New engine build.

[Josh P]

Over the last few months I have been gathering parts for my performance build. I have bought a new 4.0L short block, 422 cam, and a M90 supercharger. I also got a complete sohc 4.0L off craigslist for $100. The plan is to take the rotating assembly out of the sohc block and put it into the ohv block. I will get a set of aftermarket 90tm heads. The flat top pistons will increase the compression ratio to just under 10:1. The heads will get larger valves and 1.8 roller rockers. I'm not sure on the exhaust, I will end up having to make something. I have a T56 transmission I am going to install in the van with this engine. This will be my build thread, I will post progress photos here.

 

[Icuff4cash]

Nice one, I wish I was more positive cash flow,I have big plans many ideas. I wish you the best. I'm counting the days for my welder. Last week Eastwood said it was shipping FedEx wed then Thur,fri, still no tracking number. There banging me $55 fedex from Las Vegas to Las Vegas. I can't pick it up. So I'm like a kid 1 day before Christmas.

 

[zenish]

are we sure the sohc engine won't fit in the aerostar?

 

[Icuff4cash]

By sohc engine are we talking about v8. Because I have seen on utube v8 rangers and there's v8 explorers. And for you young pups. I had a 1962 Ford falcon 100 van with a 140 ci straight six.and I put a 289 in it. Just by enlarging the dog house if the rwd van has a cross member that holds the motor mounts. I've taken off the mini dog house and looked under the van there's room for a 302. Just enlarge the opening if needed. But I might be easer going from the bottom.

 

[Josh P]

are we sure the sohc engine won't fit in the aerostar?

21 inches wide to the edge of the heads, same width as a 302. I scored a factory new sohc 4.0l long block with all the gaskets for 1k. It is going in the xr4ti. The cheap Craigslist engine was supposed to be a good runner but with 170k miles and all the accessories missing a junk yard won't sell with the engine tells me it has timing chain issues. It would be easier to stuff a 302 in than a sohc, my goal is to make everything fit without any body work.

 

[Josh P]

Today I started to strip the sohc block to get the parts I want off of it. Timing chain guides are broken and it has weak compression. The motor does not want to come apart easy, I will have to cut the timing chains cause the bolts won't come out of the sprocket on the cam and I can't get enough tension off the chain to get the cam out. I'll have it torn down tomorrow and I'll post some pictures.

 

[jd4242]

Flat tops and 90tm will not give you under 10:1 i dont know where you got that

90tm pistons are -17.5cc dished and 90tm heads are 60cc that combo gives you like 9:1 if you remove 17.5cc from the pistons and run flat tops your right at 11:1

sohc flat tops and 90tm heads 11:1...

sohc flats tops and 95tm heads give you basically 12:1......

90tm heads and 95tm pistons give you 8:1

95tm heads and 90tm pistons give you 10:1

1gen pistons ...2nd gen....sohc
-17.5cc. -23.3cc. 0.0cc
Heads 95tm. 90tm
48cc. 60cc
stroke
3.307
bore 3.948
felpro headgasket
.050 compressed is around .035 to .040

 

[Josh P]

Flat tops and 90tm will not give you under 10:1 i dont know where you got that

90tm pistons are -17.5cc dished and 90tm heads are 60cc that combo gives you like 9:1 if you remove 17.5cc from the pistons and run flat tops your right at 11:1

sohc flat tops and 90tm heads 11:1...

sohc flats tops and 95tm heads give you basically 12:1......

90tm heads and 95tm pistons give you 8:1

95tm heads and 90tm pistons give you 10:1

1gen pistons ...2nd gen....sohc
-17.5cc. -23.3cc. 0.0cc
Heads 95tm. 90tm
48cc. 60cc
stroke
3.307
bore 3.948
felpro headgasket
.050 compressed is around .035 to .040

Thx for the correction, with the 422 cam that gives a dcr of 8.43 with the flat tops and 90tm style heads.