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Nitrous on swapped PI intake, reciepe for disaster?

  • Thread starter Thread starter bhuff30
  • Start date Start date Mar 1, 2009

bhuff30

Founding Member
Dec 11, 2001
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35
129
Olathe KS
Mar 1, 2009
#1
  • Mar 1, 2009
  • #1
The PI intake has a slightly different port shape than the NPI, and isn't a perfect match when the PI intake is put on NPI heads. The mis-match is at the top of the port?

I'm wondering if the ledge that interupts airflow would potentially cause fuel puddling when running a wet shot, which could cause a nasty backfire. Anyone run a wet shot on a swapped PI intake and how big a shot? If the interuption to flow is at the top, it probably wouldn't get the chance to puddle.

Right now, I've got an off-road H pipe and went 14.2@97mph. I wonder what it would run with nittos, a PI intake, Al driveshaft and a 100 shot? A very high 12, or low 13 probably? Consider this bench racing for now... I'm considering retireing the 2.3. It killed another turbo. Something about 22-24 psi and they start puking, and I don't really want to spend 1000$+ to go with a bigger turbo and engine management to support it.
 

parrish5o

New Member
Dec 22, 2008
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Dirty South
Mar 1, 2009
#2
  • Mar 1, 2009
  • #2
I don't see much of a chance for fuel to puddle right there. I think you'll be okay but I would get more info on this before I went through with it. I have seen more than one intake and hood destroyed by a nitrous backfire.
 

98COBRA281

10 Year Member
Nov 24, 2007
1,348
30
59
Port St. Lucie, Florida
Mar 1, 2009
#3
  • Mar 1, 2009
  • #3
i have a zex wet kit, and a pi intake, but my npi heads are port matched to pi gaskets so i have no ledge, i cant wait till i get it all hooked up and spray it, hoping to get into the VERY low 12's if not better.............
 

bhuff30

Founding Member
Dec 11, 2001
6,037
35
129
Olathe KS
Mar 2, 2009
#4
  • Mar 2, 2009
  • #4
98cobra281: That's a strong combination you have. Ever run at the track without the nitrous? If everything went perfectly, I could see a deep 11, with sticky tires and a very hard launch of course. My 2.3 went 12.26 with 306rwhp (mustang dyno), but it has a race weight closer to 3100 which is probably 4-500lbs less than an SN95.
 

cobra2798

New Member
Mar 30, 2005
303
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0
Clermont, Florida
Mar 2, 2009
#5
  • Mar 2, 2009
  • #5
Plastic intake goes BOOM!!! My buddy shattered the stock intake on his 03 on a 100 shot, he replaced it with the Pro products typhoon and never had a issue again.
 

bhuff30

Founding Member
Dec 11, 2001
6,037
35
129
Olathe KS
Mar 2, 2009
#6
  • Mar 2, 2009
  • #6
It shattered due to a nitrous backfire, not because it is made of plastic and couldn't handle the loads.

I get the feeling that the stock 4.6 intakes in general tend to cause fuel puddling and can't handle a big wet shot. They bend down before turning streight up again, I wonder if that is part of the problem.

cobra2798 said:
Plastic intake goes BOOM!!! My buddy shattered the stock intake on his 03 on a 100 shot, he replaced it with the Pro products typhoon and never had a issue again.
Click to expand...
 

98COBRA281

10 Year Member
Nov 24, 2007
1,348
30
59
Port St. Lucie, Florida
Mar 2, 2009
#7
  • Mar 2, 2009
  • #7
bhuff30 said:
98cobra281: That's a strong combination you have. Ever run at the track without the nitrous? If everything went perfectly, I could see a deep 11, with sticky tires and a very hard launch of course. My 2.3 went 12.26 with 306rwhp (mustang dyno), but it has a race weight closer to 3100 which is probably 4-500lbs less than an SN95.
Click to expand...

no i have not yet run it at the track with this motor, because it still has not been fine tuned on the dyno, im pretty much running a mail order tune, and i want to get a few more miles on the motor, its almost at 1500 miles now, so it will be soon, but it pulls incredable from 4000-6300ish
 
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