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Author
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Topic: opinions on 351 rebuild?
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smblk t-bolt
Journeyman Posts: 67
From: port alberni BC Canada
Registered: Apr 2002
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posted 11-19-2002 12:37 AM
   
Hi, just wanted an opinion(or 2,or 3).
just picked up a 69 351w...c90e built in early 70.Taken it apart and the inside is in perfect shape...so much so that it has no ridge in the bores at all...like maybe all it needs is honeing.just curious..do you go with the min amount of boring, to save the block for later rebuilds or go for the 30 over to max out displacement.any other block prep ideas?in the past I've chamfered all the oil returns and ground out a bit of the wall between the 2 oil passages above the main bearings to make a small oil pocket...and also deburred the block.any opinions anyone?thanx for any info
ps:Its mostly gonna be street driven with some track time.would like et's in the high 12's range..though i may be dreaming.
64 fairlane
lots of fibreglass
even more bondo[This message has been edited by smblk t-bolt (edited 11-19-2002).] [This message has been edited by smblk t-bolt (edited 11-19-2002).]
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stang106
Gearhead Posts: 734
From: God's Country!... Port Alberni B.C. Canada
Registered: Jul 2001
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posted 11-19-2002 09:25 AM
Ron,
I spent a few hours radiusing ,deburring and polishing the crank journals for less windage; you're going to get it balanced anyway. I would suspect that the cylinders have a taper or are out of round. See what's available in the pistons you want and if 0.020" over is available, take it. Line honeing can free up some HP if there is any drag on the crank. Bottom tap all holes now before the machine work. Which heads did you get?
Dave------------------
'70 ragtop Stang
351W - 13.70 @104.
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smblk t-bolt
Journeyman Posts: 67
From: port alberni BC Canada
Registered: Apr 2002
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posted 11-20-2002 02:32 AM
dave..havent picked any heads up yet.Its last on the list because of cost.(heads,hardened pushrods,and I cant use my rockers because of the rail tips)when I get to that point I'm going for the edelbrocks,they seem to get good reviews and the price is right.otherwise,this year I'll use my ported 351 heads.tell ya, I sure like doing engine work over body work...yuck64 fairlane
lots of fiberglass
even more bondo
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Rustang
Gearhead Posts: 471
From: Clarion PA
Registered: Nov 2000
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posted 11-20-2002 01:26 PM
You're probably looking at around 350hp to get you in the 12's. I think the block will be fine as-is. You'd probably want to do the standard checks like main alignment, and check for cracks via pressure check and/or magnaflux. The stock oiling system's fine with the addition of a high volume oil pump. If you're running a solid cam I'd put oil restrictors in the block. C9 blocks are pretty tough and you shouldn't have to do any oiling, stress relieving, or strengthening mods until you get over the 500hp level. 'Course I could be wrong...  ------------------
'68 mustang 351 clevor- 10.92@124
'67 Stang, 351W -11.18@118
'69 351C Torino-14.90@100
'78 Pickup 351W-15.56@88
'79 Pickup 460 ET=??
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stang106
Gearhead Posts: 734
From: God's Country!... Port Alberni B.C. Canada
Registered: Jul 2001
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posted 11-21-2002 11:34 AM
Ron,
I am using a Mellings stock volume oil pump and no oil restrictors. I would never use the Hyperutectics pistons again, and I do like the JE forged pistons. I like solid cams, and lots of guys do well with Comps'270s or 280s. Mine has more lift and less duration than these. Open that head book I lent you and follow what Vizard reccomends.
Dave
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steve'66
Gearhead Posts: 6522
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 11-21-2002 06:33 PM
Ron,Give it flat top forged pistons, 2.02 E-brock rpm heads, a solid cam, Perf. RPM intake, a 750 Holley DP'er, and go run high 11's.  SteveW
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smblk t-bolt
Journeyman Posts: 67
From: port alberni BC Canada
Registered: Apr 2002
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posted 11-21-2002 10:23 PM
thanx guys...as for the running 11's part,I can only dream!The way my car is set up, thats a ways away yet! 
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steve'66
Gearhead Posts: 6522
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 11-21-2002 10:33 PM
Yeah,For high 11's you'll need 10" slicks, traction bars, a built c-4, 4000 stall converter, 90-10 shocks, etc. But the h.p. will be there. It may only run high 12's until you get the rest of the car in shape. SteveW
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stang106
Gearhead Posts: 734
From: God's Country!... Port Alberni B.C. Canada
Registered: Jul 2001
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posted 11-22-2002 06:16 AM
Ron,
Bolt on a single plane intake for the strip, and use you dual four's for the street. You almost have the 11 second package now.
Dave
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smblk t-bolt
Journeyman Posts: 67
From: port alberni BC Canada
Registered: Apr 2002
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posted 11-22-2002 07:25 PM
dave, I'm kinda hoping the extra cubes may help with the duals...at least until I can afFORD some extra pieces to try out.no decision on pistons yet.did you want my stock exaust manifolds?I'm not gonna be using them, maybe you want some spares.ps:where did you get your balancing done? 64 fairlane
lots of fiberglass
even more bondo
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stang106
Gearhead Posts: 734
From: God's Country!... Port Alberni B.C. Canada
Registered: Jul 2001
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posted 11-22-2002 09:33 PM
Ron,
Dave and Shane at Unlimited Performance sent it for balancing. I think it was only about $160.00, a real bargain. I think your dual four's will work better with more signal from the 351.
Dave
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