Hey guys I need some advice. I'm building an LQ4 with an LSA supercharger. I need help deciding in what areas to spend my money on, and which heads/cam to buy. I've done a few searches and found out some useful info in other areas but I'm still undecided. This is a budget build so I don't want it getting out of hand. What I have right now is a bone stock Lq4 engine with 140,000kms on it, and a ZL1 supercharger less injectors, throttle body and fuel rails. I also have a lingenfelter 2.55" pulley. I'm shopping around for deals as I said this is a budget build, and I've found a few different choices.

Choice 1: complete L92 heads, low mileage, 750$
Choice 2 fully ported LSA heads with PAC springs and titanium retainers, 2500$

I'm probably going to reuse my stock crank, as it seems to be in good shape, throw some new bearings in it to freshen it up. Here's my dilemma. Do I go for the LSA heads and spend a good portion of my budget on those or should I go for L92's and maybe some porting and have some money to put elsewhere?

My goal is to get to around 7-750hp at the crank. I've heard the lingenfelter 10" lower pulley will put me up to around 15psi on stock manifolds but I have to run long tubes as this engine is going into a third gen fbody Camaro and its my only option.

I guess once I decide on heads, then I need to decide on which cam to go with. Are guys having much success with using ZR1 cams? Or should I be looking aftermarket like Texas speed or lingenfelter ?

I've also found a few sets of stock LSA injectors, would they be sufficient for 7-750hp or should I be looking for an aftermarket set of those as well?

Thanks in advance for any help!

 

I wouldn't do ported heads unless I'm looking for the very last bite of power from that blower. I think putting the money into a really good heat exchanger and a big *** reservoir that can hold a lot of ice would be a better investment.

 

That's what I'm thinking as well. I've never used L92 heads before tho, so do you think they will get me to my goals to around 7-750hp? I'm gonna email Brian tooley and get a positive displacement cam and if I choose L92's I'll probably get a set of springs and stuff as well.

 

Yeah they should be able to easily. Vengeance Racing (who is also a sponsor) seems to routinely make 630-650hp at the tires without porting the heads, and the L92 heads flow more air than the stock LSA's.

 

If it's going to be a weekend cruiser would it still be recommended to get the best heat exchanger and ice reservoir?

 

I would recommend it, but I wouldn't say it's necessary.

 

Stock injectors wont be enough ive done my research on this too since I will be doing the swap soon as I get my last parts to complete the swap

 

Use the l92 heads and ls9 cam with some 80# injectors. Keep it simple, get it running, and then decide if you need or want more from it.