4.1 Engine Wanted SoCal

[terik.m]

I'm looking for a 4.1 in the SoCal area. The one I have is cracked.

 

[mario987]

I have a 4.1 short block. 200 obo

 

[terik.m]

I have a 4.1 short block. 200 obo

whats your location and the casting # on the block? oh and do you have the crank too?

thanks
terik.m

 

[black owned]

291 casting

Got a 291 casting 4.1 here in riverside,do you need the crank also?951 591 3312 Raymond

 

[terik.m]

Got a 291 casting 4.1 here in riverside,do you need the crank also?951 591 3312 Raymond

I'd like to have the block just for now because I want to go DLS stroker. If someone has wants to sell me the entire short block with the crank I'd probably end up selling the crank on here. I have found a few 4.1's out @ the local wrecking yards for under $200 bucks but I don't wanna go down there and pull it just to find out I picked up another with a friggin crack in the deck lol. If the block has no cracks then I am willing to drive pretty much anywhere in the southland to come pick it up.

 

[black owned]

I'd like to have the block just for now because I want to go DLS stroker. If someone has wants to sell me the entire short block with the crank I'd probably end up selling the crank on here. I have found a few 4.1's out @ the local wrecking yards for under $200 bucks but I don't wanna go down there and pull it just to find out I picked up another with a friggin crack in the deck lol. If the block has no cracks then I am willing to drive pretty much anywhere in the southland to come pick it up.

Well lmk what your looking to spend,mine is more than 200.00 and if you could be kind enough and let me know where the wrecking yard is with the other 4.1's I would appreciate it.I will gamble on them.call me

 

[750H.P.V6]

Just as a question. If you are finding stock N/A 4.1 liter blocks with cracked decks (which is very common) what makes you think the block won't crack when you build a stroker and turn up the boost? If you think I'm being a wise ass I'm not, just trying to save you some aggravation. Stick with the 3.8 block and you'll be much better off in the long run.

Neal

 

[terik.m]

Just as a question. If you are finding stock N/A 4.1 liter blocks with cracked decks (which is very common) what makes you think the block won't crack when you build a stroker and turn up the boost? If you think I'm being a wise ass I'm not, just trying to save you some aggravation. Stick with the 3.8 block and you'll be much better off in the long run.

Neal

Good question. I have read tons of threads and it seems that 291 blocks are the ones to build because of the cracking issue. Mine is a 553 so I guess thats where I went wrong when I pulled it. I read a thread on here, where I believe Otto built one that put down almost 700hp on the dyno using a T-Netics 76 @ 25#s. Have you experienced cracking a good 291?

 

[black owned]

Good question. I have read tons of threads and it seems that 291 blocks are the ones to build because of the cracking issue. Mine is a 553 so I guess thats where I went wrong when I pulled it. I read a thread on here, where I believe Otto built one that put down almost 700hp on the dyno using a T-Netics 76 @ 25#s. Have you experienced cracking a good 291?

i read the thread also.....seems like they know something back there,i even asked for the combo so i could possibly duplicate it...seems like theright parts and tuneing..

 

[750H.P.V6]

I bought a 4.1 liter shortblock from a friend a number of years ago. I really only wanted it for the rolled fillet crank. I compared it to a 109 block in terms of the material in the lifter valley area and the deck thickness. Also in the 3.8 block the head bolts are recessed below the deck surface and create less distortion of the cylinder when the heads are torqued. Based on this I decided not to use the block and it found a home in the dumpster.

My thought is that once you add up all the money that will go into machine work, assembly etc. There will be a whole lot of heartache when the block cracks and you have to start over. I've had my share over the years and it's isn't worth effort in my opinion for 20 or so cubic inches worth of displacement when a properly prepped 109 motor will run 9's in a full weight car.

Neal

 

[terik.m]

I bought a 4.1 liter shortblock from a friend a number of years ago. I really only wanted it for the rolled fillet crank. I compared it to a 109 block in terms of the material in the lifter valley area and the deck thickness. Also in the 3.8 block the head bolts are recessed below the deck surface and create less distortion of the cylinder when the heads are torqued. Based on this I decided not to use the block and it found a home in the dumpster.

My thought is that once you add up all the money that will go into machine work, assembly etc. There will be a whole lot of heartache when the block cracks and you have to start over. I've had my share over the years and it's isn't worth effort in my opinion for 20 or so cubic inches worth of displacement when a properly prepped 109 motor will run 9's in a full weight car.

Neal

From what I read on 291 block prep, the head bolt holes should be drilled a little bit to reduce cyl distortion right? I guess all the reading in the world cannot replace real world experience but it seems that motors going boom is an inherent danger that anyone faces when modding engines. 109s are tuff but a lot of guys on here manage to destroy them somehow too. I am not a full time racer and my car will see very limited track time. According to numerous threads a 4.1 stroker can produce high hp numbers with boost in the 18#-24# range. Maybe I will read up a bit more and call a few builders to see what can be done to get this accomplished.