Currently, I have a 98 Civic DX hatch with a 98+ spec JDM B18C swap.

Current mod list includes:
- Factory ITR header
- Blox test pipe
- Greddy 2.5 " exhaust
- Skunk2 70mm throttle body
- Matching sized intake tubing and filter
- RC 310cc injectors
- Walbro 255 fuel pump
- Chipped P28 tuned on Crome put down 197 WHP

That's my current setup, and the setup that I would want to go with ( LS / VTEC ) would be similar to the following:
- Same P73 head and internals from previous setup, with new valve seals
- B18A or B18B bottom end, bored to 81.25mm
- Factory LS crank, knifed / rebalanced
- ACL bearings
- Whether factory LS rods with ARP rod bolts, or probably Eagle rods
- Brand new 81.25mm P30 pistons with matching rings
- ARP head studs
- New OEM water pump/oil pump/timing belt kit
- PWJDM or Hondata intake manifold gasket
- Adjustable cam gears

I'm looking for some opinions on if it would be worth it for me to build an LS bottom end like stated above, over staying with the ITR bottom end.

Thanks in advance!

- DJ

 

Go with a built B20 bottom end if you decide that route. The added torque is nice. But I don't see why you would need anything more than the itr setup.

 

You don't think with the higher compression and slightly bigger bore LS bottom end, that I'd make any more power than I am with the ITR?

 

all motor b series is a waste you'll still be in the sub 220whp all said and done on both, there wont be any real difference all said and done especially for the money spent. keep your current set up.

 

B series is definitely not a waste. Some of the fastest Japanese time attack Hondas are still B series. I feel like the OP really shouldn't need a ask others this question though. If you have money to blow then by all means go all out.

 

I understand that all motor B series is a waste. I have an all motot built B with 12.5k money into it haha. I was just curious if I would make more power on the LS/VTEC setup than I would on the current ITR swap.

 

And Garage_Spec, I'm not gonna go all out. I just wanna go what my original post states. All I was wondering was if I'd make more on the LS / VTEC.

 

So....you put together a parts list and don't know what you'll be making? You also wondering if its better to stay with the ITR motor?

So technically you want to spend couple grand just to make a couple more hp than what your type r is making?

 

I put together a rough parts list to get some opinions on it. I didn't put it together to be questioned. If I thought that it would only make a couple more hp as you stated, then I wouldn't have posted about it. And if money was an option for me, then again, I wouldn't have posted.

 

Id go with a better header, bigger cams like sk2 tuner 2 cams and the ultra street manifold and retune it.

 

What compression ratio do you think this build will yield?

I'll make it simple

If you're looking to make 250hp NA, you're gonna have to do more than bump compression.

 

I've heard of this almost exact build yielding 11.7:1. A little better than the ITR factory 11.1:1.

 

And I'm not looking for 250 to the wheels lol. I never said that.

 

You sure as hell right about that, no goals to go off of.

 

Tony, I'm still not understanding why you're here. You're not helping out, you're not answering the questions, and quite frankly you're a little bit annoying. All I'm doing is looking for opinions, and you haven't had one yet.

 

Seeing as a bone stock k20a2 with only k-pro can do into the 220+ in terms of whp. Not in anyone's wildest dreams could you get that out of a stock jdm ITR on an s300, it's cheap that's why so many ppl like it. If you had built any high hp k-series set ups you'd know how amazing those engines are in terms of stock internals. Also go look at any of the cars in the all-motor shoot out at h-day etc you won't see any old b series in the top, it's dominated by k-series. FI there's still a fair b-series presence but if you've been to any of those big drag events the top runners are still K's. All motor b-series is a huge waste for such a little hp amount, no one who has experience with both engines argues that.

OP both those set up are going to be roughly the same power wise.. under 230whp keep what ever you have unless you're going to do some drastic change like 85x89 12.5:1/big lift cams and e85 but that involves much more than just filling the tank with e85. Or some basic turbo set up.

 

Thats what I'm getting at, he hasn't listed any power goals or what he is trying to accomplished. All the simple googling I've seen show's that the hp gain from just a simple bump in compression with the p30 pistons will almost be around what he is currently making RIGHT NOW with the type R. So spending that amt of money just to gain a little, doesn't make sense. Unless he starts really thinking about what he is trying to accomplished, rephrase his OP to have these details, the the build he has will only yield a slight increase in HP. Would be a waste of build time.

 

Sensibly speaking there isn't much point in doing anything other than a healthy B20V setup. Unless you are running in a hard core competition just stick with a decent powered B and focus on the rest of the car and your driving. Just blindly throwing a K swap in isn't the answer and unless you are willing to spend over 10k in the swap parts and motor setup then you wouldn't gain anything over your B. Yes the K is better... Noone denies that... but when you factor in budget and needs then that isn't always the answer. Personally I would take a really well sorted and built B over a budget K anyday.

 

Why not just modifiy the ITR engine?
your engine is pretty much stock!
your gonna build a pretty much stock LS/Vtec instead?
You gonna ad adjustable cam gears for stock cams?

 

You did not answer Tony. Tony asked essentially, what is your goal? What is the purpose of the car?

To that end, why the hell would you build essentially the same thing? Without a stated goal, I have nothing to add.

Waste of time.

 

Ok, ok. I don't really have a goal, but if I have to put a number on something, let's say that I'm aiming for 210-220 WHP. I know that's not much more than I'm making as it is right now, but it is only a daily driver, and the ITR bottom end that I have now needs the rings replaced anyways, so I figured I'd build something else while I can still drive the ITR around as-is.

And in response to whoever asked me why I'm getting adjustable cam gears - it's so that I can degree in my cams. Yes, they may be factory cams, but the LS bottom end isn't the factory block, and cams aren't perfectly degreed in from factory either.

 

Definitely agree on the b20 vtec. Seen and read of a couple good NA b20 vtecs that made good power.

 

EXACTLY WHAT i HAD IN MIND

This was another thing that puzzled me as well....

 

Start from the beginning and set a goal, do some searching what can be done to a b18b block to achieve that goal, look around for alternatives to achieve that goal. Its that simple, if sitting down and doing your own homework is too hard than its best you take it to a local tuner shop so they can handle it for you.

 

I don't know how you even manage to waste that much money into an all motor build unless you got custom cams and custom itbs