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 Posted:5/29/2003 14:44 |
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I've tried to get advice on several other boards concering this topic. I'll try it hear in case there is a motorhead that can help me. This next winter I plan on making a 392 Stroker out of my 351W block. I know this can be done by using a 3.850 crank, stock rods, and 302 pistons. Oh yeah. I'll also be using 351M 2V(bigblock) heads and an intake adapter plate.
The 351M 2V heads double the breathing capacity of the motor as it's ports nearly double the size of the stock Windsor head. OK 'nuff background on the motor. Now the tough part and the part in which I need help. I want to Inject this bad boy. Does anyone know if the stock Ford TPI would flow the required airflow for the additional stroke and breathing of the heads? I want to cam this motor to make it's power in the 1000-3000rpm range so high rpm use is not an issue as it would be on a race engine. I don't know much about how the fuelie computers work. So your help is apreciated if you have some background in this kind of thing. I'm not commited to Ford parts either. I like the Howell GM TBI setup but the same questions apply there that I have for the TPI. Any information you might have is greatly apreciated. Thanx. NORM
Hi, I'm Norm and I'm a Broncoholic |
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Linny Wingard
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• Charlotte, NC, USA |
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• Registered on 3/16/2003 |
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• 28 posts |
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Posted:5/29/2003 20:15 |
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Why are you wanting to use high-flowing Cleveland heads on what you're describing as a low-revving engine? Those big ports and valves would kill your bottom end. |
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Posted:5/29/2003 21:56 |
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I was hoping for more low end power using a short duration cam with wide lobe separation. Do you think the stock Windsor head would work good on the stroker for what I want to do? I was thinking that I might not need all that volume but wanted to play it safe. What FI setup would work best for what I want to do?
Hi, I'm Norm and I'm a Broncoholic |
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Linny Wingard
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• Charlotte, NC, USA |
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• Registered on 3/16/2003 |
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• 28 posts |
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Posted:5/31/2003 19:59 |
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Try the '96+ Explorer GT-40P heads. Plenty of breathing, without sacrificing your low-end torque! 
Actually, most of the milder aftermarket heads will do you just fine. Some even outflow the Clevelands at higher revs and still deliver better bottom end torque! Just goes to show what a few decades of research can do.
I'd go with Ford's mass air EFI, if only because you can go to any dealership and get parts for it. |
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Posted:6/1/2003 12:58 |
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Were those 302 heads? Or did the Explorer come with a 351W also. I've never ventured far into researching the Explorers. One guy I've been discussing this with recomended the World heads. Any pro's or cons with these? Also I'm thinking for what I'm wanting to do, torquing along at less than 5mph on off camber terrain that my stock heads might work just fine. Any recomendations on how I should have the stocker valves ground? How big can I go Without sacrificing too much or should I just go as big as the machine shop can cut? Thanx for your help.
Hi, I'm Norm and I'm a Broncoholic |
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Posted:6/4/2003 01:37 |
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| Quote: | | Were those 302 heads? Or did the Explorer come with a 351W also. I've never ventured far into researching the Explorers. One guy I've been discussing this with recomended the World heads. Any pro's or cons with these? Also I'm thinking for what I'm wanting to do, torquing along at less than 5mph on off camber terrain that my stock heads might work just fine. Any recomendations on how I should have the stocker valves ground? How big can I go Without sacrificing too much or should I just go as big as the machine shop can cut? Thanx for your help. |
Hi Norm, I now the 392cid motors well, do not think your going to need much on the intake side from what you just said.
Ok, I am going to assume (a lot)here, you have a Stock Compression Ratio, lets say 9.0:1 ?.
Then I would say you only need to go to a 1.94" Intake Valve & a 1.60" EXT. Valve, with a 3 angle Valve Job, make sure you open up the Bowls too & blend into the runners, I also remove the little knobs in each of the EXT. Port Runners too, then still use the stock EFI intake, will increase your HP and still keep your low end turq.
NOTE : Sometimes you will spend $$$ on them heads and it is not worth it, just purchase a set of heads already done (PA or Perfomance Automotive Catalog)or check with your local maching shop they may already have a set sitting there ready to go.
Now as far as your Cam go's, (Stock, Mild, Extreme) will affect where your Turq. will be too, so choose the Cam to suite what you are going to do.
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Posted:6/4/2003 01:39 |
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| Quote: | I've tried to get advice on several other boards concering this topic. I'll try it hear in case there is a motorhead that can help me. This next winter I plan on making a 392 Stroker out of my 351W block. I know this can be done by using a 3.850 crank, stock rods, and 302 pistons. Oh yeah. I'll also be using 351M 2V(bigblock) heads and an intake adapter plate.
The 351M 2V heads double the breathing capacity of the motor as it's ports nearly double the size of the stock Windsor head. OK 'nuff background on the motor. Now the tough part and the part in which I need help. I want to Inject this bad boy. Does anyone know if the stock Ford TPI would flow the required airflow for the additional stroke and breathing of the heads? I want to cam this motor to make it's power in the 1000-3000rpm range so high rpm use is not an issue as it would be on a race engine. I don't know much about how the fuelie computers work. So your help is apreciated if you have some background in this kind of thing. I'm not commited to Ford parts either. I like the Howell GM TBI setup but the same questions apply there that I have for the TPI. Any information you might have is greatly apreciated. Thanx. NORM |
Norm, I beleive you are talking about the 351C Heads, to get a Clevor motor or that is what I always did use. |
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Posted:6/4/2003 07:24 |
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I'm thinking of staying with stock heads now. Someone said that the Cleveland heads would kill my low end torque and that is exactly the opposite of what I need to do. i want to make big torque at low rpm. Most of my driving is off highway in my fullsize bronc and I would like a little more umph. Currently I have a 351W carb'd with a QJet carb. i use the QJet because of it's good off highway manners in off camber situations. I'd love to go injected with the stroker idea but it's starting to look like more of a PITA than it's worth. Do you think Chevy TBI would work well with what I want to accomplish? Thanx for your help John. NORM
Hi, I'm Norm and I'm a Broncoholic |
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