Reyes'91

My friend just got a new ride, and he keeps talking his s**t. How do you think my car would perform against his 'vette?

InfernalVortex

iTrader: (4)

If it has a stock engine it's a dog. I know nothing about what you have, unless you've swapped it, it's a stock 305, and they're dogs too.

Might be a close race.

big hammer

both stock, the camera man at the finish line will be able to have a nap.

danziger

The 1984 Cross-Fire Vettes were rated at 205HP, so MAYBE 180rwhp stock if it is in extremely good condition.

Don't know anything about your 350 RS...

fly89gta

iTrader: (1)

Hmmm, a "350 RS"....since that's not a stock engine option don't you think it'd help if you listed some damn specs of your engine? It could be a smogged out 70's "350" which is more of a dog than the Corvette engine...or it could be a 400hp monster.

Common sense isn't so common anymore is it?

But like bigger hammer said...:yawn:...slow race.

Reyes'91

You all are way out of my league. I'm honestly new to this and don't know much. But yeah my car's engine was swapped out, by the previous owner, however. So I'm not to sure about the specs on the engine currently in there. But the corvette is stock.

fly89gta

iTrader: (1)

Gotcha. The Corvette is going to slow, hard to say how fast your car is.

Reyes'91

You think you could help me figure out? I need some schooling.

fly89gta

iTrader: (1)

Is it a carburetor or fuel injected?

Reyes'91

Fuel injected.

fly89gta

iTrader: (1)

Throttle body or tuned port?

Reyes'91

Throttle body. Which is better?

fly89gta

iTrader: (1)

Tuned port IMO.

So unless someone did heads/cam on it the engine sounds like a LO5...which...well it's gonna be a close race if that's in fact what the engine is.

justcallmeclassy

iTrader: (1)

Tuned port is more focused on low end torque. Throttle bottle has a little less low end torque, and a little more hp. TPI engineswith run outthe of breath around 4000I or sothe rpms, TBIs do a little earlier but thatsthe the crappy heads, cam, and exhaust not the FI. Not enough of a difference for you to notice probably.
People rag on tbi because it was offered in the low end cars. Trust me its more than fine, and its also the simplest efi system in the world.
but tbi cars came with the worst possible air feeding system ever. Do search for ultimate tbi right now, and don't look back, it'll help out big time. Also the tbi cars hd the most restricive manifolds I can think of, so if you're not running headers, do it. And an open element air filter. You will feel the diference.
now if you've swapped motors but not done anything with the computer its gonna run like crap.
What are your rear gears, and if you're an auto tranny guy what's you stall?

justcallmeclassy

iTrader: (1)

Also I have an 85 vette 350 in my car. The only difference between the 84 and 85 is the change for crossfire injection to tuned port. It performs much much better after a k&n, rear gears, long tube headers, and the ultimate tbi mods. MUCH better. Not enough that I wanna keep that motor forever, but good enough to keep me happy while I build a monster.
if you have you stock stall and stock rear in that RS id put money on the vette honestly, at least until you could give some more specs on your motor.

justcallmeclassy

iTrader: (1)

https://www.thirdgen.org/ultimatetbi
https://www.thirdgen.org/ultimatetbi2

Since you said you weren't sure what was going on with your car and you have tbi, you should read these

Reyes'91

Thanks for the help. I'll look into your suggestions, and'll try to get the full specs of my engine. I really wanna know whats going on in it now.

InfernalVortex

iTrader: (4)

The problem with TBI is the heads and camshafts taht come with them, not the injection that gets put on top.

TBI makes better off-idle torque. TPI multiplies torque through the runners' resonant range which something like 3000-4000 RPMs. TBI is gonna be more akin to carburetors, the difference is that the TBI injectors do a lot better job of atomizing fuel at low RPMs. Im talking 700-1200ish RPMs. Carbs will have a hard time making that kind of torque that low because of the poor booster signal. Beyond that the trouble with TBI is finding injectors that flow enough to feed a serious engine.

When it comes to performance applications, I think the TBI has a lot more potential and is a lot cheaper to realize it, it's just a matter of actually FINDING the parts to do it, and learning to tune it because there's not really anyone who can do it for you very well. You'll probably have to go the EBL route.

But your problem is not the TBI - it's the garbage swirlport heads and peanut cam. You guys should be making right around the same horsepower assuming your engine is running well and is actually a 350. If it was swapped in then I would question how it runs so well considering serious adjustments need to be made to either the stock 305 tune or the truck 350 tune to make it run right in a lightweight (in comparison) vehicle like an F-body. If it runs perfectly stock and doesnt have any weird quirks, I'd be more inclined to think you actually have a 305.

But if it's a 350, you still have a 350, heads and cam will get you to wherever you want to go. But heads and cam are serious work and serious money.

So again... if you've got a 350 - might be a close race.

If you've got a 305, it will be less close. Still a napfest though.

justcallmeclassy

iTrader: (1)

Get the block number off the engine, so you can find out if it really is a 350 and what it came out of. Look into getting a limited slip rear end too, you can sometimes find them out of fourth gens for around 200 or so, probably biggest bang for your buck right there. Aim for a 3.42 gear ratio. Perfect for these cars, although we don't know your specs lol. Also look into your tq if you're an auto guy. The stock one stalls at 1300. The vette one around 2200ish. The vette converter was also used in 98 S10s with the 4.3. That would also make for a cheap very effective upgrade to your car. With that you'd have no problem wiping the floor with a cfi corvette. But as its already been said you're going to run like crap if that 350 is on the 305 tune. If you can't afford to get the tuning equipment get one out of a 350 tbi caprice copcar, engine code L05. Wont be perfect but better. Make you you have 350 injectors as well in your TBI, or you'll definitely run lean.

you'll find more than you ever cared to know on this beautiful website

Reyes'91

I'm honestly a little overwhelmed. But Thanks for the feedback. It'll take a little while to analyze it all. For sure getting it checked out though.

justcallmeclassy

iTrader: (1)

Man that's understandable lol. Everybodys gotta start, if you really wanna make yours the fastest **** you can, read and read and read on tgo. Everything you ever needed to know.

Get that block number tho and post it on heere, should be the drivers side back of the motor.

Reyes'91

How many digits is it supposed to be?

justcallmeclassy

iTrader: (1)

Honestly I don't remember. Im at work or id just step outside and look. Google it or search lol

Reyes'91

14094047 LN GM 257
This is what I found on the driver side.

InfernalVortex

iTrader: (4)

Look on the block for a 3 digit number stamped in various places. If your engine is a newer engine it will have it on the deck pad behind the driver's side cylinder head near the firewall, but that's usually so hard to get to that you may want to use another method.





Look behind the cylinder heads on the driver's side.

Another thing you can do is pull off the valve covers and get us the head casting numbers. They will give us more hints as to what it may or may not be.



This number that ends in "416" is the casting number... the last 3 digits are enough to identify one casting from another, and so we generally refer to heads by their last 3 digits. Ie 906 or 062 for Vortec heads. 193 for 350 swirlport truck heads, 187 for 305 swirlport heads (factory in your car), 083 for L98 TPI 350 heads, and 081 for 305 TPI heads.

There's always the possibility that someone swapped heads on it, but I generally think people are too lazy to do head swaps and why they would intentionally go through teh trouble to put swirlport heads on anything in a Camaro is a mystery to me unless it's stock to that engine. It's not 100 percent, but it's enough that I will usually call it on the spot there.

justcallmeclassy

iTrader: (1)

I think that number you posted mightve been your exhaust manifolds

VMX12Rider

Honestly, a stock ceasefire 350 vette VS, worse case, a stock TBI 350 Camaro. The Camaro has the power (Barely) advantage, and in a drag race, frankly, the solid axle will work mo bettah. The vette is going to be lighter (Barely, again) I imagine you're both automatics, both 700R4s, both probably running damn near the same rear gear. Frankly to me, it sounds like a Driver's race. It's going to be won or lost on the launch. And while people may be crying because it's not a 9 second race.. watching two cars go across the line 2 feet apart is still exciting.

v10viper04

I have heard of many 84 C4's weighing in at under or just over 3000lbs. Most thirds are 3300+ without a driver. Vette has an advantage in weight AND HP. (if its a 350 TBI you are looking at around 180hp. Maybe 200hp if your luckey. Vette has 205hp. (Probably the same numbers at the ground) Same torque numbers also. The Crossfire vette was VERY pathetic stock BUT they can be woken up. I know of a few guys in the C4 community running 12's or better with the Crossfire setup. It all depends. No one here can tell you what's going to happen unless you supply mods. Head casting numbers, cam specs, exhaust, gears, etc. Also VMX12Rider the F-bodies never came with a 350 TBI engine stock, if it is the stock L03 forget about a race.... That pathetic L83 will walk that even more pathetic L03. The 80's were not good to engines unfortunately...

midias

Did you ever figure out what engine you have?