New hammer what will it run?

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M

MHEAD

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Updating my Dakota this winter that I built for my son to race.
Old combo was
360 10.64.1,9.5 converter,4.10,solid cam 254@.050 .560 lift,j heads,1 3/4" headers
Best in real good air was 1.49 60,7.0s 1/8,11.0's 1/4 @ 118 I think.It started slowing down at the last half of the season so all the more reason to put a stroker combo together.Tore it down a few months ago and number two main bearing was chewed up pretty good and number one rod small end bushing has some play that was noticeable.
New engine is going to be
416 12.43 compression unless we mill the heads
Icon flat tops
Molnar stock size rods(just showed up Friday...was getting a little nervous this build wasn't going to happen this winter)
K1 4" crank
Trick flow heads and intake
Custom erson solid cam(I had the cam made for 1.5 rocker but now I also have 1.6 harlands so depending on some clearance is probably what I will run)
Same header1 3/4"×3" headers
New fti 8" converter said 5600 stall(904)
Same dana s60 4.10
Have a pro systems 750,quick fuel 950 and a custom e85 carb we could try
3170 race weight
My machinist is trying to talk me into using his dyno so we will see.
What do you guys think it run?
Thanks
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What year Dakota do you have.? What brand of header are you useing ? Sounds like a great set up. Your new engine build. I am wanting to build a 13.5.1 426 for my 91 Dakota sport race truck. I just have a 11.1 2000 360 magnum best pass so far on 93 pump gas has been a 11.24 at 116. Do you have any pictures of your truck
 
mopar65 said:
What year Dakota do you have.? What brand of header are you useing ? Sounds like a great set up. Your new engine build. I am wanting to build a 13.5.1 426 for my 91 Dakota sport race truck. I just have a 11.1 2000 360 magnum best pass so far on 93 pump gas has been a 11.24 at 116. Do you have any pictures of your truck
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91 Dakota.Headers started as 5204 hookers that I had left over and then I bought a universal kits from Jegs and cut away.They aren't pretty but that wasn't the intention.
 
mopar65 said:
What year Dakota do you have.? What brand of header are you useing ? Sounds like a great set up. Your new engine build. I am wanting to build a 13.5.1 426 for my 91 Dakota sport race truck. I just have a 11.1 2000 360 magnum best pass so far on 93 pump gas has been a 11.24 at 116. Do you have any pictures of your truck
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It looks like a good combination to run on straight methanol. Providing the chassis works properly that should be a solid mid to low 10 second zone ride.
 
Garrett Ellison said:
It looks like a good combination to run on straight methanol. Providing the chassis works properly that should be a solid mid to low 10 second zone ride.
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I would like to figure out this e85 carb i have.I made one outing with it on my car but it fell on its face then took off.It went two more mph than the day before even with the stumble.I just ran out of time and then went to summit bracket finals so put gas carb back on.
 
I drove a friend's 12.5 to 1 440 coronet, running mid tens on e85. Most vivid memory was sitting idling in the staging lanes in California, on an 85° day, trying to get the engine warmed up enough to make a pass. Water pump off. Fans off. Owner says you have no chance of leaving the starting line good at less than 180°.
I'm betting you were leaving the line at what was stone cold for e85.
 
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33IMP said:
I drove a friend's 12.5 to 1 440 coronet, running mid tens on e85. Most vivid memory was sitting idling in the staging lanes in California, on an 85° day, trying to get the engine warmed up enough to make a pass. Water pump off. Fans off. Owner says you have no chance of leaving the starting line good at less than 180°.
I'm betting you were leaving the line at what was stone cold for e85.
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I think your on to something there from what I'm reading . I'm also told to gap plugs .025.
 
MHEAD said:
I'm leaning that way just to break in the cam.
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10 twenties is my guess... nice build! I've always liked the Dakotas ! I always dyno my motors, the last one I didn't because of time constraints and had a problem after 15 runs that would have been found if I had dynoed it, its almost back together and will be dynoed shortly. If for no other reason the motor can go from the dyno right into the car/truck and its ready to race already broken in and tuned. It takes a lot of the tuning guess work out of the equation.
 
I'm going to say Low 10's....possibly better with good air. Your combo looks like it will be putting out about the same power as my 408, except your truck is a little lighter and you are running a 904, which is going to be faster than my 727 any day. Once the combo is sorted out, that thing should boogie.

Also, I can confirm, if I don't get my engine hot enough (using e85) it will stumble off the line. ~180°F is best (can be a little lower, but not much).
 
Just curious what size of rear tire you’re running and what your chassis is certified for. What block is your 416 based on and re you running a girdle, four bolt caps, or block fill? I do like that Erson cam profile for everything that's planned. While you could make more power and run faster with a roller, it may not be worth it if you have to upgrade the block or chassis to handle the extra power or to pass tech for a different e.t. range. What you have is more than adequate for that 7000 rpm shift point, and running it on e85 will equate to about a 10-15% power gain, possibly more with the good heads and 12+:1 compression.
 
Garrett Ellison said:
Just curious what size of rear tire you’re running and what your chassis is certified for. What block is your 416 based on and re you running a girdle, four bolt caps, or block fill? I do like that Erson cam profile for everything that's planned. While you could make more power and run faster with a roller, it may not be worth it if you have to upgrade the block or chassis to handle the extra power or to pass tech for a different e.t. range. What you have is more than adequate for that 7000 rpm shift point, and running it on e85 will equate to about a 10-15% power gain, possibly more with the good heads and 12+:1 compression.
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E85 is no way a 10-15% power gain. Your talking 50+ horse gain.
Most guys i know who run it with a carb may or may not pick up a few hundreds, not much more, if even that.
Car will run cooler, and its cheaper more consistent than gas usually are the real bennies
 
B3422w5 said:
E85 is no way a 10-15% power gain. Your talking 50+ horse gain.
Most guys i know who run it with a carb may or may not pick up a few hundreds, not much more, if even that.
Car will run cooler, and its cheaper more consistent than gas usually are the real bennies
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Correct, sorry about that! Yeah, may see a gain NA if you have tuning skills, it takes boost to make real gains with e85.
 
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flyfish said:
I'm going to say Low 10's....possibly better with good air. Your combo looks like it will be putting out about the same power as my 408, except your truck is a little lighter and you are running a 904, which is going to be faster than my 727 any day. Once the combo is sorted out, that thing should boogie.

Also, I can confirm, if I don't get my engine hot enough (using e85) it will stumble off the line. ~180°F is best (can be a little lower, but not much).
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I think I was at 165-170 degrees.
Like your guess on et.
 
Garrett Ellison said:
Just curious what size of rear tire you’re running and what your chassis is certified for. What block is your 416 based on and re you running a girdle, four bolt caps, or block fill? I do like that Erson cam profile for everything that's planned. While you could make more power and run faster with a roller, it may not be worth it if you have to upgrade the block or chassis to handle the extra power or to pass tech for a different e.t. range. What you have is more than adequate for that 7000 rpm shift point, and running it on e85 will equate to about a 10-15% power gain, possibly more with the good heads and 12+:1 compression.
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Can only go 10.0s.
28" tire but next pair will probably be 29".
Factory 340 block with studs and tall filled.
I had a hell of a time finding a cam because there aren't cores available with lobes this big.Erson only had two cores with this big of a lobe and we bought both but ground them different.
 
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