Serious 340 build into 361 HiRPM Screamer

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What are the hp limits, in general for that trans.
I have been aware of them for a long time but never sought one.
 
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Another build i will follow , sounds like something i would want to build
 
RAMM said:
I've been waiting to really begin on this build and I'm not waiting any longer. The plan was to build this for the EMC competition in 2020 but the corona agenda pretty much ended all of that and any and all travel into the US is forbidden for well.....

I've decided to pull out all the stops and build this with no real rules to follow. There will be compromises of course as this does have to run on pump premium 91-94 available here and it does have to have a modicum of manners of driveability. Looking for peak HP in the 540 range @ 7000-7300 RPM--the torque will take care of itself. This engine is destined for my Shop/Promo Truck which is a '83 Shortbox D150 lowered, 275/18 and 305/19 mated to a Supra R154 with a 3.9L V6 Dakota bellhousing.

The build:
340 block 4.08" -4.100" bore
318 Forged crank offset ground 3.450 stroke 1.850" RJ (Solid Rod Journal)
Pankl 6.200" rods .708" pin
Custom Mahle Forgings with their amazing 1mm/1mmNapier/2mm ring pack
EQ heads (Australian castings hopefully)
T&D Stainless Rockers 1.7/1.8 mated to custom machined bedplate
Custom Solid Flat Tappet (Rollers are too failure prone for real street use and mileage)
Schubeck Flat tappets
Weiand 7545 X-celerator
Holley XP 650-750
Hedman truck headers with some custom touches

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Short block is close to mine. 4.080 over 340 block with a 3.45 forged crank. I went with BME aluminum rods.

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RAMM said:
Yes! I've been looking for a set for some time now, I appreciate any help locating a set for purchase.
I'd probably work with Comp Cams on the lobe design considering the high rocker ratios. Yep, solid rollers eventually spit their axles out. I fully plan on getting on 400 series highways and maintaining 120-130km/hr which will be 2800-3000rpm for hours on end, I don't want to be thinking about roller lifters putting me on a flatbed. J.Rob
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i hope that 120 - 130 km/hr for hours includes a trip to P.E.I. In the future :poke: .That will be a sweet engine for sure .
 
79410aspenrt said:
Short block is close to mine. 4.080 over 340 block with a 3.45 forged crank. I went with BME aluminum rods.
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What did you do for pistons?
Aside from the Bill Miller aluminum rods, I have what you built. (Bottom end)
 
RAMM said:
Monday or Tuesday I can post some pics of some very Big $$$ custom short travel hyd rollers that have about 2000kms on them. You won't catch this failure by keeping an eye on lash either. There's just too much load on those little itty bitty parts. J.Rob
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be waiting for those pics , i've been running cheap hyd rollers for 8,000 km have not had a problem "yet" will be interested in what to look for as 90% of my driving is highway at 2500 to 3000 rpm
 
RAMM said:
I've been waiting to really begin on this build and I'm not waiting any longer. The plan was to build this for the EMC competition in 2020 but the corona agenda pretty much ended all of that and any and all travel into the US is forbidden for well.....

I've decided to pull out all the stops and build this with no real rules to follow. There will be compromises of course as this does have to run on pump premium 91-94 available here and it does have to have a modicum of manners of driveability. Looking for peak HP in the 540 range @ 7000-7300 RPM--the torque will take care of itself. This engine is destined for my Shop/Promo Truck which is a '83 Shortbox D150 lowered, 275/18 and 305/19 mated to a Supra R154 with a 3.9L V6 Dakota bellhousing.

The build:
340 block 4.08" -4.100" bore
318 Forged crank offset ground 3.450 stroke 1.850" RJ (Solid Rod Journal)
Pankl 6.200" rods .708" pin
Custom Mahle Forgings with their amazing 1mm/1mmNapier/2mm ring pack
EQ heads (Australian castings hopefully)
T&D Stainless Rockers 1.7/1.8 mated to custom machined bedplate
Custom Solid Flat Tappet (Rollers are too failure prone for real street use and mileage)
Schubeck Flat tappets
Weiand 7545 X-celerator
Holley XP 650-750
Hedman truck headers with some custom touches

View attachment 1715773789

View attachment 1715773790

View attachment 1715773791
Click to expand...
As much as I would like to be excited for you I find I'm much too jealous.
 
RAMM said:
Monday or Tuesday I can post some pics of some very Big $$$ custom short travel hyd rollers that have about 2000kms on them. You won't catch this failure by keeping an eye on lash either. There's just too much load on those little itty bitty parts. J.Rob
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That’s a great build Jesse. Kim
 
'68cuda416 said:
nICE ROCKERS

Not really looking for a debate but I will kindly disagree with you on the roller cam/lifter issue for a street driven vehicle as being problematic. I have ran 2 different horsepower level engines on the street with significant time and raced both packages and both engines used different brand of not only cams but also lifters with zero issues. Obviously your statement was probably formed off of personal experience which I respect but at the same token my personal experiences produced different results.
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I had this engine come in for a refresh and just happened to notice these axles had partially slid out and were almost making contact with the lifter bores. Imagine the carnage this would have caused. These are short travel Hyd lifters that had .003-.004 preload. First time I see this--it's usually not this subtle. I don't trust 'em . J.Rob

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While we are on the topic…what brand of available solid lifter would you recommend?
 
RAMM said:
I had this engine come in for a refresh and just happened to notice these axles had partially slid out and were almost making contact with the lifter bores. Imagine the carnage this would have caused. These are short travel Hyd lifters that had .003-.004 preload. First time I see this--it's usually not this subtle. I don't trust 'em . J.Rob

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Not that it may make a difference to you but all my stuff is solid roller and i only use the very best or next to the very best brand components and that in itself has proven to be a reliable combo for my cars
 
'68cuda416 said:
Not that it may make a difference to you but all my stuff is solid roller and i only use the very best or next to the very best brand components and that in itself has proven to be a reliable combo for my cars
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Ok, spill it. What’s the best and the next to very best solid rollers. Kim
 
More info on the truck!! Love to see some pictures.

Motor is cool, too.
 
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