what motor to use
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what motor to use
Hello, i am trying to chose what motor to use for my circle track race truck, the rules state that the biggest motor allowed is a 367cu in... and we are alowed to put a 500 lift cam in it. i dont have alot of money right no so i wont be putting a cam in it now but want to in the future.
what would be the better motor power to weight, 302, 302HO or a 351??
from what i have read the 302 is 185hp and 450lbs
the 302HO has 225HO and i cant find the weight
the 351W is 200-230hp and 510-525lbs.
i was told if i go a 351 to go a W, why is that??
thanks for any and all your help
Kris
what would be the better motor power to weight, 302, 302HO or a 351??
from what i have read the 302 is 185hp and 450lbs
the 302HO has 225HO and i cant find the weight
the 351W is 200-230hp and 510-525lbs.
i was told if i go a 351 to go a W, why is that??
thanks for any and all your help
Kris
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351w preferred as it was in production the longest of the 351s, and has a great aftermarket and Ford support. The 351C is a shorter deck engine with potentially better heads, but is more expensive to build and not in as great a supply as the W.
The 351M--don't take one for free for this purpose.
A .030 overbore on a 351w takes it to about 357, so you can rebuild one if need be.
You gonna be running against 350 Chevs pulled out of Corvettes? 5.7 Hemi motors?
Not a lot of money huh? Well, racing will take care of what you have, so that won't be a problem for long.
The 351M--don't take one for free for this purpose.
A .030 overbore on a 351w takes it to about 357, so you can rebuild one if need be.
You gonna be running against 350 Chevs pulled out of Corvettes? 5.7 Hemi motors?
Not a lot of money huh? Well, racing will take care of what you have, so that won't be a problem for long.
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i am mostly racing agaist chevs with 350, but they are all junkyard motors as i race in northen BC and no one has a lot of money to put into there race cars.
I was also wondering if i find a 351 EFI, would a 302 cast iron intake fit it or do i need a 351 intake? i know being a EFI i will have to run a electric fuel pump with enersa switch, but wondering about the intake?
Thanks again
I was also wondering if i find a 351 EFI, would a 302 cast iron intake fit it or do i need a 351 intake? i know being a EFI i will have to run a electric fuel pump with enersa switch, but wondering about the intake?
Thanks again
Elder User
Joined: Jan 2009
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From: East Tennessee
What size tires are you running. What weight is the truck. What gear are you running in the rear?
The 5.0 would be great if you are going to be able to keep it above 4k RPM... but if you guys don't have a lot of money, and are running stock 5.0's with big tires and average gearing (3.50), I don't see a 5.0 being the one to get you out of the whole quick around the curves... unless you can keep the tires spinning.
Do you have any parts already for anything? The more money you can save, the more you can put into your truck.
The 5.0 would be great if you are going to be able to keep it above 4k RPM... but if you guys don't have a lot of money, and are running stock 5.0's with big tires and average gearing (3.50), I don't see a 5.0 being the one to get you out of the whole quick around the curves... unless you can keep the tires spinning.
Do you have any parts already for anything? The more money you can save, the more you can put into your truck.
Postmaster
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With the right cam a 302 will have good power from 2500 to 6500 , and its lighter , the 351 will have more low rpm power . The HO will weigh the same , you can stroke the 302 to a 347 & whip them 350 chevys ,,LOL ..... Lew
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right now the current set i have is a worn out 302, t18 trans, with a 3.23 gear and running 84inch in circumference tire. i run at 5100 rpm at the end of the stright away and 4000 comming out of the corner and run the trans in 3 gear.
As for the truck weight, im guessing 3400lbs and most of that is front weight, i have 3.08, 3.23, 3.50,3,73 and 4.10 gears i can use. the truck is already bult and have been running it for 3 years but this last year it started to get slugish as the motor started to die out.
dose that help at all??
Kris
As for the truck weight, im guessing 3400lbs and most of that is front weight, i have 3.08, 3.23, 3.50,3,73 and 4.10 gears i can use. the truck is already bult and have been running it for 3 years but this last year it started to get slugish as the motor started to die out.
dose that help at all??
Kris
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Try to find an Explorer/Mountaineer 5.0 they have GT40 heads, with the right cam(like a Ford E303) it'll make over 300hp depending upon intake and exhaust. Do you have to run exhaust manifolds or are you allowed headers? If manifolds get a set from a 351 they have larger exits.
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what dose that 5.0l make for hp without the cam??? we have to run stock cast iron intake and exhaust, what is the best intake to look for??
thanks for all the help so far, keep it coming!!
Kris
thanks for all the help so far, keep it coming!!
Kris
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From: Ottawa, Ontario
The only 5.0 that makes halfway decent HP with the stock cam is the HO.. maybe 250-260hp with a free flowing exhaust and manifolds. The stock cams in all the other motors have really short durations which means peak power is less and happens lower on the tach.. down around 4000rpm. But the Explorer motor has better heads with more flow potential than the HO version so if you could combine that with a HO cam you would have a pretty potent combo, The HO roller cam can often be found used for dirt cheap and it's a direct swap into the Explorer motor which is a factory roller motor.
Elder User
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From: East Tennessee
Can't you save money buy rebuilding your current engine and throwing you a .500 lift cam in it?
Otherwise, if you are buying a new engine... seems like you might want something bigger if everyone else is running 350's and stuff.. But the RPM that you are running at is 5.0 territory.
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i thought about rebuilding the motor, but never have rebuilt a motor before. Also, the motor is out of a late 70's truck and only has 2psi of oil pressure at idel, and has been well abused.
I just though of the price of the rebuld stuff, it might be a little cheeper to find a newer motor that has more hp that i can drop in. Were would be a good place to buy rebuild kits in canada if possible as thats where i am from
thanks for all the help, keep it coming
Kris
I just though of the price of the rebuld stuff, it might be a little cheeper to find a newer motor that has more hp that i can drop in. Were would be a good place to buy rebuild kits in canada if possible as thats where i am from
thanks for all the help, keep it coming
Kris
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well, i have decided to switch to a differnt class so i have to come up with a differnt motor set up then planed, the old class i was running changed the rules and allowed more motor mods and i just dont have the money to put into a motor.
so, with that said, the motor rules for the class im in now are the following
Stock motor from factory, no aftermaket cams, no porting or polishing, cast iron intake and exhasut manifolds, 2br carb, 360cuin is the biggest motor aloud to run, no GT40 heads(for ford cars, chevs are limited on heads too).
so, im thinked the motor i want to run or biuld is a 302HO, from what i read its a 302 with a 351 cam, what else do i need to build this motor?
or what other motor combos would be good? i.e. 302 with 351 heads? 302 with 289 heads?
as taken from earlyer, im going to run a set of 351 exhaust manifolds
I Have looked im my area for the 5.0l out of the explorer, but no one has one localy and from the closest junkyard they want $1200. i have been given a couple older 302 but havnt looked at the casting numbers to find out what years they are.
Thanks for the help once again
Kris
so, with that said, the motor rules for the class im in now are the following
Stock motor from factory, no aftermaket cams, no porting or polishing, cast iron intake and exhasut manifolds, 2br carb, 360cuin is the biggest motor aloud to run, no GT40 heads(for ford cars, chevs are limited on heads too).
so, im thinked the motor i want to run or biuld is a 302HO, from what i read its a 302 with a 351 cam, what else do i need to build this motor?
or what other motor combos would be good? i.e. 302 with 351 heads? 302 with 289 heads?
as taken from earlyer, im going to run a set of 351 exhaust manifolds
I Have looked im my area for the 5.0l out of the explorer, but no one has one localy and from the closest junkyard they want $1200. i have been given a couple older 302 but havnt looked at the casting numbers to find out what years they are.
Thanks for the help once again
Kris
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I would run the 302. The ford guys that run up at my local short track use and it and do very well against the 350 chevys. If you have the rules at easy access that would make this easier. I know the rules for the motors at my short track are quite strict on what can and can't be done.