My engine swap project

furreal302 · June 19th, 2011, 10:49 PM

I got 94 GT for cheap excellent condition with 217k miles on it. The motor was tired and mixing coolant/oil. I got an explorer motor from the u pull it for $75 and it was well maintained. Using the GT40p heads and intake, somebody gave me some headers and I painted the block and valve covers nice plus ordered a chrome oil pan. Swapped the mustang cam in the motor too. I'm excited to have a little extra power than stock, does anybody have a guess at how much extra HP I might get?

THE RY4N · June 19th, 2011, 11:31 PM

Wow, i just bought a 94 Mustang GT with a blown head gasket and was looking at dropping in an explorer engine or swapping the top end but with work I've got enough money but no time to dig in and start. How is the swap going so far? Have you run into any problems yet?

From what i've read the gt40p heads and intake swap can get you 30-50hp+ more if you cam it and some other mods to support it.

SS EATR · June 21st, 2011, 12:13 AM

im not sure what kind of compression the explorer motor has but im guessing around 30 more to the wheels

furreal302 · June 21st, 2011, 09:57 PM

The only problem I anticipate is the throttle body angle. Is there an elbow I can use for the throttle body on the Explorer upper intake? The stock intake comes out toward the inner fender but the Explorer one goes straight. I was thinking of looking around the junkyard for a proper rubber intake hose to use. It should be easy enough to do that with my CAI.
We got the motor and tranny bolted together after putting a new rear main seal in. Just have to bolt on the engine mount brackets and drop it in. I'm using the stock automatic but thinking about a 5 speed swap in the future right now I just want it running.

MANZO MUSTANG · June 22nd, 2011, 01:08 AM

Sounds like you're coming along, keep us posted.

furreal302 · June 22nd, 2011, 08:45 PM

got the engine in this afternoon.

MANZO MUSTANG · June 23rd, 2011, 12:05 AM

Awesome.

91cobra5.0 · June 25th, 2011, 04:51 PM

looks good, you dropped it in with the trans attached?

yellowsilver · July 4th, 2011, 05:38 PM

Looks great!

furreal302 · July 12th, 2011, 12:21 AM

I dropped the motor and trans in together, it's always easier to do it like that. Lining things up in-car is a real PITA. Anyway, I've got the thing 90 percent complete I'm just waiting on my throttle body elbow to come in the mail which should be in tomorrow. Then I can bolt on the throttle body and work out the throttle linkage and put on the distributor cap and wires, and fire it up. It's looking great and coming along nicely.

94bossgt · July 20th, 2011, 03:02 PM

did you replace the valve springs on the gt40 heads they are very weak from factory and would be in your best interest to replace them right away

furreal302 · July 24th, 2011, 08:29 PM

I left the stock valve springs in it. I wish I knew how weak the springs are when I brought it to the machine shop. Maybe I'll do that over the winter.

The car is running now and it runs great. I took it for a little drive and everything is working great. I got a code for the EGR so I have to get one of those things that fool the computer into thinking it's still there. The header that I had to modify with the ball peen hammer is leaking at the flange on the #8 cylinder where I had to dent it. Not so sure on what to do about that because pulling the header out with everything installed doesn't look like much fun.

99FiveOh · July 25th, 2011, 12:59 PM

Nice job! Yeah, the stock springs on those Explorer heads have always been a deal breaker for me. Sure you can get the heads cheap, but they will cost $$ to get them up to par to run with any kind of descent lift cam.

But as long as you aren't too aggressive with it you should be fine.

June 19th, 2011, 10:49 PM	#1
furreal302 Regular 94 GT 13.95@100 Join Date: Jun 2011 Location: NY Posts: 435 iTrader: 2 reviews	My engine swap project I got 94 GT for cheap excellent condition with 217k miles on it. The motor was tired and mixing coolant/oil. I got an explorer motor from the u pull it for $75 and it was well maintained. Using the GT40p heads and intake, somebody gave me some headers and I painted the block and valve covers nice plus ordered a chrome oil pan. Swapped the mustang cam in the motor too. I'm excited to have a little extra power than stock, does anybody have a guess at how much extra HP I might get?

June 21st, 2011, 12:13 AM	#3
SS EATR Regular 2003 Mustang Mach 1 Join Date: Jun 2011 Location: La Crosse, VA Posts: 148 iTrader: 0 reviews	im not sure what kind of compression the explorer motor has but im guessing around 30 more to the wheels __________________ 2003 Mach 1 Oxford White K&N intake, Magnaflow Exhaust

June 22nd, 2011, 01:08 AM	#5
MANZO MUSTANG Regular 1994 MUSTANG GT 15.15 @ 94.12 Join Date: Dec 2009 Location: Coachella Posts: 291 iTrader: 1 reviews	Sounds like you're coming along, keep us posted. __________________ 1994 Ford Mustang GT, 306CHP(260rwhp) Auto,MM Full Length SFC, otherwise stock suspension.

June 23rd, 2011, 12:05 AM	#7
MANZO MUSTANG Regular 1994 MUSTANG GT 15.15 @ 94.12 Join Date: Dec 2009 Location: Coachella Posts: 291 iTrader: 1 reviews	Awesome. __________________ 1994 Ford Mustang GT, 306CHP(260rwhp) Auto,MM Full Length SFC, otherwise stock suspension.

July 25th, 2011, 12:59 PM	#13
99FiveOh Regular 1999 Mustang Join Date: Apr 2010 Location: Jacksonville, FL Posts: 204 iTrader: 0 reviews	Nice job! Yeah, the stock springs on those Explorer heads have always been a deal breaker for me. Sure you can get the heads cheap, but they will cost $$ to get them up to par to run with any kind of descent lift cam. But as long as you aren't too aggressive with it you should be fine. __________________ 1999 V6 Vert converted to 5.0 EFI with Vortech V2 SQ, Edelbrock Performer intake, BBK shorties, O/R H, Flowmasters, 42lb injectors, 75mm Pro-M with MAFia extender, 255lph fuel pump. SCT tuned 370 rwhp 400 rwtq.

June 19th, 2011, 11:31 PM	#2
THE RY4N Regular 1994 / 2001 Mustang GT Join Date: Jun 2011 Location: Andover, Minnesota Posts: 174 iTrader: 0 reviews	Wow, i just bought a 94 Mustang GT with a blown head gasket and was looking at dropping in an explorer engine or swapping the top end but with work I've got enough money but no time to dig in and start. How is the swap going so far? Have you run into any problems yet? From what i've read the gt40p heads and intake swap can get you 30-50hp+ more if you cam it and some other mods to support it.

June 21st, 2011, 09:57 PM	#4
furreal302 Regular 94 GT 13.95@100 Join Date: Jun 2011 Location: NY Posts: 435 iTrader: 2 reviews	The only problem I anticipate is the throttle body angle. Is there an elbow I can use for the throttle body on the Explorer upper intake? The stock intake comes out toward the inner fender but the Explorer one goes straight. I was thinking of looking around the junkyard for a proper rubber intake hose to use. It should be easy enough to do that with my CAI. We got the motor and tranny bolted together after putting a new rear main seal in. Just have to bolt on the engine mount brackets and drop it in. I'm using the stock automatic but thinking about a 5 speed swap in the future right now I just want it running.

June 22nd, 2011, 08:45 PM	#6
furreal302 Regular 94 GT 13.95@100 Join Date: Jun 2011 Location: NY Posts: 435 iTrader: 2 reviews	got the engine in this afternoon.

June 25th, 2011, 04:51 PM	#8
91cobra5.0 Hardcore Enthusiast 98 Cobra Join Date: Jan 2008 Location: Bay Area, Ca Posts: 2,057 iTrader: 0 reviews	looks good, you dropped it in with the trans attached?

July 4th, 2011, 05:38 PM	#9
yellowsilver Newbie 1995 Mustang GT Join Date: Apr 2011 Location: Southwest MO Posts: 20 iTrader: 0 reviews	Looks great!

July 12th, 2011, 12:21 AM	#10
furreal302 Regular 94 GT 13.95@100 Join Date: Jun 2011 Location: NY Posts: 435 iTrader: 2 reviews	I dropped the motor and trans in together, it's always easier to do it like that. Lining things up in-car is a real PITA. Anyway, I've got the thing 90 percent complete I'm just waiting on my throttle body elbow to come in the mail which should be in tomorrow. Then I can bolt on the throttle body and work out the throttle linkage and put on the distributor cap and wires, and fire it up. It's looking great and coming along nicely.

July 20th, 2011, 03:02 PM	#11
94bossgt Regular 94 mustang gt too slow to tell Join Date: Jun 2010 Location: northampton pa Posts: 233 iTrader: 0 reviews	did you replace the valve springs on the gt40 heads they are very weak from factory and would be in your best interest to replace them right away

July 24th, 2011, 08:29 PM	#12
furreal302 Regular 94 GT 13.95@100 Join Date: Jun 2011 Location: NY Posts: 435 iTrader: 2 reviews	I left the stock valve springs in it. I wish I knew how weak the springs are when I brought it to the machine shop. Maybe I'll do that over the winter. The car is running now and it runs great. I took it for a little drive and everything is working great. I got a code for the EGR so I have to get one of those things that fool the computer into thinking it's still there. The header that I had to modify with the ball peen hammer is leaking at the flange on the #8 cylinder where I had to dent it. Not so sure on what to do about that because pulling the header out with everything installed doesn't look like much fun.

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