I just built my cammed LT1 camaro, its a fun car, but in the future, i'm looking for more. Im thinking T70 turbo and i can fabricate up the cold and hot sides. Im pretty knowledgeable about turbos, just finished my 412hp WRX build with an 18G. I don't want to go supercharger, i want to be different.

Supporting mods i'll need?
-front mount intercooler
-injectors
-tune
-better head gaskets
-modded headers and air intake system
-anything else???

Can my new LT1 support about 500hp or more? It is a new stock block, crank is reconditioned stock not turned, reconditioned rods with arp bolts, speed pro hypereutectic pistons (which will probably have to be replaced with forged), ported heads and intake, LT4 hotcam kit (will this cam behave good with boost?).

 

Best place to ask this question is the "Forced Induction" forum. I'll move the post there for you.

 

your shortblock will be fine once u replace the pistons with something forged and lower the compression

go 60# injectors

 

The LT4 hotcam looks like it might have alot of valve overlap. In which case, the stock LT1 cam might make more power (maybe use 1.6 rockers)

Stock LT1-------202@ .450/ 207 @ .450 (1.5RR)--- 117 LSA
LT4 Hot Cam --- 218@ .525/ 228 @ .525 (1.6RR)--- 112 LSA --- 1800-5800 RPM

 

if your goin to do a cam go ahead and get a custom ground fi can.

 

thanks for the input so far, looks like its gonna be a master power T70 with a .96ar. Do i need a new ecu like a megasquirt or can i tune the stopcker while using a FMU? what are you guys using for management?

 

you have a pm.

 

The hotcam should still have a little negative overlap because its so dang small. I'm running something very close to it and I think I am -3 or so.

Drop the compression. Headgaskets - I wouldn't be afraid to run the felpros at 500hp. I ran them for a good bit on my motor. Don't know if it got hot and then popped or if it popped and then got hot.

What are your goals? The t70 is good to right about 600 to the wheels - and a good 750ish tq if you want to run a crap ton of boost.

 

will the crank and arp bolted rods be ok at that power level or am i looking at a new shortblock? I would love to just swap out the pistons and go from there, maybe keep the hotcam since it is after all a small cam with a middle of the road 112LSA.

 

You should be fine with the stock crank/rods+ARP. That's the route I went years ago and it works. If I had to do a 'budget' build again I'd get forged Scat I-beam's with the larger bolts. You can find these at Summit/JEGS for something like ~$300 a set.

As far as the cam - I'd run the stocker over the hotcam. Just my opinion. You would also keep the rod tensile loading to a min. with a lower peak rpm.

You might want to consider ARP studs for the mains rather than bolts, if you haven't.

-Scott.

 

According to my calc, the neg overlap of the hotcam is -.5 and the stocker is ~-14, which i thought you wanted anywhere from 0 to -5 with a turbo setup and 0 to 5 with a SC. I just may swap out the pistons, arp main studs and keep everything else. Summit doesn't have any sets of a good blower piston, where and what would you guys recommend i go with for stock cc heads and the impala felpro gaskets. .030" over of course. I could really f'in kick myself for not going forged.

I went for a first drive today after a winter of being stored and got the turbo bug in my *** again

 

Put in forged pistons, arp main studs, gaskets.
Shoot for 9.5.1-9.1 compression.

SRP, mahle, TRW, are all cheaper but decent pistons.


Really try to budget for a better cam. It will make a big difference. Your also going to need a fuel pump.

 

Thx for the replies, i'm gonna go custom cam route too like u guys said, can i keep stock ported heads or will it be the bottleneck? I'm only looking for 600-700rwhp. I'm planning on the log manifold lt1boost setup with the TC76 .96A/R for my goals. How much boost will need to be run to achieve those goals too?

Oh and i'm gonna go with the OBDI conversion from madtuner, any bad results i shoiuld know about this? I'm gonna keep my OBDII ECU just incase i need to pass emissions b/c i'm moving to Florida in the next few years.

60# motos be ok for injectors? I run 72# on my WRX and the injector duty cycle never gets above 70% leaving plenty of headroom even at 21psi, the 60's just seam small for a V8 to me.

 

ported stock heads will work, i have some for sale if interested, and 60's will be ok. i put down 670 thru a th400 would have been 750+ with a 6 speed. with (heavily) ported stock heads, 60# injectors, log mani's at 14 psi.

 

what about the radiator angle, seems like a tight fit for the turbo to be right in front there, any mods required for the radiator to make the kit fit? I have had my heads ported already just wondered if i should've went with an LE1 or 2 head set but thats not really in the budget right now.