I was thinking of getting an engine for www.allchevyengines.com.Its a 325/350 and it comes with the eldlebrock preformer rpm i think. He said i would need to buy a carb. But I was wondering if i should stay with the tb and get a chip if i could or would it just be cheaper to go with the carb.

 

It comes with a edlebrock preformer it doesn't say rpm though i dont know if there is a difference

 

U could go carb or stay tbi. With carb, I would recommend a 650cfm of 700cfm Demon Carb, vacumm secondary and a return line fuel pressure regulator and a non-computer controlled MSD distributor w/ vaccum advance. If u went TBI, then talk to Pablo or someone about that or Z28 Boy. Hope this helps.

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Eric Natzke
91 Firebird 305 TBI (ZZ4 summer of "01")
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-Accel Cap & Rotor-MSD Blaster Coil-Rapidfire Plugs-265/50/R15 Tires-Emmison's all Gone
http://members.aol.com/j007golden/91firebird.html

 

this could get ugly. These guys love their TBIs! Im sure u know the benfits of each system....If you want the best of both world then go to a holley 670 cfm repalcement and get a chip or something.

YES, there is a difference between Performer and Performer RPM. The RPM is designed to be used at higher RPM and is a bit taller

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91 RS W/carbed 350, Vortec heads, performer rpm, Comp cams Xtreme energy 280 grind. BFG Drag radials. 3.42 posi,Corvette servoed 700r4, ****ty stock converter
13.24@104

 

I agree vortech, this could get really ugly. I for one am for carb instead of TBI. Thats just my opioion and I am sure TBI could work good too but I like carb better. But I always say this when people are deciding on wheather to go with TBI or carb. "What did the company use to dyno the engine and in today's performance engines, where is TBI now?" I am not attacking TBI so don't starting arguing with me. TBI can be made to work I guess from what I hear, but carb is cheaper than TBI and I belive performs better. Its up to u though, I would call and ask the people that made the engine what they think. Tell them your situation, emmision problems, you have tbi currently, the year of the car your putting it in, yada yada, and see what they have to say. They might have a solution for ya. Hope this helps.

 

Hmmmmm...this gave me alot to think about. Price wise, I believe the TBI would be better. I'd get the Holley 670, the carb to TBI adapter, and a chip. That would be less then a carb, a distributor, and a regulator, wouldn't it?
You'll probably get better fuel milage from the TBI, and the TBI is easier to tune then a carb with all it's jets and meetering valves and such. But performance wise, I'm not quite sure. A Holley 670 TBI is only a 2 barrel, but it flow the same as a 670 4bbl, I'm not sure what can make a carb perform better then fuel injection, isn't fuel injection supposed to be more precise then a carb? If carbs are so good, then why were they replced by TBI and multiport systems? Is there a car even available today with a carb?

Hope someone can broden on what I've stated.

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1992 RS
327, Modded TBI, Rebuilt WC T-5 5-speed, PRO 4 15" rims, Nitto's, 3.73's, SLP 1 5/8" headers, and a few other things.

 

Well yes in some aspects TBIs are better than Carb for things like emissions and fuel economy, but not power ate high RPMs. Im do not own one but I am talking from just what I know in general. You need a computer and other things to deal with the TBIs and that is not good for big cams and heads and the TBI does not flow well above 4200RPM(or something around that range) So if you want to save a little money and not get out of controll on cam and heads stick with the TBI because it will be cheaper than changing everything and will give you better fuel economy and might get you to be able to pass emissions test. Now the carb will allow you to make more power if you can tune it right at ever drag strip and will allow you to run virtually any combination of heads/cam and other things. My advice for what you want to do is install a Holly TBI unit.
The new Cars dont have carbs because of fuel economy and emissions. Remember the big time performers still run carbs (There are resons for that) hope this all helped

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86 Trans Am 355 TPI Rebuilt 700R4 with Corvette servo, modified valve body, and a B&M Torque Converter (2000 rpm stall w/ lock up), 87 350 block bored .30 with new crank, bearings, rings, and magnafluxed rods. Reworked 305 heads with 3-angle valve job. Added in the rebuild was an SLP TPI cam, BBK 58mm Throttle Body,SVO 24# injectors,MSD 6A, Hypertech Power Coil, 1.5 Crane roller tipped rocker arms, SLP Intake Runners and Port matching in upper intake including fully ported plenum, TPIS adjustable fuel pressure regulator @ 46psi, Hooker shorty style headers w/ Thermotech heat wrapping, Custom 3” exhaust with Flowmaster muffler and chrome quad tips, Hypertech Thermomaster Computer chip, K&N open element cone filter on modified MAF per TPIS specs, MSD Wires, removal of A/C hardware and a 1LE firewall cover installed. Also there has been a PST front suspension kit with Hotchkis strut tower brace
http://geocities.com/SunsetStrip/Garage/9548/kyle.html

Kills:
95 Talon TSI, 96 Probe GT, 91 T/A L98, 89 RS, 86 Mustang GT, 88 Mustang LX 5.0, 92 Thunderbird V8. couple or ricers that I think were Civics or Preludes not sure what year, 95 Celica GT-S, 94 Chevy 1/4 ton 350, one of those NASCAR F150's

 

they use carb to rate engines because they don't need to tune a computer for every one of the hundereds of engines they do. geeze...
I could go on but I'm sure pablo will go nuts now

 

LoL Tas, yeah he probably is.

Yeah, good point Duke on the price thing. I guess I didn't think about using the stock distriubtor.

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Eric Natzke
91 Firebird 305 TBI (ZZ4 summer of "01")
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-Accel Cap & Rotor-MSD Blaster Coil-Rapidfire Plugs-265/50/R15 Tires-Emmison's all Gone
http://members.aol.com/j007golden/91firebird.html