stock bottom end + boost =?

[hacked521]

out of curiousity, how much boost can a stock bottom end on an l series 4 cyl take?

[banzai510(hainz)]

IM sure it can take 6-8 pounds for sure

[Bleach]

If your fuel injection is tuned well enough to not have any detonation then you can likely take a lot of boost.

Its the ping that kills it.

[datzenmike]

The same rod bearing size is used on the KA and they get boosted all the time.

[hang_510]

i know of an L20 w/a stock bottom end that runs up to 13# (and is still running)

[Icehouse]

The bottom end isn't the problem it's the head. Poor cooling which leads to detonation... Some "good" gas can cure that :D I would imagine with a good head gasket and studs with a nice tune it would hold 1 bar without a problem. Dave is running 1/2 a bar, it runs fine but IMO it needs more boost :D Next steps are intercooler, head gasket with good studs and some methanol injection :D :D O shit I almost forgot a better clutch, it's starting to slip an 1/2 a bar.....

[hacked521]

im new to turbo stuff, most of the motors ive built have just been strokers that have compression up the a*@. what do you mena when you say bar? methanol injection is no problem, we run that straight in our racecar. hmmm maybe a methanol injected turboed l motor is in store for the future...im decideing between that and a l motor with a ka24 head...yeah ive seen it before and its different.

[hang_510]

what do you mena when you say bar?

 

a place to drink and BS about datsuns and raise the bar!!!

 

 

 

or maybe...

1 bar = 14.5 PSI

[datzenmike]

0ne bar = 100 kPa (kilopascals) = 1,000,000 dynes per square centimeter OR 0.987 atm (atmospheres) One atmosphere is about 14.7 PSI at sea level.

 

Because it is within 1% of atmospheric air pressure a bar can be roughly considered the same as atmospheric air pressure. One atmosphere is 1.01325 bar exactly. One Bar would be 14.5089 PSI exactly. For most uses they are equal or close enough.

[Phlebmaster]

0ne bar = 100 kPa (kilopascals) = 1,000,000 dynes per square centimeter OR 0.987 atm (atmospheres) One atmosphere is about 14.7 PSI at sea level.

 

Because it is within 1% of atmospheric air pressure a bar can be roughly considered the same as atmospheric air pressure. One atmosphere is 1.01325 bar exactly. One Bar would be 14.5089 PSI exactly. For most uses they are equal or close enough.

 

 

You are SUCH a geek! :lol:

[Icehouse]

Sorry I just said bar because everything nissan does seems to be that way. usually 1/2 a bar for there older turbo stuff.

[Skib]

Sorry I just said bar because everything nissan does seems to be that way. usually 1/2 a bar for there older turbo stuff.

 

ya 7psi is a general stock setting, ZX, older skylines, 200sx, ect

[610SSS]

My l18 seen 25psi when i fitted the boost controller, detonation was plenty but she lived.:cool:

[ggzilla]

Datsun A engine can take at least one bar (14.7 psi) with a stock block. Use water injection or intercooling to avoid detonation/ping.

 

I'm sure the L engine could handle just as much.

[610SSS]

if the motor isnt thrashed or done huge km/miles, then it should handle 1 bar all day everyday.

 

water/meth injection is def the way to go:cool:

[hacked521]

allright then its a water/methanol injection on a turboed l20...thanks for the info!:cool: