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258 w/ 4.0 head, or 4.0 engine swap?

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purple72Gremlin View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote purple72Gremlin Quote  Post ReplyReply Direct Link To This Post Posted: Jan/24/2010 at 12:22am
The 4.0 will do high RPMs better than the 258...............................look at the bore X stroke..............between the two engines.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SnailPowered Quote  Post ReplyReply Direct Link To This Post Posted: Jan/24/2010 at 12:51am
I have a 232, the bore is larger than the stroke so the potential for revs is higher. I also haven't looked at the 4.0 bore and stroke, I am growing more and more partial to keeping my stock block in the car...which is probably not the best idea lol. I know that the advances in metallurgy between 1969 and even 1990 were moving in leaps and bounds. If I can't make 400rwhp with a stock block then I will have to switch to a 4.0. What are the options for dropping the stroke on a 4.0?

Since I am in Iraq and have absolutely nothing better to do with my time (which is a lie that I keep telling myself) I looked up the bore and stroke and found that there were SOME engines that ran a 3in. stroke instead of the 3.5in stroke. I think they were saying that a 199 has the 3in and the 232 has the 3.5in stroke...is it possible to run the 3.0in stroke crank in my 232? I realize that I will be losing some of my displacement but contrary to popular belief, there is a REplacement for DISplacement, it comes in the form of a little metal fan that resembles a snail lol. I am looking for higher horsepower than torque, I am not trying to drag race my car.

As I go through and read this, can I get my 232 up to a 99mm bore? How far out can I bore this thing? Maybe, just maybe I can bore it far enough to make up for the loss in stroke and maintain a "rough" 232cid while improving my potential to rev. If I am losing, or have completely lost, my mind feel free to tell me. This is all a big crazy dream and I am a dreamer.


Edited by SnailPowered - Jan/24/2010 at 1:09am
1969 Rambler
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TinMan Quote  Post ReplyReply Direct Link To This Post Posted: Jan/24/2010 at 1:13am
If you go with the Hesco head, don't forget to use their thermostat housing.
Just for kicks, contact 505 Performance and ask for some information on their 4.0L turbo setups. You might be able to get some useful information out of it to keep in mind while building the turbo setup.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SnailPowered Quote  Post ReplyReply Direct Link To This Post Posted: Jan/24/2010 at 1:28am
Well, since I will need to run the turbo to the other side of the engine I think I can get away with fabbing it all at my uncle's shop. My biggest problem with the base model that they show is that it is an air cooled turbo. I will  run one that is both oil and coolant cooled. Thank you for pointing that out though because I am sure that they will be a very valuable resource when I hit stumbling blocks along my way. I definitely didn't know about the thermostat housing either. I am thinking of buying a totaled Jeep and pulling the intake off along with all the EFI sensors that I am going to need. All this is a way down the road, as I said, I am in Iraq and when I am not forced to think about something else I either dream of buying a Harley and riding it all over heck and back, or putting a wrench to my Rambler and making it do things that it was never designed to do.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote hoosieramc Quote  Post ReplyReply Direct Link To This Post Posted: Jan/24/2010 at 7:37am
199 Bore x Stroke 3.75x 3.00
232 Bore x Stroke 3.75 x 3.50
258 Bore x Stroke 3.75" x 3.90"
4.0 Bore x Stroke  3.88" x 3.41" 
 
So the 199 and the 4.0 have the largest bore shortest stroke combos.


Edited by hoosieramc - Jan/24/2010 at 7:39am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote poormansMACHINE Quote  Post ReplyReply Direct Link To This Post Posted: Jan/24/2010 at 8:23am
Wanting to get more from your 6's is great. Combining and bolting parts together is a good start. However there seems to be 2 words that aren't in the 6 builders vocabulary.

                                                           PORT MATCHING
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SnailPowered Quote  Post ReplyReply Direct Link To This Post Posted: Jan/24/2010 at 8:34am
I have moved this discussion to a new topic since I have traveled VERY far from the subject of this post. Thank you all for your help and here is the new post link.

http://theamcforum.com/forum/topic16185_post142568.html#14256

P.S. Port matching is definitely in the future of my project!


Edited by SnailPowered - Jan/24/2010 at 8:35am
1969 Rambler
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