Just mulling over this.

Thinking about the Granny's Speed Shop 5.0L conversion.

Are there any ground clearance issues with the kit?

Can it be run with true dual exhaust (like Mustangs)?

How does the RX-7 rear-end hold up?

What wheels are available to compensate for the increased power? I'm thinking 16x8" rims are the minimum I'd want to have under there.

Does the Edelbrock RPM II Intake fit under the stock hood? (Fuel Injected)

Why does Granny's recommend a mechanical fan? I have one in my 90 Mustang GT and it's loud and absorbs power.

Any brake upgrades for the 7 that would work with the previous mentioned wheels?

Thanks everyone!
IJ

 

nevermind. I goofed.

 

TTT
What nobody's done this conversion?

Really wondering how the rear end holds up to 300RWHP and similar low-end torque.

 

Read about my Ford 5.0 conversion on my Car Domain page:

http://www.cardomain.com/memberpage/646433

The rear end should be OK, but you will want an overdrive trans if you drive it on the street. I get very little wheelspin with the wheels and tires I am running, but if I hammer the throttle from a standing start, it will smoke the tires. I stated on this forum once before, I think stoplight drag racing is childish and immature, but if the guy in the next lane is driving one of those expensive German cars, you do what you have to do!

The 1st gen does not really have enough room for full dual exhaust. We ran Headman headers, turned down a bit early and have a crossover just ahead of the torque converter, then a Y into a 3 inch system on the right side. Even that is a bit tight, and the exhaust is the lowest point of the car.

My photos show what I did for hood clearance. I bought the Ford Motorsports short aluminum water pump and pulleys, which run the fan at about crankshaft speed. I made an adapter plate for the stock RX-7 fan (no clutch), spaced the stock shroud back about 3 inches, cools just fine.

I built my mounts before Grant started selling Ford kits, and modified the crossmember and a front-sump pan, but I did use his driveshaft flange, which was a good deal. The reference page shows my brake conversion. The wheels I am using are perfectly adequate for any normal street use. If you are building a serious drag racer, you may want more.


E-mail me if you want some photos or have questions, but please don't ask unless you are serious about this.

thestilettoman@msn.com

 

I didn't see an intake manifold on your 5.0 conversion RX-7. Was that a custom box intake or something?

Man you do some cool projects!

 

My intake is an Edelbrock Performer RPM manifold, originally used an Edelbrock 600 carb, which ran very well, but did not give me the high RPM power I wanted. Now I have a Holley 675 Street AVenger, which gives noticeable more power, and better mid range torque.

The air box was originally from a Buick V6 of some sort, and the top was squashed down to fit under the hood braces. I took off the bottom and hammered it out to the shape you see with the 3 inch inlet. It seems to work well with the K&N filter I used.

 

go with an electric fan (1 puller, 2 pusher). Grannies was wrong with the mechanical point. Most people dont even get it to fit between the motor and raditator.

 

http://www.torquecentral.com/forumdisplay.php?f=11
They have a really good search engine there.


Toughguy