b16 head on turbo gsr - Honda Forum / Acura Forum

96gsrvtech · 09-06-2002, 06:18 PM

will this be good for my car and will it bolt right up to everything besides the manifold? give me some extra info on this.

MatT3T4 · 09-06-2002, 07:40 PM

It's a great combo. It will raise your compression a little bit, and the B16A head has cleaner flow characteristics. If I were to ever turbocharge another B-series motor, it would be a B18C shortblock with a B16A head.

roby · 09-07-2002, 06:07 AM

matt, are ya sure it raises. im pretty sure it lowers comp by .2 on a gsr block. this is the setup i have on the new motor getting built,

2.0 gsr w/GE sleeves, eagle rods, 10:1 comp ross pistons, acl beearings
the head is a first gen jdm b16 w/ skunk2 springs and retainers and ferrera .5mm oversized valves.

from what ive learned by reading its lowered comp by .2 on gsr blocks so i needed to buy a cosmetic head gasket w / a.020 thickness

MatT3T4 · 09-07-2002, 07:33 AM

I am positive it raises the compression. It is very popular with NA guys, and is referred to as a Poorman's ITR motor. It doesn't raise it a whole lot, but it does bump the compression a bit. Possibly the reason that you were told to get the head gasket was because whoever is helping you build suggests that you lower your compression. Excuse my ignorance, but I don't know the conversion tables regarding head gaskets (I FUCKING SUCK SHIT AT MATH!), but I would assume you mean a 2mm head gasket. A 2mm head gasket on a Honda motor will lower compression. I have a feeling that you might have your information backwards. The B16A head will raise the compression, and the 2mm head gasket will lower it...I think that you have been told the opposite of that...?

Tell me if that makes any sense.

96gsrvtech · 09-07-2002, 07:56 AM

a ya'll, will the manifold of a b16 fit right onto my intercooler piping?

MatT3T4 · 09-07-2002, 08:05 AM

You may have to modify it a bit, or muscle it into place, lol...the B18C throttle body sits a bit lower than the B16A.

roby · 09-07-2002, 08:40 AM

the only advantage of a b16 head over the GSR head is that the b16 head allows more volume, and compression is .2 or .3 less than a GSR head. Due to the smaller combustion chamber of a GSR head.
_______

MatT3T4 · 09-07-2002, 08:57 AM

The B16A head absolutely raises the compression of the motor. If I were in your shoes, I would utilize the stock head gasket to take advantage of the bump in compression.

roby · 09-07-2002, 09:15 AM

i really dont know what it does anymore. everyone on ********** says it lower cr but you say it raises?....hmm im gonna be in for some surprises. i bought a thin gasket to raise comp so in essence im gonna have like 10:5~6 cr if ur theory that it raises cr is correct and 10:1 if the guys at ********** are correct.

MatT3T4 · 09-07-2002, 09:30 AM

A B16A head put onto a B18C block will raise the compression, I am absolutely positive. I would just stick with the stock head gasket though. Put simply...which motor has a larger displacement? The B18C. Which motor has a better, more thorough flowing head? The B16A. So how does it make sense that this combination would lower the compression? Afterall, compression is a BIG factor in power output...so if this lowered the compression, then the motor wouldn't make as much power. It would make less power than the stock B18C.

Dr Drew · 09-08-2002, 05:29 AM

http://www.c-speedracing.com/howto/c.../compcalc.html

Although I dont know how accurate it is.

skylinestylee · 09-09-2002, 12:47 PM

The B16 head is larger in volume, resulting in the better air flow. It lowers the compression. Larger volume = lower compression. End of discussion.

roby · 09-09-2002, 01:00 PM

cool.
i was just gonna let matt try the # on the calc...it really depends on what parts ya use. if u use si pistons u will definately surpass 10:1.

me and drew had a discussion about the head /block...actually he educated while i sat there and said "derrrr"

MatT3T4 · 09-09-2002, 03:04 PM

Ahh very well.

Roby, you sir, are the first person to ever strike me incorrect.

That's a useful calculator on c-speed. One question though, if you are building the motor, why are you going to use a thinner head gasket? Why not just get higher compression pistons?

roby · 09-09-2002, 03:10 PM

shit, i just got a compliment from matt..damn i feel awesome. you and tom at rev hard are cool ...tom said he'll get me a deal on a turbo...

anyhow, i woulda used higher comps but i never figured on switchn heads. i was just gonna use my gsr head but then i found a sweet deal on an b16 and it was too late to change the piston cr..they were already being cast.

otherwise i would have gone for 10:5 on a gsr head which would be close to stock gsr cr w/ si head. if i had never read ur posts about higher cr's making better, more efficient power on boost i wouldve just been like everyone else and go for some 9:5 slugs.