Have a 351 modified in my 2wd 79' F100 that I'll be turning into a 400 shortly, until then I'll be putting a carb and intake on to up the performance a little. What are your suggestions? When I rebuild to the 400 I'll be somewhere in the 325hp area if that helps.

 

IMO just wait till you do the rebuild.

This is in your ball park power wise, uses Weiand intake:

https://www.dropbox.com/s/06d37v7d9v...ular%20Kit.xls

Pretty sure it's this one:


http://www.summitracing.com/parts/wn...view/make/ford

 

I'm not sure the Weiand 8010 is an option at the moment. I bought one a couple of months ago via Tim Meyer and he had it drop-shipped to me. Turns out it is a completely different design than the ones previously available - so much so that it cannot be used since it overlaps the thermostat housing's space. In other words, you have your choice of running an intake manifold or a thermostat housing, but not both. Looking it over I discovered it said "China" on the bottom whereas the previous ones were made in the USA, so somehow when they shifted production to China they also changed the design to one that cannot be used. Tim was appalled and bought up all the US-made ones he could get his hands on, so he's the one to go to if you want a Weiand as anyone else that has an 8010 almost certainly has one that was made in China.

If the Weiand isn't an option I would go with the Edelbrock Performer 400. I'm running one on Rusty and it works fine, although Tim says the Weiand does a bit better. However, I think I agree that you won't gain a lot on a stock, and probably worn, M by adding the manifold and 4bbl. There are two performance problems with the M - low compression and restarted cam timing. And those prevent the engine from winding up enough to really need a larger carb.

 

Thanks guys, the TMeyer kit is the one I will be doing on my motor also. I'll call up Tim and see what he has available on the older style weiand intakes. If I won't gain anything by just adding those two things then I'll just do the rebuild up all at one time with it. Thanks again, Andy.

 

Ask Tim what gains you would get with the intake and 4bbl. He will tell you the truth and will not try to sell you on something you don't need. I know that for sure as he talked me out of several things saying there wouldn't be much gain for the cost.

 

It depends on the entire build of course, but ANY carb with 600CFM or more, and ANY 4-barrel intake will get you to 325.

 

My neighbor has an older Edelbrock performer 400 he said I could try and buy if I liked it

 

That's exactly what I'm running in Rusty. Put an Eddy 1406 on top and you'll get good, crisp throttle action. Change the jetting to slightly leaner as I've done and you'll pick up a bit in MPG.

 

.
. I'd go 750 CFM Holley... can usually find nice used ones for about $150 all over swaps... or anything you stumble across from 650 - 750 CFM... you'll need it for the 400... and it will work fine on the 351M in the meantime... but won't give you 325 HP on the 351M, LOL!... maybe 175 HP...

 

I just recently did the same swap on my 351m, I went with the Edelbrock 2171 intake and the Edelbrock 750 cfm. Both non EGR. Also, make sure and get a fuel pressure regulator, I read that on here and glad I did. Factory fuel pump puts out more pressure that the 6psi that Edelbrock suggests for the carb. It really opened the truck up and runs tons better. Gas mileage went down the tubes, but its a weekender for me so not an issue.

 

Which fuel pressure regulator are you running?

 

BuzzLOL,

I wasn't trying to say that JUST a carb and intake would get someone to 325HP, but that any intake you'd buy today and any 600+ CFM carb should be capable of supporting 325 HP!

 

If I use a motorcraft 4 barrell on my engine build, would I need a pressure regulator also? I've put an edelbrock performer on my 351 and I picked up a d3zf ac carb that I plan to run. Its a mechanical secondary and I was wondering if anyone has any info they can give me on it. Like which port to use for the distributor advance? What application was this carb originally for? What cfm is it?

 

The Motorcraft carbs don't need the pressure regulator. As for the size of that carb, Google it. I got several hits and a bit of reading might find the spec's.

 

I went with a Holley pressure regulator. I found it on Summit when buying the rest of the parts. It was really reasonably priced as well