Ledphoot Posted March 21, 2007 Share Posted March 21, 2007 Ok heres the deal. I'm not new to engines but I am new to newer technology. here's what I have.... Chevy 355ci non roller engine, flat top pistons ( about 10-1 compression), Vortec heads 64cc chamber 170cc intake flow volume with 1.94 1.50 valves, match ported only. I have a th350 trans with 2200-2400 stall. 1 5/8 full tube headers. Edelbrock RPM dual plane airgap intake, MSD hei distributor. Holley 750 dp and "red" fuel pump. 3200lb car. 4.10 gear 28' tire ( non Z ...have to sell the Z body 2 back surgeries and 350lbs cant climb in and out of it anymore.. I know Vortec heads have unusual needs/limitations. I have had the machine work done for up to 510-525 lift. I have read there is little benefit from increasing valve size or heavy porting, so I decided to match port and leave heads alone. Now I have to figure out a cam that will work well with the torque curve and keep pulling to 5000. The 2 cams I have come up with are these.. Lunati Voodoo I489/E504 I227/E233 on 110 lobe center Comp Cams Xtreme I487/E490 I230/E236 110 lobe center will this be enough cam/too much? Am I on the right track? I'm thinking the lift is peaked for the limited flow of the head design and the duration will give me good volume without killing the torque... any help is always appreciated!!!!!! Quote Link to comment Share on other sites More sharing options...
icewtr Posted March 21, 2007 Share Posted March 21, 2007 Ok heres the deal. I'm not new to engines but I am new to newer technology. here's what I have.... Chevy 355ci non roller engine, flat top pistons ( about 10-1 compression), Vortec heads 64cc chamber 170cc intake flow volume with 1.94 1.50 valves, match ported only. I have a th350 trans with 2200-2400 stall. 1 5/8 full tube headers. Edelbrock RPM dual plane airgap intake, MSD hei distributor. Holley 750 dp and "red" fuel pump. 3200lb car. 4.10 gear 28' tire ( non Z ...have to sell the Z body 2 back surgeries and 350lbs cant climb in and out of it anymore.. I know Vortec heads have unusual needs/limitations. I have had the machine work done for up to 510-525 lift. I have read there is little benefit from increasing valve size or heavy porting, so I decided to match port and leave heads alone. Now I have to figure out a cam that will work well with the torque curve and keep pulling to 5000. The 2 cams I have come up with are these.. Lunati Voodoo I489/E504 I227/E233 on 110 lobe center Comp Cams Xtreme I487/E490 I230/E236 110 lobe center will this be enough cam/too much? Am I on the right track? I'm thinking the lift is peaked for the limited flow of the head design and the duration will give me good volume without killing the torque... any help is always appreciated!!!!!! Look into Crane Cams Powermax cams ... .488/.509 advertised duration at 276/284 1600 - 5800 rpm or .509/.528 at 284/292 2000-6200 rpm they come in the gm Crate motors mine has the 2nd one shown sounds nice and great power Quote Link to comment Share on other sites More sharing options...
Ledphoot Posted March 21, 2007 Author Share Posted March 21, 2007 Thanks Ice... I'll add that to my list for comparison.. Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted March 21, 2007 Share Posted March 21, 2007 both my computer software and notes on similar engines show youll be looking for a cam like this, installed as suggested in the instructions on the cam card, at 4 degrees advanced http://www.crower.com/misc/cam_spec/cam_finder.php?part_num=00211&x=20&y=6 yes it will be a rough idle and give up some low rpm tq but THE Average POWER CURVE will be far better and youll pull noticably better mid and upper rpm power from the slightly restrictive heads Quote Link to comment Share on other sites More sharing options...
Ledphoot Posted March 21, 2007 Author Share Posted March 21, 2007 Thanks Grumpy, I definately trust your experience..! Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted March 21, 2007 Share Posted March 21, 2007 IF you really want to get the most out of that cam think about getting a 2800-3000 stall, yours will work at 2400rpm but youll pull deeper into the power band instantly with a slightly higher stall converter, a STOCK convertewr stall speed WON,T WORK with that cam BEFORE BUYing ANY CAM call and talk with the manufacturer, but be aware that most will be slightly conservative in suggestions as they know from experiance thats the smarter route 619-661-6477 crower Quote Link to comment Share on other sites More sharing options...
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