Ok I have been contemplating this crap for far to long so I want some opinions...

I have a broke down gsr motor which would be perfect for a itr rebuild, now with that said it would only cost me around 1500 bucks to do so...

I could also take that motor and fully build it for boost applications later on down the road... Which also worries me because I dont know much at all when it comes to fully built motors and how well they hold up to throwing boost at them

Or I could drop 4-4500 dollars on a authentic jdm b18c5 motor with lsd yada yada yada...

Now I want yalls opinions on which route to go?? I really dont care about the money because quite frankly ill be saving for a lil bit so I have time I just wanna no which route to go, or where you think would be a safer route, as in reliability and a all around fun car to drive??

 

What's wrong w/ the gsr? Build it and run 10:1 compression. Still plenty of umph until you can boost it and much safer when you do boost it. Don't spend the money on an itr unless you're gonna stay non-boosted.

 

well if you dont care about money then you should do the c5. it will be more reliable and you wont have to worry about your car running well. but if you dont wanna spend that much then the gsr build will still be a good option but you may run into some problems so basically it comes down to how much money and time you have to spend.

 

GSR with boost

 

the gsr was ****ed when I bought my hatch... from the looks of it a bad valve...

 

I would rebuild the GSR is you already have it. Just built it right the first time so you won't wish you put in higher compression pistons, or bigger cams later. The ITR has a mildly ported head and intake manifold from the factory, but you can buy a Skunk2 which has also been ported, and as for the head you can still make good power without having to port the head. BUT while the head is off you might as well get it done, OR do some research and find out how to do it yourself the right way.

 

well say I wanna boost the car down the road a year or two down the road is that possible?? Or should I just rebuild it to ITR specs and have a poor mans type r motor??

 

Hmmm..... I thought the Type-R head was more like the B16 which flows quite a bit better than the GSR in an non-boosted application. If you want out and out realiability, spend the money to have a really good company rebuild the GSR if the motors not trashed. Then you have a brand new motor w/ no miles except the ones you put on them. If the head is still good, maybe you could swap somone for a b16 head and build a "poormans Type-R".

 

A Type-R head essentially is a B16A head except is ported from the factory, has dual valvesprings, and bigger cams. It has more flow potential than a GSR head, but the GSR head has smaller combustion chambers making higher compression ratios with OEM pistons easier to achieve. The GSR head can flow very well too if ported properly. It's a very capable motor and I would build it to make more power than a stock ITR engine.

 

Why do people think this???? Both heads flow well, with only the slightest difference in powerband. One makes a touch more through most of the rpm range, the other a touch more at high rpm only....you'd probably hardly notice it!!!

 

so what do you all think?? Build the motor for a boost application? Or should I stay all motor and just rebuild it the gsr to a itr?

 

keep your engine!
Get some high comp pistons, even B16 ones will do, giving even higher compression, and some good cams and boom, you have the same or more power than an ITR if going NA

 

Rebuild GSR for $1500. Take that outta the $4K you were willing to drop on a B18C5 and use the difference on go-fast goodies. You can build a very capable, reliable and potent GSR motor with that kind of money!! (Just my 2 cents)

 

Yeah even stock block GSRs can make over 200whp. So think about one with 11.5:1+ compression and big cams.

 

Well... yes, and no. The B16 head does flow better than the GSR head, but the GSR head has slightly higher compression due to smaller domes, so it balances out.

So, the better head of the two is really a GSR head, because you can P&P a GSR, but you can't add material to the B16 domes. With a P&P, a GSR should flow comparably as good as a B16, and have higher compression. Which makes it as good or better both ways.

EDIT: Just looked, and I was apparently waaaay off on the endyn head, so removed that portion of the post.

OP: Rebuild the GSR. All things considered, there is little (if any) more potential in a B18C5 than in a GSR, and what little there might be is negated by the outrageous prices people want for them.

I'm not saying that the B18C5 is a bad motor or anything... Obviously it's higher HP stock than a GSR. I'm just saying that the GSR is better bang for the buck in most circumstances.

 

The ITR head is as it has been explained. A mildly ported B16 head with slightly hopped up valvetrain.

A head can have material added to it. It's called welding. I've seen heads with material added to increase compression. Look on Endyne's site.

 

rebuild!