How to build a 4G64 for an EVO 8/9
Heres what I came up with on every compression calculator site. That also depends on the head volume cc. I started a thread to see if anyone has actually measured because ross and JE say 47cc and wiseco and manley say 43cc.
If 43 is right, the compression is 10.6:1.
My compression test came up with 190~ across the board. My tuner said that pretty high for a fresh build with only 400 miles on it. He thinks that the compression is also in the 10s.
Im using the OEM 8 or 9. I cant remember what one i ordered. The difference is .042 (evo9) or .030 (evo8). I was thinking about going to the power enterprise .059 gasket. That would drop it down to 9.9:1
I bought them from wiseco.
I bought them from wiseco.
Is there any fitment issues at all with the 4G64? I know the water pump issue and I'm just going to use the Outlander pump and modify it for the timing cover.
Is there anything else not stated? Any mounting issues? I understand the Evo engine mount works fine.
A buddy of mine said there's hood clearance issues because of the taller deck. This wasn't an issue in the DSMs, but this isn't a DSM. Anyone having their hood slightly touching the valve cover?
Is there anything else not stated? Any mounting issues? I understand the Evo engine mount works fine.
A buddy of mine said there's hood clearance issues because of the taller deck. This wasn't an issue in the DSMs, but this isn't a DSM. Anyone having their hood slightly touching the valve cover?
Is there any chance I have valve clearance issues? Block was decked and head was decked cause it was warped. This would be the only thing that makes sense in this instance. I have Kelford 272s. Car idled fine for 4 15 minute heat cycles and didn't have an issue till it went for a test drive.
How much was removed from the head and block?
Since it was decked, you should have used a thicker head gasket. I doubt you had valve clearance issues though since the pistons have valve relief cuts in them and you have to be around 12 degrees of timing for the pistons to touch the valves.
Maybe it was timed wrong so that the valves didnt hit until any slack in the belt was taken up by the tensioner and moved the timing enough for them to hit. Doesnt make alot of sense though.
Since it was decked, you should have used a thicker head gasket. I doubt you had valve clearance issues though since the pistons have valve relief cuts in them and you have to be around 12 degrees of timing for the pistons to touch the valves.
Maybe it was timed wrong so that the valves didnt hit until any slack in the belt was taken up by the tensioner and moved the timing enough for them to hit. Doesnt make alot of sense though.
I'm still waiting word which 4 valves it was. I didn't do the work so I'm not sure about the lifters. The car idled fine for an hour so I think the lifters were fine. The block was decked .008. Still waiting to hear back about how much was taken off the head.