[cobrakid]

so i have a 1979 mustang and it already has a sum what built 302 in it with 125 shot of nitrous but we are thinking about building another engine. now we have a 308 with forged pistons and crank thats a roller motor but we also are thinking mabe a bigger motor. so i guess my question is. what motors will fit or is it better to build the 308? with what i have the car is already a 7.90 car in the the 1/8 mile.

[92_LX_5.0]

my suggestion would be to stroke the motor if you want more cubic inches...a 347 is only bored .030 over, but the stroke is longer. decent cam, nice set of heads should help you out....plus you could always put dual quads on it if you dont care about gas mileage....

[keepitmuddy]

i don't recommend the 347. others do. seems to be a 50/50 topic.

my reasons are either you'll have a good rod/stroke ratio but burn oil because the wrist pin is in the oil ring, or you'll have the newer, shorter pistons which won't burn oil but you'll won't have the good rod/stroke ratio and you'll lose some power

a 331 has the best of both worlds. makes more hp than 347 (can't be the torque tho) and won't burn oil. but i'm not suggestting the 331 as for your request for a recommendation on a bigger motor.

for price compared to power, i'd recommend a 393 stroker. a 331 or 347 stroker kit can generally cost around 1300 because you have to buy all new stuff.

but a 393, you use a 351w stock block, 351w stock rods. you need a 302 pistons (can get those used all day long) and the only place you actually got to put the money is in a new crank which measures 3.85" and will cost about $400.

so do you get all the extra cubes, make an easy 425+hp and killer torque for maybe.. $500-600 or do you spend close to $2000 for the 302 stroker and make less power.

reason i know this is because i went with the 331 stroker for my car. i got a scat street/strip stroker kit: steel crank, rods, probe SRP forged pistons for $1000. and my machine work was about $800. now i wish i had done the 393w like i was originally thinking about, and made more power from the motor alone before the 200hp shot of juice.

[cobrakid]

i have never heard of the 393. will the 351W block fit in the stock motor mounts? and how must would it cost to put the 393 together?

[StangAddiction]

Originally Posted by keepitmuddy i don't recommend the 347. others do. seems to be a 50/50 topic. my reasons are either you'll have a good rod/stroke ratio but burn oil because the wrist pin is in the oil ring, or you'll have the newer, shorter pistons which won't burn oil but you'll won't have the good rod/stroke ratio and you'll lose some power a 331 has the best of both worlds. makes more hp than 347 (can't be the torque tho) and won't burn oil. but i'm not suggestting the 331 as for your request for a recommendation on a bigger motor. for price compared to power, i'd recommend a 393 stroker. a 331 or 347 stroker kit can generally cost around 1300 because you have to buy all new stuff. but a 393, you use a 351w stock block, 351w stock rods. you need a 302 pistons (can get those used all day long) and the only place you actually got to put the money is in a new crank which measures 3.85" and will cost about $400. so do you get all the extra cubes, make an easy 425+hp and killer torque for maybe.. $500-600 or do you spend close to $2000 for the 302 stroker and make less power. reason i know this is because i went with the 331 stroker for my car. i got a scat street/strip stroker kit: steel crank, rods, probe SRP forged pistons for $1000. and my machine work was about $800. now i wish i had done the 393w like i was originally thinking about, and made more power from the motor alone before the 200hp shot of juice.

347 stroker kit doesnt have that oil problem anymore. Im pretty sure that CHP and DSS in specific dont place the wrist pins in the oil rings anymore. But I would vote in favor of a 351W over a stroked 302.

[Severo Diaz]

Dude the 347 would be a good choice for your car. I have one myself fpr a daily driven mustang and it dose not burn oil, there is a new kit from Coast High Performce that pushes the pin away from the oil ring. So if you need more help send me an E-mail sdiaz@probeindustries.com

Dude my car runs 7.50s (all motor) and 6.80s on 100shot in the 1/8th
347ci stock E7 ported victor Jr. 700cfm Holley 4.10s Stock T-5 (Daily Driven) So yall got head the f...K up From COMPTON

[Tony_90fox]

I am getting a 347 and the rumors about the oil burning is a thing of the past.

[1slo5.0]

Originally Posted by keepitmuddy i don't recommend the 347. others do. seems to be a 50/50 topic. my reasons are either you'll have a good rod/stroke ratio but burn oil because the wrist pin is in the oil ring, or you'll have the newer, shorter pistons which won't burn oil but you'll won't have the good rod/stroke ratio and you'll lose some power a 331 has the best of both worlds. makes more hp than 347 (can't be the torque tho) and won't burn oil. but i'm not suggestting the 331 as for your request for a recommendation on a bigger motor. for price compared to power, i'd recommend a 393 stroker. a 331 or 347 stroker kit can generally cost around 1300 because you have to buy all new stuff. but a 393, you use a 351w stock block, 351w stock rods. you need a 302 pistons (can get those used all day long) and the only place you actually got to put the money is in a new crank which measures 3.85" and will cost about $400. so do you get all the extra cubes, make an easy 425+hp and killer torque for maybe.. $500-600 or do you spend close to $2000 for the 302 stroker and make less power. reason i know this is because i went with the 331 stroker for my car. i got a scat street/strip stroker kit: steel crank, rods, probe SRP forged pistons for $1000. and my machine work was about $800. now i wish i had done the 393w like i was originally thinking about, and made more power from the motor alone before the 200hp shot of juice.

Your 331 and 347 theories are flawed. What experience do you base your misinformation on? Rod to stroke ratios don't mean squat. If that was the case all Chevy 454s would have been failures. 347s don't burn oil. Wrist pins located in the oil ring groove don't burn oil. Poor machine work and poor assembly can cause oil burning though. If you've ever assembled a 347 you'd know that the pistons that have the wrist pin intersecting the oil ring groove come equipped with ring land spacers which make the ring land solid as if the wrist pin wasn't even there. I've run many 347s and put on more miles than the odometer can count and never burned oil. Less cubic inches doesn't make more horsepower either. If you make 1.5 horsepower per cubic inch a 347 will make 24 more horsepower than a 331. Spreading misinformation like this gives people that don't know any better the wrong idea.