how many 340's here will do 13's

[422STROKER]

are these just ported factory heads ?

They are just rebuilt stock heads.

I guess all he needs to do is toss a set of 4.30's in and he'll go 12's so it really shouldn't matter.  I wish I knew that sooner I would have saved a bunch of money.LOL  Wait a minute not sure how streetable 4.30's would be on the highway.

Tom

[71chally416]

are these just ported factory heads ?

They are smogger 1.88 heads rebuilt with 2.02" valves. It would be hard to duplicate for the money by the time you clean them, install guides, the valve job and all new parts. No porting, but a great base for a head porter to work with.     

[72hemi]

THis is starting to make me think. I have a 318 with 340 heads a bigger cam and 3.91 gears I wonder what I would run with my car?

[71chally416]

I guess all he needs to do is toss a set of 4.30's in and he'll go 12's so it really shouldn't matter.  I wish I knew that sooner I would have saved a bunch of money.LOL  Wait a minute not sure how streetable 4.30's would be on the highway.

Tom

A 340 needs gearing more than a stroker motor does. It doesn't have the low end TQ to get the car moving, especially with low compression. You're not gonna be doing any 3 hour 70 mph trips or winning any mileage contests, but otherwise they're fine. Conversely, I think gears like that with my current 416 motor would just propagate the traction problem I already have. I have a brand new 4.56 posi chunk sitting in my basement that will stay there. I don't need it.

IMO, with a big stroker motor you should go with a single plane intake, a larger carb and bigger header tubes to try to rock the TQ curve higher. There will still be plenty to get the car moving. A stock or near-stock convertor would probably be best too. Dumping all of a stroker motors TQ on street tires when you try to launch the car is a sure way to have horrible 60 ft times with tire spin. If the part combo you have is something better off on a smaller motor, like small tube 1 5/8" headers, a dual plane intake, a 3,000 stall convertor and a smallish carb you'll have a tire burner that's just gasping for air when you go through the traps trying to feed all those cubes. That gives bad 60 ft times and a MPH that should be better. It's all in the combo of parts and what your suspension and tires can handle. My  

[mikerallye]

Can you get away with putting a 100 hp shot of nitrous to reach the low 13s?   

[mikerallye]

I think that maybe I am aiming too slow. Seems like most of the small blocks here are in the 11 second range. Any idea on how to get there with my current combo? 

[torredcuda]

My stock J head with 2.02`s, 9.2-1 engine combo with a 2800 stall  727 and 3.91`s went 13.26 @ 102.11`s will take a bunch more hp than your combo makes.I`d throw in some 3.91`s that will still be bearable on the street and get a decent stall converter and shift kit and you should easily get into the 13`s.Your best bet is to take it to the track and test and tune,test and tune.You can easliy drop anywhere from a couple tenths to over a second with nothing but timing and jet,squirter,pump cam changes.A carb change might help also I dumped the vacuum secendary carb and went double pumper and will never go back except gas milage $ucks.11`s are a long way off for me also but I am tasting that 12.xx ! 

[LAA66]

 Best time mine did was 14.2 with street tires (Bias ply), mild cam, headers, intake, and 3.23's. I'm no pro though, getting off the line without spinning was the worst problem.

[71chally416]

Can you get away with putting a 100 hp shot of nitrous to reach the low 13s?   

Sure. But you better have a good fuel system and you better roll the timing back when it's on or you'll be looking for another motor. Forget what the instructions in the hit say, you need at least a 3/8" fuel line with a good electric Holley blue pump to use nitrous. Retard the timing about 8 degrees (like 30 total) and you'll be safe.

[71chally416]

Best time mine did was 14.2 with street tires (Bias ply), mild cam, headers, intake, and 3.23's. I'm no pro though, getting off the line without spinning was the worst problem.

What was you MPH??

[71chally416]

I think that maybe I am aiming too slow. Seems like most of the small blocks here are in the 11 second range. Any idea on how to get there with my current combo? 

11's will require at least 9" slicks, a good suspension and about 420hp.
4.30's or 4.56 gears, a good 3K convertor, ported 2.02" heads and a good cam kit with better springs would be a good start. You can mill the heads to raise the compression. SS springs will do the job. Move the battery over the right rear wheel too. You'll never get there spinning the tires. At least the orange or chrome box ignition and a better coil and good wires should be on the list with a good curve in your distributor. And don't forget the fuel system. A stock pump and a 5/16" fuel line are inadequate for 400+hp.

[inot2old]

hasn't Goody hit the 12's with his 318?  I am surprised that he hasn't chimed in.

[422STROKER]

Goody runs 13.68 best time IIRC with his 318 and 391's and a tight 3500ish converter.

I agree I have a tq motor but a motor that can do double duty.  I have driven 400+ miles in one day and 200+ a few times and many 100+ mile trips this summer already.  I could have gone with bigger and better parts but i got what I wanted a fun street car that runs respectable times and knocks down 17mpg on Highway trips.  Someday I will upgrade the cam and Heads and go with a bigger carb too but I need to have a cruiser before I do so.  Heck i just got back from a 90+ mile round trip to a Golf tournement in my car, loving every mile.  May take it to Lebanon Valley this weekend too.

I thought the OP wanted a Streetable driver so all this is moot now that Nitrous is involved.  TQ is fun on the street though.

Tom

When you going to run your 500+hp stroker at the strip?

[71chally416]

I've got the front end off right now putting glass fenders on. I have some minor repairs to do on the fenders and I want to take care of all the rust I found under the fenders, but nothing serious. And I still have to plumb the gas line under the car because it has the stocker. Gonna take it to my friends shop and use his lift to do that. He's also gonna let me use his slicks when I take it to Atco. It would be pointless to try to run it with the Kelly 275 tires. It had them when I bought the car and they don't hook. Can't afford drag radials right now, but by next season. I'll frankly be real disappointed if it doesn't do at least high 11's at around 120. It's got 92 more cubes, 3 more full points of compression, a better exhaust system, a better Intake, much better flowing heads, a solid cam with a bunch more lift, a better ignition and a much better convertor than the 318 had that did 109. It made more hp and tq on the same dyno than a customers 440 did that does 10.80's @ 120+ in a '65 Dodge B body car with a full roll cage and an all steel body that weighs about the same (maybe more??) I don't have 1/4 mile gears with the 3.55's but the low gear in the tranny and the convertor should make up for that. It doesn't go very far before having to shift into second now with the 2.74 low gear. If I had it to do over I would have swapped in a stock first gear ratio into the tranny and used a stock convertor to drive it on the street. It's just too much gear reduction for this motor. I'll probably do that over the winter after I see where I'm at after I run it. Hopefully I'm not replacing broken driveline parts first It's rude and crude, but it is what I made it to be.    I live in NJ where there is probably more cars on the road than anywhere in America. Driving a rare musclecar on the street all the time here with all this traffic is a sure recipe for a wrecked musclecar when some idiot in a new Mercedes or BMW decides to pull in front of you and stop at rush hour. My DD will continue to be my V-6 Daytona. It gets much better mileage, it handles and stops much better and it's fun to drive too, and I can park it anywhere and nobody will steal it 

[422STROKER]

Should be a sweet ride when ready.  I think your engine will be hungry for parts.LOL  Thankfully for me mine is only hungry for gas lately.LOL

Tom