MRL Performance 340, WOW!

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Mike--When are you going to un-leash your craftsmanship on a 5.7?????? it will spank those numbers--Not bashing at all here but I would like to see you put your hands on one--Ask me how I know---Swifter
 
Do you think I could get those numbers with those heads alone or would I also have to get a roller cam ? Now I have 398 HP @5700 412 TQ @4300 Stock 340 J heads with mild porting and Mahle 10.5-1 forged pistons not sure the cam as it's changed a few times , hyd close to voodoo 10200703

  • Advertised Duration (Int/Exh): 268/276
  • Duration @ .050 (Int/Exh): 226/234
  • Gross Valve Lift (Int/Exh): .494/.513
  • LSA/ICL: 110/106
You think it's possible to get another 80 HP and 45 TQ with the heads and a streetable hyd cam , or would it need a roller cam as well to keep good reliable street manners .

Thanks
 
Here are the dyno sheets
 

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swifter said:
Mike--When are you going to un-leash your craftsmanship on a 5.7?????? it will spank those numbers--Not bashing at all here but I would like to see you put your hands on one--Ask me how I know---Swifter
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I have a 5.7L in the shop, just never had anyone order up one. Its just sitting here. I have done a few quotes, but none of them came back. Most people didnt like the stroker kit prices. Oh well. Ill bet the day after I get rid of it, someone will want one.
 
As for price, its about $9000 complete carb to pan dynoed and ready to go. Add around $200 for solid roller.
 
I am liking the results.....small cam for that range of power ...great job.

The heads are working for ya........:burnout:
********** 340 BURNOUT *********
 
PoisonDart74 said:
Great job, excessive cost though.
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Good luck building a similar engine, carb to pan, for much less.

Sure, maybe if you build it yourself, but if you send it out to a shop and want a complete dynoed 340 that makes 470 hp I think you'd be in that ballpark.

The 340 I referenced earlier in the thread, a '68 340 .060" over with KB 243's, ported 308's flowing 264cfm at .500", Lunati 60404, windage tray, stock resized rods with ARP bolts, .020/.020 forged crank, RPM AG, Harland Sharp roller rockers, etc, cost me a little over $6k for all the major work/parts, at which point I stopped counting. And that's with some of the parts being bought used, like the "new" Harlands that were used for a test fit only and I bought for half of new. Or the head work that was done at a "friend" price. I know I've got more into it at this point, and had I bought all the goodies brand new out of the box it would have been more anyway. Plus, I did the assembly on a lot of the engine. And I still don't have it on the dyno, and its still not a carb to pan engine, and it doesn't have a custom roller cam.

I think ~$9k for that engine is a pretty fair price.
 
Guess it's a good price for today as my last 340 cost a little over that and dynoed at 479hp, yet that's not the problem I have today.

Today, I want power and I want gas mileage and the old engines just can't do that.

For me the new Hemi is a quagmire in relation to price as well as size and the work involved for installation in an early A-Body.

Any early A-Body is basically worthless without throwing a ton of modification to it.

BTW, for 4500. I could buy a 70's A-Body Dart running a 440 which runs 12.20's, paint it for another 2500. and install a custom interior for 1500. register it for 150. and for the last 350. take my lady to dinner every day for the next 2 weeks, keeping everyone happy :)

Sorry for the rant but there are more things worth just as much, only they come with wheels..
 
9,000 is a fantastic price for a complete package . I spent around 7g 5 years ago and it's 70 hp and 40 tq less , if I were building today I'd go for this deal .
And I rented a hemi challenger , did not gt much better mileage than my Dart , once you put your foot into it they all suck gas .
Please find me an A body with a 440 for 4500 that is not a basket case
 
Money-wise - for a dyno'd , all new (core block/crank) enginethat's not out of line.
I do have a question tho... What piston and "custom ring package" was used? Specifically - what thickness and tension rings? Those are phenominal numbers all around Mike.
 
Come on now, I can not give you all my secrets. Some things just have to stay in my shop.

I am proud of this engine, its a real sleeper. I have seen many 340's making this much power, and more, but not as smooth and unassuming as this one.

Plus you have to look at it this way on price. I have to pay bills and put food on the table just like the rest of you. This is my households only income. I really dont make much $$$ doing this, but it makes me happy and it makes my customers happy. I have been told many many MANY times that I have mad their dreams come true. Thats what its all about. Ill never have the money i had when I worked for Chrysler, but that rat race was going to kill me. And for what, Money? It certainly wasnt for the Love of a dead company. Chrysler Died in 1998, the POS company you see now is just a facade of what used to be. I held out till 2009, that was enough for me.

Now I work for the BEST people in the world, YOU the Mopar Loving Gear Heads.
 
MRL Performance said:
Come on now, I can not give you all my secrets. Some things just have to stay in my shop.

I am proud of this engine, its a real sleeper. I have seen many 340's making this much power, and more, but not as smooth and unassuming as this one.

Plus you have to look at it this way on price. I have to pay bills and put food on the table just like the rest of you. This is my households only income. I really dont make much $$$ doing this, but it makes me happy and it makes my customers happy. I have been told many many MANY times that I have mad their dreams come true. Thats what its all about. Ill never have the money i had when I worked for Chrysler, but that rat race was going to kill me. And for what, Money? It certainly wasnt for the Love of a dead company. Chrysler Died in 1998, the POS company you see now is just a facade of what used to be. I held out till 2009, that was enough for me.

Now I work for the BEST people in the world, YOU the Mopar Loving Gear Heads.
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this is why his engines perform so well! he is passionate about what he is building. he is not working a job he hates for people he doesnt care about. I'd be willing to bet that there are alot of little things that he does with these engines that nobody ever sees or gets charged for. Its all in the details.
 
LOL Thats a SAFE Bet! And its 1000% true. There are things I do inside, that no one else does and other things that not many even know about.
 
MRL Performance said:
And with a solid roller and more port work, Im betting it would make 550HP and closer to 500TQ and Still be Streetable!
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I am skeptical about that as the 418 (the other little blue motor you built and posted here last year) with the 434 Lunati solid roller with ported eddys made 550HP or so. I haven't run the one I have yet (copied that build kinda) but I imagine it will be on the edge of streetability. At least I hope so.

I have a 340 that came in my fish that will get the eddy heads I took off the stroker when I put in the 434 cam. May have to freshen it up and run it to see how it compares to the 416.
 
airwoofer said:
I am skeptical about that as the 418 with the 434 Lunati solid roller with ported eddys made 550HP or so.
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It made 560hp. And what are you saying here anyhow? That it didnt make 90hp and 100tq more than this 340?

The 418 used the same intake, same size 750 carb, and same size headers as this 340. We left a lot on the table with the 418, but that was the plan, shoot for the broad torque curve and not worry so much about the "peak" numbers. If we want to max it out and make it less streetable, a SV intake, 950 carb and 1 3/4 headers would get that 418 over 600hp

And yes I CAN make a 340 with 550hp and still be streetable. Streetable to ME means you can still run your power brakes and Not have to tune it all the time. On the edge, sure but not the ragged edge.
 
What's this power brakes thing you speak of?

Streetable to me means 93 gas, mufflers, air cleaner, valves stay adjusted, rustangs avoid.

That is great power from a 340 indeed. But making one that is "streetable" and making the power of a very stout SB with 23% more cubes makes me skeptical. Just saying.
 
Put it in the car, run it at the track and prove it out with MPH. That's your answer.

This 470hp, 340 should push the owners Duster to right at 119+ in the 1/4.
 
airwoofer said:
What's this power brakes thing you speak of?

Streetable to me means 93 gas, mufflers, air cleaner, valves stay adjusted, rustangs avoid.

That is great power from a 340 indeed. But making one that is "streetable" and making the power of a very stout SB with 23% more cubes makes me skeptical. Just saying.
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Streetable means a lot of different things to different people. To me that breaks down to street able. Or able to be driven on the street.

There might be one station within a 10 mile radius that has 93 octane. I can think of a lot of not very streetable car with mufflers, air cleaners, with valves that stay adjusted.
 
In AL we have 93 at most stations but it is watered down with 10% jokenol. Some brands say 92 but since all of the gas comes from the same terminal it is all 93 unless they blend it down while pumping like one station does.

I doubt my 416 that I copied the heads / cam of the 560 HP one Mike built will be very streetable in the sense most cars are. It will idle lumpy, have lousey gas milage, be kinda loud - but to me that is OK for a street hotrod. Won't have a heater/defroster, AM radio may no work. But it has the wing vents, sounds great, it will also smoke the tires and be a hoot to drive. So far the engine has been very reliable but that was with the hyd 508 cam and I beat the crap outta the motor. Hopefully it will fit under a flat hood.

Around here there are guys who are tickling the 5.99 (1/8th) in what they call street cars. Most have turbo or blowers. One obnoxious fox rustang on a 200 shot is even faster and he drives the car to races 100+ milea away.

Didn't mean to jack the thread. Those are very good results from a pump gas 340.
 
could we get more specs on this "custom" cam? I'm curious as to how this compares to the cam I selected for my 340 build.
 
All we have is pump 91 here in the bay area....Im surprised its even that high as of now...

Nice build for sure! But dang :)
 
That is one impressive engine,and one that has a "happy" sound to it!
 
MRL And yes I CAN make a 340 with 550hp and still be streetable. Streetable to ME means you can still run your power brakes and Not have to tune it all the time. On the edge said:
Really , or can you do it with the old time type cam , or is roller cam necessary ? I'd like to see 150 more HP and keep my power brakes , without going to a roller cam .
Is it possible ? Streetable , power brakes 550 hp my dream 340 .
If only you weren't 1000 miles from here .
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