Has anyone here done the swap, i rememer reading about it a while ago but havent been around lately, i am looking to build a 2.3 VERY soon, and swapping a 2.4 crank in to make it a 2.5 seems like fun
. I had read that you would need some machining on both the main and rod journals, and of course maching to install the oil pump gear, anyone have it done and know EXACTLY what it takes?? Does anyone know about valve clearnace issues? Machingin seems like no big deal, but valve clearnace issues may be. Thanks guys.
Dreams do come true....
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i don't know too much about it, but you better make good friends with someone who works at a machine shop.
I was a retard, and now I'm permanently banned.
your right about the machined journals...im building mine right now..just havnt gotten enough of it together to put in the car
i only know one other person that has one and he had no valve clearance problems..guess i should mention he used stock compression pistons..but if you REALLY want to read up on your stroker there is like a 30 page sticky at www.quad4forums.com heres the link..you can read about it from the begining
..i dont think they started perfecting it till the end so dont get discouraged if you read it from the begining
http://www.quad4forums.com/forums/showthread.php?s=&threadid=2036
"Freedom 'ought to have its limits"-George W. Bush may 31 1999 (who voted for this idiot?)
I've got the basic parts (all stock parts) to do it.... just saving up for the rods and pistons.
Need to align bore the block mains to match the 2.4 crank, use 2.4 rods, and a set of 2.3 pistons (lower compression from what I understand). Also need to cut off the 2.4 oil pump gear, and put on the new 2.3 one. (VERY easy to do. I used a cut off wheel to remove the old one, and put the new one in the oven for 25mins @ 500*....... it slipped right onto the crank, and when cooled, was like stock)
The only hold up, is the Crank Position Sensor........ not sure what to do about that yet (unless I go stand alone, then not a problem)
SPD RCR Z -
'02 Z24 420whp
SLO GOAT -
'04 GTO 305whp
W41 BOI -
'78 Buick Opel Isuzu W41 Swap
you cant use 2.3 pistons because the wrist pin isnt in the same location. there off a couple millimeters. and since both engines use a zero deck height this would be catastrophic. you would need either custom rods, or 92mm bore pistons for a 2.4 with the 2.4 rod. this would be an .080 over piston incase your wondering. and if your using a used block you would probably want overbore that 1 size so you would be looking at a .100 over 2.4 piston. and as mentioned the main journals need to be widened to fit the 2.3 block.
Don't steal, the government doesn't like competition
first, you have to use 2.4 rods and pistons with the 2.4 crank, but does any have the number to give to a machine shop for the block, and the crank?????
So the main journals on the 2.4 crank are too small and need to be enlarged?? I was under the impression that they needed to be machined down. Spdrcrz, why didnt you opt to use the 2.3 rods and just machine the rod journals to fit them, or are the journals on the 2.3 rods too big for the 2.4 crank?? I take it if there arent clearance issues than the rods must be about the same length for both engines?
Dreams do come true....
<img src = "http://registry.gmenthusiast.com/images/96sunfireconvt/ModdedFireBlue.jpg">
the rods are not the same size from what i understand..and what he means by enlarging the journals is the BLOCK has to be machined..you dont want the crank messed with....if you machine the crank down it WILL SNAP.
Quote:
but does any have the number to give to a machine shop for the block, and the crank?????
304-723-0276 ask for josh
"Freedom 'ought to have its limits"-George W. Bush may 31 1999 (who voted for this idiot?)
2.4 specs.
Crankshaft and Connecting Rod
Main Bearing Journal Diameter 60.031-60.010 mm / 2.3634-2.3626 in
Rod Bearing Journal Diameter 47.975-48.00 mm / 1.8887-1.8897 in
Connecting Rod I.D. at the Small End 22.007-22.027 mm / 0.8664-0.8672 in
Connecting Rod I.D. at the Large End 51.167-51.193 mm / 2.0144-2.0154 in
Connecting Rod Width at the Small End 23.170-23.220 mm / 0.9122-0.9142 in
Connecting Rod Width at the Large End 23.170-23.220 mm / 0.9122-0.9142 in
Stroke of Crank 94 mm / 3.70 in
Piston Pin Diameter 21.995-22.000 mm / 0.8659-0.8661 in
Pin to Piston Clearance Loose @ 21°C (70°F) 0.002-0.011 mm / 0.00007-0.00043 in
Pin to Rod Clearance 0.007-0.032 mm / 0.00027-0.0013 in
2.3 specs.
Crankshaft and Connecting Rod
Main Bearing Journal Diameter 51.996-52.020mm / 2.0470-2.0480 in
Rod Bearing Journal Diameter 47.957-48.00mm / 1.8887-1.8897 in
Connecting Rod I.D. - Small End 22.007-22.027mm / 0.8664-0.8672 in
Connecting Rod I.D. - Large End 51.167-51.193mm / 2.0144-2.0154 in
Connecting Rod Width - Small End 21.900-22.100mm / 0.8622-0.8700 in
Connecting Rod Width - Large End 27.550-27.600mm / 1.0846-1.0866 in
Stroke of Crank 85mm / 3.35 in
Piston Pin Diameter 21.995-22.000mm / 0.8659-0.8661 in
Pin to Piston Clearance Loose @ 21°C (70°F) 0.008-0.017mm / 0.00031-0.00066 in
Pin to Rod Clearance 0.007-0.031mm / 0.00027-0.00122 in
SPD RCR Z -
'02 Z24 420whp
SLO GOAT -
'04 GTO 305whp
W41 BOI -
'78 Buick Opel Isuzu W41 Swap
how would changing the crank make it 2.5L? i thought that had to do with strickly the volume in each cylinder.
http://www.helpelijah.com
Sean McAfee wrote:how would changing the crank make it 2.5L? i thought that had to do with strickly the volume in each cylinder.
By putting in a crank with a longer stroke, the volume in each cylinder will be enlarged due to the piston moving farther down the bore during the intake stroke.
15.3 @ 89.97mph, 14's on the way?
For Sale:
Getrag '00-'02 2.4 8000kms $800
oh so i see. hmm. i wonder if that could be done with a 2.2 engine? anyone know anythign about that?
http://www.helpelijah.com
probably so...and it becomes a 2.5 with an overbore to go with the crank i believe.
"Freedom 'ought to have its limits"-George W. Bush may 31 1999 (who voted for this idiot?)
Thanks sprcz that is what i needed to see
So it seems that all one would need to do to get the rotating assembly good to go is machine the block to fit the larger main journals on the 2.4 crank and take a tiny bit off of te rod journals to fit the 2.3 rods. Then of course swapping the gear and balancing. That sound right to you guys?
Dreams do come true....
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the 2.3 rods are a diff length. they cannot be used with a 2.4 crank. they are designed to work with an 85 mm crank, the 2.4 is a 94 mm crank. so unless you have a 10mm thick head gasket its simply not possible. 2.3 pistons also have a diff wrist pin location so you cant use those either. you need 2.4 rods with overbored 2.4 pistons as i mentioned above.
Don't steal, the government doesn't like competition
yea, you need to use the 2.4 rods with the 2.4 crank...... and a custom set of either 2.3 (moved wrist pin) or custom overbore 2.4 pistons (never seen any that large)
Engine Calculator
Compression Calculator
LG0-2.3 HO
Bore in: 3.62
Stroke in: 3.35
Head cc's: 48
Gasket Thickness in: 0.047
Deck Height (Put .0001 for zero deck) in: 0.01
Dish or Valve Pocket [-] or Dome [+] cc's: -5.19
Number of Cylinders: 4
LD9-2.4
Bore in: 3.54
Stroke in: 3.70
Head cc's: 60
Gasket Thickness in: 0.047
Deck Height (Put .0001 for zero deck) in: .0001
Dish or Valve Pocket [-] or Dome [+] cc's: -2.6
Number of Cylinders: 4
Stock 2.3 = 2260cc or 138 ci (rounded up to 2.3l)
Stock 2.4 = 2387cc or 146 ci (rounded up to 2.4l)
2.4 crank in a stock 2.3 block = 2496cc or 152 ci (rounded up to 2.5l)
2.4 crank in a 2.3 block w/ .040" over bore = 2552cc or 156 ci (rounded up to 2.6l)
That help any?
oh yea...... I've never seen a stroker crank for the 2.2 ohv..... doesnt mean you cant get a custom one...... for a price.
SPD RCR Z -
'02 Z24 420whp
SLO GOAT -
'04 GTO 305whp
W41 BOI -
'78 Buick Opel Isuzu W41 Swap
Sweet, i remember karo telling me a while back, that he can get anything custom maed as far as pistons go, so anyone ask him about the sever overbore sized 2.4 pistons? It seems if all you need is some custom pistons and enlarging of the main journals on the block then this isnt too big of a deal to do.
Dreams do come true....
<img src = "http://registry.gmenthusiast.com/images/96sunfireconvt/ModdedFireBlue.jpg">
unless you've got a stand alone, the CPS is probably the biggest hold up.....
SPD RCR Z -
'02 Z24 420whp
SLO GOAT -
'04 GTO 305whp
W41 BOI -
'78 Buick Opel Isuzu W41 Swap
yeah this WILL be standalone
Dreams do come true....
<img src = "http://registry.gmenthusiast.com/images/96sunfireconvt/ModdedFireBlue.jpg">
brian(spdrcrz),
Since it seems you are already well into this same project idea, have you made any "educated guesses" as to what this sort of BHP this sort of engine will produce? Id imagine your using HO cams so even if you used the 2.3 parts its 180, so 2.6 could be like 200-220?? Are you planning to boost it as well??
Dreams do come true....
<img src = "http://registry.gmenthusiast.com/images/96sunfireconvt/ModdedFireBlue.jpg">
if you are using the ho cams plus the usual bolt ons you should be well over 200hp. the torque number should take a large increase over the stock ho. and in case you didnt know the 2.4 crank is lighter than the ho crank sop youll gain some there as well.
Don't steal, the government doesn't like competition
Its hard to get a good 'estimate' of hp out of it...... I was trying to use Desktop Dyno, but even a stock HO I couldn't get right, to equal 180hp......
My plan......
The stroker bottom end, w/ Eagle 2.4 rods, custom Wiseco pistons, total seal rings, Crytreated & Ported 086 head, Cometic head gasket (if I can get a 2.3 MLS), ARP studs, W41 cams, and N2O...... boost is going back onto my '02 then......
but if I had to guess....... around 250hp......... and with the stronger (and balanced) bottom end, it should have no problem reving to RPM's needed for the W41 cams.....
add 100-125shot, get a good 350-375hp out of it........... possibly more.....
SPD RCR Z -
'02 Z24 420whp
SLO GOAT -
'04 GTO 305whp
W41 BOI -
'78 Buick Opel Isuzu W41 Swap
