Boost and a L27?
03-01-2005, 12:50 PM
#11
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Originally Posted by jr's3800
Originally Posted by OLDsman105
It'* been 8.5:1 the whole run. No change in compression.
In the middle of the histoy it says
Roller rocker arms, a higher compression ratio, and reduced piston ring tension improved efficiency in 1993.
Now the 3.0 and later 3300 Buick V6'* did use 9.0 to 1 compression... The only change in compression for the 3800 was with the Vin K engine to 9.4 to 1...<---- That they got correct...
I have seen a few sites that have flawed info...
Well there goes my research. Anyway in order to tune the air fuel ratio I will need a AFC 2.0 and a scanner I'm assuming. Would putting on a L67 series 1 throttle body help or hinder the process? And will the L27 injectors hold up or will I have to upgrade the injectors also.
03-01-2005, 01:50 PM
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03-01-2005, 02:03 PM
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Funny, you were at the ******* "meeting".
i'm going to keep my opinion out of this now, and i'll just give you some advice. Read the link that was posted above.
http://www.bonnevilleclub.com/forum/...b958873#264116
i'm going to keep my opinion out of this now, and i'll just give you some advice. Read the link that was posted above.
http://www.bonnevilleclub.com/forum/...b958873#264116
Originally Posted by Dr. Jay
I was just talking to Will (Bill 
) and decided to look up cranks. GM parts direct lists the crank as PN: 24501594 for All application models. Unless there'* some database error that means naturally aspriated and supercharged is the same...which logically would be the case anyway.
) and decided to look up cranks. GM parts direct lists the crank as PN: 24501594 for All application models. Unless there'* some database error that means naturally aspriated and supercharged is the same...which logically would be the case anyway.
03-01-2005, 02:37 PM
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Originally Posted by big_news_1
Originally Posted by BonneMeMN
8.5:1 compression ratio
dished pistons
forged crank
shot peened rods. (l67 has forged rods & pistons afawk)
dished pistons
forged crank
shot peened rods. (l67 has forged rods & pistons afawk)
However, if it can handle 375whp thats probably more than anyone here is looking for. 375whp is WELL over 400 crank hp.
Personally, I wouldn't worry about the bottom end of an L27 unless I was making over 400hp.
Shawn
03-01-2005, 02:47 PM
#15
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Gotcha.... I was just debating whether it was forged or not. But you're right; the ability to handle over 400 crank hp is more headroom than anybody here requires.... at least at this point in time.
03-01-2005, 02:52 PM
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Originally Posted by BonneMeMN
Funny, you were at the f*** "meeting".
i'm going to keep my opinion out of this now, and i'll just give you some advice. Read the link that was posted above.
http://www.bonnevilleclub.com/forum/...b958873#264116
i'm going to keep my opinion out of this now, and i'll just give you some advice. Read the link that was posted above.
http://www.bonnevilleclub.com/forum/...b958873#264116
Originally Posted by Dr. Jay
I was just talking to Will (Bill ) and decided to look up cranks. GM parts direct lists the crank as PN: 24501594 for All application models. Unless there'* some database error that means naturally aspriated and supercharged is the same...which logically would be the case anyway.
) and decided to look up cranks. GM parts direct lists the crank as PN: 24501594 for All application models. Unless there'* some database error that means naturally aspriated and supercharged is the same...which logically would be the case anyway.Boldly stating what you did is a little touchy.
03-01-2005, 02:55 PM
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Ok so from all the information I've read here
1.My L27 bottom end will withstand the extra horsepower
2.5 to 6 pounds of boost is possible with little tuning.
3.my compression information was wrong (I apoligize for that)
4.the bottom end is still under debate I think
Will I need to upgrade my injectors for 4 to 5 pounds of boost?
And what meeting are you guys refering to anyway?
1.My L27 bottom end will withstand the extra horsepower
2.5 to 6 pounds of boost is possible with little tuning.
3.my compression information was wrong (I apoligize for that)
4.the bottom end is still under debate I think
Will I need to upgrade my injectors for 4 to 5 pounds of boost?
And what meeting are you guys refering to anyway?
03-01-2005, 02:59 PM
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Does it really matter if the crank is forged or not? Seriously.
The original question asks if the L27 handles boost. And yes, it does. You shouldn't need to upgrade your injectors with that low amount of boost.
The original question asks if the L27 handles boost. And yes, it does. You shouldn't need to upgrade your injectors with that low amount of boost.
03-01-2005, 03:01 PM
#19
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Originally Posted by OLDsman105
Ok so from all the information I've read here
1.My L27 bottom end will withstand the extra horsepower
2.5 to 6 pounds of boost is possible with little tuning.
3.my compression information was wrong (I apoligize for that)
4.the bottom end is still under debate I think
Will I need to upgrade my injectors for 4 to 5 pounds of boost?
And what meeting are you guys refering to anyway?
1.My L27 bottom end will withstand the extra horsepower
2.5 to 6 pounds of boost is possible with little tuning.
3.my compression information was wrong (I apoligize for that)
4.the bottom end is still under debate I think
Will I need to upgrade my injectors for 4 to 5 pounds of boost?
And what meeting are you guys refering to anyway?
2. Jason says so, but it'* not that simple. You'll have work to do, so buy a good scantool, and set aside alot of extra cash for custom PCM and AFC controller.
3. Compression is as jr's3800 stated.
4. May not ever be settled, especiallty with mis-information and assumptions being posted. More research is needed, but there are KNOWN differences. How much of an effect those differences will make is unknown. Refer to answer #1.