 750 and it pulled so much harder with the 750.