Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

305 sbc...

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Old Apr 7, 2009 | 04:41 PM
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know a guy that had a 630rwhp fox body with a 302.
howver a 5.0 windsor comes with a 4.00 bore, and the guy had some ford racing alum. heads, with cobra intake, made the power thru a th400
and t76 turbo
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Old Apr 7, 2009 | 04:55 PM
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Originally Posted by ZONES89RS
No, but it is a major player, you dont see 496 BBC motors running with 540s and 565s, just like there is a reason no one uses a 305 for real competition.
Sure it is, but it's role is greatly reduced with forced induction. Even the import guys are making 1000hp with 3L I6's. No reason a 305 Chevy would be a "waste" like everyone thinks it is. IMO, that's ignorant thinking. Like I said earlier, we are not talking "real competition," we're talking street cars. I don't think there's enough of a difference between the two to be concerned about for a turbo street car.

Originally Posted by ZONES89RS
You you can make power, bit anything will, there is a saying:

"You can take junk, and make it fast, but in the end all you have is fast junk."
Back when our country was just getting started, someone said:

"Experience must be our only guide. Reason may mislead us."

The point there is that commen sense isn't always true. I asked for experience, if anyone had done it before. So far, all I've gotten is reason.


Originally Posted by ZONES89RS
No knocking you all the way, but for christ sake, why would you even want to argue that a 305 can make the power of a 350, bigger cubes, bigger valves...it all come into play. A smaller engine can make as much as a bigger engine, if it spins high enough, but you spin that bigger motor just as high with the proper matched components, you still have more power than the smaller engine. This is of course speaking of the same motor design.(ie:5.0/5.7/6.6:LS1/LS2/LS7:4.6/5.4) So, tell the guys on this site a ******* LS1 will make as much or more power than a LS7 and you will get flames to ****...maybe banned.
I didn't want to argue, you did. I asked if anyone has done, not how it could compare to a 350. YOU brought that up, not me.

I never even mentioned RPM, I am only taking into consideration displacement and boost. Valve sizes are negligable for a turbo motor. Port flow is negligable. Swirl/tumble/quench/etc...all negligable when you have an air compressor cramming air through the inlet. I'd even venture to say that as far as a turbo motor is concerned, the most important aspects of the cylinder head is valve, guide, and seat material.

With that said, sure, it is possible an LS1 could make as much or more than an LS7. It all depends.
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Old Apr 7, 2009 | 04:57 PM
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Originally Posted by 1_bad_TA
Depends on what kinda budget your working with. If your pretty tight with money, put the right parts into it and you can have a fun setup. If you got money to burn, with the prices of 350 2 or 4 bolt main blocks, your better off. What do I know though, my post count and itrader isn't that high.
I think that makes you more credible these days, haha.
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Old Apr 7, 2009 | 05:03 PM
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i know a stock 4.8 with upgraded springs, pump, and rod bolts made 700rwhp
and the engine dimensions for 4.8 are 3.786 x 3.268
this member on turbomustangs posted a dyno graph. of the engine.
with a 88mm turbo. it was in a truck thru auto trans.
alot of ppl didnt think the 4.8 would even turn the 88mm over. lol
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Old Apr 7, 2009 | 05:06 PM
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Originally Posted by NemeSS
i know a stock 4.8 with upgraded springs, pump, and rod bolts made 700rwhp
and the engine dimensions for 4.8 are 3.786 x 3.268
this member on turbomustangs posted a dyno graph. of the engine.
with a 88mm turbo. it was in a truck thru auto trans.
alot of ppl didnt think the 4.8 would even turn the 88mm over. lol
That's awesome! Where'd it spool up, like 4000? LOL
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Old Apr 7, 2009 | 05:25 PM
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Originally Posted by KCS
Sure it is, but it's role is greatly reduced with forced induction. Even the import guys are making 1000hp with 3L I6's. No reason a 305 Chevy would be a "waste" like everyone thinks it is. IMO, that's ignorant thinking. Like I said earlier, we are not talking "real competition," we're talking street cars. I don't think there's enough of a difference between the two to be concerned about for a turbo street car.



Back when our country was just getting started, someone said:

"Experience must be our only guide. Reason may mislead us."

The point there is that commen sense isn't always true. I asked for experience, if anyone had done it before. So far, all I've gotten is reason.




I didn't want to argue, you did. I asked if anyone has done, not how it could compare to a 350. YOU brought that up, not me.

I never even mentioned RPM, I am only taking into consideration displacement and boost. Valve sizes are negligable for a turbo motor. Port flow is negligable. Swirl/tumble/quench/etc...all negligable when you have an air compressor cramming air through the inlet. I'd even venture to say that as far as a turbo motor is concerned, the most important aspects of the cylinder head is valve, guide, and seat material.

With that said, sure, it is possible an LS1 could make as much or more than an LS7. It all depends.
Show me a I6 import making 1k HP on pump gas, i ******* dare you.

There is a reason no one does much with a 305, it is that simple. It is a waste, no matter how you look at it when power is a goal, so, not considering the valves, and all the other bullshit like you said, cubic inches makes more power, especially in this case, the only upside i can give a 305 over a 350 is a lighter piston, big ******* deal.

BTW, a LS7 can make 750 FWHP or more on all motor, lets see you do it with a LS1...not going to happen. Lets see your stupid bullshit about boosting the **** out of it to make what a boosted LS7 could do...you got a broken *** block. Good luck with figuring that out too.


Thought it was negligible not negligable.
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Old Apr 7, 2009 | 05:52 PM
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Originally Posted by ZONES89RS
Show me a I6 import making 1k HP on pump gas, i ******* dare you.
Show me where I said that was with pump gas...I ******* dare you.

Originally Posted by ZONES89RS
There is a reason no one does much with a 305, it is that simple. It is a waste, no matter how you look at it when power is a goal, so, not considering the valves, and all the other bullshit like you said, cubic inches makes more power, especially in this case, the only upside i can give a 305 over a 350 is a lighter piston, big ******* deal.
Don't forget the smaller bore. Unless, you don't know.....

I think the reason no one uses a 305 is because of ignorance, and I think you're proving that for me. You can make more power than you'd ever need with either one for a street car, so it REALLY doesn't matter. After that it's more of a question of which block is stronger or has less core shift, IF you can get that power to the ground. Or if you're trying to win a burnout contest.

Originally Posted by ZONES89RS
BTW, a LS7 can make 750 FWHP or more on all motor, lets see you do it with a LS1...not going to happen. Lets see your stupid bullshit about boosting the **** out of it to make what a boosted LS7 could do...you got a broken *** block. Good luck with figuring that out too.
LOL, like I said...it all depends. I've seen an LS6 make 780hp to the tires on motor. It depends on the setup. The LS7 has it's drawbacks, which the LS1 can take advatange of. Once boost comes into play, it's a whole new ballgame. You do understand why titanium parts are BAD in extreme heat situations...right?

Originally Posted by ZONES89RS
Thought it was negligible not negligable.
It sure is! Thanks.
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Old Apr 7, 2009 | 06:05 PM
  #28  
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Well ****, we are talking street cars, pump fuel, anything can make 1000 HP with tons of boost and and the fuel to keep it going.

If you do the same thing to a 305 and a 350, high dollar parts and all, you are simply ******* nuts to think a 305 will hold a candle stick to it in the short or long run. Then you are kicking yourself in the nuts saying that a 305 will do fine for the street when a 350 will last longer at the power level you want, less wear on internal parts.
You know there is a reason there are engine size restrictions in every class that runs power adders for a reason right? Because more cubes makes more power.


****, if if was a fifth of vodka, you would be dead from alcohol poisoning.
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Old Apr 7, 2009 | 06:26 PM
  #29  
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Originally Posted by ZONES89RS
Well ****, we are talking street cars, pump fuel, anything can make 1000 HP with tons of boost and and the fuel to keep it going.

If you do the same thing to a 305 and a 350, high dollar parts and all, you are simply ******* nuts to think a 305 will hold a candle stick to it in the short or long run. Then you are kicking yourself in the nuts saying that a 305 will do fine for the street when a 350 will last longer at the power level you want, less wear on internal parts.
You know there is a reason there are engine size restrictions in every class that runs power adders for a reason right? Because more cubes makes more power.
Oh, I guess you're not familiar with Outlaw 10.5 racing:

Rules
Engine
Any engine size allowed. Limited to single automotive type engine.
No C drive screw blowers allowed
The Max overdrive on any blower combination max 100 percent
Turbo combination limited to 91 mm any turbo over 91 mm must have approved reducer of 91mm

It seems they have NO LIMIT on engine size, but wait....they limit the power adder??!!

Like I said, for a street car, I don't think there is enough of a difference. Taking into account the 350's displacement advantage and the 305's ability to take more boost, I think it would be negligible, and neither would have much of an advantage over the other.

Originally Posted by ZONES89RS
****, if if was a fifth of vodka, you would be dead from alcohol poisoning.
If *what* was a fifth of vodka?
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Old Apr 7, 2009 | 06:37 PM
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305 better in ANY way to a 350? hahahahaha why do you think 90% of third-gens are slow? because they have a 305, that cannot compete with a 350, dollar for dollar, part for part, psi for psi. if you have a 305, cool boost it till it explodes, and then, for LESS money than it takes to build a 305 because 305 parts cost more than 350 parts, yes its true - been there, build a 350 that will outperform the 305 you could have built and still save money.

a 305 take more boost? at what boost level does that come into play? 30+? like you'll EVER get that high anyways.

and before ANYONE says a 305 is a "unique" thing, look at this:

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Old Apr 7, 2009 | 06:43 PM
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Well said, even if a 305 could take more boost, you will never put it in a situation to find out.
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Old Apr 7, 2009 | 06:50 PM
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Here are your Ebay pistons.

http://shop.ebay.com/?_from=R40&_trk...All-Categories

None worth a ****, so the extra money for some is going to be hard to find i guess for something to actually stay alive with boost...there goes that money thing again.

There are some out there i am sure...cannot wait to see the price.
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Old Apr 7, 2009 | 07:00 PM
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Originally Posted by Tx91z28
305 better in ANY way to a 350? hahahahaha why do you think 90% of third-gens are slow? because they have a 305, that cannot compete with a 350, dollar for dollar, part for part, psi for psi. if you have a 305, cool boost it till it explodes, and then, for LESS money than it takes to build a 305 because 305 parts cost more than 350 parts, yes its true - been there, build a 350 that will outperform the 305 you could have built and still save money.

a 305 take more boost? at what boost level does that come into play? 30+? like you'll EVER get that high anyways.

and before ANYONE says a 305 is a "unique" thing, look at this:

Cute picture. Again, all I hear is reason. The 305's smaller bore would allow more boost, or compression, for ANY given fuel. Where a 4" bore would detonate, the 3.756" would not. I thought this was a well known FACT...

Looking at experience, and the power levels the modular fords are making with their small ~3.5" bore, I see no reason to assume a 305 would be a waste to put money into. Experience shows that a sub 350ci engine can make more than enough power for a pump gas street car, even with small bores, but you guys act like there is some invisible wall, or unrelenting law of physics, that says a 305 will not make power. But I don't really see any good arguements to prove your point.
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Old Apr 7, 2009 | 07:07 PM
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I didnt say it wouldnt make power, it is just cheaper and more cost efficient to build a 350, not to mention READILY available parts. <<<----there is my point.

You gotta be driving a ****** honda.
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Old Apr 7, 2009 | 07:09 PM
  #35  
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Reminds me of a friends response to a joke about his genitals, he stated,"Its not the cubic inches, its the bore and the stroke."


Lets see this better smaller 305 make more power than a 454 with a turbo? What is your answer to that?
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Old Apr 7, 2009 | 07:14 PM
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Originally Posted by ZONES89RS
Here are your Ebay pistons.

http://shop.ebay.com/?_from=R40&_trk...All-Categories

None worth a ****, so the extra money for some is going to be hard to find i guess for something to actually stay alive with boost...there goes that money thing again.

There are some out there i am sure...cannot wait to see the price.
Haha, is that where you shop for pistons? Ebay!? Haha, that explains a lot.

Actually, I am pretty sure I had said "custom", but luckily since it's a SBC, it won't be all that custom or expensive. Basically the same as a dish/reverse dome piston for a 383, but in a 3.756" bore size. All the "engineering" involved would basically be taking the CAD rendering of their low compression 383 piston, and scale it down. Haven't priced it, but I really don't think it would be that much extra. It's not a total redesign or anything.
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Old Apr 7, 2009 | 07:15 PM
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Well, MFSOB, i cannot find decent slugs for a 305 anywhere...****, i thought i would find something off the shelf somewhere.
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Old Apr 7, 2009 | 07:19 PM
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You still didnt respond to the fact i didnt say it wouldnt make power. Or if it would make more power than a 454, how about a 400 SBC?

Just still dont get why you think a 305 will make more power, under any conditions other than a 350 having a disadvantage of shittier parts.
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Old Apr 7, 2009 | 07:23 PM
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Originally Posted by ZONES89RS
I didnt say it wouldnt make power, it is just cheaper and more cost efficient to build a 350, not to mention READILY available parts. <<<----there is my point.

You gotta be driving a ****** honda.
I'm pretty sure you described it as "a waste," "boat anchor," "junk." I think you're wrong...that's my point. Remember, I just came to ask if anyone has made any power with a 305 Chevy. You are the one who immediately felt the need to interject your ignorance.
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Old Apr 7, 2009 | 07:26 PM
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This was my opinion, i have sunk money into them, and it didnt pay off.


Originally Posted by ZONES89RS
Well, assuming the logic of 1.5 HP per cube, 400 HP is not impossible, but a 350 will make 450. Other than that, boat anchor.

So go build a ****** 262 V8 since it would make even more power you special fella.
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