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Budget 351W swap/build thread

This is a discussion on Budget 351W swap/build thread within the 94-95 Talk forums, part of the 94-95 Tech category; Summit is high on a few things but over all have great prices. They sell the Edelbrock Victor 5.8 for ...

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  #51 (permalink)  
Old 05-26-09, 08:20 AM
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Summit is high on a few things but over all have great prices. They sell the Edelbrock Victor 5.8 for $534
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  #52 (permalink)  
Old 10-26-09, 02:48 AM
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What ever happened to this? Still doing the 351 or??
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  #53 (permalink)  
Old 10-26-09, 06:07 PM
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Yes, slow but it's gonna happen. Probably drop her in income tax time, this way I can finish it properly.
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  #54 (permalink)  
Old 10-27-09, 07:12 PM
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I'm doing a Very similar swap but mines a 392c.i that I'm pulling from my Bronco, not doing the EFI but rather going Carb, less issues and less money over all. I'm trying some new lines of thinking for this swap and will start a Thread at some point.
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  #55 (permalink)  
Old 10-28-09, 07:46 AM
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Originally Posted by HcaSn95 View Post
I'm doing a Very similar swap but mines a 392c.i that I'm pulling from my Bronco, not doing the EFI but rather going Carb, less issues and less money over all. I'm trying some new lines of thinking for this swap and will start a Thread at some point.
whatcha doin about the fuel pressure problem?

sorry to take it
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  #56 (permalink)  
Old 10-28-09, 10:19 AM
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When I start the Thread I'll throw up all my ideas, lets just say The stock pump is going away and a standard fuel pickup and sock is going in and still using the stock sending unit.
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  #57 (permalink)  
Old 11-02-09, 10:31 PM
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Originally Posted by The_Mustang View Post
Yes, slow but it's gonna happen. Probably drop her in income tax time, this way I can finish it properly.
If you don't have the elbow for the intake, I have one. I sold my car so I'm not going to use it. The P.O. chopped the EGR mount off but some material could easily be welded back on, if needed.

$50, shipped. PM me if you want it.
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  #58 (permalink)  
Old 11-02-09, 10:34 PM
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Originally Posted by HcaSn95 View Post
When I start the Thread I'll throw up all my ideas, lets just say The stock pump is going away and a standard fuel pickup and sock is going in and still using the stock sending unit.
I actually did that when I put a carb'ed 5.0 into a Merkur XR4ti. Works great! Used a Holley "Red" pump.

I hope I didn't "goober" your secret.
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  #59 (permalink)  
Old 11-03-09, 06:45 PM
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I actually did that when I put a carb'ed 5.0 into a Merkur XR4ti. Works great! Used a Holley "Red" pump.

I hope I didn't "goober" your secret.

No you didn't I'm going to be using the Fuel return Line as well so I will let the pump push well over the Regulator and the 2nd out line from the Regulator will feed back to the Tank. I think the Red pump Regulator can be used that way as well. But I will take pics and Start a Thread that Way I don't highjack His
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  #60 (permalink)  
Old 11-16-09, 08:40 PM
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Ok everyone, riddle me this: If I build a 351 with E7's and GT40/Typhoon intake, it's going to make at least a little more power than a 302, correct? So if I plan to boost it with about 15 psi, I should have a pretty fun, reliable combo, correct? If I'm not looking to have more than say....450rwhp, then I'd be good to go...at least in my way of thinking.

For every dollar I save on the 351 swap, I can apply that to a blower. Just thinking out loud.
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  #61 (permalink)  
Old 11-16-09, 10:46 PM
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I would think the E7's, even ported, would be too restrictive:shrugg:

A set of GT-40's, I think, would be a better choice.
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  #62 (permalink)  
Old 11-17-09, 07:31 AM
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will it make more power than a 302? no doubt about it

will it make as much power NA as a hotrod 347? not even close

will it lose power NA in the upper rpm range? you bet

would gt-40s be worth it if you could find them cheap? i think so

with a blower at 15 psi, will it kick some serious butt and still be reliable? damn straight

would i go that route? sure, and i'd plan on upgrading the heads as funds became available

the more i think about what i did and everything i would do differently if i were doing it again, the more i like the idea of a lower compression engine with a blower. with a combo like that, cruising around town, it would have stock like drivability, have decent mpg, and i could use low octane gas, but when i opened it up, it would pull really hard until i decided to let up. and after all, you still have more cubes than a 347 and a block that is much stronger. after you upgrade the heads, intake and exhaust, those 347 boys won't be able to touch you

Last edited by BlackVert; 11-17-09 at 09:16 AM.
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  #63 (permalink)  
Old 11-17-09, 06:37 PM
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Heres a link to my 351w build The_Mustang i've read all of your thread so far and if it was me to do again i would buy what you want to be happy with!Like you saying you where going to order or did but it fell threw with that POS typhon intake.I would go with the TFS or go and get a GT40 lightning intake.As far as your post with doing E7's on it with a typhon intake and boost,your gonna barley make more power over the same set up on a 302.A 351 is only 49 more cubic inches then a 302, that little amount of cubes isn't going to make that much difference! Epically if you take 351w heads off and put on tiny E7 302 heads! BlackVert i disagree with your last post,i doubt he'll kick the **** out of 347's with a 351w E7's typhon intake and S/C. My 351w 40 over made at the wheels 319/339 on a mustang dyno because of the small cam i f'd up and put in it. My motor also has 8.1 compression.My 351 build with pics peace
















john

Last edited by SMOKEDYA; 11-17-09 at 06:40 PM.
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  #64 (permalink)  
Old 11-17-09, 06:44 PM
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arent 351w heads really just 302 heads? The only 351w heads i've read that are worth a damn are the old D00E heads or whatever they are called. Even lightnings only got the gt40 heads....which are the same as what the cobra and explorer got.

For how cheap you can find gt40p heads, i say get those over e7s.



And one thing to remember, a stock rotating assembly from a 351w is going to be heavy. So even if you make more power, you could still be slower than a 302. Not saying i wouldnt go with a 351....just something to keep in mind.
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  #65 (permalink)  
Old 11-17-09, 08:56 PM
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Quote:
Originally Posted by SMOKEDYA View Post
.A 351 is only 49 more cubic inches then a 302, that little amount of cubes isn't going to make that much difference!
That's probably the funniest thing I've read in a while! If that statement had any merit whatsoever, all these companies selling stroker kits would go out of business! There's no replacement for displacement. Think of a cylinder as a syringe and the intake port as the needle. If you replace the syringe with a larger one and leave the port(needle) the same, and give it the exact same pull, it's GOING to pull more volume in, physics says it must.

The point of a 351 was never about more power...maybe in the future but....having had a s/c'd 302 car and the power level being almost block splitting, I feared it more than I enjoyed it. Constantly worrying witch time I nailed it was going to be the last.

And since my motor is about ready to sign off anyway, I'm going to have to replace it. So I figure I could just replace it with a stock 351 and have a much stronger engine. Once it's in the car and everything is all set up, then I can start bolting on the goodies, but in the mean time I'll have a nice, reliable replacement engine. While it may not make much more power than a 302, I have a hunch that I'll gain quite a bit of torque, if nothing else.
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  #66 (permalink)  
Old 11-18-09, 07:38 AM
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Originally Posted by SMOKEDYA View Post
...
BlackVert i disagree with your last post,i doubt he'll kick the **** out of 347's with a 351w E7's typhon intake and S/C.
...
if you read my post again, you will (hopefully) notice that i didn't say this.

did i compare that setup with E7 heads to a 347? no

what did i say? "will it kick some serious butt and still be reliable?"

how did i answer my question? "damn straight" (meaning that i think it will)

did i compare the same theoretical 351 WITH UPGRADED HEADS and the SC to a 347? yes

sure, getting the best intake you can is a good idea, but let's remember that this is a budget build. let's also remember that forcing air through the intake has a tendency to lessen the differences between a good flowing NA intake and a poor flowing one.
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  #67 (permalink)  
Old 11-18-09, 07:54 AM
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Think of a cylinder as a syringe and the intake port as the needle. If you replace the syringe with a larger one and leave the port(needle) the same, and give it the exact same pull, it's GOING to pull more volume in, physics says it must.
the complication here is that, sure, given enough time, it will draw in more air, but with the needle only being open for a certain amount of time, there is a limit to how much air will go through it during that time

then again, with a larger syringe, the vacuum that is created is stronger, so it should still draw in more air in the same amount of time than a smaller syringe would

now if you are forcing air through needle from the other side at the same time ...

Last edited by BlackVert; 11-18-09 at 10:59 AM.
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  #68 (permalink)  
Old 11-18-09, 08:07 AM
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let's also remember that forcing air through the intake has a tendency to lessen the differences between a good flowing NA intake and a poor flowing one.
This is exactly what I was thinking when I decided to build my 351 this way. Just look at the S351. It's intake wasn't anything special (a Cobra intake with a saleen plaque?) and it had....that's right, 302 heads(eddy performers). But it still managed to make in excess of 500 HP.

I'm gonna try it and if I am unhappy with the results I'll come on here and proclaim all the nay sayers... MASTER!
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  #69 (permalink)  
Old 11-18-09, 08:28 AM
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At the end of the day, look at NA lightnings....they had gt40 heads on their 351. An e7 will make less HP.

But blown, you'll be able to make more HP then your car can handle. So build the foundation like u had been planning.
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  #70 (permalink)  
Old 11-18-09, 10:28 AM
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Originally Posted by The_Mustang View Post
That's probably the funniest thing I've read in a while! If that statement had any merit whatsoever, all these companies selling stroker kits would go out of business! There's no replacement for displacement. Think of a cylinder as a syringe and the intake port as the needle. If you replace the syringe with a larger one and leave the port(needle) the same, and give it the exact same pull, it's GOING to pull more volume in, physics says it must.

The point of a 351 was never about more power...maybe in the future but....having had a s/c'd 302 car and the power level being almost block splitting, I feared it more than I enjoyed it. Constantly worrying witch time I nailed it was going to be the last.

And since my motor is about ready to sign off anyway, I'm going to have to replace it. So I figure I could just replace it with a stock 351 and have a much stronger engine. Once it's in the car and everything is all set up, then I can start bolting on the goodies, but in the mean time I'll have a nice, reliable replacement engine. While it may not make much more power than a 302, I have a hunch that I'll gain quite a bit of torque, if nothing else.
what i ment by my cubes answer is,if you put 302 heads on a 351 you just restricted those cubes.if you leave the 351 heads then yes it will work out good.I looked at the stock heads off my 351 when i tore it apart and they were the same size as my GT40P's i had on my 302.If you take time and look hard enough a lighting intake can be had for cheap and is the same intake that is on the s351's/cobras, it's the GT40intake.peace











john
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  #71 (permalink)  
Old 11-18-09, 10:45 AM
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Originally Posted by BlackVert View Post
will it make more power than a 302? no doubt about it

will it make as much power NA as a hotrod 347? not even close

will it lose power NA in the upper rpm range? you bet

would gt-40s be worth it if you could find them cheap? i think so

with a blower at 15 psi, will it kick some serious butt and still be reliable? damn straight

would i go that route? sure, and i'd plan on upgrading the heads as funds became available

the more i think about what i did and everything i would do differently if i were doing it again, the more i like the idea of a lower compression engine with a blower. with a combo like that, cruising around town, it would have stock like drivability, have decent mpg, and i could use low octane gas, but when i opened it up, it would pull really hard until i decided to let up. and after all, you still have more cubes than a 347 and a block that is much stronger. after you upgrade the heads, intake and exhaust, those 347 boys won't be able to touch you
Correction accepted. I just dont want him to build something and make the same mistakes i made when i did my 351. What i should of done was install a larger cam,and flat top pistons.IF anything at the time a bigger cam! Yeah i have a 360 with H/C/I but theres quite a few 331,347's and SOME 302's making CLOSE TO the numbers i'm making cause of my poor dessions. peace












john
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  #72 (permalink)  
Old 11-18-09, 10:57 AM
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Correction accepted. ... peace


i made more than a few mistakes on my build. some of them were really expensive mistakes too
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  #73 (permalink)  
Old 11-18-09, 11:38 AM
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I junked the heads that came off my 351W. The motor was from a 94 F150 and the ports were exactly like the E7 that are on my car now. I had a set of GT40's sitting right next to them for comparison and there was no comparison. Besides, about 4 intake bolts broke off in those heads so I said to hell with that!

I would really like to install a set of aluminums though due to the weight savings.
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  #74 (permalink)  
Old 11-18-09, 11:55 AM
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Maybe I'll get a set of these: Edelbrock 5023 - Edelbrock E-Street Cylinder Heads - Overview - SummitRacing.com

It's nice to see Edelbrock fighting back against the japanese knock offs and offerin something American made for the same price. You know they probably don't make a lot of money selling these.
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  #75 (permalink)  
Old 11-18-09, 02:50 PM
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I junked the heads that came off my 351W. The motor was from a 94 F150 and the ports were exactly like the E7 that are on my car now. I had a set of GT40's sitting right next to them for comparison and there was no comparison. Besides, about 4 intake bolts broke off in those heads so I said to hell with that!

I would really like to install a set of aluminums though due to the weight savings.
do you still have those gt40s? if so, why not use them?

that's $900+ you could save ...
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