ENGINES!!! several possible builds on the "differnt" list

[original balzer]

The problem with your friends truck isn't that its too light (none such thing in my mind) its that it has too much torque for its weight.
Not saying it might not run better at the track by adding some weight, but the real problem is there is too much torque that breaks the tires loose. It'd work even better keeping it light, and tuning the motor so that it makes less low end torque in exchange for some higher RPM horsepower.

Exactly my point sir. Take the super huge stroker out and put in a big bore short stroke engine and it would be faster. I think anyway.

 

[kevin400ex]

Just from a spectators observasions, stroker engines seam to help heavier cars or trucks on the drag strip. Witch makes sence, they need the low rpm torque to get them moving.

I have noticed first hand through a friend, that you can have too much power for the car your building. I know that sounds stupid but bear with me and Ill splain it. My friend started building a 78 chevy luv to drag race. it started with a simple 350 swap and progressed into a 4 linked big block monster after a few years. in between that time the truck peaked in speed at the track then took a dramatic fall and lost speed. A few years ago he had built a 327 and dropped it in the s10. He noticed he couldnt get traction so a simple set of ladder bars solved it and it was running in the high 9's.

After that season he wanted to go "all out" as he said and thats when the back half got a tube chassis with 4 link and a ford 9". the bed was just glass skins. The front got a 10 pt cage and glass 1 piece tilt body work. A supercharged 540 BBC by merlin was dropped in. After all was said and done it actualy lost speed once again due to traction issues. It just breaks the tires loose too easily. He has tried all kinds of suspention tuning but wont belive me when I tell him he needs to add weight. My thought is its too powerful and too light. His thought is its dumb to spend all that time makeing it light just to turn around and add weight. He totaly thinks Im up in the night on this but this whole season he couldnt get traction.

the problem is chassis tuning and balance. too much wieght up front, not enough in the rear and the 4 link isnt adjusted correctly.

 

[original balzer]

Yea but we are getting off track here. Does anyone else have a less than typical engine build?

I have put some serious thought into buying a marine supercharged 6.5 diesel. Not exactly an engine build but MaxPF posted a link that lists them with 300HP. I have seen turboed 6.2's and 6.5's ever seen twin set ups, but have yet to see a supercharged version.

Its definatly a differnt route to take on our trucks.
http://www.amgeneral.com/vehicles_gep_productinfo.php

 

[Masiony]

super unconventional engines are great when you break a part on the trail and you have to drive 6 hours just to get to the closest parts store, which is a shucks, and they only carry normal parts...

im with you on the idea of running unconventional parts, but i dont actually like to do it for the sake of having to fix it in a pinch.

 

[kevin400ex]

hows this for different

http://www.youtube.com/watch?v=F_Fcgb_BMKE&feature=related

http://www.youtube.com/watch?v=mVlov_t4fjg&feature=related

 

[original balzer]

I love the rat rod I watch that vid like 2-3 times a week lol.

The PSD jeep is kinda cool but a backwards build for a sand runner by the looks and sounds of it he needs taller gears.

 

[LVJimmy]

Read again and again until you find where I said strokers are not fast. And by the way a 410 is closer to an equil bore and stroke, is it even a stroker? sounds like a bored 400 small block to me. witch would not be a stroker engine.

And to further clairify technicaly a "stroker" engine is one where a longer stroke has been added to a smaller engine in the same family. 383 is a 350 block with a 400 crank. (technicaly you have to bore the 350 block as well to get 383) likewize a normal 427 would be a destroked 454 but a 454 crank in a 396 block would be a stroker 427. I know it gets confuzing but try to keep up or at least just nod your head.

And finaly, yes strokers can be fast in a drag car. All im saying is that "I believe" a short stroke big bore engine is fastER than a long stroke small bore engine.

For example and totaly fabricated. Say you have 2 sbc's 1 has a 3" stroke and a 4" bore the other has a 4" stroke and a 3" bore they should be the same displacement. Other than that they are built totaly identical by the same guy. And lets just presume they come out with identical HP numbers.
THEN we put these engines in Identical cars and time trial them.

Well the faster engine is the one that gets to redline first, right? Witch ones gunna do it?

But I promise you they wont come out the same HP and TQ so its a bust.

I'll put my money on the 4" bore and 3" stroke=more cubes, quicker rev.

 

[original balzer]

I'll put my money on the 4" bore and 3" stroke=more cubes, quicker rev.

Thats a realy bad example that was over simplified to express my point. in reality they dont come out to the same cid but I ment they should. My bad I messed up, I guess thats what I get for trying to splain it when I was tired.

formula for cubic inch displacment is: bore x bore x stroke x .7854 x number of cylenders.

So the 4" bore 3" stroke engine come out as 301.5936 round it up to 302
And the 3" bore 4" stroke comes out to 226.1952

For you metric guys out there to convert to liters simply multiply the CID by 16.39 witch give us cubic centimeters then 1000cc's= 1 liter

Witch means I fubard my whole train of thought.

 

[Masiony]

i wouldnt have done it that way. i would have done Pi x (1/2 bore)(1/2 bore) x stroke x # of cylinders.

 

[tornado427]

user name says it all

big bore short stroke= high rpm fun, but not as good for low rpm wheelin, wish I would have just built a 454 torque motor!