Trying to decide 347 or 383 with my D1, need your input
Thread Starter
Joined: Jan 2003
Posts: 2,503
Likes: 19
From: Minnesota Corn Fields
Trying to decide 347 or 383 with my D1, need your input Like the title says I'm trying to decide on which to go with when I do a forged lower half. So please post up your RWTQ at 3000rpm, 4000rpm, & 5000rpm along with what cubes, cam, heads, & boost. You MUST have a centri blower thanks
Currently I'm at:
All stock motor w/D1 @ 10psi
3000=380rwtq
4000=450
5000=490
Currently I'm at:
All stock motor w/D1 @ 10psi
3000=380rwtq
4000=450
5000=490
This is a good idea for comparisons.
Stock 346 F14 cam, untouched lq4 317 truck heads D1-SC @ 13 psi
I plan to stay small/347 and up the boost to 17-20
Stock 346 F14 cam, untouched lq4 317 truck heads D1-SC @ 13 psi
I plan to stay small/347 and up the boost to 17-20
Last edited by rufretic; Oct 22, 2007 at 08:08 AM.
I would probably stay with a 347 but thats my opinion. There is alot of diffrent directions you could go. If you plan on buying a new crank I wouldnt even think about doing a 383 you might as well do a 408 the only other thing you would really need is a block. If your on a budget like most of us are use the stock crank and block and put a good set of rods and pistons in it. you can make well over 600 hp with the right combo, It is also a good setup for a daily driver (torque doesnt overpower the street in the low RPM's).
good luck.
By the way I made 620 with a d1 and 347, still was running the little 3.5 inch inercoolers.
good luck.
By the way I made 620 with a d1 and 347, still was running the little 3.5 inch inercoolers.
8 sec potential, 12 sec slip
iTrader: (50)
Joined: Apr 2002
Posts: 4,092
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From: Savannah, GA
Either way, I think you'll have more hp & tq in the lower RPM's than you can even begin to think about hooking up on the street! I ended up going the 347 route... Good luck on your decision man 
Thread Starter
Joined: Jan 2003
Posts: 2,503
Likes: 19
From: Minnesota Corn Fields
Do you have your torque numbers at 3000, 4000, 5000 rpm?
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TECH Apprentice
Joined: Sep 2005
Posts: 333
Likes: 0
From: Detroit
You will max the D1sc out with the 347 - with right setup...
If you go with the bigger cubes, i suggest going with a F1a or bigger procharger (you'll eventually wanna go faster) Besides IMO the F1A sounds just sick, just sick at idle
If you go with the bigger cubes, i suggest going with a F1a or bigger procharger (you'll eventually wanna go faster) Besides IMO the F1A sounds just sick, just sick at idle
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