L92 Longblock + LSA Supercharger - What Cam?

[RLJ676]

Originally Posted by no go nova

Why not port the stock blower while you have it off? Also if you run a good heat exchanger to keep the charge cool shouldn't that help with stopping knock? And a water/meth injection system that maybe engages at 8psi with a 5 gal tank system so you can run 93 no problem? Just get a good system. maybe pick up a used blower cam thats vvt or non vvt, with new springs and dont forget to do the trunnion upgrade while your at it.

I thought about both, but it's extra $$ for a return beyond what I need I think. Trying to get the most for the least, doesn't need to be the biggest power motor out there though.

I've been doing more reading, and it seems like the more reputable tuners on the L99's (simlar vvt/compression motor in Camaro w/ auto) don't want to go above 9 lbs of boost either, and get 510ish RWHP on stock motor. Looks like w/ stock cam that's best I'd see as well w/ any safety.

Putting all this together then, I'm thinking dropping the VVT for a BTR stage 3 with new springs, stock LSA boost of 9 lbs and a good tune should get me to 650 crank at least? Stock balancer is cheaper than the Texas speed over drive so that helps fund the better cam.

[DavidBoren]

Cool. It's good to have a game plan. Now stick to it and let us know how it turns out.

Save a couple pennies for an upgraded heat exchanger with a fan. Install the upgraded HX in place of the original, AND install the original lsa heat exchanger between the reservoir and the blower. You shouldn't need meth with two heat exchangers unless you are road racing it.

[RLJ676]

Originally Posted by DavidBoren

Cool. It's good to have a game plan. Now stick to it and let us know how it turns out.

Save a couple pennies for an upgraded heat exchanger with a fan. Install the upgraded HX in place of the original, AND install the original lsa heat exchanger between the reservoir and the blower. You shouldn't need meth with two heat exchangers unless you are road racing it.

Thanks for all the input!

I'm planning on the ZL1 heat exchanger as it's bigger than the V's and pump (as well as SC cover as it's worth some flow/power) in front of the radiator. If it isn't sufficient for my needs I'll upgrade down the road, but given it works for the ZL1 which is a car that's probably capable of pushing much harder than my 72 (ridetech fronts/ GW springs out rear and Z51 brakes) I think it'll be good for my use.

I keep blowing my budget away... but trying to hold back where I can. Started w/ 10k for wheels/suspension/brakes, but since have added a TKO, seats, CF parts, and now a blown LS motor

Long block gets in this week and I'm picking up blower base unit this weekend...so it's starting to come together. Now time to buy a real torque wrench and read up on the actual work, this is my first foray into anything beyond easy bolt on stuff.

Thinking I'll talk w/ Dave about tuning once it's in car, hoping he'll chime back in here on the latest plan and guesstimate what it'll do haha.

[Sparks67]

Originally Posted by mikels

Matt @ Sled Alley does exceptional work - reason you see Mark's cars there frequently. He also has a '67 Camaro we did a 418 SC engine for that made great power. And an old Caddie with an LSA in it we did.

Dave

The 67 Camaro that Dave is referring to is mine, but my LS418 with a LS9 is at 841 hp and 818 ft/lbs torque at 10.9 psi. We haven't tested at 15 psi, but you need to figure out your goals in your engine. I wanted long term reliabilty in my engine, so I have oil squirters in mine. Spend some time talking to Brian, and have him build you an engine for your goals. Just plan to spend the money!

Jeff

[RLJ676]

Originally Posted by Sparks67

The 67 Camaro that Dave is referring to is mine, but my LS418 with a LS9 is at 841 hp and 818 ft/lbs torque at 10.9 psi. We haven't tested at 15 psi, but you need to figure out your goals in your engine. I wanted long term reliabilty in my engine, so I have oil squirters in mine. Spend some time talking to Brian, and have him build you an engine for your goals. Just plan to spend the money!

Jeff

That's a dream build haha. I've been tossing around how much trouble I want to take on as I'm not sure how usable the power will be. I assume you have it mini-tubbed, do you have any electronics for traction control or is it just your foot?

I'm trying to determine if I even need the blower if I don't mini-tub and run big tires, otherwise it'll just be a tire eater. I've only had fast cars w/ all the modern TC to help put it down.

If I keep the LSA 1.9 blower (which is in my garage taunting me) I'm thinking again to save cash to go w/ the LS9 cam, as it will make more than I probably need. I want to do the engine build my self over the next few months and have Thomson tune it. Part of the fun for me is building it myself, well until I run into trouble. I have awesome luck... just spent 4 days doing ridetech front suspension and new brakes, was supposed to do rear suspension and brakes too. End result is front suspension sitting on tires (evidently the springs they sent are too soft) and no rear work done as I couldn't get c clips off axle due to sheared pinion pin retainer. 2 steps forward and 3 steps back.

[RLJ676]

So I made some decisions...

Ordered the BTR pd supercharger stage 3 kit (springs/tit retainers/rods), their VVT delete kit, ARP head bolts, CTS- V FEAD and water pump and a bunch of other stuff. So good bye VVT.

I'm going to get the tanks inc tank with their 400 lph pump, any other input on fuel system? Thinking siemens deka injectors, not sure if I'll need a new line or just adapaters for the existing.

For radiator I'm going w/ a Griffin, either the combo w/ fans built in or I'll ad 4th gen camaro fans to save $200, anyone have any reason not to do either?

[cwylie]

Sounds like you are running almost the same setup as me except I have 11.2 compression and forged pistons. I also set my fuel system up to run E85.

[RLJ676]

Originally Posted by cwylie

Sounds like you are running almost the same setup as me except I have 11.2 compression and forged pistons. I also set my fuel system up to run E85.

What kind of numbers do you make on E85, did you ever tune for 93 octane? I thought of going that route but figure whatever i can make on gas will be enough, there is E85 in MI but I'd also need to beef up the fuel system/injectors etc too.

[cwylie]

No numbers yet. Its running but I have not been on the dyno yet. Hopefully soon.

[RLJ676]

Originally Posted by cwylie

No numbers yet. Its running but I have not been on the dyno yet. Hopefully soon.

Cool. What cam did you go with? I'd figure it should be pretty stout on E85 w/ that compression.