Hey guys, Currently in the process of building my 93 Hatch with an LS B18B1 Swap.

Current Installed Mods;

B18B1 Block (1995):
-Stock Crank
-Skunk2 Alpha 900HP Rates Rods
-ARP Rod Bolts
-Wiseco Pistons 11:1
-ACL Race Bearings
-ACL Main Bearings

B18B1 Head (1997)
-Stock Cams
-Stock Cam Gears
-Golden Eagle Head Studs
-Supertech Springs and Retainers @77lb Seat Pressure
-Supertech Valve Seals
-Dished Stock Valves

Added;
- GSR Oil Pump
- GSR Oil Pickup
- GSR Water Pump
- Cometic Complete Gasket Set
-CNC Block Gaurd ( Rated for 500HP)

Lay Around Parts to be added;
- Precission 580CC Injectors with resistor box
- Full 3'' Exhaust system from Cat Back
- Short Ram Intake



I have a few Questions. I do know that with the High Compression i am running that me running a turbo on the build could mean catastrophic failure. But i have been contemplating it and boosting anyways. I have a Jackson Racing Supercharger Sitting in my room i have been contemplating Installing with my 15lb pulley. I know i would be safe to run the Supercharger because they like High compression. But at the same time i want to Daily the car and be boosted. I was wondering How feasible it would be to install a turbocharger instead of the supercharger and run 10lbs of boost on the turbo. Any Ideas on What else should be done and purchased to finish this beauty.

Thanks All

93HatchDreams

 

It really depends upon the turbo size (Until you decide that the amount of boost in PSI that you run is irrelevant). And in actuality, you'd be running a LOT hotter with that compression on a 15psi pulley to where unless you're running a serious intercooler kit like an LHT, regardless of the compression, you'll be busy keeping that supercharger from detonating the engine. (Remember, it takes additional power to make power with a supercharger, vs. a turbocharger.

Sell the JRSC in your room. If its a complete kit, there is a pretty high demand for it, especially for a B18B. With that in mind, go for the turbocharger. Stay on the smaller side (about 50-55lbs/min) and really enjoy the nice torqueband you'll get from that B18B1 engine. Everything in the engine from what's listed easily looks like it would be a very fun setup indeed: provided the right sized turbocharger for your purpose is used....

 

I Have no idea where to even begin to start for choosing the turbo. Im not even sure What size turbos i should look into. Im not to familiar with them. Should i go External or Internal Wastegate? Ball Bearing Turbo? Complete Actuator? What Compressor Trim? What Turbine Trim? Lots of questions i have no idea what to chose!! All i know is Boosting this with a turbo will get me some decent track times this year when the snow and salt is all gone.

 

Well, the question is 1) what kind of "track".. (Dragstrip, AutoX or Circuit), 2) what kind of use.. (Drag/Street, street warrior, circuit/street, etc)... 3) what kind of budget are you working with on the turbo.. (Better come up with a number and not a "not sure, just something that doesn't break the bank, but is quality" kind of explanation. 4) are you keeping A/C, P/S? what other builds look similar to what I want?.. that's what you need to start researching. No one can suggest anything for you because we aren't you.. we're not clarivoyant, so the more truthful and specific you are with yourself, the better your decisions will be, and you won't be replacing and reusing parts all the time.

You need to be honest with yourself, what you're thinking you want, and see other projects as to how to get it. If at all possible, ride / drive in a few other similar cars to get an idea. you'd be surprised how much fun 300-400whp can be without having to go crazy.

The best way to ask questions is to have done some investigating of your own, then group your questions together... when in doubt, read more.. Understand the principles and uses of the components before fully purchasing them. you know everything, but it'll put you in a better position to make a more informed decision.

 

Very good advice by a very knowledgable member!

 

Well, to answer your questions. What kind of platform am I going for? I want the car to be a daily driven/ street monster. My budget for a turbo I can honestly say I am in no idea to wen give a number but I want to say roughly 1500-3000$. I already have no power steering and no AC. I already do know with the power Goal I running for I will need to buy Hasports Axles so I don't keep snapping them. Around me I haven't met anyone who had a high conpressio turbo. Everyone around me up here has told me I'm insane for wanting to turbo a high compression LS build. Which is the main reason I'm begging for assistance in the field from others who have done or seen this done. I don't realistically have a budget set I'm just rolling with the punches as one would say. When I come up with te cash I buy the parts.. The car really to me has no limits but I would love to see this car pushing around 350-400Hp and still rip off the line.

 

You are running 11:1 compression on stock LS cams?? Why didnt you just put a vtec head on it? You would be making mountains more power.

 

I don't think you can use a gsr water pump with a ls head. The teeth count is different from ls to gsr

 

yea the gsr pump with an ls head throws the timing marks on the belt off IIRC

and 11:1 on a stock ls head is doing you no good, you either need a vtec head or a ported ls head with a good set of cams to make the kind of power 11:1 can make. you're basically choking the motor due to the lack of cylinder head flow. also, those springs and retainers are pointless on a stock head with stock valvetrain, as you won't be revving that combo to any rpm level where the added spring pressure is required

also, a JRSC without some sort of intercooling (lht unit, water/meth injection) at 15psi literally becomes a heat pump, not to mention that's right at the efficiency limit for an unmodified m62 (porting the s tube and case would help a bit but not a lot) and your IATs would be so high that running 15psi would actually hurt performance instead of helping it

a turbo setup would see more power, basically everywhere across the rpm range except for below 3,000rpm, where the JRSC would be making power almost off idle.

not to be negative but I really think you need to take a step back and evaluate what you want out of this build. 11:1 will make good power whether you go supercharger or turbo but there's more power to be had with a decently sized turbo kit. your statement about high compression and damaging the motor tells me you clearly don't understand knock threshold with todays fuels.

I suggest you read the FAQs, look at Muckmans high compression build thread, as well as Turbo-LSs high compression build thread and see the kind of numbers they are making then go from there

also everyone will agree that with compression like you're running, that a vtec head would be in your best interest. you'd still be making the same amount of torque but you'd see roughly a 150hp increase from the start... not to mention the aftermarket support is much stronger for vtec heads, especially in the cam area.

will you be running 93 or E85? 11:1 on a stock ls head will be very power limited on 93 octane vs what could be made with 93 on a vtec head... it all comes down to cylinder head efficiency and cam profiles.

 

I'm not trying to shut you down but high compression ls builds have been done before and everyone figured out the stock cams really limited the motor, second was that the head needed a decent port/polish job and optionally larger valves to really make the entire cocktail work, forced induction, higher compression, and aftermarket cams are best friends, the only limiting factor then is what the ls heads ports will flow and is really what limits every ls build.

there's no sense in reinventing the wheel when others before you have already done the legwork. I'm simply saying to look at what others have done with similar setups then decide from there

read the ls turbo setup thread and that will give you a good idea of what a well setup ls motor can do with a turbo setup
then there's the JRSC thread, I think there are a few ls based setups in there but they are few and far between (you'll have to read every page to find an ls setup) because the non-vtec JRSC kits were/are even harder to find then the vtec motor kits