80smetalfan

Hey,

I have a 010 350 that I'm building for a "quick" daily driver. The internals are stock. I'm running untouched Pro-Topline Vortecs, an Edelbrock Performer RPM Air-Gap, and a Quadrajet.

I've acquired some 3.73s and a locker posi, and the vehicle has been stripped of some things, weight of maybe 3200 lbs with driver. I have a 1985 700-R4 I will be running with it to keep the MPG up.

I'd like to see 400 HP (or close to it), while keeping it streetable and pulling decent MPG, like close to 17-20 MPG on the highway. A lot to ask for a 350 carb build, I know, but I'm planning on putting a shallower OD gear in the 700 so that my cruise RPMs are a bit lower. I know the 700 is a question mark with that much power, and I'm considering building it/having it built.

My questions are in regards to the camshaft and jetting on the carburetor. If your not familiar with the casting #, this is a early-late 70s non-roller. I'd like a midrange powerband, something I won't need a big stall for, but will still make power until 5500 RPMs.

The quadrajet is a stock 1985, and all I've done to it is the basic modification of the AV tab, so they open to 90*. I'm someone who's patient enough to jet and re-jet it, which I know I'll have to do to get this thing tuned solidly. I'm just looking for a good starting point.

What would you guys recommend?

80smetalfan

Also should mention that I'm running headers with true duals with gutted cats and flowmasters, on the exhaust side of things.

And I'm running a squarebore -> spreadbore adapter for the Vortec Performer RPM Air Gap, so that the Quad will work.... not sure if that is a detriment to my airflow.

StealthElephant

Pony Killer is into the 12s with a very solid vortec headed setup.

XE274 cam is probably what you'd want to hit that kind of power. I'm using the XE268 and I get 20MPG on the highway.

84305HO

B hanger and either DR or CK rods.

80smetalfan

What kind of power can I expect out of my setup with the XE268?

I'm not sure about running the XE274 on the stock stall....

StealthElephant

I run a B&M 2400 stall with the XE268, the stock TC was dragging my engine down.

Once the engine's warmed up, it idles rock solid at 750 RPM. I talked to pony killer a while back when I was deciding on which cam, and he said the XE274 idles decently. I went on the cautious side and got the XE268, if I had it to do over again I would probably get the XE274.

My buddy ran 13.8 @ 101 at sea level with his Dart Iron eagle (9.7:1 CR) headed 350 with XE268 cam. Thats with a built 200, 3.73 (open) and a 2800 stall. He was pulling 2.1-2.2 60' times I believe. Pony Killer is pulling 1.8-1.9 60' times i think. (he has an 86' Monte carlo)

I'm hoping for mid 13s when I go to the track this month.

Fast355

iTrader: (2)

I ran a 305 with a comp XE-274H with the stock 1,400 rpm converter that was in my transmission for about a year and didn't have any problems except that it took alot of pedal pressure to keep from creeeeping up at lights and the fact that it banged into gear real hard. Engine only made about 13-14 in/hg of vacuum at idle and I didn't have a vacuum canister. I did however convert to hydroboost later on. When I lunched the trans I put a 2,000 rpm S10 converter into it and worked out great.

IROCaholic

Like everyone else said XE268 or XE274. I saw a build in chevy high performence with the XE268 and vortecs that make a little over 400 hp but that was on an engine dyno with no accessories. So youll probabliy make about 375 which is good for high 12's. Either one of these cams is gonna need at least a 2000 stall. There is an S10 converter that works in our 700r4's that stalls at about 2000 that you can get for a little over $100 that a lot of guys on this board use and I have heard alot of good things about I would use it. Do a search for s10 torque converter or something similar to that and you should be able to come up with the part number. Good Luck.

80smetalfan

I'm only running power steering, water pump/mech. fan, and alternator on my belt setup. I've deleted the AC, smog pump/AIR system. And the EGR system. No emissions, NO MERCY!!

80smetalfan

I also ditched my vacuum canister. Excuse my ignorance, I take it that this is going to screw up my idle vacuum. Will a plug fix the vacuum problem, or am I up a creek?

StealthElephant

You mean the charcoal canister?

Fast355 is talking about a vacuum canister that holds vacuum in storage, your car didn't come with one. I'm betting you are talking about the charcoal canister which sits behind the driver side headlight.

I doubt high 12s with the XE268. 400HP is a generous number. Probably 340hp at the engine after accessories. Under 300 at the wheels.

Depending on how you can hook it up and gearing etc etc, low 13s are possible.

IROCaholic

I just found the article I was talking about and they put this engine in an EL-camino and it ran 13.07@102.11. It was called agent 87.

80smetalfan

Yeah, that's what I meant....A little confused. However, I should mention that this 350 and 700 are in a 1986 G-body, with stock suspension, locker posi, and 275/50/15s out back.

Fast355

iTrader: (2)

I was talking about a vacuum canister that you get from summit or jegs for power brakes on a cammed vehicle. Made for a firm brake pedal without one.