tercelrcr

Hey HT so I just got the head gasket on my 95 civic d16z6 replaced. The shop that did it had a ported head that the threw on my motor at no charge. I was excited when they told me this. However when I picked it up it seems like it has lack of power/bogging down at lower rpms. It feels like it had more power with my previous head. Any ideas what may be causing the bogging issue?

NotARaCist

iTrader: (1)

They just said it was "ported", they didn't tell you HOW it was ported? You never wondered why they'd give you a "free" upgrade? Different port setups flow differently, and will give different powerbands. If it's a wide open flow, it'll increase top end power at a loss of low end, and won't truly benefit without a cam and a tune. Sounds like you might have gotten screwed over by someone's high school machine shop project.

tercelrcr

The shop is one that a few friends of mine use. The owner said they just had the head sitting g around since the mainly do dohc swaps into civics and it came off a old motor. He said they would do it just to save down time on my car so they would only have the car a day instead of 3 days. Didn't tell me how it was ported or anything like that.

NotARaCist

iTrader: (1)

Yeah, if it was ported for top end, the bottom end will suffer.