307 engine

[dan2286]

Im no master mechanic nor do I claim to be but an engine is an air pump and they are all the same in principle,forced induction or NA.NA makes the power with air FLOWING thru ports,FI makes it by FORCING air thru the ports.Only someone who had no clue about forced induction engines would make a statement that theyre not the same thing at all.....Please explain to me what bit of evidence youve ever seen that backs up what you think.

The engines are the same basic designs, but a forced induction engine uses completely a different theory to build power and make them last. Someone that knows how to build a N/A engine will probably not know how to make power out of a forced induction engine, same thing the other way around. They need different cams, fuel systems, compression ratios, exhaust, etc.

No they do not.

You guys think a turbo or SC is some majic vodoo when it is not...

Then again,im arguing with some fools that think a 307 is even worth building.

You are a TROLL!!

Would you throw a turbo on a gas engine with 11 to 1 compression and expect it to last???

Don't you need a blow through carb when using a turbo??

Don't boosted applications use completely different cam profiles??

With boosted applications, dont you need completely unrestricted exhaust with no back pressure to make more power??

Have you ever built a turbo motor from scratch or do you just bolt parts onto your Grand National??

 

[broke1]

Im no master mechanic nor do I claim to be but an engine is an air pump and they are all the same in principle,forced induction or NA.NA makes the power with air FLOWING thru ports,FI makes it by FORCING air thru the ports.Only someone who had no clue about forced induction engines would make a statement that theyre not the same thing at all.....Please explain to me what bit of evidence youve ever seen that backs up what you think.

The engines are the same basic designs, but a forced induction engine uses completely a different theory to build power and make them last. Someone that knows how to build a N/A engine will probably not know how to make power out of a forced induction engine, same thing the other way around. They need different cams, fuel systems, compression ratios, exhaust, etc.

No they do not.

You guys think a turbo or SC is some majic vodoo when it is not...

Then again,im arguing with some fools that think a 307 is even worth building.

You are a TROLL!!

Would you throw a turbo on a gas engine with 11 to 1 compression and expect it to last???

Don't you need a blow through carb when using a turbo??

Don't boosted applications use completely different cam profiles??

With boosted applications, dont you need completely unrestricted exhaust with no back pressure to make more power??

Have you ever built a turbo motor from scratch or do you just bolt parts onto your Grand National??

Maybe I am a troll but I know more than the guys here....

11.1 on a gas engine turbo'd???There are many TURBOCHARGED smaller dispalcement engines with 10.5:1 comp,indy cars run near 20:1 and diesels run 25:1 Compression is just a limiting factor for how far you can turn the boost up on pump gas

Blow through carb??You need a carb or injectors on any engine....a reg carb will work in draw through,look at VW bug turbo kits

completely differnt cam profiles???NOPE,GN has the same cam as NA

unrestrictive exhaust?Doesnt any car need one to make max power?

Ive built more than the self proclaimed gurus here apparnetly becuase you guys dont know jack sh*t.....

 

[custom442]

Ive built more than the self proclaimed gurus here apparnetly becuase you guys dont know jack sh*t.....

Lol, that's nice. But the topic was should he build a 307 or step up to another size engine. Good for you, turbo builder.

 

[broke1]

no that would be you !
and as for your buick it's called boosting on a buget.i did it to 3 3400 with good results.
and i still stand that there is no replacement for displacement because if i boost my 468 bbc do you think i will not S%%^ all over that 3.8 ??
i was just stating that you can compare a N/A motor to a boosted app .
and if you dont understand that it's not my fault.
bty this is not helping the og poster anymore so respond in anyway you want i am done.

peace

Tell me how come you say turbo an NA need different everything but I just named an example,from the factory,that shows everything you are saying is coming out of your *ss......

boosting on a budget???DUMB *ss.It was the most expensive factory american car besides a Vette in 87

Guys reading this,please dont beleive what some of these idiots are writing.1 minute on google will confirm they dont know there *ss from a hole in the ground

 

[broke1]

Ive built more than the self proclaimed gurus here apparnetly becuase you guys dont know jack sh*t.....

Lol, that's nice. But the topic was should he build a 307 or step up to another size engine. Good for you, turbo builder.

Yep and a few idiots threw there $.02 on turbo's and the info was such stupid mind numbing bullshit,I felt it my duty to correct.

 

[jrm81bu]

 

[custom442]

Yep and a few idiots threw there $.02 on turbo's and the info was such stupid mind numbing bullshit,I felt it my duty to correct.

Some people just don't like it when you throw $.04 in the wrong pot.

 

[88ss408]

i never said that they where different because they have to be built with different parts.that is not what i ment.you can compare them that is what i am saying. something you dont understand ! and i dont expect you to asshat.

 

[88ss408]

...so maybe a 330 bore size is possible but would have to sonic test to be sure

Not even close. You'll hit water first. The 307, 330, 350, and 403 blocks are all unique castings. 330 and 350 blocks (and complete engines) are not very difficult to find, at least not around here (mid Atlantic coast).

gmrocket
Joined: 16 Mar 2005
Posts: 3122

Posted: Wed Apr 15, 2009 10:32 pm Post subject:

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they can go way more than +.060 they usually sonic around .240 to .250 on the minor& .280 to .300 on the major assuming no or little shift. no reason why it couldnt go +.125 or even +.150 depending on what it is your doing. support the bottom&it will be fine

gmrocket
Joined: 16 Mar 2005
Posts: 3122

Posted: Fri Apr 17, 2009 8:08 pm Post subject:

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my 5A 307 heads flowed 195cfm and made 440hp. thats with a drastically reducd port volume. this year for the EMC i need the heads to flow 230 to 235 to get the hp/tq curve i want. the ex is ok at 168