3.492rs

1/4mile guess

I have a 89 iroc rebuilt 350tpi, 2.77 pois rear, auto. my motors is still apart.

Heres my mods, all the free mods, brodix heads (don't know which ones yet but they were used to feed my mechanics forged 406),zz4 cam(i know its small for the heads), hfpr at 48psi and 24#ford svo injectors, probuilt transgo shiftkit with vette servo and .500 main boost valve, 296 intermediate/reverse boost valve, tci 2200 stall convertor. the intake is a untouched STOCK tpi, tes headers, 3 inch cat, and slp loudmouths. it has a hypercrap chip and is not tuned for anything.

Any suggestions appreciated.

3.492rs

heres a pic of the heads if they help

TBI92Camaro

Any idea on the urnner size? Brodix heads supposedly flow damn good, though not sure.

Assuming 200cc Brodix heads with 2.02 valves wlel, you'll be disappointed with a small cam and the stock TPI. You dont even begin to wonder how much that stock intake is going to kill you. Sorry to say but TPI sucks. You'll need to either do one of three things here.

1 - Port the hell out of that stock intake and get some SLP runners and port that lower intake as well.

2- Get a StealthRam/MiniRam or other aftermarket EFI system. Itll cost some but if you have the motor on the stand, do it right the first time....work smarter, not harder

3. Dump the EFI crap and get a good old carb setup...so much easier to mess with and tune you'll wish you never messed with that EFI crap.


Id dump the TPi, either sell it or store it. Get you a Holley Double Pumper or Street Avenger carb with Vacuum secondaries. Do some tuning on it and you wont have to worry about it dropping off at 4500RPM or that crap, itll run to the moon.....Here's the question, how many guys who run fast ET's (10's in the 1/4) use stock TPI??? How many use a carb??? end of debate, get a Carb!

Mcdamit

he is right to some degree, tpi has alot of potential, but not so much in stock form. Normally i would say stick with tpi, but the parts are so damn expensive, aftermarket parts non slp/bbk, usually cost 500 for the baseplate, 500 for the runners, 500 for the tb, and about 250 for the plenum which must be ported so 500 for that as well. It may be in your best interest to go with a holley Stealthram, they are $500 complete and I believe you can use your tpi tb and your stock computer. The zz4 is very small but i will get you gas mileage, its actually smaller than the cam i am putting in my 305....

high to mid 13's if your lucky. Upgrading the heads will certainly help you and out of the box i believe 882's flow better than L98's so you will be about as fast as a LT1, the tpi is going to hold you back. You may want to port it out, maybe just remove the blockages in the plenum, get a new base plate and port match everything to each other, especially the baseplate to the manifolds. If you do upgrade go to tpis they have everything for an upgrade and have them match the baseplate to your heads.


Though looking in that pic i see a performer rpm intake hmmm..

TBI92Camaro

I see a regular Performer intake there.

882's blow *** L98's blow them out of the water with flow and flow potential. 76cc chambers dont exactly help a normal small block at all with any kind of compression.

Im gonna estimate low 13's/high 12's if you ditch the TPI though Im not sure on the ZZ4 cam specs like duration and lift.....And seriously, if you plan on staying EFI, plan on learning how to tune and burn chips...

EDIT: I forsee mid 13's with those poopy gears....get some 3.73's and see 12's!

Street Lethal

iTrader: (16)

Toss the stock TPI intake. If EPA isn't a concern, go with an LT1 intake swap. Toss the ZZ4 cam, and step up to a CC306 (or better)... and lose those rear gears. With those heads, you're running 12's, easy.

The MAF will help compensate for the lack of chip tuning, but only to an extent though...

3.492rs

epa is a concern, how bout a hsr intake and an lt4 hotcam on that setup

Street Lethal

iTrader: (16)

If EPA is a concern, forget about the Holley Stealth Ram (no EGR). Why not consider an Edelbrock TPI base, stock plenum (ported out)... and bigger runners.

As for the "Hot Cam", forget about it. That might be a good pick for an LB9 build up, but you're shooting for max power, aren't you?

You'll need something with a little more duration and lift to get the full benefit from those heads.

3.492rs

i can't go really over a lt4 hotcam cause i still got to pass smog. this car will be tuned though so i problay can get a away with an hsr as long as it passes the sniffer test

Street Lethal

iTrader: (16)

You can go way over the LT4 cam, and still pass smog with flying colors, hehe... trust me.

Compared to what's out there today, the "Hot Cam" is more comparable to a broom stick.

You'll easily pass the sniffer, but you won't pass the visual though. If you're positive that they won't do a visual, then go with the HSR (but please, pick a better cam for cyring out loud)....

OUTATIME GTA

iTrader: (2)

13.6-13.9 if you can drive/launch.

urbanhunter44

iTrader: (3)

No visual inspection

I don't know what emissions laws are in New Jersey, but in CA they're the worst in the nation. This means that basically anything bigger than a cc305 won't pass the sniffer test. Once in awhile you see someone sneak through but it's rare.

The cc306 would be a great choice for an hsr setup, but an hsr is most likely out of the question because it compromises an EGR valve.

The absolute best choice for him would truly be a custom grind and a custom tune with all the bolt-ons, barely passing smog. But that costs money.

3.492rs

cc306 it is then?? oh i might score a 10 bolt 3.45 posi disk break rear tommorow that should solve my gear probs, my 9bolt 2.77's posi is so worn only sometimes it will work

bitchin85camaro

3.45's are good. I just took out some 3.42's and put in 4.10's 2.77 to 3.45 is a nice jump. you'l have alot more fun. get some nice street tires too