350 NA build

Beigg

Beigg

Club Member
Looking for some input for a friend that is building a NA Chevy 350/slush box auto.

Budget is about $1200, wants to keep the Camaro EFI (carb is not an option) and daily drivable all year.

Trying to maximize the horsepower/torque as much as possible, what would you do and would you do?
 
Nope, not that one. Tune port is much more suited for the low r's vs the carb set up I ran. Those tp vortec intakes aren't cheap either if I remember just seeing them in CHP. There shouldn't be any shortage of tp vortec headed sb's out there on the Camaro forums. I can't speak for those as I was never involved with them (at one point I wanted to do a tp swap but never did. Carbed or LS1 for me on the F-bodies.

Car weighed 3460 w/me in it though. That was with a 2500 stall too.
 
I said to go 383 Carb and do the typical I/E/H/C to obtain most hp/tq. Then they said no to carb and want to stay daily driveable for Michigan all year round. So here I am, just asking for best advice for them lol
 
The power that those links state is just not going to be enough. This might not even be a plausible build lol
 
The 350 is already on the stand and being ripped apart. What can be done to the 350 to have 450+/450+ to the wheels without juice or boost?
 
I have an article at home where they coaxed 520 at the crank out of one, of course that was carbed though. I believe this is the highlights of that particular build. http://www.airflowresearch.com/articles/article054/A-P1.htm I have no idea what the TP will support but I'm sure it's just going to add to the cost and daily mannerism of the engine to get it up to those #'s through it.

Someone else on here has got to have not moved on to the LS engines and have some input.
 
That would be a nice number, but I am pretty much thinking its a crack pipe dream at this point.
They dont want to admit to the shame of still using a 350 probably if they are lol
 
Yea, that particular set up would not play well with the TP. I'd say it's lofty at a minimum. They just want those dyno #'s or are looking for a particular et and that's what they think will get them there? So is the rebuild of the shortblock included in that 1200? Or the sb is set and just need good heads and a good roller cam? That should already be a roller so at least they're ahead in that area but I don't see it happening with the stock intake though. I could be very wrong as well, as you can tell it's been some time since I was up-to-date on my sbc stuff.

I've still got a dinosaur Chevy 350 in the Buick :shutup:

Maybe give Denny (autoroc) a :poke: I think he's been involved with 3rd gen stuff.
 
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$1200, SBC, 450/450 HP/TQ, Tuned Port is not a feasible combination.
Routes you could take.
Vortec heads, tpi Vortec intake.
$200-300 for good stock heads
$350-400 for tpi base intake for Vortec heads
lift is limited to 0.550" or so without cutting valve guides, beehive ls6 spring swap is about $100-125 for gmpp yellow or blue springs and retainers/locks for 11/32 valves. If Speed Density TPI, add in a tune. If MAF TPI, be careful with your cam selection to keep the ecm from flaking out.

Option 2
Import aluminum heads (ProComp etc), shoot for 200cc or so intake runners. Mod an LT1 intake to fit with a remote thermostat setup. There are still guys that will bore the lt1 intake to accept a standard distributor. Can and springs. Get it tuned. The larger runners will get you more flow without going too big on cam and making the ecu go crazy. Stock 48mm lt1 throttle body flows pretty well, though internet lore will tell you otherwise. Still, it's a 400/400 kind of setup.
Heads -$800-900 new, cam/springs can be done for $300 if you buy used. Keep in mind I'm assuming this is a late 80's+roller cam core motor.

Option 3 LSX.. carbed is cheapish, getting to 450/450 is an iron 6.0 short block, 243/799 heads, and a relatively mild cam and springs.

The devil is in the details, headers, accessory drive. Wiring has costs if efi is a necessity. You can do a budget Ls swap, but there are some costs that are hard to get around.

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The #'s off the dyno is what they are after and the its a complete stock engine that needs to be rebuilt as of right now. 1200 is the left over cash to play with from this point forward.
They are going stock 383 with it where it stands now, and I think that is about all they will be able to do with that budget.
 
beertestr said:
$1200, SBC, 450/450 HP/TQ, Tuned Port is not a feasible combination.
Routes you could take.
Vortec heads, tpi Vortec intake.
$200-300 for good stock heads
$350-400 for tpi base intake for Vortec heads
lift is limited to 0.550" or so without cutting valve guides, beehive ls6 spring swap is about $100-125 for gmpp yellow or blue springs and retainers/locks for 11/32 valves. If Speed Density TPI, add in a tune. If MAF TPI, be careful with your cam selection to keep the ecm from flaking out.

Option 2
Import aluminum heads (ProComp etc), shoot for 200cc or so intake runners. Mod an LT1 intake to fit with a remote thermostat setup. There are still guys that will bore the lt1 intake to accept a standard distributor. Can and springs. Get it tuned. The larger runners will get you more flow without going too big on cam and making the ecu go crazy. Stock 48mm lt1 throttle body flows pretty well, though internet lore will tell you otherwise. Still, it's a 400/400 kind of setup.
Heads -$800-900 new, cam/springs can be done for $300 if you buy used. Keep in mind I'm assuming this is a late 80's+roller cam core motor.

Option 3 LSX.. carbed is cheapish, getting to 450/450 is an iron 6.0 short block, 243/799 heads, and a relatively mild cam and springs.

The devil is in the details, headers, accessory drive. Wiring has costs if efi is a necessity. You can do a budget Ls swap, but there are some costs that are hard to get around.

Sent from my DROID BIONIC using Tapatalk 2
Click to expand...

How much $ would you estimate? It can go over those hp/tq #'s lol, just not under to the wheels.
 
450/450 to the tires is ONE PISSED OFF 350!!!! It won't happen my friend. Not with your budget. My advice would be to find a decent set of aftermarket used iron heads, bigger cam, long tubes, and emission free exhaust. Then put a 100-150 shot on it and your there.
 
They are dead set on that number. Wonder what is driving the guy into thinking its possible with that budget? I know spray is def out, his wife and daughter will likely have the keys to it at times. lol
 
I street drive an old school naturally aspirated 350 making well beyond that. Its definetly possible, but not possible on that budget and not with the naturally aspirated tuned port . Even buying good used parts wont get it done on that budget. Only 3 ways to get that hp out of a 350. 1] spray it. 2] Boost. 3] Lots of compression, big cam with good heads, and lots of cfm.
 
Beigg said:
How much $ would you estimate? It can go over those hp/tq #'s lol, just not under to the wheels.
Click to expand...

Which option do you want #'s for? Options 1&2 just had $$ for the bigger ticket stuff. Keep in mind I'm not including stuff like bore/hone and new pistons if the core motor needs it.

I can give you a pretty complete summary, down to the gaskets and bolts. I can also tell you that I've scared away many wannabe customers once I give a COMPLETE price tag for even a basic rebuild with some bolt-ons. But I'd rather give them the real # than get stuck with a half paid-for motor and somebody unable to cough up the rest.

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