I'm talking about a stock internals B17a....is it a good motor for boost (maybe better than a B16 because of the B17's lower compression)?? THANX!

 

from what i hear a b17 is the worst of both worlds. it has a bad r/s ratio.

 

i heard it was good for boosting because of the already stock low compression.

the r/s ratio isn't bad. it is 1.64 which is better than b18's but worse than b16's, so i don't see how it could be bad. a b16 has 1.75 or something so it's not that different. so i think it would be a good boost platform.

 

Bad Bad Bad idea! I had an original gsr with the B17A engine it and threw a rod around 130,000 miles. The connection rods don't withstand a lot of force. The cranks however are great. If you are going to boost on them, change the rods/pistons and upgrade the valvetrain. At that point, you could get a B16 block and boost on that instead.

 

So B17=no boost or BOOST AT YOUR OWN RISK!!

THANX for all the info!!

 

umm not to be a pain but where do b17a's come from? never heard of them before.

 

92-93 integra GSRs

 

It's has the power of the B16A with the torque of a B18.....the happy median. I've very pleased with my B17A1 swap.

 

i was wondering why i didnt see many boosted b17's...

and now i know why r/s ratio can be a good or bad thing for boost (didnt realize it before)

so if it has a shitty r/s ratio at higher rpms, then the rods usually arent as strong as the same design with a lower r/s ratio correct?

 

i can't imagine it being a problem to run a low boost turbo setup on a stock internal b17a if it's tuned right. i'm talking a max of 8lbs of boost. that's not so much force that the rods can't handle it. IMO should be fine with correct tuning.

i'm dropping a b17a in my wife's EF this summer, and we will boost it on stock internals right after that, so i'll let everyone know what happens.

 

hey if you could that would be awsome

 

yeah, plenty of people boost stock b18a/b's with great success, I dont see why a conservative turbo setup on a b17 would be worse. go for it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ricodemus &raquo;</TD></TR><TR><TD CLASS="quote">yeah, plenty of people boost stock b18a/b's with great success, I dont see why a conservative turbo setup on a b17 would be worse. go for it. </TD></TR></TABLE>
I agree. But if you want to run high boost, I would suggest upgrading the rods and using some good engine management like hondata. Tuning is the key to a long living, and good performing engine.