109mcnh

I want to buy a GSR T/B for my 98 civic ex. Will the 95 GSR T/B work on my OBD2 civic? Thanks.
Its still the stock d16y8.

ej1love

common knowledge that b series tb work on y8 im, but u have to dremel it out to match up.otherwise its useless. also use the b tb gasket and cut it to fit. i think stock is like 55, 56mm. dont go over 60mm

shailoche

You will also need to port-match the throttlebody to the intake. Getting the bigger throttlebody on is only half the problem. If you haven't matched the throttlebody diameter to the intake manifold diameter having a bigger throttlebody will do nothing for you.

So, before you mount the throttlebody use that Dremel to cut out the intake to match.

The easiest way to match the throttlbody diameter is to use the B-series gasket:
1. place the gasket on your intake
2. use a Sharpie to outline the INNER portion of the gasket onto the intake
3. use a cutting wheel or file to cut back the intake to the gasket lining mark
4. use a buffing wheel to smooth out the cutting to smooth out airflow
5. clean the surface and interior of the manifold to make sure it is free of metal flakes
6. mount the new throttlebody with your newly "machined" intake
7. Enjoy!

rudebwoy

iTrader: (1)

you will also need to swap throttle rotor.

iliv2xlr8

With a stock D16, you will see next to no gain with this mod....

109mcnh

Thanks everybody for the info.

mattliston

you will only see benefits from high compression or boost, after port matching it. if you dont port match the manifold, you will hurt youer performance because you are causing reflection and more turbulence then neeeded

ej1love

not really, u will see better throttle response...

ej1love

not really, you will see better throttle response and why wouldnt u port match it anyway...

109mcnh

The other concern I had was, if the sensors on the 95 GSR T/B would work with my 98 OBD2 civic.

109mcnh

I did read that about the throttle response on faq, thats where I got the idea of the upgrade. Im also going to do the bolt on's intake, header, and a cat back exhaust.
I saw one for sale locally, I thaught it would be a good idea while I was at it, but I dont want to buy it and find out something doesnt match up.

boost and bass

if your motor is stock like people have said its shouldn't be your main consern for power with boost or high comp. etc. the stock one is way to restrictive, if you atleast got I/H/E then it will your motor flow better a bit, btw you dont need a gsr any B-series except type R is all 60mm, also i could be mistaken but i think the first gen sir was 59mm, and as for connectors you have the map and tps they will both work waterlines should line up if not then just get longer hose, iv heard of needing to switch the throttle cable or the throttle wheel otherwise you wont have WOT, but on my car with my stock cable it works.

ej1love

changin the tb has nothing to do with header and exhaust. pick any1 u want... for the intake arm maybe just get a 2.5in sri tube and use stock box and get a k+N filter, this is how i used it. but i didnt use a b series tb just the y8 im. i dont think the bigger tb is really worth it, unless u boost...

and for some more info tb sizes
b18c1-60
b18c5-62
b18a-58
b18b-60
b16a SiR-58
b16a Sir2 / b16a2 / b16a3-60
b20b/z-60
f20c-62
d15b7-56
d16a6-55
d16y7-56
d16y8-56
d16z6-56
ZC-55
d16a1-55
d16a8-55

shailoche

The key here is that the only way to see really impressive gains with this modification is to turbocharge the car. The larger throttlebody and port-matched intake manifold will allow significantly more air into the engine under boost conditions. And since more air with more fuel equals more power, the bigger throttlebody will make your right foot very happy.

MHDesigns

Unfortunately its a y8 as well. I guess i'll tell you what everyone should have already been telling you...save for a swap.. I/H/E aint got **** on a basic b series. It will cost just as much as all that stuff too. The y8 is a garbage motor IMO

109mcnh

Thanks for the advice and tips everybody , this is good stuff to know.
From what ive seen, the Y8 has good potential. I think Ill keep it.

mattliston

be sure to seriously look into having your oil pump ported a bit. or switch to a Z6 block (keeping your head) the oil system is better then the Y8. honda ****ed up in designing the oil system of the Y8