Ricer no 7

So after the holidays I'm about to help my friend with a new build for his crx. We are about to start buying parts but I'm torn between to two different paths wither to build a NA car or a JRSC car.

What we need and are looking for out of the car:
This car is a DD and commutes around 35 miles a day
The purpose is to build a really fun daily driver
Need something reliable
Will be able to spend about 900 monthly

We will be using a

B18c1 long block

other parts have yet to be fully decided and will probably based on deals we find and direction we take

So fully build NA we prob have to sleeve and bore out cams etc or just pistons and rods and slap on a JRSC and we prob be close to our goal.

Opinions on going NA or JRSC

Ricer no 7

Didn't know which forum to post this in since its not really a track car but didn't want to post this in either forced induction or NA since it would be more bias

lemme know if you want to move it

dirty19

iTrader: (1)

Id take it back to the motor forum because thats where you'll get the best information.
Be careful you dont build a car that wont pass smog!
For a DD.
JR ... You cant go wrong.

Stinkycheezmonky

I'd start by reading through this thread: https://honda-tech.com/forums/forced-induction-16/%2A%2A%2A-official-jrsc-thread%2A%2A%2A-1214810/
which is basically the holy grail of all things Honda-JRSC. Start at the back and work your way forwards.

There are thousands of guys with generically built all-motor GSRs, that's nothing special, just search through the All Motor forum.

As dirty said, if its going to be a commuting daily driver you'll need to keep smog legality in mind. If a JRSC can fit that bill, I'd say do that. There is no legal way a built GSR motor will that I know of (based on what I know about CA smog laws).

*Moved to FI*

Ricer no 7

Thanks for the fast replies for moving this to FI

I've read through most of the JRSC thread

And currently have a built LSV

And smog is not to big of an issue

Just wanted some opinions on what people preferred for a fun DD that is reliable

I'll lay out a framework of what we were expecting to build to clarify either way so maybe you can choose which of these routes would be better for us or what you would change

All motor build would be something like this:

Short block:
B18c1 short sleeved and bored out to 83-84 mm
ls crank
eagle rods
acl race bearing
arp head studs
11.5:1 compression pistons
Head :
supertech valve springs and ti retainers
ported head
(unsure which cams)
cnc'd performer x intake manifold
68mm throttle body
short ram with velocity stack

knock off tri y or rmf narrow
hondata gasket
etc

For the JRSC route (pretty simple):

Essentially b18c1
with almost stock bore 10.5:1 compresion piston
eagle rods

JRSC with LHT aftercooler
and ported s tube

probably using hondata s300
and a gsr tranny with itr lsd for both setups

Thanks lemme know what you guys are thinking

Ricer no 7

Anything jrsc or all motor fans ?

Stinkycheezmonky

I personally would opt for the JRSC for a daily driver. Torque is more fun than revving the **** out of an all-motor car when you're just putzing around.

end005

This is going into a CRX? Honestly, is there room for a JRSC GSR swap in that engine bay? I had a EF Sedan with a stock GSR swap and that was a pretty tight fit. (And was one hell of a street machine paired with the JDM B16 YS1 cable tranny).

If you want to reach the 215-225 whp mark go with the JRSC. I've got a JRSC GSR making 217whp with 157 lb tq (was my dd and getting 30+ mpg). Here's my simple mod list:

JRSC - 6lbs (stock boost)
Hondata S100
Walbro fuel pump
440cc RC Injectors
DC Header
Apexi N1 Exhaust
JG Throttle Body
-King Motorsports Tuned

Its quite a simple mod list. I believe with the use of a header with the Bseries motors in a EF Chassis, you have to do something with your cross member, but if you match the setup with a Kamakazi header, its proven to gain slightly more whp. Port the s-tube for the s/c and that'll also help with airflow.

Keep in mind that the higher boost you go, the more heat issues you will run into. Even at 6lbs there is a lot of heat. You could fork up the extra $1k and get the LHT cooler though if you wish and shoot for more power and up the boost to 10-12 lbs of boost.

215-225whp in an NA format may be difficult and pricey to achieve; however the JRSC application the goals are easily achievable and reliable.

I hope this helps.

end005

If I did this build into a CRX/EF, I would run the cable B16 LSD YS1 transmission that I ran in my old EF sedan setup. **** would be fun!

(If you do decide to go the JRSC route, make sure you get a more aggresive clutch setup. Your stock clutch setup will worn out quick with the JRSC and you may not get the response you're looking for)

Ricer no 7

U think the b16 would be a little short for a DD ? JW yah we definately going with a nice new clutch and prob around 12lb exedy flywheel.

Yah there is a little work to make the JRSC fit but not to much.
(http://crxcommunity.com/viewtopic.php?f=4&t=43331)

We have kind of been leaning towards the JRSC with LHT mod and nice heat exchanger and ported s tube.

I think might be cheaper than a sleeving and building an aggressive all motor set up.

end005

It would be quite short, yes, if you can stand it. It never bothered me though. Light chassis, 215whp, short gears not fun?? That's plenty quick.

If you're goals are to just reach the 215 mark, the LHT isn't necessary because you'll be safe with the 'stock' boost. Yes, it'll eliminate the heat issue, but why spend the extra money if you can reach those goals with simple bolt-ons and get away with it?

You do understand the LHT mod is an extra $1k+??

Natural Aspirations

Just from experience, 215hp is a lot for a FWD civic/crx. If your friend has limited experience he may be better off going a year on a stock motor.

I autocross a jrsc charged car and my opinion it would be a better choice than cams and compression.

Best advise is K.I.S.S.

rat city rex

So my friend just finished his 1st all motor build, and I can say im totaly impressed with it. Now with what u guys plan on doing I would opt out for something like this over a full build or a jrsc. Now this guy knows his **** and has a 100% stock block, oil pan to valve cover, besides head studs, boosted 470ish whp gsr ina crx. I think he ran a 10.89 @130+mph, second time down the track b4 they kicked him off.....lol And hes been raping it for 20k miles. So now this build is his dd I belive.

Ricer no 7

(end005)The LHT is pricey but really nice mod lol we may up the boost later. We are most likely going to run on the stock jrsc for a while before the upgrade.

(natural aspirations) we might keep it stock for a year (as he is used to AWD turbos) but I doubt it my friend just graduated from UC Berkeley (mechanical engineer) and got a really good job. By next month should be debt free no credit card debt no student debt. So he will probably be tempted to spend around 900-1200 a month on the car.

(rat city rex) nice numbers but the compression may be a little high for california since we only get 91 octane tryin to stick to 11.5 ish compression. Nice simple build though.


Leaning towards b18c1 pistons and rods and slap a jrsc on it. Then later down the road LHT upgrade and ported s tube. Maybe nice heat exchanger

What you think?