Please dont flame. I just need one final confirmation on this thing. I am gonna buy a GSR shortblock and sell my Jdm b16 shortblock. I am gonna keep my b16a sir2 pistons and put them in the b18c1 shortblock so I can raise the CR, but I am also going to keep my GSR pistons so I can swap them back in when I descide to go turbo so I can lower my CR again. Will I have to do anything to my b16 pistons to make them fit in a GSR block?

From my research I've gathered that I will need GSR head bolts/studs and a GSR timing belt. Although I am not positive about this, I think I will be able to reuse my DC Sports 4-2-1 header and my stock intake manifold which are both from my b16a. Will these two items bolt on easily or will I have to modify anything?

I will be replacing the intake manifold later on when I install my turbo (which wont be for a while), so I am wondering if I should buy one for a b18c1 or a b16a? (I am getting a skunk2 IM, not a ITR or a JG Edel so plz dont suggest them, thanks).

How will my stock Jdm b16a sir2 ECU handle the swap? I dont know much about ECUs and I dont even know if it will be able to run on the stock ECU before I upgrade the engine management. Any ideas would be helpful.

I will not be upgrading anything else on this engine.. no cams, no aftermarket pistons, etc.. I am really doing this so that when I decide to go turbo, I have a better platform to work of off. Please let me know if you think this is a good idea and if I will see enough gains to justify the cost?

Also, just outta curiousity.. could I install this without taking my entire swap outta the car? Will I need a lift? TIA


[Modified by TempBS, 10:21 PM 2/27/2003]

 

The intake manifold will bolt on fine (since you're keeping the head that it came off of) but the header will almost certainly be too short "height-wise" to clear the oil pan, because the B18C's block is taller than the B16A's.

Again, B16A head Use an IM for an ITR/B16, a B18C1 manifold won't bolt-on.

Since you're using the entire stock B16A head, there shouldn't be a terrible problem with the stock B16A ECU, even with the increased displacement and compression. You would probably want some sort of fuel/VTEC controller and some minimal dyno time to get the entire setup roughly dialed-in though.

 

Thanks for the help. I'll probably end up selling my dc sports then. This will also mean that when I buy my turbo kit, I'll need to get a GSR turbo mani too Im assuming.. if anyone knows about these questions, I'd really appreciate the help still.

Will I have to do anything to my b16 pistons to make them fit in a GSR block?

I will not be upgrading anything else on this engine.. no cams, no aftermarket pistons, etc.. I am really doing this so that when I decide to go turbo, I have a better platform to work of off. Please let me know if you think this is a good idea and if I will see enough gains to justify the cost?

Also, just outta curiousity.. could I install this without taking my entire swap outta the car? Will I need a lift? TIA

 

I think it probably will be worth it for the money. If you do the comp calculations on C-Speed.. and throw in the jdm b16a pistons your CR will be 11.65 according to my figures. The USDM b18c5 is only 10.6.. thats quite a difference. To run that high a CR though, wouldnt you have to build up the bottom end to handle it? Someone else might be able to help you there.

 

 

Since your header is a 4-2-1 you may be able to use it. I had a ApexI GT header for a b16 on my car with the GSR block and it cleared, barely. But it cleared. 4-1 headers are a different story.

 

11.65 CR? That's really high. You would really have to extensively modify the bottom end(pistons,rods,etc.) and the head(retainers,springs,etc.) You would want to do something like that only if you plan on going N/A, but since you want some boost you should leave the bottom end the way it is (use the stock internals) and just modify the head, you'll have good power out of that without spending a lot until you decide to get the turbo.

 

It turned out to be 11.3 CR. Is that still too high? I was told that if I just swap in a stock GSR bottom end I won't be seeing any gains in power at all b/c the CR would be like 9.8 or something. Would I see torque gains at least?

 

11.6 compression should be just fine as long as you got some good gas and tune it. You dont have to do anything to the head for the high compression unless your doing cams too and you shouldnt have to do anything to the block either unless your gonna be changing your rev limit which it dont sound like your gonna cause your gonna be using the si ecu. HTH