what do you think about this stoker kit.

[scottsee]

precision ground 4g64 6 bolt crankshaft w/ set of Top Line bearings
Je .040 over 3.937 stroke pistons
Plasma molly rings
eagle 5.906 lenght rods

total $993

[guitarXgeek]

Looks pretty good to me. I'm not sure about the JE's though, don't hear to much of them with DSMs. Most go with wiseco or ross, but I don't see any reason JE wouldn't work (just not as popular ).

[scottsee]

yea, i've changed my mind. the largest bore je makes is .040, and you have to buy your rings sepreatly. i've decited becasue its going to be the same price at the machine shop, im going to go with a .080 bore. wiesco has a piston/ring kit for .080 over for $400. so im going to give that a shot. i just forgot about the thread, i should have changed it.

[EclipseRST]

holy shit... your boring it .080 over?? i dont know how much i would trust more than .060-.070 over. cause i know the 4g64 is .060 over than a stock 4g63. but still another .020 over on top of that is pushin it man. why dont you just get a 4g64 block and bore it .020 over then you dont have to worry about odd shaping the cylinders with the 2.3 conversion? cause see when you put the 2.4l crank in the 2.0l block the angle of the rod is so great and pressure being put on the piston is so much more, the rod tends to push the piston against the cylinder wall harder, which in return can make the wall oval shaped. but with the 2.4l you dont have to worry about that! good luck

[scottsee]

well, i would have considerd buying a 4g64 6 bolt block if i could have found one around town. being this is my first motor build ever, i also felt better becsue there are more people out there stoking these motors. ii know if you put a 1g turbo head on a 4g64 its basicly a 2.3l 4g64, i guess i could have look longer, i guess i just wanted to stay true to old yeller, besides there more information avalable for the 4g63's.

the reasion i decided to "try" .008 is becasue i couldn't find anyone who has tried it (yet). the fact that weisco has a 100mm stroker .08 piston makes me think its reliable, just not popular. i did meserments last night on the cylinders with my digital caliper. in the scope of the cyinderwall radious,its not a huge increase in cylinder displacement. its larger then average. but i think for 900 for the crank,bearning,rods,pistons i should give here a go. the cylinder wall slapping did consern me a little, im been thinking about how i can help the lager rod angles. im going to call weisco and talk to them about it when i order the pistons. i wonder if they make ball barring wrist pins to help with horizonal friction. im wondering if a combination of running diffrent rings, and heavy sinthetic oil will help seat the rings well. i have alot more reading and talking to do before i actually order everything. im kind of conterdicting my project at the same time though, im doing this because of the information avaliable, but the ony piston/ring set i can find for this is from weisco. if anyone has any suggestions. feel free.

[o*HeR()]

where is the 4g64 from? the vr4 ?

[scottsee]

www.4g64.com

[EclipseRST]

Originally Posted by o*HeR()

where is the 4g64 from? the vr4 ?

hmm... maybe a SEARCH could have been done and this question wouldnt have been asked!


see this is the shit that i am talking about!




anyways to reply to scottsee if you have a 4g64 block it is a 2.4L and if you put the 4g64 crank in a 4g63 block then it makes it a 2.3L but the rod angle is so great on the 2.3L conversion it puts a lot of stress on the cylinder wall and if you are thinking that your goin to bore it .080 over then you might want to look into that! personally if i were you i would run a 4g64 block .080 over with a 4g64 crank so there is no "i hope it works" phrases. know that its gunna work and also know that your not wasting money on something that could crater at anytime.

i'm not trying to talk you out of it, just letting you know there are things to consider and trying to help you not waste your money. if you really want to go 2.3L then i wouldnt bore it more than .060 over just to be on the safe side. there have been a lot of guys that ran and still run the 2.3L but there has to be a reason that no one that i know of has yet to run a piston at a .080 over bore on a 2.3L conversion. but if your willing to gamble $1000 or however much its gunna cost then go ahead, try it out. but i dont know a lot of people, (except major companies cause they have the money) expecially dealing with DSMs that are willing to throw $1000 up in the air to try something out cause no one has. anyways its your decision i just want you to know how i felt. i wish kevin would express his feelings about this cause i am curious on how he would handle or go about doing this. maybe i'll pm him the link and see what he has to say.

[1stGenRocks]

if the 4g64 block is just a 4g63 bored out .60 over then whats the difference between a 4g64 .20 over and a 4g63 .80 over?

[EclipseRST]

the 4g63 has a different size cylinder length (smaller) then the 4g64. so when you do the 2.3L conversion you have to get special pistons with the wrist pin higher up in the piston for the longer stroke. (stroker)

[scottsee]

yeah, dont the 4g64s have a 9mm higher deck head?
yeah, kevin, you word is gold around here. whats up!

i think i've settled on the weisco 2618 336g pistons & xx rings.

[kjewer1]

The 4663 block at 60 over and the 4g64 stock is the same thing. The block is the same casting, they just bore them to thier respective sizes and mill the 4g63 deck more, 6mm I believe (12mm shorter stroke).

Now, when people rebuild 2.4s, they dont hesitate to go 20 or 40 over. But they also arent planning to make 600-700 hp on thier NT block My last motor was at 60 over, or stock 2.4 bore. I have no problems running that at ~600 hp. But you dont want to bore any more than you have to. The stroker idea is to increase stroke, not bore. OTherwise we might call it a borer motor, LMAO.

I run a 6 bolt 4g63 block, 6 bolt Eagle rods, and wiseco stroker pistons in whatever bore I am currently at. Each time I blow it up I take it out another 20. So I pay ~500 in machine work and 400 for pistons. Not bad

But, if you have seen my deck height thread, you'll know that I am going to switch to MAgnus spec Ross pistons. Ross only goes 60 over IIRC. They have a much better quench pad design that should help me avoid knock at high HP. I dont know yet what they cost though. Ross also sells regular stroker pistons for about the same price as wisecos. Wiseco goes to 80 over, ross to 60. I wouldnt bother with JEs, no DSMer has good luck with those things.

The more sever rod angles in the stroker should increase piston side loading and cylinder wall wear, but I dont think I've seen it yet. I have seen some piston wall scuffing, but I think that may be from the skirts. It seems most people soften the corner on the skirts and do other basic mods to the pistons before install, which I have never done. So for now I will attribute the scuffing to the skirts until I disprove it. At any rate, people are making tons of power on strokers and putting tons of mileage on them.

The only reason I would go through the 4g64/4gcs/etc swap would be to run a long rod motor. Basically you still end up running a stroker piston but a 6mm longer rod (since the pin was moved up 6mm on the stroker piston). You end up with 156mm rods and a nice rod ratio/angle. You still have the thinner bore, but marco and others are making tons of power (marco in the 9s). I think I Would feel better with a filled block though at high power.

[scottsee]

im doing .04 just incase..