Bore a 318
#1
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Hey guys i just read the thread about the 408 stroker build and i think thats awesome. Do you guys know anything about doing something similar to a 1990 318? Could i make a 408 out of the 318 or no? i know he is using a 5.9L mag and the internals are diff. Any thoughts or resources would be great guys.
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#2
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UPDATE: I just answered my own question lol. So i think i want to build a 390 stroker out of my 318! Im going to take it slow but do you think i could just bore the factory heads to .030 over instead of getting new heads and what not. And any advice on beafing up a 46RH tranny, i plan on using the truck for off road and towing. Im going to get it rebuilt first but i want to change the gear ratio out maybe lower it? Any thoughts.
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#3
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trans go makes shift kits... about 100-200 dollars for a kit, and they have varied performance levels (though I doubt it changes the capacity). I think they have stage 1, 2, 3 or something to that effect. obviously 3 being the highest, which would be full manual control (would require a shifter... unless you want to use your column shifter lol) if i remember correct the mid-range offers both automatic and partial manual operation (ratchet shifting ect.) I think summit may carry two of them... but its been a while since i checked.
all these kits do is firm up the shifting, making the clutch overlap smaller so's to prevent wear ect.
I dont know much about tranny rebuilds... can you have the ratios changed in the box? or does that require different gears outback?
your truck being a '90, does it have the 46rh? it thought that the 90's had the a518... the difference is negligible at best, i think it might just be the classification... all of them are basically just 727's w/ an electronic over-drive
all these kits do is firm up the shifting, making the clutch overlap smaller so's to prevent wear ect.
I dont know much about tranny rebuilds... can you have the ratios changed in the box? or does that require different gears outback?
your truck being a '90, does it have the 46rh? it thought that the 90's had the a518... the difference is negligible at best, i think it might just be the classification... all of them are basically just 727's w/ an electronic over-drive
#4
#5
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You can do a 402 out of the 318 if you wanted. IIRC the 390 has more torque then the 402.
Are you doing this yourself or having someone do it?
Here's a decent stroker kit on Ebay. http://cgi.ebay.com/ebaymotors/318-D...QQcmdZViewItem
Yes, you should be able to bore the heads. Make sure they're checked for cracks and any damage first though.
Are you doing this yourself or having someone do it?
Here's a decent stroker kit on Ebay. http://cgi.ebay.com/ebaymotors/318-D...QQcmdZViewItem
Yes, you should be able to bore the heads. Make sure they're checked for cracks and any damage first though.
#6
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Thats not a bad price i found some complete kits for like $1700.00. So thats pretty fare. I plan on doing this my self and taking it slow as i have two trucks so 1 for driving and the one im doing this to. Im going to start by breaking the engine down and just start with the block and save up for a crank and than do the heads etc... What would the overbore be for the 402 .040 or .060?
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#7
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You can't go up to a 402 with a 4 inch stroke. Here are the numbers...
displacementchart-1.jpg?t=1241027903
If you want to go higher than a 398, you'll need to go with a higher than 4 inch crank, which requires major clearancing in the crankcase.
displacementchart-1.jpg?t=1241027903
If you want to go higher than a 398, you'll need to go with a higher than 4 inch crank, which requires major clearancing in the crankcase.
Last edited by 95_318SLT; 04-29-2009 at 01:58 PM.