DSS306 or 331!!!!

SN95FREAK · Jul 31, 2008

I'm going to purchase one of the two so who has some info. on them. The car is a 94 gt automatic daily driver.
The car has got to be smog legal because I'm from texas but currently stationed in camp lejeune n.c
so I'm kinda limited on some of the things that I can do and gas mileage Who gives a f*!#. I would love to have a power adder but that just wont fit in the budget so N/A it is.
combo I'm looking at:
DSS 331 or 306 w/ afr185's/cam??
gt 40 intake/70mmTB/75mm MAF
24lb injectors
tremec 500 5speed
Thanks

Venom351R · Jul 31, 2008

Bigger Cubes FTW!!!

Chythar · Jul 31, 2008

While I haven't installed either, I remember someone here getting a 306 and being really unimpressed with it.. You're only getting 4c.i. over stock so you're not gonna feel much. I also vote for a 331. If you want a 347 CHP has one that doesn't burn oil AND is smog legal (if that's an issue for you).

CHP Shortblocks - search for 347-E for the smog legal kit.

Yobi1Kanobi · Jul 31, 2008

347 or 331

306 if just a fresh motor of what you already have and really it the same money

blksn955.o · Jul 31, 2008

For me it came down to what H/C/I I was going to run. I wanted to keep what I already had and it was ok for a stock stroke. Jumping up in cubes whould have meant a good bit left on the table. For my goals and what I already had I went with a 306.

Yobi1Kanobi · Jul 31, 2008

you cant hurt any combo that i know of with more cubes.

blksn955.o · Jul 31, 2008

What I meant was that really more cubes would in my eyes need better H/C/I to get the most out of it. Yes you can put 185's on a 306 and it will run well...put them on a 331/347 and it will probably run even better yet. If you have say smaller valve edlb. heads or gt40's (iron or older alum.) they will be better matched to a 302 than a 331-347. They will work on a larger motor but IMHO it would be a "weaker" stroker motor. Good numbers can be had...look at killers new setup but his has always been a fairly good runner and I dont see his numbers being the avg. plus even he is moving to larger heads to get the most out of his combo.

That and my goals would be do-able with a 306. If your simply looking for 275-300 a 302 is fine. If your looking for around the 350 mark...stroke it.

It comes down to what the goals are.

StadEMS3 · Jul 31, 2008

I got the DSS 331 kit- strong motor. Only thing slowing me up right now is my stock Cobra intake. I went with the 331 because of the 306, like previously said, is just a freshen up. I've heard of issues with 347s due to oil leaks and pistons are thin at the top.

Yobi1Kanobi · Jul 31, 2008

since they both are just about the same money I say even if you dont have the proper supporting mods now you always can expand.

I went so far with my build I regret not going with a 351 stroked to 427

final5-0 · Jul 31, 2008

347 for the win

Mo cubes is Mo Bettah

Grady

blksn955.o · Jul 31, 2008

I hear you on that...I have a bottle and even with the 302 I should be getting close to the blocks limits, even if I only ever hit 275rwhp off the bottle I have a 175 shot that math is getting close even if I only see 130-150rwhp with 175 jets...add a stroker (and my very strong feelings that a stroker should be done in a aftermarket block) and power adder I would be far to scared for the block.

5spd GT · Jul 31, 2008

Go for the cubes, if you can afford the new rotating assembly and new flywheel/balancer.

I personally went 306 because of a budget, reused a lot of parts and I did not have to buy a new flywheel/balancer.

final5-0 · Jul 31, 2008

5spd GT said:
Go for the cubes, if you can afford the new rotating assembly and new flywheel/balancer.

I personally went 306 because of a budget, reused a lot of parts and I did not have to buy a new flywheel/balancer.

Very good point and as usual .........

The application dictates the end result

Take my sig combo for example

If something happened to my OEM block

A B&Bed 306 would make a lot of sense

My current stuff is too little for a 347
so
A 306 would give me the most bang for the buck spent

You just gotta think this stuff from every angle
and
Long term plans or goals will help you NOT to spend needless money :Word:

If I was gonna build a 5.0 blocked NA STREET COMBO
and
I had to do it from scratch with no current parts

An OEM blocked 347 pumping out 375 to 400 to the wheels would be
great for a week end toy as I see it

Well within the limits for the block
and
You won't break the bank doing it
also
With a good tune ... drivability should be pretty good
even
Fairly good gas mileage for those short road trips

True ... it will lope a bit at idle ... but ... that can't be helped

Grady

nmcgrawj · Jul 31, 2008

Sidebar: its amazing to me how the 347 "oil issues" rumors still exist. I read about that when i first joined this site and guys proved it otherwise. Is that EVER going to die?!?!?!?

final5-0 · Aug 1, 2008

nmcgrawj said:
Sidebar: its amazing to me how the 347 "oil issues" rumors still exist. I read about that when i first joined this site and guys proved it otherwise. Is that EVER going to die?!?!?!?

Sure ... it will die around the same time you quit seeing threads like

How do I put a Fox pcm in my 94-95 Stang

Grady

nmcgrawj · Aug 1, 2008

final5-0 said:
Sure ... it will die around the same time you quit seeing threads like

How do I put a Fox pcm in my 94-95 Stang

Grady

good one! lol

donkey_punch · Aug 1, 2008

or like the famous guess my horsepower threads.

back to the topic.

i also vote for the 331.

Pokageek · Aug 1, 2008

Chythar said:
While I haven't installed either, I remember someone here getting a 306 and being really unimpressed with it.. You're only getting 4c.i. over stock so you're not gonna feel much. I also vote for a 331. If you want a 347 CHP has one that doesn't burn oil AND is smog legal (if that's an issue for you).

That was prolly me, lol. I wanted more low end. Period. The 306 didn't do what I thought it would but it is all a learning process. The stang also FEELS heavy to me and felt heavy with the 306. But I am a streeter too.

94mustangcobra · Aug 1, 2008

347 is my vote

BlackVert · Aug 1, 2008

if gas mileage is an issue, a 306 is probably more likely be a little better than a 331 would be ...

just one more think to keep in mind

if i were doing it though, i'd probably go low compression 311 so i could run 87 octane and have the option of boosting it later.

DSS306 or 331!!!!

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