Robby1870 Posted August 6, 2003 Report Share Posted August 6, 2003 Okay, heres what I need to know 1. The combustion chamber size on the 3100 and 3.1L (should be pretty close but isnt the 3100 intake valve a hair bigger?) 2. Approximate thickness of an installed stock head gasket 3. Valve sizes for the 3.1L and 3100 4. Will 3.1L rocker studs fit in 3100 rocker stud holes 5. The depth and diameter of the "dish" in 3.1L and 3100 pistons 6. Stock 3.1L cam specs, I know the lifts (I think), just need durations and lobe seperation I think thats it. Thanks for any help Robby Quote Link to comment Share on other sites More sharing options...
stlunatics2oo3 Posted August 6, 2003 Report Share Posted August 6, 2003 umm let me research this tomorrow lol Jeremy Quote Link to comment Share on other sites More sharing options...
Brian P Posted August 6, 2003 Report Share Posted August 6, 2003 off my head : 1- identical 3 Aluminum Cylinder Head, Part # 10048649 Production "Generation II" V6/60 transverse mounted engines have aluminum cylinder heads with splayed intake and exhaust valves. This canted valve design enhances cylinder breathing by unshrouding the valves at max lift. The high-velocity intake runners and heart-shaped combustion chambers promote swirl in the cylinders for efficient combustion. Spark plugs are centrally located in the chambers. These heads are machined for 1.72" intake and 1.42" exhaust valves. Aluminum Cylinder Head, Part # 10218168 These Gen III cylinder heads are used in late model V6/60 engines for improved performance. They feature an increase of .040" in intake valve diameter and a reshaped port for a flow improvement of 16.7% at 0.450" of valve lift. 4- yes 6- intake .394 lift, 276 duration exhaust .410 lift, 293 duration Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted August 6, 2003 Author Report Share Posted August 6, 2003 Thanks Brian!! Those lifts are with the stock 1.5 rocker ratio right? Now, I just need to find a used 3100 for like $100 Oh, it is possible to match up 3100 heads with the 3.1L lower intake with port matching, right? I's gots some ideas Robby Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted August 6, 2003 Report Share Posted August 6, 2003 I have a 3100 for sale. Quote Link to comment Share on other sites More sharing options...
Brian P Posted August 6, 2003 Report Share Posted August 6, 2003 Thanks Brian!! Those lifts are with the stock 1.5 rocker ratio right? Now, I just need to find a used 3100 for like $100 Oh, it is possible to match up 3100 heads with the 3.1L lower intake with port matching, right? I's gots some ideas Robby 1- yes 2- no, quite a bit different Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted August 6, 2003 Author Report Share Posted August 6, 2003 I have a 3100 for sale. How much?? Like I said, all I got is like $100 Oh, and what are the cc's for the combustion chamber on 3.1L/3100?? And another, can you use a 3.1L flat tappet cam with lifters in a 3100 block?? I know the cams are different and the 3100 has the cam pos. sensor the SFI system, but Im hoping a 3.1L cam will work in the 3100 block Robby Quote Link to comment Share on other sites More sharing options...
Brian P Posted August 7, 2003 Report Share Posted August 7, 2003 I have a 3100 for sale. How much?? Like I said, all I got is like $100 Oh, and what are the cc's for the combustion chamber on 3.1L/3100?? And another, can you use a 3.1L flat tappet cam with lifters in a 3100 block?? I know the cams are different and the 3100 has the cam pos. sensor the SFI system, but Im hoping a 3.1L cam will work in the 3100 block Robby The oiling is difft on the 3100 block, not to mention you cant use roller lifters on a flat tappet cam cause the cam material is too soft. I dont know if the oiling system is bad for the hydraulic lifters or not. But getting a regrind of the 3100 cam is pretty low priced Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted August 7, 2003 Author Report Share Posted August 7, 2003 Yeah, well, I was wanting to use a 3100 complete motor, but use 3.1L flat tappet cam and lifter, since I know there are flat tappet cams out there with huge lifts and durations. I was on 60dergreev6 reading about the roller cam regrinds, and the prices I saw were like $135, which isnt bad at all. About the same price I have seen for new perfromance flat tappet cams. So, I guess what Im going to try to do is use 3.1L block with cam and lifters and do the 3100 top end swap, except try and find the 97+ roller rockers and if I can the 2000??+ 1.6 roller rockers. Im going for high compression, HUGE cam, etc, etc, etc. Thats why I want to know the combustion chamber cc's so I know if I need to go with flat top pistons or maybe just ones with a really small dish. Im looking for like 11:1 so I can still run 93 octane. I guess now I need to decide what kind of cam (low torque or high HP) that I want or maybe a good combo of the two so its still streetable. Robby Quote Link to comment Share on other sites More sharing options...
Brian P Posted August 7, 2003 Report Share Posted August 7, 2003 we're taking this to AIM Quote Link to comment Share on other sites More sharing options...
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