What effects can I expect from swapping a Mustang HO intake with the stock T-Bird.

Topic: What effects can I expect from swapping a Mustang HO intake with the stock T-Bird. (Read 5293 times) previous topic - next topic

What effects can I expect from swapping a Mustang HO intake with the stock T-Bird.

Reply #15 – February 06, 2017, 11:42:57 PM

Quote from: 87tbird_org_owner;459136

I wonder what 190HP or more feels like in the T-Bird? Probably twisted the hell out of the body because the body on my car has about a 1" twist in it.

LOL 190Hp isn't going to twist anything... I've hit mine with 125/150Hp shot of nitrous for aprox 440Hp total, still sets level...

What effects can I expect from swapping a Mustang HO intake with the stock T-Bird.

Reply #16 – February 08, 2017, 03:01:46 AM

Quote from: TurboCoupe50;459160

LOL 190Hp isn't going to twist anything... I've hit mine with 125/150Hp shot of nitrous for aprox 440Hp total, still sets level...

From what I've found about fox body cars you're very fortunate to still have a level car.

What effects can I expect from swapping a Mustang HO intake with the stock T-Bird.

Reply #17 – February 09, 2017, 03:36:50 PM

I have e5 heads ho intake and tb ho headers 2.5" exhaust no smog or egr and the engine runs great

What effects can I expect from swapping a Mustang HO intake with the stock T-Bird.

Reply #18 – February 09, 2017, 04:19:48 PM

Quote from: Moonmount;459192

I have e5 heads ho intake and tb ho headers 2.5" exhaust no smog or egr and the engine runs great

You've got WAY too much exhaust for those heads, that cam, and 14# injectors. You're probably giving up power having such large piping. A Mark VII 2" H-pipe would probably make more power with your combo, especially at low RPM.
Or, go full HO swap (heads, cam, injectors, EEC) and be just a little excessive.
Think of it like trying to blow out a candle while blowing through a 2" pipe that's 2 feet long. You lose so much velocity, that you can't get the work done. The same task with a 1/2 or 3/4 inch tube would be successful. Exhaust gas has inertia, so if you keep the velocity up by using appropriate size tubing, the momentum of the exhaust in the pipe will help to evacuate new exhaust from the ports (and cylinder) with greater efficiency by creating a lower pressure area at the port. It's called cylinder scavenging, and overkill is a thing.

What effects can I expect from swapping a Mustang HO intake with the stock T-Bird.

Reply #19 – February 09, 2017, 07:23:18 PM

Yeah I know, I had and have a lot planned for the car. I have 3.73 gears, worked e7 heads, a 95 gt cam and plenty of other parts sitting in storage. But I hit a massive deer with my daily and combined with job issues and the sad fact that 3/4 slip super bad I kinda just gotta live with it at the moment. :/

What effects can I expect from swapping a Mustang HO intake with the stock T-Bird.

Reply #20 – February 09, 2017, 09:46:29 PM

Quote from: 87tbird_org_owner;459179

From what I've found about fox body cars you're very fortunate to still have a level car.

Nah. It's fine. Subframe connectors and it's golden. Been beating on my car for years and it's still level.

What effects can I expect from swapping a Mustang HO intake with the stock T-Bird.

Reply #21 – February 10, 2017, 09:16:25 AM

Quote from: TheFoeYouKnow;459193

You've got WAY too much exhaust for those heads, that cam, and 14# injectors. You're probably giving up power having such large piping. A Mark VII 2" H-pipe would probably make more power with your combo, especially at low RPM.

What??? Maybe 3-4Hp??

Always go big so you have room to grow...

What effects can I expect from swapping a Mustang HO intake with the stock T-Bird.

Reply #22 – February 10, 2017, 09:52:20 AM

If a person was in some kind of spec racing class I can see where tuning the exhaust to the motor makes 100% sense but in this case with the future mods he is going to make then the 2-1/2" exhaust is money well spent. My 331 wants more exhaust than the 2-1/2 but with the torque arm and panhard bar that is all its going to see.

Update on changing stock upper intake manifold to H.O. manifold.

Reply #23 – April 25, 2018, 08:25:01 AM

Since the bottom portion of both intake manifolds are the same the H.O. Manifold bolted right on with no problems. Added the H.O. Throttle Body and EGR Spacer and then just switched over the Non H.O. TPS, Idle Control Solenoid and EGR. Made a little adjustments on the TPS position and base idle screw and engine runs fine. No surging or off idle stumble. All this may of been a wasted effort because I don't notice any more HP even with 1.7 ratio Rocker Arms. I've got shorty headers and the H.O. Mustang Cat forward exhaust I could install but that probably won't add any HP either. For any real HP gains I guess I'll have to open the engine up and put in a different Cam and Heads that have a higher compression ratio. 150 stock HP just doesn't cut it on the road anymore. It's okay in the city and it gets great MPG on the highway. Can still get 30 Highway MPG after 31 years. Just have to be careful when passing other cars.

What effects can I expect from swapping a Mustang HO intake with the stock T-Bird.

Reply #24 – April 25, 2018, 08:54:13 AM

If you are going to open up the engine then just convert to mass air. Watch the 1.7:1 rockers with a cam swap and the pistons as you may not have the reliefs in your pistons like the Mustang HO motors.

Funny thing is when I put long tube headers and a full dual exhaust on the stock throttle body 302 in my '83 is made a huge difference. Have you done a leak down test on the motor to see if you have good compression on all cylinders? Could also be that any additional power you are gaining is just blowing through the converter on the trans. My just be a time in the river thing after 31 years.

What effects can I expect from swapping a Mustang HO intake with the stock T-Bird.

Reply #25 – April 25, 2018, 11:50:56 AM

I thought a few guys had used 1.7s with stock HO spec cams (like 87-93 Mustangs)with no issues? I could be mistaken. What was the difference on the 93 Cobra cam spec? Didn’t they have 1.7s? Sorry to derail the thread...

What effects can I expect from swapping a Mustang HO intake with the stock T-Bird.

Reply #26 – April 26, 2018, 06:08:56 PM

93-95 cobra did have 1.7's, but they were also mass air.