Ive been thinking of the best setup to hit 14.9 ....

slp headers,hookercatback,3.42 gears,open element, shift kit
with all this - 15.3-15.5
custom chip- 15.1-15.3
edelbrock tbi intake-15.0

now would say crane gold rockers 1.6 ratio take off .2 tenths for my goal of 14.8-14.9 with everything running in good order traction,good tune up ect......

Basicly looking for the best setup without having to go crazy and buy heads or get an lt1 cam swapped prob lots of money

Hows all this look???

ps. my car just hit 80,000 miles so shes got a lot left in her

 

It may be possible, though I'm not sure how much the crane 1.6 roller rockers will help. IMO it would gain you the .2 seconds that you figured in-do to the fact that adding roller rockers are supposedly good for about 15 hp and the added lift should give you the other 5 hp (10hp=.1 sec improvement rule). Though an LT1 cam swap only seems to yield a .3 sec average gain, so expecting .2 sec from rockers alone may be a little high.

 

Agreed about the 1.6's. Your heads problably won't have much (if any) improved flow with the higher lift. I've got em' and there not that great, probably get .1s though. May I suggest searching peoples sigs, and find out what people are doing to their motors to get your best HP bang for your buck.

 

yea u guys prob right the best way to hit 14s would be getting some world small block 58 cc chamber heads and throwing the 1.6 rockers on them.

Part that $ucks about that is i see people in the tpi board with 305s hitting 14s easy with full exhaust and gears. We gotta rip into the engine to hit 14s with all the rs's crappy parts

 

Im not so sure you'd have to do heads/cam to hit 14s. I ran 15.8 with stock intake manifold, stock gears, and stock exhaust manifolds. I think 14s could have been acheived had I changed those three things. I've read people running faster than I did, too, with just a catback, open element and cat like I had. Its definatlly do-able if you added a stall converter to the mix, too. I wish that I would have shot for bolt-on 14s before I did heads/cam just to see if I could have done it.

 

you don't need heads or cam to hit 14's.
i think you are on teh right track to get the job done. make sure you do the free mods(ultimate tbi, diy afpr, timing,and aldl converotr lock up)
teh 1.6 rockers will help the power to carry a bit further up the rpm band before the power starts falling off. remeber, engien parts DO NOT make a difference in et's, they make a difference in power. et comes from teh application of that power. the moral of teh stroy is GET IT TO THE GROUND.
traction is gonn abe your key to success. if you can get a low 2.060ft you only need about 88mph to break into the 14's. if your 60ft is arond 2.1 you will need about 90mph.
you are gonna wanna shift the car yourself. make your 1-2 shift at 5000 and your 2-3 shift at 4700.
also, do the budget drag raing tricks at teh track. drop teh front sway bar, jack the front tire air up to about 50psi and don't put the rears any lower than 26psi(belt radials will "cup" at lower pressures)

good luck!

later
tim

 

yea ure definitly right about the importance about gettin the power to the ground. What would be the best differential i could get (i already have the 3.42 gears series 2 carrier) ? Also control arms, relocation brackets, and torque arm from spohn are all also on my mind if needed.

 

Hello

Don`t know how my car performs on the quarter mile , but recently I`ve modded it heavily here goes:



1928 Firebird Formula 305 TBI:

Crane cams camshaft
Crane Cams rocker arms
Corvette ZR-1 fuel pump
Hypertech custom chip
Powerstat 160F termostat
bigger injectors
bored TBI to flow about 455 cfm
adjustable fuel pressure regulator - Mallory unit

The car now has 330 hp on the dyno, but it soon wrecks my th700, which is currently stock. It might not run blasting in the 1/4 mile because of the transmission.

regards
Faceman

 

ooops

I`ve written 1928 Formula TBI it`s of course 1989 Formula TBI
)

 

You got 330hp on a dyno. What are the cam specs and what heads are you running, because those numbers seem pretty high? With 330 to the wheels you would be running mid 12s and I think you would be the first 305 TBI to break through 13s

 

I don't mean to call you out Faceman, but there is no way that you dynoed at 330 hp with only those mods. Unless you forgot to mention that it's not an L03. Cam and lifters are only going to give you AT MOST 50hp-which is being pretty giving. The other mods you listed probably aren't worth anymore than 30hp tops. 170hp stock + 50hp +30hp=250hp at the flywheel. If that is all you need to do to get 330 hp outta our engines, I'm pretty sure you'd see quite a bit more people running around in 330hp+ RS's. I'm don't even think a 455 cfm TBI would be able to support that many ponies.

 

It`s CRN 113932

RPM range: 2000-5000.

Duration @ .050" Int./Exh. : 210/216
Gross lift Int/Exh : .440"/.454"

I forgot , I installed Flowtech Afterburner headers.
I was able to lift them by my finger! Whereas the stock headers were heavy.
The car is now a little bit detuned to keep my transmission working ,as i`m going to rebuilt it soon.
All mods were done by my mechanic.

regards
Faceman

 

Well ,You forgot that I have much bigger injectors and fuel pump able to pump at 60 psi, the injectors are able to fill out a 500-liter aquarium within an hour, that means the engine is being fed with much more fuel/air . The manifold was also ported to mach the tbi, but I`m thinking about swapping it for a crossfire.

The heads are stock!

 

Here are my headers , now the paint on them has burned out.
You can also see an aluminium shield that protects the brake wires ( I don`t know how it`s called as I`m not an American
During the ride the headers are warming up so much that a shield was needed . The same shield is on the other side of the engine.

 

Here`s my free mod. Unlocked the hood bulge ,on Formulas & `82-84 T/A`s only This helps to get rid of hot air under the hood. Now the open air filter makes sense! The car is now cool , about 130F while cruising.

 

My last visible mod: The mallory fuel pressure regulator.

 

If you did dyno at 330hp I would take it to another place because I don't think stock heads and manifold could support that much power.

 

i highly doubt ure pushing 330 hp at the wheels with a 305 , what heads u got , and u said u bored the stock tbi to 455 cfm thats no where enough fuel to support over 350 hp at the crank

 

oh yea and any good suggestoins on a good differential
has to be a 2 series carrier i already got the 3.42 2 series carrier gears(3.08 and lower)

I think im gonna order this auburn diff from jegs its part number
109-542041..88-up,3.08-down ....$324.99 or
109-542047..88-up,3.08-down.....$400.99 this is the pro series one

im not sure what other good differentials there are for a 2 series carrier?
help needed thanks

 

I think it might be cheaper to buy a SLP posi and new gears.
SLP posi =$100
Thunder racing gears = $195
Sale of old gears = $50
You could probably even find some series three 3.42 gears on ebay or the classifieds pretty cheap.

 

The SLP posi w/ 3.73s worked great with my combo and auto when I still had it. It works even better with my T56!!

I have to suggest an ignition setup as well. Won't do much for power, but it will run better and into higher rpm. The MSD dual connector coil($40-$50) works great for me and really topped off my ignition setup(see sig)

Faceman,
no offense, but I still don't believe you're at 330hp even at the flywheel, or should I say flex plate. You still have the stock heads and intake, which are just too restrictive. You can pump as much fuel at whatever pressure you want to, but with stock heads and intake there is a limit, imo well under 330hp. Oh yeah, 455 cfm is 455 cfm= not a lot of cfm. I use a holley 670 cfm w/ 57 lb injectors. I am confident that even after a cam and intake swap, the injector size will still do just fine while running the fuel pressure between 10-14psi. I am also confident that I will still be no where near 330 hp, even with my mods (see sig). I'm not trying to flame, I just don't want to see a newbe read your mods and spend all of his or her money on these mods and then be outta luck when they aren't making 300hp.

 

Sort of a side topic, but it might be relevant.

Could it be that Faceman is measuring his cfm with a different pressure drop (remembering his locale: Europe)?

I know 4 barrels and 2 barrels used different pressure drops in their rating system. What system is the TBI rated under?