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1994-1995 5.0 Mustang SN95 Tech Forum

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Unread 09-19-2011   #1 (permalink)
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Default sn95 351w build

I am planning on putting my 351w in a 95 mustang come spring. The motor was built and installed in my truck so I pulled the motor out today and swapped in a stock 351w to sell the truck. The engine was rebuilt back in 96 but it still only has 50k miles on it. The engine is bored 30 over, it has aluminum SVO x305 heads with 58cc chambers, crank has been turned with 10 over bearings, it has a cam in it now but I wanna do a roller cam. It also had new trw piston installed at that time. It also has a 650 edelbrock carb with highrise intake which is coming off for fuel injection. My questions are.
1. I have been looking at intake and found a "Typhoon" intake for a 5.8 on eBay for around $450. Is that a waste of money or is that a decent intake?
2. I want a aggressive lope at idle but don't wanna go to extreme. Any recommendations on type of cam? Also what's a good deal on a set of roller rockets and what would work well?
3. What kind of compression should I run? The guy that built the engine said i should have the block to get the compression I need?? Maybe new set of pistons? Not gonna be doing any nitrous BTW.
4. Should I have the heads messaged? Not sure the flow numbers. They advertised 65 HP gain over a Gt40 head I believe.
5. What size injector am I gonna need to run?
6. How much HP should this dude make!?
When it was in my 82 3/4 ton 4x4 with a c6, snowplow mount and hoop still on the truck I ran right with a duramax diesel 6 speed with a 125hp bullydog tuner on max setting!!! So he should have been making around 425 HP and probably 700-800 ftlbs!! I was pretty happy!
Thanks in advance!
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Unread 09-19-2011   #2 (permalink)
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Welcome to AFM!

1. A Typhoon intake is okay, they are China made Edelbrock copies. They usually need some porting/cleaning up to get them to flow where they should. I would get different intake, I think $425 is a little steep.
2. The way a camshaft idles is one of the many factors that goes into selecting a camshaft. There are a few guys that can make you a really good custom cam, it isn't nearly as expensive as you might think. As far as off the shelf cams, Lunati and Comp would probably be able to recommend a good one for your setup. Speaking of valvetrain, do you already have roller rockers? If you don't, plan on getting them. Also, the current valve springs may not be up to the task of a different camshaft, be sure to check that out before finding out the hard way. As for hydraulic roller lifters, these are the best bang (er... not bang... bad term here ) for the buck:

Howards Cams 91168 - Howards Cams Street Series Retrofit Hydraulic Roller Lifters - Overview - SummitRacing.com

3. Assuming the pistons the motor has are flat top pistons, you're probably around 10:1 to 10.5:1 static compression ratio. This isn't too high, pump premium will work fine with a good cam. If you do get a different camshaft though, you need to pop off the heads (well, at least one) and check piston-valve clearance. Another thing that's really sucks finding out the hard way.
4. A quality port job will probably help those heads out.... I would.
5. Injectors: Put it together with the stock 19# injectors. When they prove themselves inadequate (which they probably will) decide from there. It should run fine with the ones off the 5.0. If/when you get heavier injectors, you will most likely have to get a better fuel pump.
6. I'm not 100% familiar with those heads (I don't think so anyway), so I can't really make a good guess. But if I were to... If everything gets done right I could see 365HP.

I hope this helps, and good luck!
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Unread 09-19-2011   #3 (permalink)
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$450 is what a Typhoon costs NEW, plus it's made in China. You can get a good used Edelbrock for that price, and it'll be American made. I personally wouldn't go for the Typhoon. You'll have to add in the cost of cleaning it up.

For the cam, forget about it until you decide on every single other thing for the engine combination first because it depends on that.
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Unread 09-20-2011   #4 (permalink)
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Ok thanks! I have never built an engine before by myself so I am looking forward to it bit also wanna make sure its done right!
I saw a Gt40 5.8 lower on eBay but I wouldn't be gaining anything right? From what I have been reading the stock 5.0 upper will restrict the 5.8. So I will probably go with a trick flow or something. Any other tips would be greatly appreciated!
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Unread 09-20-2011   #5 (permalink)
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GT40 351W lowers have gotten stupid expensive, mainly because the only cars to come with them were '95 Cobras and 1st gen Lightnings. But yes, in stock from there are definitely intakes that flow better. I plan on using a Edelbrock Victor EFI on my 408W build, but it may not agree with your combo.

What headers do you plan on using?
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Unread 09-20-2011   #6 (permalink)
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Haven't really dug there much yet. I read somewhere that kooks makes a set of long tubes. So probably go that route. Got any tips on that?
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Unread 09-20-2011   #7 (permalink)
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To my knowledge, and I have done quite a bit of digging, no one makes an off the shelf long tube header that will work for an SN95 351W swap. Hooker does make these (shorties) that are made for a 351 SN95:

5.8L/351 - Headers - Exhaust - MUSTANG - FORD - 1995 - SummitRacing.com

I plan on having Accufab making a pair of LTs for my 408W build. The heads I plan on using need custom headers anyway. If I recall correctly, they run ~$700/pair.
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Unread 09-21-2011   #8 (permalink)
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I have the Non Ceramic versions of those from when I did my 351 swap. Work great, and have a 3" collector. Get those.
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Unread 09-21-2011   #9 (permalink)
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Quote:
Originally Posted by good'ole302 View Post
I have the Non Ceramic versions of those from when I did my 351 swap. Work great, and have a 3" collector. Get those.
Nice to hear from someone who has actually used them
Thanks for the report
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Unread 09-22-2011   #10 (permalink)
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Those are def. Cheap enough too! Thanks! Some fog is starting to clear! Lol
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Unread 09-23-2011   #11 (permalink)
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Will the oil pan and pump off the 5.0 work on the 5.8?
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Quote:
Originally Posted by gbaileyo7 View Post
Will the oil pan and pump off the 5.0 work on the 5.8?
I know the pans are different, I'm not entirely sure about the pumps. I think they are different as well.
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Unread 09-24-2011   #13 (permalink)
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Do u know if there is a kit that has the oil pan, pump, balancer, flywheel etc.
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Unread 09-25-2011   #14 (permalink)
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Yep, here is the pan and pickup kit that will work:

Ford Racing M-6675-A58 - Ford Racing Oil Pans - Overview - SummitRacing.com

This is the pump will work for you:

Ford Racing M-6675-A58 - Ford Racing Oil Pans - Overview - SummitRacing.com

You could get a high volume pump, but you don't have any reason to.

One of these balancers will work for you:
Four - External, 28 oz. imbalance - Harmonic Balancers - 5.8L/351 - Harmonic Balancers - Engines & Components - MUSTANG - FORD - 1995 - SummitRacing.com

This is probably your most economical option for a flywheel:

Ford Racing M-6375-A302B - Ford Racing Flywheels - Overview - SummitRacing.com
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Unread 09-25-2011   #15 (permalink)
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I have a flywheel from a 83 f-250 351w. Will that work? Also I was talking to a guy that told me if my engine came out of a 4x4 that I wouldn't need a different pan. You ever have any experience with that?
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