BillZ260 Posted March 30, 2004 Share Posted March 30, 2004 For $650, complete long block, came out of a 98 chevy truck. Said it was 315 hp stock. No intake or dist. His Story... Guy's son was driving along and the motor lost pressure, pulled over asap, took it to chevy, they replaced the long block. Guy sold it to his dad and he pulls the pan, the sump had came apart from the oil pump. I can re-ring/bearing/gasket this dude for cheap! Buy an intake and maybe the cam. What do you guy's think, will the stock cam be too torquy for the Z? The heads are stock so they don't have the higher rate springs. Should I leave well enough alone and put this back together stock or what? Suggestions again. Machine shop said he won't charge me for any part inspection, this guy rocks, just for work completed. I will look at the motor tonight or tomorrow, get it and go from there. Will be only 450 more than I paid for the crap long block I am getting my money back for, I am happy again. Quote Link to comment Share on other sites More sharing options...
80LS1T Posted March 31, 2004 Share Posted March 31, 2004 I would put the better/stronger springs in the heads now just because its a lot easier to do it now that it will be once its in the car. It shouldnt cost too much to do it either. Plus that way you can switch to a bigger cam and not be worried about the small springs. Guy Quote Link to comment Share on other sites More sharing options...
wheelman Posted March 31, 2004 Share Posted March 31, 2004 Make sure it's a 5.7 liter (350CI). The 4.8, 5.3 and 6.0 liter Vortec engines used the same mounts as the LS1 and have multiple coils instead of a distributor. You might also want to change the oil pan to one that doesn't hang quite as low. Wheelman Quote Link to comment Share on other sites More sharing options...
BillZ260 Posted April 1, 2004 Author Share Posted April 1, 2004 It is a 5.7 L. Is there any worries with the crank or rods with this 98 block? A guy told me they were weak, dunno if he knows what he is talking about, I thought I would run it by yall. Going to pick up the motor tonight, guy went clubbin last night and wasn't home, LOL. Quote Link to comment Share on other sites More sharing options...
Pyro Posted April 1, 2004 Share Posted April 1, 2004 If I were you and IMHO, I would drop the engine in stock. There is sooooo much more to do in a V8 conversion than the engine. The engine is the simplest part. A cam swap is only a one day job. Plus if you use the old cam, you don't need to do the painfull cam break in procedure right at the time you are just trying to get the engine to run in a conversion project. So just inspect the parts and reuse all you can and get the conversion completed before hot-rodding the engine. There is a lot more to go (trans, drive shaft, exhaust, fuel system, gages, throttle linkage, trans linkage, clutches or cooling lines, mounts, radiators, fans, and wiring to name a few. Quote Link to comment Share on other sites More sharing options...
BillZ260 Posted April 2, 2004 Author Share Posted April 2, 2004 Well I bought the motor, it was hanging from a tree! WEIRD. So anyway the guy is going to deliver it today, he hadn't taken off the accessories or the intake yet. He turned it over with the flywheel and it had good compression and everything looked good. The rods are really FAT, and it is only a two bolt, are all newer blocks this way? PYRO, I am going to go mostly stock, will do the cam change now since I am going to go thru the motor anyway. It lost oil pressure and I don't want to risk spinning a bearing after I take it around the block once Getting excited, this think will hopefully be running by Septemer which is the Texas/Oklahoma track day at hallet race track here in OK. Hopefully there will be LOTS of HYBRIDers at this event as I would love to meet some new Z freaks. Most of the guys here are into Stock, which is fine but they show no love for the V8. Anyway, will keep you all posted on this small block build. Grumpy any cam suggestions for this 350 Vortec? Will be using a performer intake, 750 edlebroc carb, T5 all in a 260 z with subframe connectors. I will match the springs to the cam but other than that it will be stock. Oh yeah, it did come with the stock exhaust manifolds from the 98 chevy truck, will those work by anychance??? Thanks! Quote Link to comment Share on other sites More sharing options...
Pyro Posted April 2, 2004 Share Posted April 2, 2004 I see...... There is nothing wrong with a two bolt block. Mine is a two bolt and my V8 Z is running 10's. I think the performer rpm intake would be better and I don't like edelbrock carbs. I threw two in the trash a few years ago. The Holley 3310 (750 vacuum secondary) carb is much better than the edelbrock. Unless the edelbrock carb you are talking about is the edelbrock Q-jet series. The edelbrock performer series suck because they are made of the wrong material (aluminum) which cause them to heat soak (gas boilers) and the accelerator pump system sticks after a few months (bad design). That is why I threw them away, vapor locking and sticky throttle. You should match the engine compression to the cam you what to use. Here are some general guidelines: 8:1 to 9:1 use 190 to 210 degree cam (at 0.050" lift) 9:1 to 10:1 use 210 to 224 degree cam 10:1 to 11:1 use 224 to 242 degree cam 11:1 to 12:1 use 242 to 260 degree cam You should be able to change out pistons and/or use a thinner head gasket to get the compression you need since you are going to rebuild the engine. I would use the hooker block hugger headers. They work much better than stock manifolds. However, block huggers don't work as well as full length headers. But, block huggers install very easily in a V8 Z. Use the hookers (pn 2100) because they use 3/8" thick flanges. Quote Link to comment Share on other sites More sharing options...
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