5.0 Questions
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From: Mooresville, NC
5.0 Questions
Hey all, its me again. I starting tearing down my salvage yard 5.0 today (going to swap into my 1994 f150 sb 2wd). Its a tired roller 5.0 (out of a 94 truck supposedly) with 166,000 miles but everything I've seen so far looks pretty good, normal wear. 3 questions for now (you all have answered a bunch already and I know there will be more)
1. Is there anyway to identify whether or not this engine had mass air? I dont have the intake piping from the air filter to intake where I believe the mass air sensor would have been.
2. Since I'm doing a cam change and this truck is going to be a 'fun' truck for me and my kid should I even worry about setting up mass air?
3. Is it a good bet it has the E7 heads? How do I tell? I did a search and didnt come up with anything. Whats generally more cost effective, getting GT40 heads or having the stock heads reworked?
The flow charts that Conanski posted in the other thread were very telling!
I guess thats really about 6 questions but thanks anyway. I would be struggling without this site...
Craig
1. Is there anyway to identify whether or not this engine had mass air? I dont have the intake piping from the air filter to intake where I believe the mass air sensor would have been.
2. Since I'm doing a cam change and this truck is going to be a 'fun' truck for me and my kid should I even worry about setting up mass air?
3. Is it a good bet it has the E7 heads? How do I tell? I did a search and didnt come up with anything. Whats generally more cost effective, getting GT40 heads or having the stock heads reworked?
The flow charts that Conanski posted in the other thread were very telling!
I guess thats really about 6 questions but thanks anyway. I would be struggling without this site...
Craig
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Joined: Jun 2006
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From: Ottawa, Ontario
Originally Posted by Hillcapper
1. Is there anyway to identify whether or not this engine had mass air? I dont have the intake piping from the air filter to intake where I believe the mass air sensor would have been.
Originally Posted by Hillcapper
2. Since I'm doing a cam change and this truck is going to be a 'fun' truck for me and my kid should I even worry about setting up mass air?
Originally Posted by Hillcapper
3. Is it a good bet it has the E7 heads? How do I tell? I did a search and didnt come up with anything. Whats generally more cost effective, getting GT40 heads or having the stock heads reworked?
P.S. Be aware the more you make the motor flow with head work and high flow intakes the further up the powerband moves, so be prepared to re-gear to compensate. The stock 5.0 doesn't have much low end grunt(below 2500rpm) and high flow components soften that even further.
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From: Mooresville, NC
Thanks Paul, going to keep this 302 fairly mild (hopefully 300 hp though). I still have to get a computer and engine wiring harness.
I think I'll go with SD, so do I have to be sure and get an SD computer (is there a difference in computers) and harness off of a donor truck?
You have a cam recommendation for this engine and SD? We want to stay w/ standard injectors. Are 1.7 rockers worth the investment?
I would love to port the heads myself and I understand the concept. I've rebuilt engines in the past (big diesels) but have never tried porting and polishing. Any good links for general instructions?
Figure on regearing anyway, currently running a 2.73.
Thanks again.
I think I'll go with SD, so do I have to be sure and get an SD computer (is there a difference in computers) and harness off of a donor truck?
You have a cam recommendation for this engine and SD? We want to stay w/ standard injectors. Are 1.7 rockers worth the investment?
I would love to port the heads myself and I understand the concept. I've rebuilt engines in the past (big diesels) but have never tried porting and polishing. Any good links for general instructions?
Figure on regearing anyway, currently running a 2.73.
Thanks again.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Originally Posted by Hillcapper
I think I'll go with SD, so do I have to be sure and get an SD computer (is there a difference in computers) and harness off of a donor truck?.
Originally Posted by Hillcapper
You have a cam recommendation for this engine and SD? We want to stay w/ standard injectors. Are 1.7 rockers worth the investment?.
Originally Posted by Hillcapper
I would love to port the heads myself and I understand the concept. I've rebuilt engines in the past (big diesels) but have never tried porting and polishing. Any good links for general instructions?.
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Senior User
Joined: Jan 2008
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From: Mooresville, NC
Does that cam choice change with SD or Mass Air or would you do the same cam either way?
What ratio are the stock rockers? Does going to 1.6 mean new rockers?
HEMIEATER - got anything for me on porting E7's?
I will google it also.
Thanks all
What ratio are the stock rockers? Does going to 1.6 mean new rockers?
HEMIEATER - got anything for me on porting E7's?
I will google it also.
Thanks all
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
Originally Posted by Conanski
Get a small mirror and look under the heads(assuming they are still on the motor) near the central intake ports, that's where the casting number is. It's a very good chance you have the E7 heads.
FTE Legend
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From: Ottawa, Ontario
Originally Posted by Hillcapper
Does that cam choice change with SD or Mass Air or would you do the same cam either way?
Originally Posted by Hillcapper
What ratio are the stock rockers? Does going to 1.6 mean new rockers?
BTW.. if you are rebuilding the bottom end select pistons for 9.5:1 or so compression ratio, this will do wonders for the TQ curve.
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From: Mooresville, NC
Thanks Paul, your a great help. I'm going with your suggestions. I'm looking at a rebuild kit from Summit with pistions in that range. Thanks baddad for clearing up the head id question. Looks like I do have E7's.
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Sorry I got carried away..
be careful on those kits... I bought one and it came with the shortest compression heigth pistons they make .. it's like 1.5??? They will drop the compression a bunch, I had to buy different pistons so the price went up... either get some 5.0HO forged pistons or some speed pro, TRW H273CP they have huge valve reliefs but they have a 1.608 compression heigth... don't hold me on the heigth numbers can't remember....
I use the 5.0HO forged pistons in my truck they have the highest compresion height of them all... the piston will end up at 0 deck or close to it... The is the piston right at the top of the block... the pistons in those kits will put the piston way down the hole, not good. Just keep this in mind... the closer you get the piston to the head the more compression you can run with out having to use high octane fuel..
All the 302s I have built for performance the piston stick .010 to .015 out of the hole..
this is a motor I built for a 740volvo I was running H273CP pistons .010 above the deck... with a .041 gasket that put the piston .031 from the head. You don't have to go as far as I did (having the block decked) but you can at least get it to the top of the block by just getting the HO pistons...
something to think about..
be careful on those kits... I bought one and it came with the shortest compression heigth pistons they make .. it's like 1.5??? They will drop the compression a bunch, I had to buy different pistons so the price went up... either get some 5.0HO forged pistons or some speed pro, TRW H273CP they have huge valve reliefs but they have a 1.608 compression heigth... don't hold me on the heigth numbers can't remember....
I use the 5.0HO forged pistons in my truck they have the highest compresion height of them all... the piston will end up at 0 deck or close to it... The is the piston right at the top of the block... the pistons in those kits will put the piston way down the hole, not good. Just keep this in mind... the closer you get the piston to the head the more compression you can run with out having to use high octane fuel..
All the 302s I have built for performance the piston stick .010 to .015 out of the hole..
this is a motor I built for a 740volvo I was running H273CP pistons .010 above the deck... with a .041 gasket that put the piston .031 from the head. You don't have to go as far as I did (having the block decked) but you can at least get it to the top of the block by just getting the HO pistons...
something to think about..
Postmaster
Joined: Jun 2005
Posts: 2,656
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Originally Posted by Hillcapper
Does that cam choice change with SD or Mass Air or would you do the same cam either way?
What ratio are the stock rockers? Does going to 1.6 mean new rockers?
HEMIEATER - got anything for me on porting E7's?
I will google it also.
Thanks all
What ratio are the stock rockers? Does going to 1.6 mean new rockers?
HEMIEATER - got anything for me on porting E7's?
I will google it also.
Thanks all
here is a good site...
http://www.diyporting.com/E7p2.html
main thing.. leave the floors alone no need in making the turn down into the cylinder any sharper, just widen them and raise the roof.. blend the bowls in
and your in good shape.. I have done a bunch of heads and it takes a lot of time... so if I was you... and I'm not...lol i would just do the exhaust side. If after you are done and you feel up to it then do the intake.
My porting pics. click here..
here's a pic of the intake floor before... check out the sharp edges from where they machined the bowls..
after a little work
It's got to help...
Then I would install 1.9 and 1.6 valves... I had the machine shop just cut the exhaust valves without installing hardened seat. He said when he was done he was still into the factory hardness and I've been running them a while now... no prblems...
pics after he cut the seats and bowls... and a little exhaust work...
after I blened the intake bowl... it was easy, that bowl cutter my machinist has is awesome... makes it easy...
Exhaust exit... smaller than the header...
Good luck...
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From: Mooresville, NC
Good point on piston height, compression ratio and octane level. I would definitely like to be able to run regular unleaded. When a piston manufacturer lists 'compression distance' is this what I should be looking for. The ones I'm looking at are Speed Pro ZH273CP30 and compression distance is 1.605. Compression ration 9.08:1.
Sound right? Regular unleaded?
Thanks
Sound right? Regular unleaded?
Thanks
FTE Legend
Joined: Jun 2006
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From: Ottawa, Ontario
Originally Posted by Hillcapper
The ones I'm looking at are Speed Pro ZH273CP30 and compression distance is 1.605. Compression ration 9.08:1.
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From: Mooresville, NC
I plan on going with E7 heads ported (maybe GT40's but price must be right) and hopefully stock bore (hasnt been to machine shop yet). I didnt think about head gasket thickness. I was planning on buying a Federal Mogul rebuild kit from Summit (the pistons would be in the kit). It comes with a engine gasket set - Sealed Power R2601445. I couldnt find any details on the head gasket.
??
??