Engine choices, 331 or 347??

HiFlow5 0 · Nov 26, 2005

Rick 91GT said:
Like mentioned above it depends what you are after. Those heads are not ideal for a race tye motor but for a healthy street car they will be fine, and it will make a ton of TQ and good hp with the right cam.

If you go with a cast crank go 28oz, if you go forged and Eagle internal balance cranks are available go with that.

I did a 347 with 9.5:1 for another SN guy who put on a GT40- cast iron head and it runs great, it's a tq monster not a high hp dyno queen but it is very nice on the street.

Yeah, exactly what I'm looking for. Great all around car, street torque monster that sometimes see's the track. I wouldn't mind running low 12's high 11's all motor, and I think it should be possiable from a 347 with decent compression, seeing how I ran a 12.9 with my old motor and still had room for improvement, stock shortblock w/ e-cam, the top end mentioned earlier and pretty much stock fuel system.

I think what I'm leaning towards after some more reading is the CHP 347 kit, balanced to 28oz with 10.5:1 compression, and running the Comp extreme engery cam http://www.compcams.com/Technical/Search/CamDetails.asp?PartNumber=35-310-8 or http://www.compcams.com/Technical/Search/CamDetails.asp?PartNumber=35-514-8. Unless someone see's a better cam on comps site. http://www.compcams.com/Technical/CamHelp/Default.asp

Grn92LX · Nov 27, 2005

Thomas302 said:
The cars is apart right now, changing a few things, but the tfs-r intake was a good change from the gt-40. I know I have never had a 347, but when I was at the track, there was a guy with almost the same setup as me but on a 347, and he was running 11.5's to my 12.1's. He had no problems at all driving it all the time. But I am no expert by any means. I really enjoy my 331, it runs great. I just have the go faster bug, and 16ci more would be nice for the same money if I was to do it all over again.

Thomas, how are those 4.30 gears? Did you always have them or did you switch to them from a smaller gear? My car needs 4.30's badly, i'm crossing the traps WAY too low with these 3.73's. What was your mph? How is that spool on the street? Sorry for the million questions, but you have stuff that i'm interested in doing and I prefer hearing from experience only

Your combo sounds like a nice one to me with ton's of potential.

Rick 91GT · Nov 27, 2005

HiFlow5 0 said:
Yeah, exactly what I'm looking for. Great all around car, street torque monster that sometimes see's the track. I wouldn't mind running low 12's high 11's all motor, and I think it should be possiable from a 347 with decent compression, seeing how I ran a 12.9 with my old motor and still had room for improvement, stock shortblock w/ e-cam, the top end mentioned earlier and pretty much stock fuel system.

I think what I'm leaning towards after some more reading is the CHP 347 kit, balanced to 28oz with 10.5:1 compression, and running the Comp extreme engery cam http://www.compcams.com/Technical/Search/CamDetails.asp?PartNumber=35-310-8 or http://www.compcams.com/Technical/Search/CamDetails.asp?PartNumber=35-514-8. Unless someone see's a better cam on comps site. http://www.compcams.com/Technical/CamHelp/Default.asp

Custom Cam...

What kit are you looking at?

HiFlow5 0 · Nov 27, 2005

Rick 91GT said:
Custom Cam...

What kit are you looking at?

How do you go about ording a custom cam, what does the maker go off of to build you the correct cam?

CHP is running a special right now on Street Fight GT kit, http://www.coasthigh.com/Specials/Specials_current.htm. Which seems decent, but I was noticing that kit has a rod lenght of 5.400" where as the non-GT kit has a rob length of 5.315". Not sure if it's better to go with the shorter rod for $400 more, that looks to be the only difference between the two kits.

NKau · Nov 27, 2005

Give Comp Cams a call. I think they actually have cams designed specifically for stroker 331/347's now. Wouldn't hurt to at least call about a custom cam either; price difference between the two isn't a lot, and the performance gain of a custom might be worth the extra money to you.

Grn92LX · Nov 27, 2005

The comp cam's xfi stroker camshafts are MORE money than a custom.

FTI, hitech motorsports, buddy rawls will all design you what you want.

NKau · Nov 27, 2005

Grn92LX said:
The comp cam's xfi stroker camshafts are MORE money than a custom.

I was not aware.........

IndyBlk5.0 · Nov 27, 2005

holy you need to search batman!

Engine choices, 331 or 347??

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