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Author
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Topic: So!! I want to build a motor???
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69maverick
Gearhead Posts: 323
From: Thomaston,CT.
Registered: Jan 2001
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posted 06-15-2001 01:37 PM
   
Ok guys I want to build a new motor for the 68 stang! It has a 302 but I'm open to the Idea of a 351w I have a new Cam kit,Roller tip rockers,289 performer intake and a holley 650 double.MSD Ignition,The tranny is a C4 I have a 2500 stall converter the rear is a 4:11 posi. This will be a street motor Not just a quarter mile car!! I want to be able to use 93-94 octang gas! So my question are what block and heads should I start out with?
I would like to see 325+ hp I'm thinking World products JR heads Cost 800+ ? And a late model 5.0 block? I would like to spend no more than 1800 remember I already have the Cam,springs,rockers,timing chain,Intake and carb! The 302 in the car now is already .040 over now! I've been told by my local motor guy not to go .060 over on the street! I don't know if I missed something Buts lets hear some suggestions!
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SG236
Gearhead Posts: 162
From: Jasper, TN, USA
Registered: Dec 2000
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posted 06-15-2001 03:02 PM
For that kind of horsepower ~325 I would think you could get the stock heads worked for a lot less to save you some bucks.
Good Luck,
------------------
Russ Hood
70s Maverick S/Pro
https://mustangsandmore.com/ubb/SG236.html
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capri man
Gearhead Posts: 364
From: doerun, ga.
Registered: Nov 2000
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posted 06-15-2001 03:19 PM
you might want to think about the gt40-p ford heads. you can buy them complete for about $500. they work great right out of the box but with a little work they can become awesome. my combo is very similar to yours and i figure i have 340+ hp.
good luck---mike r----capri man7.60 1/8
@88 mph
1.65 60 ft.
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69maverick
Gearhead Posts: 323
From: Thomaston,CT.
Registered: Jan 2001
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posted 06-15-2001 03:37 PM
I just had a guy call me with a 92 5.0 with 54,000 on it. Out of a rearend wreck! He says it is a GT. Is this a GT-40 headed motor? He wants 550.oo for it!!Thanks for the replys keep um coming!
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capri man
Gearhead Posts: 364
From: doerun, ga.
Registered: Nov 2000
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posted 06-15-2001 05:23 PM
the gt40-p heads came on 1998 (i think) and newer 302 engines. they are availiable at any ford motorsports dealer. if you are lucky you might find a set in the junkyard. keep in mind any headers that you have now may not work on these heads because of the plug placement.
good luck mike r---capri manps. www.motorcitymustangs.com has a great article on these heads.
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Gary Ferringer
Journeyman Posts: 28
From: Kennerdell,Pa.
Registered: Feb 2001
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posted 06-15-2001 05:31 PM
Go with the GT-40P's like Mike said. They are excellant for what you are trying to do,especially if you want to run pump gas,and have that tight of a convertor.The '92 GT heads are not the same. The newer Explorers with the 302 came with them, among other applications. Your best bet is to buy a new set from some of the vendors that supply them. Mike got his at Racer Walsh, which is a company that I am not real fond of, but they shouldn't botch a sale of common V8 heads too badly. ALSO, these aren't just GT -40 heads, that "P" is very significant. These are a totally different head. The only snag that I see is with header selection. The spark plug locations are different,and standard headers won't fit. I think that Mike went with a shorty header of some type. As far as going .060 over on the street,Why Not? as long as the block has enough meat in the cylinder walls (and some don't) I can't see why not. We had a Granada once that was a work vehicle that was .060 over,with no problems. BUT, you will want to get them checked out first. ------------------
'85 Capri
Cleveland powered 6.95 1/8th @94 1/2 MPH
1.49 60 ft. [This message has been edited by Gary Ferringer (edited 06-15-2001).]
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69maverick
Gearhead Posts: 323
From: Thomaston,CT.
Registered: Jan 2001
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posted 06-16-2001 07:53 AM
Great info guys! I was only going by what the motor builder was telling me on the .060
Was the granada a 302? do know what year block it was?
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jdsgallops
Gearhead Posts: 125
From: Green Bay, WI
Registered: Feb 2001
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posted 06-17-2001 09:52 AM
Maverick what are the specs on the cam you have? The problem I see so far is the performer 289 intake. To get about 325hp out of a 302 you are going to need a 6000rpm or so shift point. That is a little out of the performer range. An rpm or stealth would be a better choice.
Here are the specs on the used engine I just bought. The gentleman I bought it from had it dynoed at 272 RWHP. That is about 320 FWHP.
Stock bottom end with forged TRW's
Motorsprt cam 224/234 496/520 112 lobe center, This is basicly a performer RPM cam.
Bowl blended gt-40 heads(not P)
Weind stealth intake
holley 650 dbl pump
mac long tube headers and h-pipe w/ flowmaster mufflers.
MSD dizzy and boxI am putting a vic jr on this combo and have added a 7 qt canton oil pan, so I am hoping for a little more power than what he got. His dyno numbers were with a factory dizzy setup and was producing a lot of spark scatter at higher rpms. This should give you an idea about what parts combo you need.
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69maverick
Gearhead Posts: 323
From: Thomaston,CT.
Registered: Jan 2001
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posted 06-18-2001 07:31 AM
jdsgallops: The cam specs are about the same except it .499 lift and 108 LC. I have a Wieand excelerator single plane but I lost some bottom end with it! It would work better with a stick!
Tell me about "Bowl blended gt-40 heads"
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jdsgallops
Gearhead Posts: 125
From: Green Bay, WI
Registered: Feb 2001
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posted 06-18-2001 09:17 AM
I have heard good things about the excellerator intake. You are probably loosing torque with your current combo because of a parts mismatch. Sean Meldrum, noted P head guru, uses the excellerator on his combo. He has good reports about it. He ran his 84gt to the tune of low 13's@105+ with 3.55 gears and a 5 speed.
A bowl blend is just what it sounds like. All sharp edges are blended in the area underneath the valve. This would basicly be a "stage 1" port job. A 10-20 cfm gain was probably had by this. I was told the heads flowed in the 200/150 range.
The article Mike posted was written my Sean Meldrum. He should have more info on his page about his setup. He also started the carbed mustang group. It is a bunch of good guys with a lot of great info. Guys with everything from all out race cars to stock daily drivers. If you would like to check it out go to http://groups.yahoo.com/group/carbedMustang
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Moneymaker
Administrator Posts: 8470
From: Lyons, IL, USA
Registered: May 99
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posted 06-18-2001 11:50 AM
325 HP from a 302 is a piece of cake. .060 on the street is fine.  ------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00 & '01
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link
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69maverick
Gearhead Posts: 323
From: Thomaston,CT.
Registered: Jan 2001
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posted 06-18-2001 03:49 PM
Thanks Alex I was wondering when you were going to jump in? Atleast I was hoping!! I just atlked to a different motor builder in the area and he agrees .060 is fine!Thanks for the Site jdsgallops. After carefull consideration I'm really leaning tward the 351w and down the road the world jr.heads
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JAAZZY
Gearhead Posts: 167
From: Bay Area, CA
Registered: Apr 2001
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posted 06-18-2001 04:04 PM
Go with the 351W! Just put a mild cam, intake and carb and you should have the hp you want. If I had a little moe room in my engine compartment(65) I would have done the same.
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cpmaverick
Moderator Posts: 875
From: Auburn, AL.
Registered: Jan 2000
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posted 06-18-2001 09:43 PM
hehe, you have more room than he does 
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JAAZZY
Gearhead Posts: 167
From: Bay Area, CA
Registered: Apr 2001
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posted 06-19-2001 12:29 AM
I do?! Whoops.  Don't know much about Mavericks but I can't even imagine getting a 351W with less room than I have.
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69maverick
Gearhead Posts: 323
From: Thomaston,CT.
Registered: Jan 2001
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posted 06-19-2001 06:14 AM
This is for my kids 68 stang! He has all the room in the world!! I'm Sticking to the 302
in the Mav.!!
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69maverick
Gearhead Posts: 323
From: Thomaston,CT.
Registered: Jan 2001
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posted 06-19-2001 06:22 AM
So to get to the point in the stang what do I need to have to make the change to the 351w?
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Moneymaker
Administrator Posts: 8470
From: Lyons, IL, USA
Registered: May 99
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posted 06-19-2001 12:02 PM
High dollar headers is about it. Otherwise it's a drop in. ------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00 & '01
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link
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69maverick
Gearhead Posts: 323
From: Thomaston,CT.
Registered: Jan 2001
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posted 06-19-2001 01:00 PM
Thanks alex I'm going to use the cam kit I bought from you in it! A 650 double with a air gap or the rpm intake?
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