Back from the dyno after PI intake install....

98Black4.6 · Oct 31, 2005

Final numbers:
182.25 hp @4700
232.30 tq @4700

They shut down the run @4700 due to a huge amount of detonation, so I figure I have another 5-8 hp in there when I hit peak power at what, @5300 or so. This is with an auto, and 40 series flows, which may give me back ~2 hp if I take them off... So for anyone contemplating the PI intake swap, you can see the results of it from someone who has done it.

streetstang03 · Oct 31, 2005

now, just get the PI heads and some stage II cams!

tomustang · Oct 31, 2005

weird that you have an auto with 2.73's on a 98.

edbo · Nov 1, 2005

Had 2.73s on my '98 a while back. Best Mod for mine so far is the 3.73s, a wicked difference. Good luck in getting that PI manifold to kick in.

98blackmagic · Nov 1, 2005

Im not sure what I got form my PI intake, but my numbers now is 238hp and 278lb and that is with my auto too. All my mods are in my sig, mine was tuned and a custom Diablo chip burned I got about 18hp form the tune and chip, waiting for the final assembly on a built 4.6 with worked PI heads and comp 278xe cams now to be installed around christmas HO, HO, HO,:SNSign:

stangGT97 · Nov 1, 2005

98Black4.6 said:
Final numbers:
182.25 hp @4700
232.30 tq @4700

They shut down the run @4700 due to a huge amount of detonation, so I figure I have another 5-8 hp in there when I hit peak power at what, @5300 or so. This is with an auto, and 40 series flows, which may give me back ~2 hp if I take them off... So for anyone contemplating the PI intake swap, you can see the results of it from someone who has done it.

doesnt a stock 98 auto dyno at like 180 rwhp? and your torque seems very low as well... theres something fishy with that, can anyone confirm my suspicion?

ADRENLN · Nov 1, 2005

i think the manuals 98 dyno at 180hp, his is an auto so he would have been a bit less. also like he said, he couldnt even hit peak hp range so there is more in the car then what is shown.

DropTopPony · Nov 1, 2005

my car dyno'd at 178 and 240 stock auto..
a friends 5 sp spun 195 and 245 on the same dyno same day. I bet you have atleast 15 more HP in that car. 4700 rpm is where the PI starts to smoke the NPI.

98MACH1R · Nov 1, 2005

98Black4.6 said:
Final numbers:
182.25 hp @4700
232.30 tq @4700

They shut down the run @4700 due to a huge amount of detonation, so I figure I have another 5-8 hp in there when I hit peak power at what, @5300 or so. This is with an auto, and 40 series flows, which may give me back ~2 hp if I take them off... So for anyone contemplating the PI intake swap, you can see the results of it from someone who has done it.

do you know what the #`s were before the install?

blackink00 · Nov 1, 2005

thats a little low

stangGT97 · Nov 1, 2005

droptopponynj said:
my car dyno'd at 178 and 240 stock auto..
a friends 5 sp spun 195 and 245 on the same dyno same day. I bet you have atleast 15 more HP in that car. 4700 rpm is where the PI starts to smoke the NPI.

yeah my car starts to pull like mad past 4000.. it definitely makes putting the intake on worth the effort, i just wish i could have done the whole swap at once

jamez1502 · Nov 1, 2005

my 98 gt when all it had was catback and cai put down 202hp and 274tq. so yes the numbers seem low..

Mel96GT · Nov 1, 2005

Your numbers may be low but all these dynos are all slightly different. I was at the dyno this past weekend and all I got was 200 rwhp with PI cams and PI intake but I have a stick. I wasn't too happy with those #'s but what the heck. You shouldn't have detonation so you should fix that first. You should clean your MAS and change your filter or try a CAI. I strongly recommend the PI cams since you'll be able to tach out to 5500+ and they are cheap and simple to install. Mine sounded smooth throughout the whole rpm range with the stock tune.

o0akoni0o · Nov 2, 2005

some of you guys are forgetting the '98s had a slight power bump. given that the op's numbers do seem low. when i first got my car (and the only time i've had it dynoed) with just a k/n i made roughly 197-200rwhp.

mrvax · Nov 2, 2005

tomustang said:
weird that you have an auto with 2.73's on a 98.

Nice catch! In 1998, a GT came with 2.73s for 5 speeds, 3.08's with automatics. The optional gear you could order was 3.27s.

tomustang · Nov 2, 2005

mrvax said:
Nice catch! In 1998, a GT came with 2.73s for 5 speeds, 3.08's with automatics. The optional gear you could order was 3.27s.

Yeah seriously, it's documented by Ford themselves yet people are claiming 2.73's

I had the lowest grade 98 GT model with the only option of an auto, had 3.08's.

kj99 · Nov 2, 2005

o0akoni0o said:
some of you guys are forgetting the '98s had a slight power bump. given that the op's numbers do seem low. when i first got my car (and the only time i've had it dynoed) with just a k/n i made roughly 197-200rwhp.

I just noticed your the only other person on here with a dark satin green GT....

There might be more though, I just hadn't seen them yet. Great color IMO

topless98gt · Nov 2, 2005

WITHOUT anything but my Bassani O/R X pipe and Flowmasters, I put down 196rwhp. Also, mine is a manual, does that really make THAT BIG of a difference?!

DropTopPony · Nov 2, 2005

topless98gt said:
WITHOUT anything but my Bassani O/R X pipe and Flowmasters, I put down 196rwhp. Also, mine is a manual, does that really make THAT BIG of a difference?!

yup, @ 15rwhp on a stock NPI. maybe more on a PI, i forget the hp loss percentage .

Venom_Nitrous · Nov 3, 2005

Could his numbers be way off because he told the dyno operator that he had 2.73's when he maybe has 3.08's? And drivetrain loss is about 20% auto, 15% man.

Back from the dyno after PI intake install....

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