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Topic: Stock HO Camshaft (Read 3301 times) previous topic - next topic

Stock HO Camshaft

Is it possible to install the stock HO cam in a stock 87 T-bird without chaning over the computer and fuel injectors??? Thanks for the help...Love the site!!!

Re: Stock HO Camshaft

Reply #1 –
No. The HO cam uses a different firing order so the fuel injectors would be firing out of sequence. The SO computer would not know what to do with the different vacuum characteristics of the HO cam, and the injectors wouldn't deliver enough fuel to make it run decent.

It might run, but it wouldn't run good!
2015 Mustang GT Premium - 5.0, 6-speed, Guard Green - too much awesome for one car

1988 5.0 Thunderbird :birdsmily: SOLD SEPT 11 2010: TC front clip/hood ♣ Body & paint completed Oct 2007 ♣ 3.55 TC rear end and front brakes ♣ TC interior ♣ CHE rear control arms (adjustable lowers) ♣ 2001 Bullitt springs ♣ Energy suspension poly busings ♣ Kenne Brown subframe connectors ♣ CWE engine mounts ♣ Thundercat sequential turn signals ♣ Explorer overhead console (temp/compass display) ♣ 2.25" off-road dual exhaust ♣ T-5 transmission swap completed Jan 2009 ♣

Re: Stock HO Camshaft

Reply #2 –
Quote from: Thunder Chicken
No. The HO cam uses a different firing order so the fuel injectors would be firing out of sequence. The SO computer would not know what to do with the different vacuum characteristics of the HO cam, and the injectors wouldn't deliver enough fuel to make it run decent.

It might run, but it wouldn't run good!

Well when you run the spark plugs wires differently, couldnt you also remove the injectors and place them in the right hole as well???I realize youd have to do some wiring extensions but it could be done??

Re: Stock HO Camshaft

Reply #3 –
That would solve the injectors firing out of sequence, but it still wouldn't change the fact that the SO computer would choke on a cam change. Remember, the SO computer is speed density, and speed density can't adjust for increases in airflow or vacuum. Like I said - it might run, but it wouldn't run well.

It'd be easier to swap the computer than it would be to rewire the injectors
2015 Mustang GT Premium - 5.0, 6-speed, Guard Green - too much awesome for one car

1988 5.0 Thunderbird :birdsmily: SOLD SEPT 11 2010: TC front clip/hood ♣ Body & paint completed Oct 2007 ♣ 3.55 TC rear end and front brakes ♣ TC interior ♣ CHE rear control arms (adjustable lowers) ♣ 2001 Bullitt springs ♣ Energy suspension poly busings ♣ Kenne Brown subframe connectors ♣ CWE engine mounts ♣ Thundercat sequential turn signals ♣ Explorer overhead console (temp/compass display) ♣ 2.25" off-road dual exhaust ♣ T-5 transmission swap completed Jan 2009 ♣

Re: Stock HO Camshaft

Reply #4 –
Quote from: Thunder Chicken
That would solve the injectors firing out of sequence, but it still wouldn't change the fact that the SO computer would choke on a cam change. Remember, the SO computer is speed density, and speed density can't adjust for increases in airflow or vacuum. Like I said - it might run, but it wouldn't run well.

It'd be easier to swap the computer than it would be to rewire the injectors

With a STOCK HO cam the LSA is like 116 so the SD computer would be fine. The KEY to making any SD cam changes are to use cams that have a min of 114LSA. This eliminates any of the FORD "Alphabet" cams, I have changed H,C,I, on 3 different mustangs all while staying SD. My cam of choice is the Crower 15511.

Re: Stock HO Camshaft

Reply #5 –
Thanks for the information guys... It sounds like it would be easier to go with a Mustang computer... Do I need a special wiring harness or will it just plug into the existing harness or is there any special wiring that needs to be done.  Thanks again.

Re: Stock HO Camshaft

Reply #6 –
Quote
Do I need a special wiring harness or will it just plug into the existing harness or is there any special wiring that needs to be done. Thanks again.


Just plug and play. :ies:
95 Ranger Splash 2.3
88 Tbird Sport :ies::ies:
5.0 SO, stainless shorty headers, w/ Magnaflow lers. KYB struts, KYB shocks. 5lug conversion from sn95 Mustang, subframe connectors, drilled and slotted rotors, 03 Mach 1 wheels. sequential taillights.140 speedo

Re: Stock HO Camshaft

Reply #7 –
Thanks everybody!

Re: Stock HO Camshaft

Reply #8 –
Oh yeah, one more question, does it matter if I get a computer from a Mustang that had no power options if I currently have a car that does have power options.

Re: Stock HO Camshaft

Reply #9 –
Quote from: ablinkpunk
Oh yeah, one more question, does it matter if I get a computer from a Mustang that had no power options if I currently have a car that does have power options.

no.

Re: Stock HO Camshaft

Reply #10 –
when i install the cam will i need to install new lifters

Re: Stock HO Camshaft

Reply #11 –
With roller lifters in most cases you can just reuse them, they don't wear like flat tappet. :grinno:
95 Ranger Splash 2.3
88 Tbird Sport :ies::ies:
5.0 SO, stainless shorty headers, w/ Magnaflow lers. KYB struts, KYB shocks. 5lug conversion from sn95 Mustang, subframe connectors, drilled and slotted rotors, 03 Mach 1 wheels. sequential taillights.140 speedo

Re: Stock HO Camshaft

Reply #12 –
just get an SD mustang computer and plug it in, you will be fine.  I just bought two off ebay, one for 19.95, and one for 25.00.  You need to get some 19lb injectors and an HO upper plenumn and TB to get the performance your looking for.  Also H.O. shorties can be had very cheap and are better than the stock manifolds although I would get some macs or other and do it once instead of upgrading later.  I had an 86 mustang gt rated at 200 horse and thats about what you will get with the HO cam, computer and headers.  I put the better upper intake, e7 heads and TB off an 87 on my 86 GT and it made a very noticible difference from 4200 rpm up.  It came on the pipe so to speak if you have ever rode a 2 stroke dirt bike you know what I mean.  There was no noticible difference in the low and mid though.  good luck

Re: Stock HO Camshaft

Reply #13 –
If your cougar is automatic trans, you will need a computer from a stang with auto trans too.  Not manuel.    Automatic computers works in manuel cars but NOT the other way around.

Re: Stock HO Camshaft

Reply #14 –
Quote from: merccougar50
If your cougar is automatic trans, you will need a computer from a stang with auto trans too.  Not manuel.    Automatic computers works in manuel cars but NOT the other way around.


Not so, the manual computer will work in a auto... That ONLY applies if you are using a AODE('94-'95 Mustang), that the EEC controlls the shifts.