My idea on how to make a hot air faster!

[Camfreek]

I have been thinking, and I have way to much time on my hands for this! Let me know what you guys think and if it is even really a realalistic idea? Ok we all know that our hot air cars seem to lack a little bit. Well my 84 is down for repairs right now. I need to rebuild the motor in it. I was trying to find a 4.1 motor to add a little more pep to the car. Well with no luck finding a 4.1 I ran across a strocker kit made just for the turbo charged 3.8 motor. My idea is this. Lets say I find a 4.1 motor and install the stroker kit in it as well, I know I will have to change out the pistons for it, but boy would that make one big cubic inch V6 turbo motor You guys think it would add more power and even be worth the time to venture into somethin like this? I figure the car would look bone stock and have damn near a 5.0 V6???

 

[SloGN]

well lets do the math here


the biggest stroe crank that i know of is a 3.62 buick motorsports crank the other cranks are 3.59. when using the 3.62 crank the walls of the oil pan rails have to be ground down to clear the rod bolts unless you use chevy rods and have the crank turned to match it. the stock bore on a 4.1 is a 3.94.


using a stock bore 4.1 and using a 3.62 crank nets a 4.3 liter .

using a 30 over bore 4.1 and using a 3.62 crank nets a 4.4 liter

using a 60 over bore 4.1 and using a 3.62 crank nets a 4.5 liter


I don't really think that the 4.1 block has enough meat in the cylinder walls to bore it out to a .60 over.

and 3.59 stroke with a stock bore is almost a 4.3

there is only 2 cubic inch difference in size using a 3.59 VS 3.62

 

[85GN4CHAZZEY]

Interesting idea though.... I nominate you as the guinnea pig...

 

[turbo6x2]

Why not just stroke the 3.8 block and go with that, heck there's intercooled guys running stock blocks making incredible power and turning low ets. Heck mine is just a 3.8 stock block non stroked and I'm happy with it 100%.

 

[turbo6x2]

well lets do the math here


the biggest stroe crank that i know of is a 3.62 buick motorsports crank the other cranks are 3.59. when using the 3.62 crank the walls of the oil pan rails have to be ground down to clear the rod bolts unless you use chevy rods and have the crank turned to match it. the stock bore on a 4.1 is a 3.94.


using a stock bore 4.1 and using a 3.62 crank nets a 4.3 liter .

using a 30 over bore 4.1 and using a 3.62 crank nets a 4.4 liter

using a 60 over bore 4.1 and using a 3.62 crank nets a 4.5 liter


I don't really think that the 4.1 block has enough meat in the cylinder walls to bore it out to a .60 over.

and 3.59 stroke with a stock bore is almost a 4.3

there is only 2 cubic inch difference in size using a 3.59 VS 3.62

I think this answers your question pretty clearly.

 

[dees75z]

If you were going to go through that much time and money why not just build a 4.3 GM block???

 

[Camfreek]

maybe a dumb idea.

First off the 4.3 GM is a POS, I wouldn't even let my dog piss on it

Boy it seems like a few people think this is a dumb idea and it might be. It was more or less just a stupid question.

I figured I could get the most cubic inches in my car and make it look bone stock under the hood, then I could really blow peoples minds

As far as the cylinder walls go. I could have them sleaved no problems at all and run real big pistons, then fill the jackects like my 400 in my Trans Am.

I just have way to much time on my hands and I am looking for a way to get a hot air car down in the 9's in street trim and stock looking under the hood.

I take it, it won't happen.

They say bigger is better, at least that is what I thought:biggrin:

 

[novaderrik]

Why not just stroke the 3.8 block and go with that, heck there's intercooled guys running stock blocks making incredible power and turning low ets. Heck mine is just a 3.8 stock block non stroked and I'm happy with it 100%.

even if it isn't faster down the dragstrip than all those built 3.8's out there, the extra cubes will make the car more livable on the street due to having more torque available, which requires less stall speed and gearing to run the same number..
no matter how you build it, a 9 second car will probably cost about the same- but the bigger motor will make the car more fun to drive.

 

[turbo6x2]

I don't know about that the couple folks I know that have built a 4.1 have cracked blocks to show for the their time. I guess it's all about what you want to accomplish and how you go about it. I think what is being done with a stroked 3.8 is pretty admirable personally and it really comes down to how deep are your pockets.

 

[Camfreek]

I noticed that

I had noticed after alot of reading that the 4.1 are known for cracking alot!!
I was just thinking the 4.1 stroker idea out and wanted to see what you guys had thought about it. It is most likly a shoot in the dark but it does have its advantages also

 

[dees75z]

First off the 4.3 GM is a POS, I wouldn't even let my dog piss on it

So I guess the 4.3's in the syclones and typhoons are junk then??? hmmm,.............. thats funny

 

[cwmccray]

Lee Thompson used a 4.1 with great success before he went to a Stage block...

 

[Camfreek]

It is funny!!

So I guess the 4.3's in the syclones and typhoons are junk then??? hmmm,.............. thats funny

It is funny for the fact that my buddy has 2 stock Syclones and 1 Typhoon sitting in his garage and not a single on runs nor has more then 80,000 miles on them, yet my old POS WH1 has well over 150,000 on it and I still smoked his piece of crap trucks, he blew motor trying to race me

Beet on them once they might take it, beet on them twice you'll be picking whats left of the rods up

 

[novaderrik]

So I guess the 4.3's in the syclones and typhoons are junk then??? hmmm,.............. thats funny

the Chev 4.3 is a chev 350 that is missing a cylinder on each bank. the 350 Chev is probably the most versatile and durable engine ever built, but the 4.3 becomes really hit or miss once you start putting any sort of power thru them.


how well would a 4.1 hold up if one was to fill the bottom of the coolant jackets and run a good oil cooler to help with the oil temps?

 

[Dwayne]

Lee Thompson used a 4.1 with great success before he went to a Stage block...

Not exactly true.......we both installed a 4.1 in our cars at about the same time and they ran great on the street.........until mine cracked a cylinder wall at 22 psi and his did the same at 24 psi........I think a 4.1 is great for a street car, I just wouldn't want to hammer one on a dragstrip for very long due to the thin cylinder wall and thin deck.

 

[Dwayne]

Camfreak.......where did you see a stroker kit at ?

 

[turbo6x2]

Not exactly true.......we both installed a 4.1 in our cars at about the same time and they ran great on the street.........until mine cracked a cylinder wall at 22 psi and his did the same at 24 psi........I think a 4.1 is great for a street car, I just wouldn't want to hammer one on a dragstrip for very long due to the thin cylinder wall and thin deck.

I knew about Lee's, didn't know yours did the same thing. My other friend has a crack in his just from being on the street.