92 Rs ???

i just recently got back into street cars , i bought a 92 RS, after driving the car for a few weeks the 305 has about as much power as a good 4 cylinder:eek: .

My question is can i just drop in a 383 or a 350 say with a set of dart heads and a mild cam and make it run on the TBI without much troulble. I drive this car every day and i really like fuel injection. i hate carberators they are old school and i dont want to go backwards. however i do know that a carb will run great and is easy.

if the TBI wont work with the above what would be a good combo to go with to keep and get some decent power out of the car ???? thanks



Chad

well,u could do that and if u put the TBI back on your shooting yourself in the foot.

if u have a big budget and wanna stay w/ FI,i think Holley makes a good TBI system that u could look into that would give u great power. the GM TBI system is great as far as being reliable,but the performance is just not there.

A 350/383 will drop right in, that's what I'm doing. TBI will be reliable but like Rice Killer said, performance will be mediocre. If I were you, I'd look for a TPI setup. If you want to stay with TBI, look at the Holley 670. Look over the TBI board at www.thirdgen.org they have a lot of good info. Good luck!

-Corey

You can go with a 350 and those heads and a mild cam like the ZZ4, and have about 250 horsepower with a GM TBI setup. Dont forget you'll need larger injectors too, and possibly a custom chip. Dont expect the TBI make much more power than that.

TBI is the worst intake design ever, I don't know what they were thinking when they were trying to mate a fuel injection with a carburator. Defiantley get rid of the TBI if your getting a newer and bigger engine.

The LT1 swap is pretty easy if you wanna go that route, wiring is just about the only hard part. If not im sure you can find an L98 with a TPI setup pretty cheap these days, best of luck to ya.

dont forget you may have to change the fuel pump,

the decision i would make would be based on my budget, how much work i could do myself, and how long of the fooleshness i could stand before the car is drivable

Actually, if he had a v8 fuel pump it needs no replacement unless he was swapping in an LS1, but you could always do it if you feel your fuel pump is about to go out.

Wrong. The TBI fuel pump is only capable of putting out around 16-18psi and most any other injection setup (TPI, LT1, LS1, aftermarket) will require fuel pressure to be anywhere from 40-60psi. There is no "V6" or "V8" pump....the difference comes with the injection system. Hell the 2.8v6 fuel pump would be better for an injection swap than a TBI pump (the 2.8MPI pump makes about 48psi.)


There's nothing wrong with running a TBI system....you just have to build it right. Bigger injectors and an injector spacer (for more airflow) will help a lot, but if you want to run real power (i.e. 300+ hp) you'll need to go to a bigger throttlebody (or dual throttlebodies if you're ambitious) which is gonna require custom chip tuning at the very least.


I'd say go carbed. That's the route I took when I yanked my 305 and I've been very pleased with it. The carb is a little tempersome when it's below freezing, but it was by far the easiest way to go and the carb has been more reliable for me than any TPI car I've worked with.


My $.02

to give you all little background on myself i am a ASE master auto tech so all the work will be done myself !!! but on the other hand the reason i'am asking you all for advice is that i'am not much in the performance end of stuff.

So from what i gathered from you all if i want to make over 300hp i'am fixin to spend some jack to get the tbi to work?
Or i can get a motor out of a later model car that has sequential fuel injection?

So what is the best motor any of you all have under a stock tbi with only bigger injectors and a plate ??

I dont want this car to have 500 hp i just want a daily driver that doesnt get passed a dang rustang or a *** car.... etc.



Chad

Originally posted by coony278
So from what i gathered from you all if i want to make over 300hp i'am fixin to spend some jack to get the tpi to work?
Or i can get a motor out of a later model car that has sequential fuel injection?

To get TPI to work it won't cost much. To get a 300+hp TBI system, you'll need to spend a good bit of money.

An LT1 will swap in fairly easily. 275hp stock.

LS1 will swap in easily as well, just not as easily. Look at www.ThirdGenResource.com they have an entire swap kit. Bone stock they put down 320+. You will however need a new tranny, whether it be an A4 or M6 to bolt to an LS1 block. This is a whole 'nother thread though.

-Corey

mmmmmmmmmmmmm Carb :D

carberator's suck for daily drivers!!!!!!


Chad

Why not choose the 350 TPI set-up??Then maybe a holley stealth ram setup, heads, cam. This is also probably one of the best set-ups if you're working on a budjet.


Im with you on the carbs though, not a good choice for daily driver.

Whatever you decided to do, we wants pics!


Tim89Rs

Well, for a good daily driver and decent power and saving some money. I would just get a 350 longblock and a Holley TBI intake + Holley 670cfm throttle body + 1"under TBI spacer + decent cam + a custom Prom.
Plus all of the usual : Cold Air Inlet, K&N filter Element, headers, good exhaust, shift improver kit, decent gears.

I've got a 350 TBI in my 5,600 LB. Suburban, I'll tell ya, that thing suprises a lot of people!...It dies off around 75mph but it's stock except a 3" exhaust and a K&N element with the lid flipped over. I can sqwall both tires on a hard take off, and if the roads are just a little damp it'll Roast'em....I know it's not a rocket..but it's basically stock & weighs over 5,600 LB!!!
That motor in my Z would "Flat-out-GET-IT!...

But it depends on how far you want to go?, how much you want to spend? and the long term goals for the car...
Daily driver/decent power= TBI can do it. Weekend Warrior= TPI or LT1...

Originally posted by Kevin91Z
You can go with a 350 and those heads and a mild cam like the ZZ4, and have about 250 horsepower with a GM TBI setup. Dont forget you'll need larger injectors too, and possibly a custom chip. Dont expect the TBI make much more power than that.


I hope you are not talking about swapping over the stock 5.0L TBI heads to the new motor. Those have to be amoung the worst if not THE WORST set of heads ever placed on a SBC. Invest in a set od darts, or anything else for that matter

Will

This is what i want , i want a late model 350 block that is roller ready, a comp cam ( small), and a set of dart heads . i want it too run off the throttle body. if i can get 300hp that would be great. that is plenty of power for a daily driver. so now all i need to figure out is what injectors i need and intake.

where is the holley components available from ? any info you guys can throw my way on this set-up would be great all the info so far has helped tremendously , thanks guys !!! :bow:


Chad

Try Jegs or Summit

Check here thru the online catalogs..

www.summitracing.com
or
www.jegs.com

Originally posted by stanghunter211
I hope you are not talking about swapping over the stock 5.0L TBI heads to the new motor. Those have to be amoung the worst if not THE WORST set of heads ever placed on a SBC. Invest in a set od darts, or anything else for that matter

Will

No, he said in his first post he was going to get a set of Dart heads or something... :)

The CC XE258 should get you 300hp with decent heads. I've seen comparisons to the next up XE264 and it gave up a very little on top that you won't need anyways. But the throttle signal was crisp and maintained good low speed performance. If you like Dart I'd go with the S/R(stock replacement)Torquer for 350 with 64cc chambers.(Not confused with the 305 versions w/58cc chambers..)The Holley 670 Throttle body has larger injectors and throttle blades and idles better/flows better than stock.
So;
XE258(Your gonna need to maintain at least 17HG@idle as you know w/o reprogramming.)
S/R Torquer 350's
Crane 1.5 Full Roller Rockers
1" T/B spacer, and the injector(S) spacer
K&N filter element, either open element, flip the lid, or get a Dual Snorkel and fab cold air to it.
Holley 670cfm T/B
Holley intake, or port your own
Accel ignition coil and Module(More dwell & Hotter Spark)
Flowtech shortie headers
Have I forgotten anything??

ok , i have another question where do you guys get all these numbers at such as CC XE258, XE264, then some numbers like l98 and such , i have been an auto tech for 15 years and have never heard these numbers ? i have heard Lt1 lots of times but these other numbers are greek to me. where are you all gettting them ?

Chad

CC XExxx is a Comp Cam Extreme (xtreme) Energy grind cam. L98 is a 350 tpi. You and I have an LO3, which is a 305 tbi.

If you stick with TBI, you'll need a 350, decent heads (dart, as you said, or I run the GM Vortec heads), a nice manifold (Performer RPM and carb to TBI adaptor, Holley Pro-Jection which is a tbi manifold so you wont need the adaptor), a mild cam, full exhaust and a Holley 670 tbi or a 454 ss tbi, both of which have 2" bores. I finally got ahold of a 454 off ebay, but its not on my car yet. Then I cant stress how important a custom chip will be. The car will run like crap without it. I want 275-285 horse out of my 305 tbi when its all said and done, but I think it'll be basically taxed at that point unless I want to put a big cam in it, which I dont want to do.

As for the fuel pump, once you do heads or cam on it then you'll need it. The stock one is garbage. I have the Walbro 255 lph and its nice because if I ever switch to an 8 injector setup, I wont have to swap pumps again.

Then the usual gears... etc.

Terms like: L98, LT1, G92, B2L....Are all RPO codes (production option packages)on a list found in you center console...You can plug the numbers in at 3rdgen.org and it'll tell you all of your car's option specs.
Like chuck said terms like: XE, XR,, are usually aftermarket catalog abreviations.
Actually since you want a roller cam it would be XR(Extreme Energy Roller)in most catalogs...
XE258 = Comp Cams Extreme Energy 258*Duration cam(advertised duration) .480"itake/.487"Ehaust lift....still a ton larger than stock...

i got my block back from the machine shop . i'am using a late model roller block , it bored .040. i havnt ordered my heads yet or cam.

I have decieded to stick with the TBI. I dont see why if i put a 670 cfm throttle body on it why it wouldnt have enough flow. 670 cfm is 670 cfm right ????

I was wondering can i use a holley air gap intake and put the TBI on top of it with a nitros plate under that for the spacer?

If i could get 275 hp off of motor and then spray a little nitrous lets say 250 shot that's about 500hp :eek: . that is an awsome street car . heck i think i would be hard pressed to ever hook up that kinda power ;) .

Of course you wouldnt want to spay that much all the time but on weekends it wouldnt hurt the motor to spray that if it has the right stuff in it ???


What you guys think ?????


Chad