347 stroker cylinder heads

NRM90GT

New Member
Nov 27, 2005
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Boston
will my edelbrock performer(1.9/1.6) cylinder heads and tfs street heat intake be to small for the 347 i am going to build? would like to keep them but i would part ways if i would get a dramatic power increase with an upgrade. i also want to keep some drivability
 
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i forgot to mention the heads are set up for pedestal mount rocker arms. would they hold up with the higher rated springs and higher lift cam that will be installed. would it be a good idea to get them converted to studs or just upgrade to a bigger head with studs.
 
with a serious head intake upgrade, would my t5 holdup?

It could be moments away from death right now,lol.

I've heard of people breaking T5's with stock power and good tires. Personaly,when the 5.0 used to be in my car,the T5 held-up and took the beating like a champ,with slicks and 150hp nitrous hits quite often.

On the opposite end,a buddies complete stock 5.0 broke one downshifting from 4th to 2nd at about 40 mph.
 
From what I have seen the stock T5 is pretty unpredictable. I kept the stock trans in mine a couple of years and was running high 12s. When I added nitrous I went ahead and swapped it for a TKO. Knew there was only so much it could hold.
 
i think i'll probably just use my existing edelbrock heads, and port them a little bit. i dont think i want to take a chance of spending the dough on heads/intake, then blowing the t5 and having to drop another 2k on a trans. i'm still wondering if i should upgrade the heads to studs or if the pedestals will be sufficient.
 
No. You won't.

The 347 will make more power at a lower RPM,idle better and have more vacuum avaliable for power brakes,ect. than the 302 will.

NRM90GT,I would look at going with a larger cam and some light clean-up on the heads will be fine.

Sorry sugar pie but you are wrong. A 347 with small 302 parts will make about 30rwhp more than the 302 will. Yes more torque but I don't think we are pulling up stumps here. Put bigger parts on the 347 and allow it to breathe and all you will have to worry about is the block. ;)
 
Sorry sugar pie but you are wrong. A 347 with small 302 parts will make about 30rwhp more than the 302 will. Yes more torque but I don't think we are pulling up stumps here. Put bigger parts on the 347 and allow it to breathe and all you will have to worry about is the block. ;)

You just said it yourself,a 347 will make more power than a 302 "with small 302" parts....

30wrhp is closer to 40-50hp at the flywheel

He already has aluminum heads invested and an intake that works just fine for a street car,or you can port it to get some more pull out of the top end witch is entirely dependant on your shift points.

Will bigger parts make more power? Of course,how much more and if its worth the extra cash is completely debatable and I say,no its not. Not to me anyways.