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Join Date: Jun 2015

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Need a little help

I just purchased a 1992 Camaro Rs and I have 305 in it. Everybody is telling me to put a 350 in it. I have a 350 vortec out of 2000 savanna conversion van. My question is is this a good idea and if so do I need to change a lot of things. I really don't know but I am very hands on. All suggestions are very helpful

 

You will have to get a manifold specific to Vortec heads for starters whether you stay TBI or go Carb. Ive heard you need 350 knock sensor, 350 chip, 350 esc module, 350 injectors,..etc But atleast one member here I know of done the swap and used all the 305 stuff and said it worked just fine. Probably leaving a lil power on the table but im sure it will be a big seat of pants difference

 

Ok I have access to the whole engine including the manifold and everything. Would I still have to change everything

 

I would think using the 350 block with the 305 stuff will work but won't be making all possible gains

 

You will need either a carb manifold made for the vortec heads with a tbi adapter or different heads. The 305 tbi manifold won't bolt to the vortec heads.

 

Don't waste your time, and stop listening to everybody. I can guarantee you that if you go with a good set of heads and cam for your 305, in conjunction with a good intake and injectors, good exhaust, coupled with the right stall speed (if auto) you will be very happy with the results. Don't get caught up with the bigger cube is better concept, the people who harp on that are still watching Smokey and the Bandit films. When people go to the track today, you never hear the question of how big is the engine, you'll only hear how big is the turbo, because it no longer matters how big the engine is...

 

OK...well the same turbo setup or whatever just bolt it on a 350..i guarantee youwill make so much more power so why even bother with the 305 unless you want to stay stockish or under 300hp. I have no problem with 305s Ive had a lot of them, I drive one now and they are good engines. But given the choice 99.9% of us prefer a 350 if we can get our hands on one or have the choice.But by all means stop listening to EVERYBODY. EVERYBODY doesn't know I guess.

 

I was thinking about that also. People is also telling me that I can upgrade the 305. I was only getting the complete 350 from top to bottom because my brother wrecked the trans in his van. It seems a lot to swap the engines out so I think I will get it and rebuild it.

 

Street lethal I see you have a 305 with a turbo. Was the build costly?

 

Upgrading the 305 will be much less hassle, as well as you can take your time and buy a few parts at a time. I'm pretty happy with the 305 in my wife's car, and you won't have to worry about sourcing 350 electrical components. Now if your engine dies and you have to buy a new engine, that's a different story, might as well go bigger then. But I'd say it's not necessary with a good 305. Besides that when you make a 305 quick it's always funny to see people not believe you when you tell them it's not a 350.

 

What kind of heads cam intake and injectors do you suggest?

 

Not at all, a lot of it was done in my garage, you just need to spend the money where it counts (injectors, ECM control, stall speed, etc.). The turbo (T72) and wastegate (44mm) were initially ebay brand names, and they worked great, With 30-lb injectors, the 305 made 450 horsepower before the injectors started going static, reaching their limit, and she pulled like a **** with those, easy eleven second car at only 8-psi, and that is because I was running a huge cam w/ported stock heads and ported TPI intake. Lot of work went into the engine, but it cost me pennies because I do my own work; built the headers, etc. Now with 60-lb injectors and a T88, I hesitate to let it loose because something might break in the drivetrain, in fact I know something will, I already shredded two flexplate's, and there is no question in my mind what it is capable of. This is with the T72, don't mind the music, it was all I could find that fit the length of the video...

 

OH MY GOD YOU DON'T HAVE AN AIR FILTER!??!!!?!?!!! Just kidding lol, looks really good. I'd have just left off the music though, engine noise would have been enough lol.

 

I'm still running stock heads with a mild comp cam, I don't remember the specs, it's my wife's daily driver so I just wanted a little bit of pep and a tiny cam lope at idle. She doesn't need a full race car lol. I do plan eventually to swap some new heads, a bigger cam, and ditch the factory fuel system all together and run a carb manifold with an efi conversion like the Fast EFI kit or something similar. Will be much easier and cheaper than trying to mod the factory tbi mess. Just waiting to get her a newer daily.

 

I normally run a screen w/the turbo on the inlet, mainly just for racing appications. If it was an everyday driver though then absolutely, would throw the K&N on there right away. To the OP, I have some parts that I threw up for very cheap if you want to make some upgrades to the 305, also throwing up a TPI intake as well as those 30-lb injectors if you want to change fueling. That is the only real advantage of TPI over TBI, the fueling, as you can go as high as you need without worry of puddling or going too lean...

 

What do you have and the prices?

 

The TPI runners are more than likely sold already, as someone wants them. Same member that I recently sold four L98 throttle bodies to. I am unsure if he wants the lower intake, plenum and injectors, so it isn't essentially a complete TPI setup, but a lot of it is there, would just need other parts to make it complete...

I have a Holley Pro-Injection manifold that was actually designed for TBI, but it was opened to accept a carburetor, and the divider was lowered to maximize power up top. Asking $25.00 for it w/unported runners, will port it out if need be for additional, but your a hands on guy and more than likely can do your own porting. Its non centerbolt style though, so if your running centerbolt valve covers the center bolts need angled washers to sit flush, which are cheap. To run TBI with it again requires an adapter plate, but at this point I would just throw a 650 carb on it for the street and be done with it. Here's a pic...

http://i201.photobucket.com/albums/a...pszvd40ypw.jpg

 

Sounds good, follow the stickies https://www.thirdgen.org/forums/tbi/...i-buildup.html you can keep the LO3 as backup or start changing the internals to run a turbo.

 

I just completed the exact same swap you would have, but I bought an L31 crate motor. Huge improvements. Just some basic issues which I worked out with some tuning and adjusting idle. All is good now

What I did

L31 crate motor 4 bolt from summit
gmpp tbi intake
350 injectors, bored tbi unit out, adjustable fuel pressure reg
new fuel pump
hooker headers
hooker y pipe (no cat)
hooker cat back
3.73 gears with posi unit
sub frame connectors
lower control arms
stronger axels
rear end girdle
I did keep the stock t5 I don't beat the car but bought a stage 2 spec clutch and flywheel
custom chip