I've recently landed an awesome job that pays great, ready to do something... And I think i've decided to mod my 92 RS... 305 TBI auto...

I'm starting by ordering up an SLP takeoff posi unit, and some 3.42 GM gears... Going to have them installed...

After that's finished, it's on to the tranny... Getting a shift kit and vette servo installed along with a flush and refill of the tranny... Should keep me going for a while..

Then, I'm going to buy a set of headers, a catco cat, and a flowmaster cat back and have all of it installed at once..

Then, I'm going to buy a used 350, have it rebuild, add vortech heads, and a nice cam with 1.6 rockers. Performer RPM intake and a I think a 650 carb should do it.

Then finally, I'm going to get a 100 shot of NOS... I figure with a good set of tires on the back, I should be able to get low 13s on motor and mid 12s on the bottle..

How does this sound?????? Suggestions and comments more than welcome! Thanks guys

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1992 Red RS with 305 TBI

 

Upgrade to some sort of 16x8 rims. Go with 255's on the rear and 245's on the front.

Get some sort of Cowl Induction hood for clearance.

Chances are that ur old 700r4 won't last to long with that 350 in it, espically with the hp/tq it is going to be putting out. If u wanted to stick with the 700r4 style then I would recommend http://www.pro-built.net They make different stage transmissions to withstand large amounts of hp/tq. I have heard nothing but great things about them and their transmissions come with transgo shift kits. For around $800-$1250 I belive, and then u can throw in whatever stall converter u wish to go in it for another 300 probably.

All else sounds good. I recommend a Holley or Demon Vaccum Secondary Carb if ur going to go carb on it. Maybe even a 750cfm instead of a 650cfm.

If you do swap to carb u will also need to get a TC lockup kit for the torque converter. Its about 65.00 from Jegs or Summit.

I Reccomend a 14x3 open element on the carb and maybe even march pulleyes to get ever bit out of the engine.

A 1LE Aliunum (sp?) Driveshaft, our stock shafts don't take to well to high speeds and I don't think u would want to take the chance of that going when ur at high speeds.

Lower Control Arms for traction and some other suspension mods like KYB shocks/Struts,Herb Adams sway bars, Subframe connectors & strut tower brace (Edelbrock makes them for TBI/Carb)

Get some Nitto's or some nice Slicks for the track.

With the NOS you should be deep into 12's for sure, maybe even high 11's if everything is tuned right (cross fingers after ur wallet is empty )

Make sure u go with a dual plane manifold like the Performer RPM. (just my opioion,a lot of people have mixed feelings about the single plane's)

Make sure the exaust system u get is a 3" system for that 350 and make sure ur headers are 1-3/4" primaries and not the 1-5/8". I reccomend u get the coated as well. Worth every penny.

But the rest sounds good man. ENJOY THE RIDE AND BRING US BACK SOME TIMES! Keep us updated tooo. oh yeah, after this post you will probably get some beef about u swapping from TBI to Carb. Do what u want man. Talk to mechanics at speed shops in ur local town and see what injection system they reccomend for ur setup. They would know for sure.

Good luck!

[EDIT]
I just remembered that I forgot the igition. That is kinda entirely up to u. I went all MSD. MSD 8.5mm Superconducter wires, AC Rapidfire plugs, MSD Pro-Billet Distibutor and an MSD 6AL (comes with a revlimiter) With all this said I hope ur job pays real well. And if u really want to get crazy, bore the engine over .060 when u have it rebuilt.

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Eric Natzke
91 Firebird 305 TBI

ASCD Ram Air Hood-3" custom exaust-Flowmaster 80 Series-No Cat-Edelbrock TES Headers (coated)-March Pulleys-TBI Spacer-K&N Open ELement-TransGo Shift Kit-B&M Supercooler 28,000 GVW-Hypertech Thermomaster-160 Stat-3:42 GM Gears-Auburn Posi Unit-Edlebrock Strut Tower Brace-MSD Superconducters-MSD Cap & Rotor-MSD Blaster Coil-Rapidfire Plugs-265/50/R15 Tires-Emmison's all Gone-Free TBI mods
http://members.aol.com/j007golden/91firebird.html
For info on certain parts or mods go to the site below
http://members.aol.com/j007golden/modeval.html

[This message has been edited by 91Bird305 (edited December 22, 2000).]

 

get a hood from a 82-84Z(fiberglass)
and do some cold air induction,KINDA like the formula mod.
been wantin a 3rd gen camaro just so I could do that...look stock and not have that gigantor schnoz of cowl on your car,kinda reminds one of tropical birds with that cowl lookin thing on his beak,just my take,if i was just draggin Id put on a cowl but not for streeter

how bout a destroked 400
converted to one of those eldebrock FI kits
with a TURBO
should alow the turbo to spool up faster
I believe
I also say keep the F I
and show those people that TBI can make power
it must be good if my buddys 85 carbed Z
with a carb that flows a 3rd more air,better flowing heads ,slighter larger exhaust makes 20 less HP and tourque than my car
STOCK VS. STOCK

Carbed probaly easier ,I guess

or maybe a 355
converted edelbrock FI
with a PROCHARGER turbo
dont forget the suspension

 

I have thought alot about what injection system to use, and a carb seems to be the most practical..

Sure I could get some power out of a modified tbi setup, but what's the point?? My motor still wouldn't be up to it's full potential.. And a carb is cheap horsepower.

Besides, I want to get rid of my ECM. I hate the idea of needing a reprogram after doing mods to the motor. It all seems like a waste of money.. I realize that EFI gets better mileage but I really don't mind.

I'm planning on ordering my posi unit next month, once I order it then I'm definitely going to stick with the RS and mod the hell out of it..

If not, it's LT1 Z28 time....

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1992 Red RS with 305 TBI

 

I like this Brian guy! So have u found a 350 yet at all? Have calculated all the money this is going to cost and what not yet before u get to deep into it? Just wondering. Cause it can get expensive when u start getting into it, cause its way to much fun.

 

That sounds like a well thought out combo, but keep in mind to buy a cam that is compatible with the gear and the amount of stall speed your tranny has. If anything, go a little smaller on the cam, rather than bigger. I would suggest a custom grind from Comp, Lunati or whomever you prefer. They don't cost much more, and they are ground to "fit" the rest of your set-up. You need to know your compression ratio, gear, stall, weight and carb size.(you may also need to get the flow #'s for the heads, some ask for this, some don't) A 650 is plenty for a Vortec headed engine, you'll run outta head flow before you do cfm. My car is running 12.50's w/ a 650 Demon on motor, and I had to jet it a little leaner, so it'll do for the level of performance you're striving for. A good stall convertor would be a big plus, just buy one considering how much you're gonna drive the car, I would go no more than 2400-2500 for a daily driver.This combo should easily yeild mid to low 13.'s on motor for you. I went 13.19 @ 102.6 with the combo in my sig, with a 2400 convertor and a 3.42 gear -- I have upgraded to a 4000 convertor and 4.10's since then, primary due to the fact that I am changing to a much hotter set-up this winter, but that the best I got with the old combo.

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82 Z28 350, Ported #882 Heads, Performer RPM cam and intake, hedman headers,650 Demon carb,
Trans: Turbo 350 w/ 4000 stall -- Rearend 7.5 w/ Richmond 4.10's, Auburn Minispool
Future plans: Dart headed, Roller cammed 383 in early '01


89 RS, L03 305, Hypertech Chip,cat delete, Dynomax exhaust,K&N open element Filter,160 stat, MSD coil --Trans:700R4 Corvette Servo -- Rearend: 7.5 GM 3.42 w/ posi-lock http://www.bassettracing.cz28.com

[This message has been edited by Basett Racing (edited December 22, 2000).]

 

Actually, no I don't have a motor yet.. I've been looking in my local paper ads lately and have noticed a few engines are always in there for sale.. Mostly 350s..

I'm sure I could check some of these out, and find something good to work with... Yes, I was actually planning on having it bored .30 over and throw in a cam, with 1.6 roller rockers.

I need to start doing something to this thing quick.. I'm tired of being slow!

(I'm sure a few people here can relate to that)

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1992 Red RS with 305 TBI