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Author
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Topic: 331 ?????
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project_stangs88
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Member # 4599
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posted
 
 
i just picked up a 331 short block, also some performer rpm heads, my ? is that would i have to get the heads worked on to get me good power or are the heads good right out the box.. any advise would help, trying to maybe do high 10's on motor?? best cam for setup? lmk thanks
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got my 65 mustang back! (bonny)! roller...
Posts: 1518 | From: Sunnyvale | Registered: Jun 2004
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turbo50
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Member # 6700
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posted
If you wanna go 10s on motor that thing better hook, better be light.
As far as the combo I would hope that 331 has some good compression. I think with the right cam/compression and cylinder head you can go 10s on motor with your 331 but that thing will be screaming.
You would have to have nearly 550hp at the flywheel for about 3000 pounds to run high 10s and that is in a perfect world.
I would suggest starting over with a 408 and some appropriate heads or adding nitrous/boost if that is your goal.
With nitrous or boost those performer rpms and the 331 will see 10s.
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.........when was the last time YOU built something with YOUR own hands?
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Posts: 7606 | From: Discovery Bay, California | Registered: Apr 2006
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threethirty1
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Member # 7814
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posted
quote:
Originally posted by project_stangs88:
i just picked up a 331 short block, also some performer rpm heads, my ? is that would i have to get the heads worked on to get me good power or are the heads good right out the box.. any advise would help, trying to maybe do high 10's on motor?? best cam for setup? lmk thanks
Lol, Your gonna need to spin 7k with 4:30s and under 3000#s. It can be done. Some guy on the corral made 418rwhp with his 331. 11:1, hi ports, monster cam etc..
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1987 Black GT
factory zero option car
Posts: 777 | From: North Bay | Registered: Jul 2007
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SVTGOD
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Member # 8613
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posted
is it a factory 302?
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R.I.P
Willie Guzman
my brother
1991 notchback
1997 cobra
2003 cobra
Posts: 1486 | From: San jose | Registered: Sep 2008
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project_stangs88
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Member # 4599
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posted
its a stock 302 from 88 fox 5.0... the 331 is going in a 65 mustang, 4:10' fuel cell, drag suspension ect... 10:1 comp... forged everythang, just wana see if i have to do any work to the heads to get more power or leave them the way they are, or get new heads?
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got my 65 mustang back! (bonny)! roller...
Posts: 1518 | From: Sunnyvale | Registered: Jun 2004
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92stangLX
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Member # 3252
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posted
quote:
Originally posted by project_stangs88:
its a stock 302 from 88 fox 5.0... the 331 is going in a 65 mustang, 4:10' fuel cell, drag suspension ect... 10:1 comp... forged everythang, just wana see if i have to do any work to the heads to get more power or leave them the way they are, or get new heads?
Not really a drag racer but.. prolly gonna have to slap some NOS on that bitch to run that fast.
Posts: 5302 | From: San Francisco | Registered: Sep 2003
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2stangs69-91
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Member # 1951
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posted
the heads will limit you. It can be done with a 331. It has been many times. Alot will depend on how well your car works. I would step up to a Vic JR head if you want to stay a little cheaper. Sell your RPMs to offset the cost, or you could just go run the car how it is and see how it does. It wont be a heavy car
[ January 08, 2010, 07:30 PM: Message edited by: 2stangs69-91 ]
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69 Mustang on hold
1991 LX hatch getting a make over
1994 F150 4X4 351
2006 Yamaha V-max 1200 Modded
Posts: 3711 | From: Redding | Registered: Oct 2002
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BCINGUU
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Member # 2397
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posted
quote:
Originally posted by 92stangLX:
Not really a drag racer but.. prolly gonna have to slap some NOS on that bitch to run that fast.
Or a Vortech... Even then, good luck getting into the 11s... You will need good fuel delivery.
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93 Cobra #4563 347ci 12.0@118 505rwhp 524tq
90 GT "Saleen Cobra" style convertible 347ci
67 GT "Eleanor" style coupe 347ci
Posts: 1425 | From: San Jose, CA | Registered: Jan 2003
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2BlueGeeTees
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Member # 4702
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posted
I ran the same heads on a 347 n/ a with a tfs stage 2 cam and 10.25 to 1 comp ratio and only made 365 hp and 380 tq to the wheels. Now I run the same bottom end with some good machine work a custom cam and afr 185 heads and a Vic 5.0 intake and I run 125 mph trap speeds but the car was 3300 pounds and I wasn't 60 footing where I should be and couldn't get under 11.5. Now I'm going carb and major weight savings to try for that 10.99. Also my performers had a serious port job and bowl work and the afr heads out of the box make so much more power.
Posts: 2316 | From: Vacaville | Registered: Jul 2004
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phildog
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Member # 1214
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I wouldn't pour a bunch of money into stock-type heads. If it were me, I would pick up a set of TFS FAC 190 heads, High Ports or some racy TEA modded heads. Lots of power is made in the heads, and trying to get stock replacement heads to knock your socks off is not going to come cheap.
Stock type heads are great for a street guy who just wants a quick car, maybe into the 11s.
Posts: 1554 | From: 510 | Registered: Apr 2002
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project_stangs88
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Member # 4599
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posted
IM TORN BETWEEN DA 331 I ALREADY HAVE OR BUILD A 408??
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got my 65 mustang back! (bonny)! roller...
Posts: 1518 | From: Sunnyvale | Registered: Jun 2004
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2BlueGeeTees
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Member # 4702
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Go with the 408. I didn't even have my 347 all the way done and I bought a 351 block to stroke out. Bigger is always better IMO.
Posts: 2316 | From: Vacaville | Registered: Jul 2004
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phildog
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Member # 1214
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Well of course a 408 would be great. Hell, cut the towers and lay in a 14-1 comp 532" and add a fogger and a plate and...you can go on and on. The point I am trying to make is that a 331 can go 10's on the motor. It will need a well matched combo and a good tune. An off the shelf cam and a set of stock replacement heads is going to disappoint.
Remember that it is the entire combination.
Posts: 1554 | From: 510 | Registered: Apr 2002
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BIGBALLFACTOR
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Member # 7277
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posted
you guy know there someone run 9.70s with a 306 an baby turbo an stock cam an out the box trick flow twisted wedge heads an his seats a little over 3000 lbs
Posts: 6908 | From: okc | Registered: Dec 2006
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