Hey all I have 1986 firebird 305 stock bore 350 vortec heads 1.94 intake 1.50 exhaust edelbrock high rise intake . Don't know compression had heads cut and tanked 1.6 roller rockers comp lifters and thumper cam 520 540 lift duration. 650 holly double pumper msd 6al 6700 rev limit msd dist msd wires auto light plugs. 700r4 built shift kit also 3000stall converter 10 bolt rear 4.56 gears 275/60/15 mt et streets very sticky . Full 3 inch exhaust shorty headers and y pipe B&m shifter all ac removed honey comb and metal support removed replaced with aluminum all wires gutted computer no smog etc just what I need I be legal on road 4gen seats stock carpet etc full Lakewood suspension disc brakes all around summit spring set lowers 1/1/2 . If u need any more info let me know Ty in advanced

 

None of Comp's Thumpr cams for SBCs have lift specs of .520/540" Is this a fantasy build, or is this a running combo? You can get desktop dragstrip programs to predict results.

 

This is my set up not made up 520 540 gross lift they sell them google it

 

"...edelbrock high rise intake..." What is that, exactly?

Cam duration means more than lift. What are the duration #'s?

I assume you'll run mid-14's, assuming you don't run out of RPMs before the finish line.

 

One sure way to find out is to take it to the track.

 

So far in this thread...I agree.

 

Well he wont run out of rpms, i got money on mid 13

 

Well....if he runs a mid 13 and traps say...101, he'll be spinning ~5900 RPM when he crosses the line.

We really know squat about this combo;
305 stock bore
350 vortec heads had heads cut Don't know compression
edelbrock high rise intake What does this mean?
1.6 roller rockers
comp lifters
thumper cam 520 540 lift duration. Duration what?? What duration?
650 holly double pumper Little big for a 305, IMO
msd 6al 6700 rev limit msd dist msd wires auto light plugs.
Full 3 inch exhaust shorty headers and y pipe
all ac removed honey comb and metal support removed replaced with aluminum WTF??
all wires gutted computer no smog etc
700r4 built shift kit also 3000stall converter B&m shifter
10 bolt rear 4.56 gears
275/60/15 mt et streets very sticky
4gen seats stock carpet etc full Lakewood suspension disc brakes all around summit spring set lowers 1/1/2 .


I'm guessing that we're talking about a 220hp, low compression 305 here. I don't see mid 13's crossing the line at 5900 RPM in this guys near future.

To the OP NEED MORE INFO. OR...take it to the track and tell us how it did.

 

Eh i never been good at guessing time anyways :/ well he does plan to run to 6700rpm (poor engine). Oh the honeycomb i think is the plastic behind the front bumper.