What do you guys think ab out ths setup, and none of that swap your 305 for a 350 stuff im keeping my 305.. I have a 1988 T/A 305TPI with 700R4 and 323 posi.. Mods as of now are listed below.. I am rebuilding the engine but also making it a 335 stroker, adding 52mm throttle body, ported polished and simeased plenum, simeased slp large tube runners, 22lb injectors, accel super ram intake manifold, sportsman II heads(64cc), some kind of good cam to match the rest of the setup not sure what duration or anything yet, adjustable fuel pressure regulator, better fuel pump. Also rebuilding tranny and adding a good shift kit. Already have a good exaust setup for this, but will probrably have to have a chip specially burned for me.. This should yield some good power from a 305TPI.. So what doesn everyone think... thanks..

 

Spending that money to make a 335 is a bad decision.

A 350 short block is cheaper than that stroker kit. For less money, you can have more. I admit, I'm an idiot, and I'm pretty much a novice at this motor stuff, having only been doing it since a decade or so before any of these cars existed; but I have yet to see the first good reason to spend more money in order to get less. That applies to motors just the same as it does to food or housing or anythign else.

Do the arithmetic. (It's not even math, it's simpler than that) It will cost you more to make your "free"" "paid for" 305 into a 335 than it will to buy a 350 and rebuild it; and a 350 will blow a 335 away, every time, given the same stuff around the cylinders (cam, heads, exhaust, etc.).

Skip the runners, you don't need them with a SuperRam. Spend the money you saved by building a 350 instead of a 335 on some better headers than the Edelbrocks, such as SLP 1¾", and some PROM burning equipment instead of a chip. The difference betwen those 2 things is alot like the difference between buying a fish, and a fishing pole; and "I'm hungry right now" isn't an excuse.

 

You know what! I have seen this way to many times. The guy asked for help on rebuilding a 305! He even specifically asked that no matter how much it might not make sense, for people to accept it and stick to the subject. But the very first damn person has to go and start this battle that we've all seen for months and months, that will just get locked.

SO just help the man and keep your damn opinions to yourself if they arent helpful! This Board is to help people not discourage, make fun of or irritate people.

RB83L69, youre right about the logic in your eyes and situation. Maybe he doesnt see it that way or doesnt want to.

DreamState21x Good luck and have fun on that 305!

Now that Ive vented

PEACE!

 

If I were you I'd stick with some 58cc heads like World Products S/R Torquer 305 heads, and maybe clean up the bowls a little bit.

That should keep your compression around 10:1.

 

You wanna know why a stroked 305 is a bad idea. He can't use those heads with a 305s small bore. Some plan, he's picking parts like he's building a 350. So why not spend the $50 on a 350 core, skip the stroker crank kit and make more power for less money. And use good parts instead of being limited to a small selection of small valve heads.

 

As the motor will still be only 335 cu.in. and the bore still only 3.75" you most likely will not need a 52 mm TB, esp. since your ex tube is only 2.75". The runners, well, I don't think you'll be moving that much air (BTW did you mean AS&M large tube semi-siameased, AS&M siameased or the SLP runners which are not especially large tube or siameased?). Staying with the 305 limits you to it's bore dimensions which in turn limits your airflow. No arguing with physics. The best thing you could probably spend your money on is the heads. That is probably the one biggest restriction that can be manipulated with a bolt on part. Remember, that TPI was specifically designed for the 305. Knock 'em all you want, but GM engineers do know a thing or two more than we.

Let me also, going against convention, say I'm with RB. Logically as well as monetarily it makes no sense. SSE, he asked we not tell him to swap out the 305 for the 350, not tell him <i>why</i> building a 305 to 335 is a bad idea.

 

Yeah, I'm sorry, but I just couldn't help it. It's just such a bad idea, and goes so far backwards in dollar value, I feel morally obligated to at least try to help rescue people from themselves.

 

That is definitely acceptable, and within boundaries. He's just lookin out.

 

maybe he just wants the challenge.........

 

Just use the parts that have been proven to work best on the 305. (World products s/r torquer 305 heads, ported and polished) I thought I heard that you can use these on a 350 too, is that true? In that case you're not really wasting money as long as your using only parts that can be reused on a 350 later on. I wouldn't waste the money on that stroker kit though. You could always save that money for later on when you decide to upgrade to something else. What condition is the 305 in right now? If it's running good why not leave it as is and just swap heads and cam? The 305's seem to last a long time anyways. You could have fun with it until it's worn out and then swap everything onto a rebuilt 383.

I'm not telling you what to do, this is just a suggestion. I don't know what your financial situation is or what your future plans are for the car. Whatever you do, have fun.

 

I'd agree with TunedPort 335. Don't use Sportsman II heads. The valves are too big, and the 335 will NEVER use the flow. If anything, building a 335 is to increase torque (which doing to a 305 is silly, but whatever). The smaller runners and valves of the S/R 305 heads are what you need to increase torque.

Just remember that building a 335 will ONLY increase torque with TPI. It will never be a +5000 RPM engine, no matter what heads or "stealth" system you use. The bore is WAAAAAAAY too small. Sure a 335 will give more HP than a 305, but it will increase torque more than anything. Take advantage of that (as much as you can) by using the right cam, heads, and induction setup. Don't try and make a 400 HP 335. It ain't gonna happen.

If you want to be 'different' or 'unique', save your money and just build a stout 305. To add to RB's fishing comment...... don't try to catch catfish with a fly rod. You won't get any and you'll be left with a sore arm.

 

A lot of folks find that they really like the LT1 cam with a 305, so it should work very well with a 335 as well. They are always available on eBay for around $50.

And, of course, I recommend heartily that you try porting your 305 heads yourself. Follow the link at the end of my sig.

 

I have heard you can take a 305 and overbore it to 350... yes no?
could you guy enlighten me

 

No. It would require more than a quarter inch of over-boring and that just ain't available.

 

Thanks for everyone's opinions.. I was just curious on what everone thought of my idea.. I am keeping my 305, yes I like the challenge of building a very fast 305(which is possible), And you gotta love the look on peoples faces when you beat that 3rd gen 5.7 and tell him it's a 305.. I do.. And you can't tell me you wouldn't be impressed with a 305 that beats the pants off a 2002ws6 at the track.. I ve seen it and I was very.. Im not looking for 400hp(yet) but 300-320 is very fisable with this setup.. Then in a few years a power charger.. About the heads im not sure about keping 58cc heads, that makes 10:1 compr with this setup and this is a daily driver car and gas is just getting more expensive. But thank you for the info on the torqer heads I will look at the specs on those, thank you.. And for you 350 people yes I know what they are capable of, I have a 98ws6 running 11's.. O and about the bore, it is also being increased by.30 (30 over) maybe.. Thanks everyone, and have good one..

 

.

 

Tunedport335, nice job on the engine and the plenum and runners look great.. How did you like the improvment after the stroker kit.. You have a good setup but you would be suprised how much hp is still bottle inside that engine, you get just the right amount of gas in there *which is more than your getting now" and some more air, and air flow(pressure), and you've got a nice red rocket there.. Very nice job on the car so far tho.. take it easy..

 

I wasnt snapping on you. And Im glad to see this one was all about helping I just know that all of us had seen several of 305-350 things locked out. I was just frustrated because the first thing he said was dont even bother bringing up the word 350. So Im sure he knew about it already. But at least you were looking out for him and not trying to stir up anything.

DreamState21x Good luck on that engine and hope you do well with that project.

:hail: Camaros! and firebirds and anything other than a mustang!

 

Im suprised no one mentioned Alum Vette heads from a L98?

Perhaps I just can't read, but wouldn't that be better then stock ported or s/r's, they are Alum making them lighter, and the external egr in't to hard to deal with.

and remember traction is keep no sense having a 300+hp 305 if you have the same problem as he guy with a 350 spinning your wheels.

and good luck

 

I haven't been able to open it up since my motor isn't broken in yet, but at low rpm's it feels very torquey.

Like someone already said, build the 335 or 305 for torque... not horsepower. You can make them quick it just depends on if you put the right parts in it.

Thanks for the comments on my car BTW

Good luck