Ok i have a jspec b18c. 180 hp, 10:6:1 compression, LSD all that good stuff. I have basically every bolt on so now it's time to get inside of do something big. Is it worth it to put a ITR head on a jspec b18c. How much of a power gain should i expect. If you guys have any other options let me know what you think. I am just trying to get as much reliable power as i can. I'm trying to get into road racing and i'm a little into drag. But this is a daily driver so reliability is a must. I did a search but not really the answers i was looking for. What do you guys think.

 

skunk2 manifold for a gs-r would complement your motor along with a CTR/ITR camshafts.

 

sorry i didn't answer your question but the ITR head would cause you to lose compression due to the bigger size of the combustion chamber that is why I posted what I posted above.


[Modified by B_Cruz, 7:49 PM 10/13/2002]

 

what if i put a Mugen headgasket and some new pistons?

 

The $$$ won't be worth the power gains. How about you get a Skunk2 intake manifold, ITR/CTR cams and port and polish your Sir-G head? Don't be so hung up on the ITR head.
this way you won't have to tinker with your pistons.


[Modified by B_Cruz, 7:53 PM 10/13/2002]

 

A little bit of a port and you'll have a head that flows better than an ITR head..

But if you have the cash, ctr pistons and and ITR head would be fun.

 

any other options to make my car faster?

 

You got bolt ons yet?

 

comptech icebox/jg 2.5" header/2.5" cat/2.5" exhaust ... then get some ctr cams and gears and later on a jg manifold... fast enough...

 

no ****
ITR/CTR cam, JG or Skunk2 manifold, head port and polish it would fly.

 

What about if you turbo charge it???

Curious to know how it would run.

 

is there any difference between the jspec GSR head and the ITR head besides the better flow from the ITR and the better cams in the ITR. It seems like if i just port my head and put some nice cams that would be the best setup.

 

100 shot. Don`t let everyone tell you that you don`t get any "respect" w/ NOS. If they do, just beat them. Best $500 you`ll spend.

Ryan

 

one of the best ways you can go and be fast on the street/track..not that im promoting street racing

 

I have an ITR motor and I must say that the GS-R head is still a killer head to start with. I'd simply port and polish the P72 head and get some better cams as others have suggested.

If you've got the money while the head is off I'd drop the pan and pull the rods and drop some ITR pistons in too. With the P72 head it would be some nice CR and you'd still have O.E reliability.

I'm still curious to see what somoone could do with the stock GS-R manifold - it just promotes such good low and mid power that I'd be cautious to ditch it so quickly. Erick's racing uses a modded GS-R intake manifold on their 10 second all-motor Civic.



Plus with the Skunk2 manifold you'll need a different ECU program that kicks VTEC in at higher than 4500rpm - this will probably make you drop out of VTEC when shifting with the SiR-G tranny.

 

This link should give you some good info... But If I was you, I'd just go with OS PR3's or OS JDM ITR's with a mugen gasket... CTR/ITR cams. Im looking to come close to 11.6:1-11.7:1 range with OS PR3's and mugen gasket. I was going to go CTR pistons, But decided not to go that high with OEM cams. If I had Skunk2's or JUNIII's I would go that high.

But here's the link
http://www.hybridgarage.com/tech/headswap/index.html

 

Does anyone know about this setup with FI. Either NOS or Turbo?

 

I would think it would have to be good seeing that the ITR head will lower the compression i believe .2 points... So if you have USDM GSR block it should drop you down to around 9.8:1. and JDM block would drop down to 10.4:1 with ITR head.

 

port n polish` might as well go ITR pistons like others sed while yoor @ it

 

Just get a B16 head and buld it its almost the same head as the ITR head. ITR intake manifold CTR cams and dual valve springs. ITs the same and a lot cheaper. The Skunk 2 manifold costs more then the ITR manifold and they are the same but the ITR manifold will not fit the B18 head.

 

b18c5 bottom end with a ported/polished gsr head would be a better combo. you get the type R pistons and have higher compression than a stock R. with some cams and an intake manifold, you'd be seeing some nice HP out of that.

 

There's many different options and everybody has their personal preference. Do your homework on every part that;s been listed, check out the availability to yourself, and see how much you want to spend. This should help you choose which direction you want to go.

 

well here's what i'm thinking.

If I keep the head here's what would happen
Port n polish around 800
CTR and ITR cams around 600
Valve springs and retainers around 500
That's almost 2000

If i get a ITR head i can get it for around 1000
I would change the pistons and rods. 800
Hondata around 500
Almost 2500 What do you guys think?

 

yah but bottles r for babies then his motor blows but hey every 1 here has money to blow

 

Tp sum it all up y0... Its all about what you have the money to do and what you really wanna do..