B18c4 b16a2 head


K

K1ryu

SL1cK
Joined
Aug 26, 2009
Messages
266
Hi

im in a process of doing a b18c4 block to my b16a head, just wondering will i require a remapp and will i notice any difference regarding torque and power over the b16a engine with this convertion. i am doing to do this becuase i have been offered the block which has done 60k miles for very cheap and i could do with doing some sort of project :D.

Thanks
 
i'd say yes in terms of a re-map. i'm sure you also lower the compression ratio when fitting a b16 head to a b18c4 block too
 
yeh thats true however the displacment increase which im better off which i have been advised :D
 
I'm not so sure about that; afaik the compression decreases big time. The B16 head does flow a bit better but the B16 cams arent bigger.
 
_JT said:
I'm not so sure about that; afaik the compression decreases big time. The B16 head does flow a bit better but the B16 cams arent bigger.
Click to expand...

there difference will be like .25 in compression.
 
just get a set of itr or ctr cams, springs and retainers.
 
hey thats cool im defo gona get a set of itr cams, spring and retainers :D.
 
Put the B16 pistons in too, then you'll compensate for the loss in compression :p Not sure what you need exactly.
 
_JT said:
I have reasearched it a bit. The compression will be lowered .4 according to some. The B16A and B18c4 head don't really significantly outflow eachother. The biggest difference is the intake manifold.

GSR vs. B16 Head Comparisons. - B20Vtec.Com...... B Series and Beyond

Only can't find info about the difference in cams.
Click to expand...


Your wrong a b16 head is much better flowing then a b18 head its more than just the intake manifold. Thats why type r's use a modified b16 head. And to help with the compression just a lil put a thin headgasket like a buddyclub or toda.
 
realjdm said:
Your wrong a b16 head is much better flowing then a b18 head its more than just the intake manifold. Thats why type r's use a modified b16 head. And to help with the compression just a lil put a thin headgasket like a buddyclub or toda.
Click to expand...
I think you haven't clicked my link? ;) GSR head vs B16A head flow:

b16vsgsrheadstock.jpg
 
wow loving the ideas coming in, is that a defante that i can add my b16 pistons or will i need to modify them ?, i can get hold an headgasket that will increase the compression that whill defantly help. but on the turbo side what will be the maximum psi i can go ? ive got my work bonus coming through in a months or 2 so what ever ideas please let me know :D, i want this build to be a machine lol.
 
If you're going to turbo, you don't need to put in other pistons compression wise. Maybe other pistons and rods to be able to take higher pressure ;) I'm not sure if the B16 pistons fit, but I thought I read something like that. What dóes fit are B18c pistons and rods ;)

But you have to decide first if you want to stay N/A or if you want to turbo that shite :p
 
im more favour for the N/A due to daily use of the car but turbo does sound awesome to me :D i go n/a for now then save up more cash and i will get a decent turbo kit :D
 
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Alright...to the best of my knowledge, you need different parts for those two setups. Turbo is fine for daily use, as long as you don't drive short distance with it. It's bad if you drive 10 minutes every day with a turbo, but if you drive it 30 minutes at once every day then that's no problem.

The thing is, if you want N/A power you might want to go for ITR/EK9 cams/springs/retainers, ITR/EK9 pistons, rods and crank. But for a turbo application that will probably give too much compression and from what I've read, ITR cams have too much overlap. So you will have to make a choice before you decide to start modifying.

One option could be to get another intake manifold to get rid of the dual runner one, good exhaust header, have it remapped and drive it till you turbo it. I reckon that with a good exhaust system and intake mani and remap you should make 180hp :D That will be loads of fun. And when you decide to turbo it all, you won't need to open up your engine to change internals and sell the old ones. Only have to change header, maybe the rest of the exhaust.
 
Have you thought about doing a high compession build mate ? Ide make sure you 100% sure about which root you want to take before you take it. That was good info by the way JT. But i would say if you do want to turbo it then your best off with a set of low compression pistons and forged rods because you would'nt be able to go to mad on the boost with stock internals. What sort of power would you be happy with by the way ?
 
Thanks for that Jt that does sound like i can pick one route then having to have both options i will stick to the N/a setup and im looking for the set up to a have a decent torque to it so i may add high compression. you correct about needing to have forged rods and low compression pistons to make the most of the turbo so i will decide to go to the n/a route as i need the car for work and i know my garage will take about 2 weeks to do this. i prob start a turbo project on my eg next year hopefully :D. and the power im looking for will be about 180+bhp.

thanks
 
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