I'm currently running a stock ls that's boosted and I have a built gsr waiting to get swapped out in the spring. I'd like to just use the same setup on the new motor but I'm worried it might not be very efficient. So I'll go ahead and get some feedback on it and know weather or not I need to replace anything before spring. I'm aiming for 400whp on pump gas. I know a ramhorn would be the way to go but I've been told the blox is capable of flowing 400. My real concern is with the turbo. It's rated by precision to be capable of 535 crank hp but since I'm shooting for 400 wheel hp won't I be pushing it pretty hard? I'm concerned that I'm going to have to be running really high boost to reach my goal. Someone told me I might be looking at like 25-28psi to reach it. Wouldn't using a turbo like ex. the sc61 be a safer idea. Less boost to reach the same goal means less cylinder pressure and a lot less stress on the motor. I'm not easy on things by any means. So if I do need to get a bigger turbo can you throw out some suggestions for me to look at in the $700 range. Thanks in advance for any help.

Motor setup
wiseco pistons '8.9.1' - scat rods - arp studs for rods,mains and head - felpro mls head gasket - oem timing belt,water pump,thermostat,oil pump - gsr head with brian crower dual springs and titanium retainers - oem valves with new guides and seals - older spec itr cams - blox intake manifold and stock tb. I have a str 68mm laying around but I wasn't sure about it.
head and block were surfaced just to make sure it was flat so that will bump up compression just a tad.

Turbo setup
precision sc34 t3 57 trim .63ar rear housing to4e compressor cover .60ar 3" inlet 2" outlet
blox cast manifold
tial 38mm wg
precision 1000cc injectors
3" dp and exhaust 'no cat'
2.5" ic pipe
cx racing intercooler core size is 21x10x3 and overall is 27x10x3 2.5' in/out
walbro 255 pump

 

Bigger turbo to safely do it.

 

Any suggestions on what one to go with? I can probably sell off my current turbo for around $400 since it has low miles on it. So I'd like to stay in the $700 range if at all possible. Thanks,Adam

 

What about a blowzilla
compressor: GT40 .70 a/r 61mm inducer
flow: 65 lbs/min 832cfm
turbine: T3 .63a/r housing
stg3 turbine wheel

Which sc-61 would be my best choice

 

Anyone

 

Blowzilla is wayyyy overkill for your goal of 400hp...

i would recommend a GT3076r
or a Precisin 5857 or SC61.

but since you have a built motor coming...i would go with a Precision 6262, .82AR. it gives you more room to play with when you want to up the boost.
it's what i am currently running on my Ls/vtec setup.

and maybe a Meth/Water injection kit! they work great!!...

Ramhorn is a Must..

 

Scratch the blowzilla then.
So the PT SC-6152E would be a good choice?
6262 is out of my $700 range. i don't want to run meth/h20 inj.
I'm not spending upwards of $600 on a ramhorn when I know the blox can flow 400whp and that's all I want.

 

your bigger issue is that 8.6:1 compression. ouch

 

Yeah it wasn't my first choice but I got a great deal on the block.
The wiseco site says 8:6:1-8:9:1 for the pistons I have.
After speaking to a rep he said I'm at 9:0:1-9:2:1

 

Throw some flat faced valves in the head and hopefully you can get in the 9:1 CR range. They on average raise compression .3-.5 points

 

thats what i was looking at

 

I don't intend to change my valves since the head was just rebuilt by the machine shop.
After speaking with a wiseco rep just now he explained where the difference in compression comes from. He said since my head and block were decked for flatness I'm probably looking at a 9:0:1 cp ratio and maybe even 9:2:1

 

a 6262 is 800 shipped.

if you have a log manifold it will not be very efficient, it'll create more heat in your motor... it just won't flow imo the kind of power you want...

i missed the Piston CR...wow dude!! if you don't want to spend the money flat valves then you are going to need to up your boost pressure more just to make the power you want...

 

I was looking at a different 6262 then cause it was over a grand.
I'm sticking with stock valves. I already have to much in the head.
I understand the manifold is a restriction. It's just like the inline pro manifold and I've been told it can flow 400whp. I don't have 1k to replace valves and a manifold. I'm stuck working with what I have except for the turbo and that's only if I can sell the one I have.
I'm at 9:0:1 cp ratio according to wiseco. Thought that was a pretty popular ratio?

 

journal billet 6262's are about 8-900 dollars depending on where you get them and will probably be a bit big for your goals.

Your best bet is to get rid of your cast setup, go equal length manifold, and vent your block.

The point of running a catch can setup is to relieve pressure and the stress it puts on your internals.

Manifolds with longer runners will also help eliminate backpressure as well.

Id say try not to focus too much on peak numbers, and talk to your tuner about where he or she thinks it will make the best power safely. Its the area under the curve that counts but im sure you already knew that

If you arent hitting the numbers you like after that, I would suggest upgrading turbos, maybe not to an SC61 or 6262, but more along the lines of 5557-5857 $800-900, and flow more lbs/min than the gt3071-76R, Billet is where its at!

 

Ditching the cast manifold is not an option for me. I've already invested what I planned on spending to build the motor. I need to purchase S300 and get a re tune and I've counted that into my budget already. Spending 500-600 on a new manifold is out of the question if I'm replacing the turbo. As for venting my motor that's already taken care of. I have the honda block fittings in the rear going to a catch can. I just have a goal in mind and I'd like to reach it. My friends stock gsr did 400 on an inline pro manifold "just like I have" and a garrett 60-1.

So what's my best choice here...
1.upgrade to a sc61
2.get a ramnhorn
I

 

Sc61 will get the job done. Y s300 is crome an option for you?

 

Just throwing my opinion in, take it or leave it, Ditch getting the Hondata S300. It would be a waste on a setup such as yours. Getting a dyno tune on crome pro gold or neptune will do the job nicely, and as well as a hondata if the tuner knows what hes doing. The S300 IMO is intended for HIGH horsepower builds, 500whp and up that can utilize the boost by gear on the track to keep the slicks from coming loose. On the street running boost by gear is near pointless, anything over 250whp will come loose in 1st and 2nd gear, and cutting the boost off in those cases defeats the purpose.

 

I have crome free now.

 

Opinions are wanted that's why I'm asking questions.
I'm tuned on crome free now so I'm sure he can tune with gold. Are the hickups out of the gold version? I know I've heard of free having glitches. I wasn't going to run bost by gear but have it setup up using ramped boost. Which is essentially the same thing.

 

Save 600 with hondata and buy a new mani lol

 

Ive run crome gold pro on every motor ive had tuned. My last LSV made 350whp bone stock on a 54 trim tuned on it. I like the program

 

Sounds good I'll look in to it more.
Anyone tell me what manifold this is? Cheap or decent

 

some of those welds look scary :l

 

Yeah I was thinking it was probably something cheap. It's hard to tell now a days.

I really wish I can just upgrade my turbo and be done. If I do the manifold I'll have to get a new downpipe and dumptube made.