Cam for LSA supercharger

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Nov 12, 2014 | 01:49 PM

cwylie

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Cam for LSA supercharger

I have a 6L Iron block with forged pistons, stock rods and pistons. Stock LS3 heads. The in the motor currently is 235/244 .621/612 112+2 cam. Would this cam even run worth a crap with a supercharger on it?

Nov 12, 2014 | 03:44 PM

Guard dog

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That's a LOT of cam for a 6.0 with an LSA blower. It should pull well past 7000rpm with that duration and overlap and be a little soft off idle. Do you really want that? Is the car heavy? What pullies on the blower? What rpm range do you want? What trans & converter? I guess there's not enough info to answer the question but it's more cam than I'd use on first impression.

Nov 12, 2014 | 05:20 PM

cwylie

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Its going in a street driven 69 Camaro so 3200 lbs or so. T56 trans and 3.80 rear gears.

Nov 12, 2014 | 09:23 PM

Dynospeed

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I would run a different camshaft. My ctsv is on the dyno right now making just over 700whp thru a 6l90 with a 226/242 .610/.600 121. These blowers don't need a whole lot of camshaft.

Nov 17, 2014 | 09:17 AM

cwylie

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So I am learning/finalizing this setup. Im going to be running Two walbro E85 450 pump so I should have more than enough fuel for E85. The compression on my motor is a little high than I though, best I can tell is a little over 11:1 so E85 is probably going to be my only option to be honest. I plan to run stock pulleys for the time being maybe a little over sized on the crank if I can find a good deal on one. I will probably port the snout and run a 102mm throttle body. Im thinking the deatschworx 950CC injectors should do it. Im running a Holley HP EFI ECU.

I dont mind it being a little soft off idle. This car is going to be lighter than a CTS-V by quite a bit and I dont want it to just blow the tires off just off idle. I dont mind the power being higher up in the rpm range. With that being said is there a better option for a cam? I do want something that has a pretty aggressive idle. Also I have forged pistons but it is still running stock rods and bolts. Should I go ahead and upgrade the rod bolts to ARP if I pull the engine back out? If I can upgrade the rods Im guessing it would be a good idea with rather high compression and S/C.

Sorry for all the stupid questions. Im new to the forced induction thing.

Nov 17, 2014 | 01:50 PM

SLOW SEDAN

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I ran a 235/243 115 with a TVS blower on 13lbs and it was enough to yank a 4,200lb car into the mid 10's with a 1.5 60'. It picked up a ton over the small cam I was using before it and left a lot harder.

I recently used some Brian Tooley cams in TVS blower builds, the Stage II: 227/242 .614"/.592" 122+6 and the Stage III: 231/248 .617"/.595" 120+5. Both worked well, Stage II in a stock converter auto, and Stage III in a M6 car.