lets talk natrually aspirated

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But ok theres a bunch of G4JS heads sitting at the jy. But some things are keeping me from pulling it.
1. question: why do i need a adjustable cam gear for one of the cams? as i heard it would be to fit the belt. but isnt the 4G64 DOHC belt identical to the G4JS?

To set the timing, if you prefer for obvious reasons: Milled head, decked block, etc. At least one adjustable cam gear WITH an Evo cam gear. The 4G64 DOHC belt will make the swap a breeze. The G4JS cam gears will not work with the 4G63/4 belt and vice versa, or stick with the G4JS cam gears and belt.

2. question: Can i use a G4JS belt? i really need some ones expertnesses.

See answer to question number 1

3. The only thing i would need from the evo is(cant remember the name) but are ecu cant read the G4JS one for timing. Where can i get this part?

Are you talking about cam sensor? Swap the 4G64 cam sensor, housing, and wheel to the G4JS head. The Evo and 4G64 has the same cam output signal.

Im pretty close too just running down there and pulling a head. All the sonatas in there are under 140k and the one i got my pistons was 86k.

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Made some answers, head swap isn't that bad. yes the list is drawn out and frighten but it's really not. Beside, why not try to swap the whole G4JS in your 8G?

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Originally Posted by mysticj

Made some answers, head swap isn't that bad. yes the list is drawn out and frighten but it's really not. Beside, why not try to swap the whole G4JS in your 8G?

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why cant i swap the whole G4JS? I posted it in my first post. Basically that engine has no adjustable cam gears and as i read in the link i posted^ the teeth count is different from the evos and 4G64. That would of been my most favorable option.

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Originally Posted by mysticj

Made some answers, head swap isn't that bad. yes the list is drawn out and frighten but it's really not. Beside, why not try to swap the whole G4JS in your 8G?

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Thanks for painting that picture better!. But im not a fan of cutting harness wires is this necessary when doing the swap?

I dont mind un wrapping the wire loom to pull out the wires more.

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Originally Posted by Exhaust power

why cant i swap the whole G4JS? I posted it in my first post. Basically that engine has no adjustable cam gears and as i read in the link i posted^ the teeth count is different from the evos and 4G64. That would of been my most favorable option.

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Swap the G4JS oil pump, crank t-belt, and cam gears for the 4G63/4 ones, then you can add adjustable cam gears to it.

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Originally Posted by mysticj

Swap the G4JS oil pump, crank t-belt, and cam gears for the 4G63/4 ones, then you can add adjustable cam gears to it.

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How about the the crank shaft gear?. Yeah That would of worked also. but to late now and price wise they would be around the same.

If you find a G4JS head untouch, you are good to go but remember the valve springs are weaker than the Evo valve springs so upgrade them to some used Evo ones. BTW, G4JS pistons with 4G64 head=11.5:1CR

Good to know ill deff end up pulling the head ill just have to wait longer to put it on. 11.5:1 is to high for my likings.

that is a perfect ratio. What is too high about it? If you want to see some good number low compression is not the way to go

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Originally Posted by mrg7243

that is a perfect ratio. What is too high about it? If you want to see some good number low compression is not the way to go

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Im good with the 10.0:1. Im not an expert so im not going to say much but im not sure if the CR will match my upgrades.

Just to clarify...The G4JS pistons wont go in an clear the valves without having the +1 mm valves? Am i wrong?

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Originally Posted by The_fresh_Galant

Just to clarify...The G4JS pistons wont go in an clear the valves without having the +1 mm valves? Am i wrong?

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where did you here that from? they drop in and clear the valves. But according to mystic they might not clear with a aggressive cam. That Info is here in this thread

whats a +1 mm valves? a shorter valve or something?

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Originally Posted by Exhaust power

where did you here that from? they drop in and clear the valves. But according to mystic they might not clear with a aggressive cam. That Info is here in this thread

whats a +1 mm valves? a shorter valve or something?

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a +1mm valve is a valve that is actually 1mm oversized the stock one, you can open up the valve opening, and do a bigger port allowing more are and whatnot in.

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Originally Posted by mrg7243

a +1mm valve is a valve that is actually 1mm oversized the stock one, you can open up the valve opening, and do a bigger port allowing more are and whatnot in.

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Ok haven't heard of that term in a wile. Im not sure where you got That from but the pistons will clear fine. I believe the clearance will decrease with a bigger valve so clearance should to be taken into account.

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where did you here that from? they drop in and clear the valves. But according to mystic they might not clear with a aggressive cam. That Info is here in this thread

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A mild combo like HKS 272/264 & BC272 will most likely clear, something like Kelford 272 or Tomei Procam will need the pistons to be clayed to check for clearance.

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Originally Posted by mysticj

A mild combo like HKS 272/264 & BC272 will most likely clear, something like Kelford 272 or Tomei Procam will need the pistons to be clayed to check for clearance.

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yeah claying definitely will help determine clearance. So for right now ill run stock G4JS cams/springs and when i get the blox 264s ill swap in the evo springs and later maybe a 272 intake.

ok ok, my bad i was actually thinkn +1 was actually a shorter valve to clear the height of the G4JS.

eclipse ecu is your best bang for the buck if your 5 speed, dual ecu's if your not

the eclipse does have a knock sensor so and evo ecu is not necessary for that reason, im using a 02 eclipse 5speed ecu and flashed an evo rom into it no problems there you just need to adjust the tables

you need the evo reluctor to go on the end of the exhaust cam, get it from mitsu and dont forget the bolt also its like $20 if i remember correctly

i highly suggest you get the evo intake manifold, the stock g4js intake manifold works fine but is too tall if you decide to use a straight across strut bar it wont allow for clearence, the long runners are nice for a little torque boost tho.

if you have other questions post them on here and i'll try to answer them as best i can but its been awhile since ive been heavy into this stuff.

i have pictures of a lot of stuff so if you need something let me know and ill see if i have them to post.

goodluck with your build

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Originally Posted by underated

eclipse ecu is your best bang for the buck if your 5 speed, dual ecu's if your not

the eclipse does have a knock sensor so and evo ecu is not necessary for that reason, im using a 02 eclipse 5speed ecu and flashed an evo rom into it no problems there you just need to adjust the tables

you need the evo reluctor to go on the end of the exhaust cam, get it from mitsu and dont forget the bolt also its like $20 if i remember correctly

i highly suggest you get the evo intake manifold, the stock g4js intake manifold works fine but is too tall if you decide to use a straight across strut bar it wont allow for clearence, the long runners are nice for a little torque boost tho.

if you have other questions post them on here and i'll try to answer them as best i can but its been awhile since ive been heavy into this stuff.

i have pictures of a lot of stuff so if you need something let me know and ill see if i have them to post.

goodluck with your build

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Did you ever 'finish' your NA build?

naw i shipped out before i got to swap in the evo i/m, new clutch and flywheel, and do the tuning. i just got the car smogged (another benefit to evo rom, there is a patch to pass emissions testing no matter what). its running way rich and i havent driven it for a little over a year so im getting back into it and first getting in corner balanced sway bar and rear camber kit and aligned then manifold and clutch/flywheel then im going to jump into tuning it

i work too much now and im in an apartment so i dont have a garage to work anymore i gotta take it to the autoshop on base

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Originally Posted by underated

naw i shipped out before i got to swap in the evo i/m, new clutch and flywheel, and do the tuning. i just got the car smogged (another benefit to evo rom, there is a patch to pass emissions testing no matter what). its running way rich and i havent driven it for a little over a year so im getting back into it and first getting in corner balanced sway bar and rear camber kit and aligned then manifold and clutch/flywheel then im going to jump into tuning it

i work too much now and im in an apartment so i dont have a garage to work anymore i gotta take it to the autoshop on base

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Ahh I see....good luck man, and thanks for your service