Replacing Intake, throttle body- questions?

Topic: Replacing Intake, throttle body- questions? (Read 15790 times) previous topic - next topic

Replacing Intake, throttle body- questions?

Reply #15 – November 20, 2017, 11:59:04 PM

With the stock cam 1.7s should clear fine.

Only run an intake spacer if you need it for valve cover clearance. A 1/2" spacer will work fine and clear the stock hood. The GT40 intakes have plenty of runner length as it is so adding a spacer isn't really necessary.

Replacing Intake, throttle body- questions?

Reply #16 – November 21, 2017, 11:16:36 AM

1.7s it is. I use a 1" spacer on my HO engine mainly for heat but also for clearance to check the injectors for leaks and keep things cleaned up.

I used the motor mount perches off of the LSC and had them welded in. With the 1" spacer on the HO intake I have 1.25" of space under the hood.

I still have my Sport hood and want to have it cut along the ridge, add 1.5", raising it up like a cowl hood only all metal. I don't like the look and finish of most cowl hoods.

Replacing Intake, throttle body- questions?

Reply #17 – November 21, 2017, 01:59:46 PM

Quote from: tommym;463783

1.7s it is. I use a 1" spacer on my HO engine mainly for heat but also for clearance to check the injectors for leaks and keep things cleaned up.

I used the motor mount perches off of the LSC and had them welded in. With the 1" spacer on the HO intake I have 1.25" of space under the hood.

I still have my Sport hood and want to have it cut along the ridge, add 1.5", raising it up like a cowl hood only all metal. I don't like the look and finish of most cowl hoods.

I wouldn't be worried about hood clearance. I'm talking about runner length. The distance air travels from the upper intake plenum to the cylinder head. A GT40 intake has about 15" of runner length. Adding a 1" spacer gives you 16" of runner length. All the spacer is doing is shifting the engine power band down (longer runner = lower rpm power peak). The long runner GT40 intake doesn't need any more help creating low rpm power. If anything a 1" spacer would lower peak power rpm and cut top end power somewhat.

Replacing Intake, throttle body- questions?

Reply #18 – November 21, 2017, 02:11:05 PM

Got it. I understand what you are talking about. Thanks for the explanation.

Replacing Intake, throttle body- questions?

Reply #19 – November 21, 2017, 03:10:49 PM

Just trying to help, a bit.

That being said I did run a 1/2" intake spacer when I had an Explorer GT40 intake. I needed it for valve cover clearance. Without it the throttle bracket hit the valve covers I was running. That is the only reason I would run an intake spacer.

BTW I know you have a T5 but what rear gear do you have in the car? 3.55s or 3.73s?

Replacing Intake, throttle body- questions?

Reply #20 – November 21, 2017, 08:21:59 PM

The car is a real Turbo Coupe. If I remember the tag on the rear end showed 355's. I have heard they also came with 373's.

Replacing Intake, throttle body- questions?

Reply #21 – November 21, 2017, 10:34:45 PM

Quote from: tommym;463788

The car is a real Turbo Coupe. If I remember the tag on the rear end showed 355's. I have heard they also came with 373's.

If it was a factory 5 speed Turbo Coupe than it had 3.55s. What T5 do you have?

If you had 3.73s I was going to suggest a little more aggressive intake, but with 3.55s and a T5 the GT40 intake should work great.

Replacing Intake, throttle body- questions?

Reply #22 – November 22, 2017, 10:00:33 AM

Quote from: tommym;463788

The car is a real Turbo Coupe. If I remember the tag on the rear end showed 355's. I have heard they also came with 373's.

For the '87 & '88, 5-spd 3.55, auto 3.73...

Earlier model TC all had 7.5" 3.45 reguardless of transmission...

Replacing Intake, throttle body- questions?

Reply #23 – November 22, 2017, 10:38:53 AM

[FONT="]The T-5 I have is- 1994 T5 5 Speed (ID #1352-246), (P/N F4ZR-7003-DA)

It has a 335 1st gear and a .68 5th gear. At 70 I'm hitting 2000.

[/FONT]

Replacing Intake, throttle body- questions?

Reply #24 – February 20, 2018, 03:16:57 PM

Making some progress getting parts. The heads will be Trick Flow 170, 61cc, Trick Flow 1.6, Haven't decided on the cam yet. Any suggestions?

Replacing Intake, throttle body- questions?

Reply #25 – February 20, 2018, 03:25:56 PM

Here's the valve covers I plan on using. I'm not really into a lot of chrome but these looked good.

Replacing Intake, throttle body- questions?

Reply #26 – February 20, 2018, 08:41:36 PM

For something off the shelf the Comp XE264HR would go well. It should make power to 5500rpm and be very streetable.

Replacing Intake, throttle body- questions?

Reply #27 – February 21, 2018, 10:14:18 AM

Thank you. That sounds good. I'm not building a race car just one that is fun to drive. My knowledge of cams is a little limited. With the stock pistons I know the lift is limited to about 510.

Replacing Intake, throttle body- questions?

Reply #28 – February 21, 2018, 07:37:14 PM

Quote from: tommym;464688

Thank you. That sounds good. I'm not building a race car just one that is fun to drive. My knowledge of cams is a little limited. With the stock pistons I know the lift is limited to about 510.

With stock HO pistons you can run more than .510 lift. It's not peak lift that's the issue, as the piston is at the bottom of the cylinder at peak lift, it's duration. Duration is how long the value is open. For example I have stock style HO pistons in my car with inline cylinder heads that have 1.90" intake valves. The cam in the engine has .533 lift. Everything clears fine.

As a FYI this is the Comp cam I recommended to you: https://www.summitracing.com/parts/cca-35-349-8/overview/make/ford

Replacing Intake, throttle body- questions?

Reply #29 – February 22, 2018, 10:43:44 AM

Thanks for the heads up. After your message I started reading up on cams so I can understand them better. Looks like the one you recommend is just what I need. Do you think I will have a problem with the Trick Flow heads? They have 2.02 intake and 1.60 exhaust.

[h=1]Trick Flow® Twisted Wedge® 170 Cylinder Heads for Small Block Ford TFS-51410004-M61[/h]