pi intake and cam swap

98bluevert · Nov 11, 2006

ok i'm tired of searching on here. I'm getting ready to do the swap. I know it is suppose to add 30ish rwhp. What about tq numbers.

Do i need a tune or can it wait till after i headers, and a couple other things?

Also what should i run a the track: 98 Vert, 4.10's, MM subframes, Mac off-road prochamber, TF upper intake, ET streets. 750 ft above sea level

Last time i ran at the 1/8th mile i only had gears and street tires. couldn't hook up very well and posted a 9.30 with something like a 2.3 60ft.

Could i see mid to low 8 sec passes with the mods listed above or does anyone know what 1/4 mile passes would be close to.

Also what are the Tq number differences between PI intake, cams, and heads, to just intake and cams

98bluevert · Nov 12, 2006

BUMP.

Anybody have any ideas

DropTopPony · Nov 12, 2006

you should gain 15-25rwtq with the intake and cam swap....you don't need a tune imediately but it will be best to get one as soon as you can.

COramprat · Nov 12, 2006

I gained 10 with the intake and 30 with cams but I have Comp 262's. My guess would be in the 25-30 range. That will get you 4-5 tenths at the track.

d98gt · Nov 12, 2006

I'm curious on the tune question as well. I'll be getting my cams installed this month (PI cams) and then will be doing the PI intake in early December.

I would have liked to do them both at the same time, though the intake install suggests waiting atleast 24 hours for the RTV, so i'll do that on a weekend when I can afford the down time. Plus I have already switched the intake manifold once before so I can do it myself.

so.. tune or no tune for a basically stock car w/ pi cams (then pi intake later)?

LI98GTStang · Nov 12, 2006

I still have my stock tune post PI cams and intake with no problems. Had it dyno'd and the A/F numbers are more than acceptable.

Pennywise2 · Nov 13, 2006

People how are doing the PI intake and camshaft swap
should consider a dyno tune to see where your A/F ratio
is at.I bet after the swap you will run rich.

tomustang · Nov 13, 2006

Pennywise2 said:
People how are doing the PI intake and camshaft swap
should consider a dyno tune to see where your A/F ratio
is at.I bet after the swap you will run rich.

it's fine, never had a problem

d98gt · Nov 13, 2006

alright thanks for the info LI

Pennywise2 · Nov 13, 2006

tomustang said:
it's fine, never had a problem

That's great to hear Tom.
Did you ever get a new steering wheel for your Cobra?

Dusstbuster · Nov 13, 2006

Pennywise2 said:
People how are doing the PI intake and camshaft swap
should consider a dyno tune to see where your A/F ratio
is at.I bet after the swap you will run rich.

Would it be rich or lean? The PI cam/manifold swap's basic premis is that the stock NPI parts don't flow enough air whereas the upgraded parts flow a bunch more air...wouldn't that have more of a tendancy to run lean or would the ECU overcompensate and run it rich?

98bluevert · Nov 14, 2006

Thanks for the all the info. does anybody have any links to dyno charts with the swap done.

Also anyone got any heads up pointers for installing the cams, i have done the npi intake with new crossover so I don't need pointers on it.

NPIGT · Nov 14, 2006

I did the swap around April this year and I felt a considerable difference. I used a cam chain retention tool to swap the cams out. It worked good, and dont over torque the cam cap bolts because they are $5 a piece and you have to buy them in sets of 4 . I laugh now, but I wasnt happy then. You will feel results. Good luck.

LI98GTStang · Nov 14, 2006

98bluevert said:
Thanks for the all the info. does anybody have any links to dyno charts with the swap done.

Also anyone got any heads up pointers for installing the cams, i have done the npi intake with new crossover so I don't need pointers on it.

Here is my dyno charts post PI intake and cams. Charts are labeled STD, but were marked wrong when they printed the sheets - they are SAE.

best pull - engine hot

A/F

As for the install, I had pulled the front cover, but if I had to do it again, I would have gone the route of using the cam removal tool from Ford to save time/labor. If you use the tool, just follow the directions that come with the tool. It's really a bolt-in affair. You can leave the intake on the engine which also saves time and energy.

d98gt · Nov 14, 2006

That's the route that my installer is going to go. I'll do the intake at a later time since I can for sure do it on my own

H What 4.6 · Nov 14, 2006

LI98GT what other mods was that with??

LI98GTStang · Nov 14, 2006

H What 4.6 said:
LI98GT what other mods was that with??

Just what's in my sig. basically a catted x, pulleys and FRPP catback with stock tune.

Dusstbuster · Nov 14, 2006

Wow! Isn't 17.5 EXTREMELY lean even at that low of RPMs?

LI98GTStang · Nov 14, 2006

Dusstbuster said:
Wow! Isn't 17.5 EXTREMELY lean even at that low of RPMs?

I was told by the shop that type of a curve is perfectly normal.

pi intake and cam swap

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