MustangGeeTee

from an old post on another site:

"There are late 98's that had a modification that eliminated the small wall obstructing the intake valve (prior to the PI heads) on the 99+ models and they are freakishly fast and surprise alot of people how they run.My buddy bought one, it was purchased in Jan.99 so it was one of the last 98's produced and it ran low 14's right off the lot."

is that true?

JC316

No. They got a slight bump in HP to 225 in 98, but they are still slow NPI's.

LilRoush

"Freakishly fast" is relative. They had more power, but nothing I'd define that way.

uberstang1

Far from freakishly fast.

Dubwhat

My 98 has an engine swap to a 02 P71..... It is freakishly fast. Lol

MustangGeeTee

i think hes talking about a supposed little know factory mod dont in LATE 98... seems you all are missing the point. im just asking if its true

swarthyfellow

Are you taking about the in the combustion chamber? I know what he is talking about.
I have heard something about that before... not saying its true... but I have hear about it.

motorman524

I had heard of them revising the B head on the Mark VIII's between 96-98. It was the small wall in the combustion chamber, just like what you're saying. Not sure if it's true on late 98 Mustangs, but it's absolutely true on the Mark VIII's, I've seen it. I wouldn't rule out the possibility, but I doubt it.