CAR:
1989 Firebird Formula, (original 305TPI) T-Tops, approx 3,500lbs

DRIVETRAIN:
Transmission = 700-R4, TCI Rebuild, Vavle body mods set to heavy duty
Converter = 3,000 Stall TCI
Driveshaft = Aluminum
Rear End = 10 bolt 7.625; 26-Splined Axles; C-Clip Eliminators; Power Tracks Differential; 3.73 Gear Ratio
Wheels/Tires = 16" GTA Wheels, with 265 drag radials

SUSPENSION:
Competition Engineering Subframe Connectors; Adjustable BMR Torque Arm; Tokiko Illumina 5 Way Adjustable Rear Shocks; Adjustable BMR Panhard Rod; Adjustable BMR "Xtreme Duty" Lower Control Arms; BMR Rear Sway Bar; BMR Front Sway Bar; BMR Front Steering Brace.

MOTOR:
Block = 355cid, All Cast, 10:1 Compression
Heads = zz4's worked a LOT; comp cams 1.6 roller rockers;
Cam = Hydraulic Flat tappet; Lunati Voodoo 227in 233ex duration .489in .504ex @ .050; 110 lobe seperation
Intake = Accel Super Ram
Fuel = SLP LS1 25lb injectors, Stock TPI fuel rails, Holley 255lph in tank fuel pump
Exhaust = Edelbrock Street legal shorty headers, 3" cat back with 3" cat
Computer = Stock computer, custom chip, stock Mass Air Flow sensor

 

high 13's @105 to 112mph and rember this is just an estimate

 

thanks a lot, man. anyone else?

 

that cam isn't the best choice for your combo- its really holding you back- though I bet it has a LOT of low end grunt which is better for stoplight races

 

oh really what would you reccomend?

 

I would think that's a nice cam for a 10:1 305 motor....

does the car run yet? take it to a strip and find out! I'm very curious.

edit; hey yea, that is a 350. I'm trying to fire up my 355 with that cam, hopefully success comes tonight.... let me know how yours runs with that combo.

 

You must have got an early 350 block in order to wind up with a flat tappet cam. I agree that is holding you back. So I will say mid 13's with your current combo. Other wise low 13's and if the stars and moon lined up high 12's.

 

I would say low 13's-high 12's...

3000RPM stall, aftermarket rear suspension, 265 drag radials, 3.73's, 227/234 .500" lift cam, trickflow heads, super ram... Yea, I think that's a pretty fast car. Sounds like a pretty well matched combo to me. Only thing that I can think of is stock MAF, I don't even know if that would do anything bad for you though.

 

put some lca relocation brackets on there, or else your powertrax differential WILL look like this due to wheelhop

 

haha oh boy, sounds good man, ill definetly look into that

Sonix, i dont really get your first post, how is that a good 305 cam lol...... what other cam would you suggest on a 350 EFI motor like mine?? its hard enough to tune this cam with the TPI EFI..

 

Hey Bigchief, where do you plan on racing out here on the island?? Make sure to tell me lol i have been wanting to get to a track for a while. If you want, PM me one day this summer when im not doing anything and i will lend you my Gtech pro. Tells 0-60, 0-100, 1/4 mile, 1/8 mile, HP, TQ, and all G forces, stopping times everything. Just let me know and we can go for a cruise one day. (remember to find a good spot to use it. )

 

prob e-town or somethin when my car is ready

 

that cam will seem bigger in a 305. People were suggesting the cam is holding you back, so I thought i'd mention that in a 305 it'd be bigger then it seems. However you've got a 350, so it should be just about right. Not too radical that it's impossible to tune, but still make really good power.

Anyway, let me know how it goes, I finally got my car to fire up last (same cam, small chamber heads.) and i'm having a hell of a time keeping it running. It's needing GOBS of timing at idle.... may have to modify my q-jet....

 

wow really, you mean your using the same cam and chamber sized heads as me?? what about the injection? is it carbed?

 

well, ok, not *that* similar of a combo.

416 heads, ported, ended up being 64ish ccs. Started life as 58ish though.
same cam
q-jet carb
4 speed manual trans
3.23 rear

 

you should definately run low 13's high 12's, i run 13.6's and run 9.5 compression, stock lower intake and slp runners with a much smaller cam. also i have only a 2200 converter. how lumpy does that cam sound?

 

wow 13.6's with that? pretty freakin nice man, what kind of tires? gears in the rear?

 

i have 3.27 gears and nitto drag radials 245-45-17

 

nice man, thats a sweet run. what are the exact specs of your cam/heads??????

 

i have edlebrock performer aluminum heads, and i have a comp hydraulic flat tappet cam 212, 218 duration, 450, 460 lift, but i have 1.6 rockers so it's probably about 480,490 lift

 

awesome, thanks a lot man

 

Well.. With 8.96:1 compression, a somewhat similar cam, crappy sportsman-II iron heads (flow about the same I guess as your tfs 175's), Stock TPI with an edelbrock base, and tuning I ran low 13's at like 102-103mph.. (back in 2000).

I think your setup is good for low 13s, maybe high 12s.. Only thing holding you back is the 700R4.

-- Joe

 

How does the car feel with the valve body springs set to "heavy duty"? I put in a TransGo kit last year and didn't go with the "full race" shims. In a few weeks I'm rebuilding the transmission with a TCI kit and was considering putting the extra shim in at that time.

Are the shifts very "harsh"? Is it "comfortable" on the street?

--
Casey

 

no not at all uncomfortable, it feels fine. only shifts hard when flooring it

by the way, thanks for the input joe! i figured the accel intake would give me a big advantage over the stock TPI, i was expecting around mid 12's....

 

any plans for getting a tune on that computer? I'd bet you could pick up 3 or 4 more tenths just in tuning...

good luck!

 

ya definetly, i have all the tuning hardware/software off of moates.net im all set

 

good to go, i'd say mid to low 12's running strong w/ a good tune.

 

now thats more like it

 

Just want to point out, his sig says he's running 14's and is a self proclaimed "Drag racing newbie"....

-- Joe

 

Yeah, well haha whatever. anybody else??

 

comon anybody?

 

My guess is also mid to low 12's with a good tune.

 

thanks a lot, i really appreciate all your help everyone, keep the guesses commin

 

QUESTION

what if INSTEAD of the ACCEL SUPER RAM, i used the TPIS base and runners??????

 

How about you scrap BOTH ideas, and get a Stealth Ram??
Seriously, DONT use a standard tpi-style set-up. At least go with the SuperRam.

Tuned-12.30's-.40's@ 107-109... on slicks.
on dr's... .70's-.90's.

 

Superrams look fugly, but a stealthram won't give the same performance.

Superram, or miniram if you can afford it. Stealthrams are icky pooh.

-- Joe

 

its just that the super ram costs a decent amount, i guess im just gonna have to save up. the TPIS base and runners come out to 900 before shipping, the super ram off summit is 750 for the plenum/runner piece, and the base is another 3 or 400 dollars, so they are gonna be AROUND the same price. i guess ill stick with the super ram

only are you guys POSITIVE that the amount of things i will have to change to install the super ram will be the same as the TPIS base and runners? which should be NOTHING lol. i just want to make sure i can keep the same stuff like the fuel rails an stuff

 

i just changed a few things in the original thread starter, just wanted to see if you guys thought anything different. instead of going with the trick flow heads, im sticking with the zz4 heads i have, and im going to have them worked. i found out they have a LOT of potential, so im going to try to take advantage of that.

 

Now you're gonna go REALLY slow..

I looked into this a few years ago. TPIS does a decent porting job on the 113 heads, for about $1800. Trickflows are $1100-1200. You can even get a set of AFR's for what the 113 heads will cost to get ported enough to compete with trickflows.


-- Joe

 

haha... thats what i figured i would hear... hmm well, the thing is the TPIS porting job comes out to 1200 after you sent them your core heads. yes, i know this is still expensive, but the flow numbers look amazing....

For the L-98 we only use the D port casting # 10088113, stock flow numbers is .100 increments: 60, 115, 161, 184, 196, 199. With our port work and a 2.00/1.56 valve: 62, 140, 203, 239, 259, 256.

that is straight off their website. i checked out some aftermarket heads, and they seemed to have lower flow numbers than those heads.

note: i am NOT going through TPIS to do this job, i understand that 1200 for a set of used worked heads is ridiculous, that is why i was going to go through a machinist i know, and spend tops around 600 working the heads.

bye the way, how much do you guys think i could get for these heads if i sold them complete with the comp cams 1.6 roller rockers?

 

anyone else have an opinion?

 

My final opinion. Build it. Run it and lets us know what it did. Guessing is just that. Only a guess.

 

sounds good