Q-Time tubo for 302 work with 351? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 9 Old 05-22-2009, 06:39 PM Thread Starter
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Q-Time tubo for 302 work with 351?

I am wanting to start on my next build, engine stand is lonely. I have no experience with the 351 but wandered if the quicktime kit I'm running on my 302 will work on a 351? I know the turbo is probably to small, but will the headers work with slight modification? Would this combo mesh together well, or bad idea?


This is a single Precision 70mm turbo with air to air intercooler.
·The headers are 1/2" thick laser cut flange with 1 5/8" primaries and 2 1/2" collector.
·The cross over is 2 1/2" with flex joint and 2 2 1/2" v band clamps for easy removal.
·1/2" t4 turbo flange
·Comes with a 3" down pipe and v band clamps in two places for easy removal if needed without dropping all exhaust.
·TIAL 38mm wastegate.
·TIAL 50mm bov.
·All silicone couplings are with the kit.
·The oil lines -4 braided feed line and -10 braided return line


Stock block, GT40 heads, Explorer intake, 67mm, 10lbs, 431HP 497TQ on 110 octane. 12.01 @ 123
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post #2 of 9 Old 05-22-2009, 06:45 PM
 
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Don't know,but surely you'll have to modify the crossover.Probably go with a 76mm or larger turbo.One of the threads in the power adder section touchs on the turbo size for 351 base setup,you can check that.Hope thats a little help.

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post #3 of 9 Old 05-22-2009, 11:42 PM
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run a boss block pusssaaaay

Precision 67mm turbo, this and that.
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post #4 of 9 Old 05-23-2009, 07:47 AM Thread Starter
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Boss & Dart block $1500-$2k

351W $200 and I hear they hold up to 700hp pretty well.

Stock block, GT40 heads, Explorer intake, 67mm, 10lbs, 431HP 497TQ on 110 octane. 12.01 @ 123
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post #5 of 9 Old 05-23-2009, 09:36 AM
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You could also buy another 67mm and fab it into a twin set-up, since you are going to be re-welding or plumbing things allready.
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post #6 of 9 Old 05-23-2009, 10:02 AM
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Quote:
Originally Posted by jturmanator View Post
Boss & Dart block $1500-$2k

351W $200 and I hear they hold up to 700hp pretty well.
But does a used 351W block take the same machine costs to make it ready for a build v. a Boss or Dart? Sure the 351W is a savings but I doubt it is a across the board $1300-1800 savings. Plus is a $200 351W block a hydraulic roller 351W block or flat tappet because then might face need for a new cam although one might argue need for a new cam either way. Do not forget you need a different intake, oilpan, accesories take some sort of modification if I remember right, usually a different hood for the added height although some cars have the hoods already, heads that flow sufficiently for the added cubes(and turbo cars do not need added cubes to make a great deal of power so a 302 Boss motor is sufficient to make more power than a 351W supposeably can handle) and probably some other misc items. Then again I am not familar enough with the Boss and Dart, perhaps some of those needed changes must be done for them as well.

Years ago I compared the costs to go with an A4 block(since that was the only option back then) v. a 351W and the costs differences were not much in favor of the 351W route.

--Admiral Aaron

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post #7 of 9 Old 05-23-2009, 12:40 PM Thread Starter
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I was hoping to pick up a 351 at the local Pull a part I really want another engine on the stand before I really hammer down on the stock 302 Id like to slap the 14lb spring in. I realize the hood, oilpan, intake, fuel system, and distributor need changing when swapping to a 351, but look at the avialability and cost of the 351 block. Have not checked on the 69-72 though.

I guess my question is what size a/r and turbo is ideal for the 351w?

Stock block, GT40 heads, Explorer intake, 67mm, 10lbs, 431HP 497TQ on 110 octane. 12.01 @ 123
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post #8 of 9 Old 05-23-2009, 12:42 PM Thread Starter
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You could also buy another 67mm and fab it into a twin set-up, since you are going to be re-welding or plumbing things allready.

Dont think this is something I want to tackle.

Stock block, GT40 heads, Explorer intake, 67mm, 10lbs, 431HP 497TQ on 110 octane. 12.01 @ 123
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post #9 of 9 Old 05-23-2009, 12:50 PM
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A 69-72 block is not going to be a hydraulic roller block so you will need to factor in a cam and probably different type of lifters and if you want to go hydraulic roller then you might have to use the expensive lifters. The early 90s or maybe slightly before that were hydraulic roller cam blocks and I believe you could retain whatever cam you are using today as well as lifters, but some say those are weaker blocks. Your GT40 heads really would be undersized for a 351 even though they will work, heck they worked on the first gen Lightnings after all.

You'd be better off selling the 67 and going to something bigger and more properly sized for the flow needs of a 351W.

I'd look at the available cost of used motors using A4, R302, original Boss blocks(maybe, tend to be over priced in my experience), and even used motors using Dart and new Boss blocks before marrying to the idea of a 351W. You still end up going with a used block either way and an A4 or even original Boss block in my opinion is better than the factory 351W blocks. Actually I think a Mexican 302 block is better or just as good as a 351W block. I know many dismiss a B50 302 block but I have a couple of friends who have been running those for years in daily driver turbo cars making in the 650-750hp range and still not broken the things.

--Admiral Aaron

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