Advice on my "stock" 340 build

[Dartswinger70]

as long as it jumps up in RPMs fast and stays there long enough to make the power.

 

[junkyardhero]

so i asked my engine rebuilder about what lifters he will use on my 340, he replied johnson hy-lift... do you guys think thats a good choice or should i place a wanted ad for some used 340 lifters and have them re-surfaced?
my engine guy said hes never had a problem with them....

hy-lifts are great. OEM replacement melling lifters work great too. never had a problem with them. or have a set refaced.

whatever floats your goat.

 

[TX9Duster]

Be sure to use a good oiling system, for your 340.
A High Volume Melling pump, Wix oil filter, factory windage tray ( if using a stock pan)... and if so, make sure it is baffled.

 

[mad dog]

Be sure to use a good oiling system, for your 340.
A High Volume Melling pump, Wix oil filter, factory windage tray ( if using a stock pan)... and if so, make sure it is baffled.

i completely agree

 

[mad dog]

Just got the 727 rebuilt and a new Coan converter with 2500 stall. Would you guys recommend that i use a transmission cooler inline with my radiator for this stock build or is it over kill?
i also went with the deep cast aluminum tranny pan

 

[ESP47]

The Blueprint distributor is almost 100% indistinguishable from stock. The only main difference in appearance is the male HEI terminals on the cap and they are hidden when the wires are installed. @Johnny Mac can chime in and tell you more.

They're made by a company called Top Street Performance. You can also get a female cap for them, which I had to do because of the lack of clearance under the wiper motor. Even with the female cap you can barely get an r.c.h. in there between the plug wires and the wiper motor.

 

[middleagecrisis]

Just got the 727 rebuilt and a new Coan converter with 2500 stall. Would you guys recommend that i use a transmission cooler inline with my radiator for this stock build or is it over kill?
i also went with the deep cast aluminum tranny pan

Myself, 100%. Heat kills transmission and I always run an auxiliary trans cooler before routing back through the factory radiator cooler. You spent good money on the trans/converter, take care of it. You can always paint it black to make it stealthier.

 

[Newbomb Turk]

Just got the 727 rebuilt and a new Coan converter with 2500 stall. Would you guys recommend that i use a transmission cooler inline with my radiator for this stock build or is it over kill?
i also went with the deep cast aluminum tranny pan

That’s not enough stall.

If you want it to run like it should you absolutely need to get the Chrysler engine book and STUDY it. Hard.

The number one reason why some engines run better than others and Rusty nailed it. Tolerance stack up.

Most of these engines came through with 9:1 compression. I’ve measured some that were 9.5:1 but not many.

The correct fix, per Chrysler so it’s not something I’m pulling out of my *** is you MUST deck the block so the pistons are out of the hole. How much depends on your particular heads.

You need to equalize the quench pad of the heads and it’s not hard to do.

Remove the minimum from the heads. With 10 head bolts you want the heads as thickness they can be.

You do that and it will run like a scalded dog.

BTW I just did a dyno on a 340. Measured 10.48:1, 280/.509 lift Chrysler circle track cam, a ported Strip Dominator and 1 7/8 headers.

It made 413 hp at 5500. It made a little over 400 torque from 3500-5500.

It’s basically stock with headers, a terribly small cam and headers.

 

[jbc426]

Stock? It's too early in the morning to read this kind of negativity on here. At least go Day 2.