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Old 06-04-2002, 04:39   #1 (permalink)
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Question to stroke or not to stroke

i am considering stroking my XR8 sprint, most likely to 347cu

has anyone got any experience in this sort of thing that can help me out with some info on whether its actually worth the trouble, and more importantly the dollars?

only thinking about it right now, but the engine is out and the heads are off so thought now would be as good a time as any.

any thoughts???
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Old 06-04-2002, 04:55   #2 (permalink)
Two SC 61's = trouble
 
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Go the 331 with all the light but STRONG gear...Select the right piston with good valve reliefs.With good quench..port those heads/inlet and you'll have an engine that'll revforever!!!!

Edit did a search forya.

http://www.corral.net/forums/showthr...ht331+strokers

http://www.corral.net/forums/showthr...hlightstrokers

Not working have to do manualy
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Old 06-04-2002, 05:18   #3 (permalink)
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I have been trying to decide for the past couple of months. My engine has been in pieces for ages, and I want to do something in the next week or two. I initially wanted a 331 stroker, but all the pistons I have found to suit will run around the 9.9:1 compression ratio (9.7 with your gt40 sprint heads), and I think that may be too high without alloy heads (not sure though, so can anyone answer that question). The 347 will give more torque, but depending on who you talk to, could be unreliable in a daily driven car, due to the lower rod to stroke ratio. Ford selecting the 347 (or close enough) kit for their new T series has pushed me back towards the 347ci kit.
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Old 06-04-2002, 05:54   #4 (permalink)
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The stroker kits are good but i reckon the stock heads/intake would then be a major restriction. Some nice trickflow or AFR alloys would be the go and flow great straight out of the box.
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Old 06-04-2002, 22:01   #5 (permalink)
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Quote:
Originally posted by PigDog
The stroker kits are good but i reckon the stock heads/intake would then be a major restriction. Some nice trickflow or AFR alloys would be the go and flow great straight out of the box.
Spot on there Pigdog.. Add good cam as well..
Those Trick Flow inlets are MASSIVE..
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Old 06-05-2002, 01:01   #6 (permalink)
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the heads are off at the moment because im porting them...taking ages though because i spend too long here and not enough time with the die grinder in my hand!

have already ground up a nice cam so thats covered. bigger valves are also on the agenda before it goes back together hopefully.

as for the intake, anyone know what a good intake is worth?
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Old 06-05-2002, 14:49   #7 (permalink)
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Damn 331 people. Trust me, 347 is great and works fine. Plus torque is what matters on the road. Mine revs so easy it feels like a race engine, and with the Trickflow top end it has good torque and strong top end.

As for costs of Trickflow stuff, try contacting High Performance World in Sydney who I believe now have Trickflow stuff in stock. They appear to have posted in the market forum.

More cubes is EVERYONE's answer!
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Old 06-05-2002, 16:27   #8 (permalink)
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Let me add my weight to APs comments - the 347 produces great torque and as long as you are carefuyl with gudgeon pin offset should prove reliable.
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Old 06-06-2002, 03:49   #9 (permalink)
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A.P iff you read those links it said that too many people put the pistons in with too much clarance causing them to rattle when cold.Said 347/330 with GOOD pistons is a good mill.But again people still keep putting them together like the old racing mills and the rocking due to the extra clarence etc causes most the problems associated with oil consumption..With hypo pistons they can run real tight...These are coments from guys like Ed Curtis who knows his stuff..I wasn't bagging the 347 o/k...
The Trick Flow inlet is $1130.oo Track heat tfs- 51500002 www.highperformanceworld.com.au
A.P is your's nice and quiet when cold??? I have heard it!!!
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.
Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
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Old 06-06-2002, 15:54   #10 (permalink)
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Quote:
Originally posted by ebxr8240
A.P iff you read those links it said that too many people put the pistons in with too much clarance causing them to rattle when cold.Said 347/330 with GOOD pistons is a good mill.But again people still keep putting them together like the old racing mills and the rocking due to the extra clarence etc causes most the problems associated with oil consumption..With hypo pistons they can run real tight...These are coments from guys like Ed Curtis who knows his stuff..I wasn't bagging the 347 o/k...
The Trick Flow inlet is $1130.oo Track heat tfs- 51500002 www.highperformanceworld.com.au
A.P is your's nice and quiet when cold??? I have heard it!!!
My engine is very noisy, however that seems to be valvetrain. I always idle the engine for a few minutes before driving, and never rev above 3000 until temp gauge is in operating range. Of interest was that one of my sets of pistons was badly scuffed after a very short time, however I put that down to water in the oil.

With all the comments on assembly and using the right parts - isn't that common sense for all hi-po engines? Not just the 347!
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