turbo g60 (skyline gt28 turbo??)

[Sam]

Yer as topher said, you need to work a 300bhp engine from bottom to top, TT bearings both ends, stronger rods, stronger pistons, board head (NO GASKET STACKING!) and all the checks and replacements in-between.
 Just break it down in your head to a per rod basis if that makes sense. Its easy to say yer 300bhp engine and look at it as a bit chunk of heavy metal when actually each piston rod and bearing will have 75 bhp on it! Which is more per piston that most 'city cars' have in there entire engine.
 Im all for the idea, and is an awsome project, just think you should be more concerned about making the power properly before how your gonna put it down. 

its a g60 so its low comp and has forged pistons and arp rod bolts. no head gasket stacking needed and a standard g60 head has bigger ports than a standard 8v ( but i am still going to do some work on it anyway) no new rods are needed. these are sufficient for 300. if not we will find out 

anyway the gt28 from a skyline....

Ah sorry, i thought you were on about an 8v and thinking g60 or gt28. 

[dub-addict]

[/quote]

Ah sorry, i thought you were on about an 8v and thinking g60 or gt28. 
[/quote]

nah got my g60 running perfectly and now cant get enough power from the supercharger so looking to upgrade 

[DOA]

A gt28 might be a bit big for a 1.8l 8V engine though it would let you get up near 300 with a few more cc's and a decent 16v head. Take a look at some of the online turbo sizing web pages like http://www.squirrelpf.com/turbocalc/index.php?version=4&target_peak_power=110&engine_disp=0.6&engine_disp_factor=0&target_af=12&bfsc=0.55&max_ic_loss=1&rpm_redline=12000&rpm_peak_power=11000&rpm_max_boost=5000&rpm_min_boost=3000&vol_1=89&vol_2=93&vol_3=95&vol_4=93&vol_1=89&vol_2=93&vol_3=95&vol_4=93&intake_temp_1=90&intake_temp_2=120&intake_temp_3=135&intake_temp_4=140&turbo_n=1&map_sel0=18&map_sel1=19&map_sel2=20&map_sel3=21&map_sel4=22&map_sel5=23&map_sel6=24 .

That will give you a rough idea of what boost you will need to run, a vague idea how much heat you will have to drop through the intercooler (ie how big) and will let you plot all of your info on any one of a few gt28 sized turbo maps. Just remember to be realistic with the VE figures as these will be a bit lower than for a 16v engine.

Another one thats handy is http://www.not2fast.com/turbo/glossary/turbo_calc.shtml?FeetASL=0&Tamb=21&Bore=84.45&Stroke=89&nCyl=2&RPM=6300&VE=95&Boost=14&Ec=80&Eic=80&PdropIC=2&TambIC=21&wiPercentMethanol=50&wiRate=100&wiTemp=21&SFC=0.5&AFR=13&maxInjectorDutyCycle=85 which will give you an idea how big your injectors will need to be as well. Only problem with that is they dont have any gt28 framed turbo maps.

BTW, if you look on http://www.turbobygarrett.com/turbobygarrett/products/turbochargers.html#small you might be able to find the actual turbo that you have in there and its maps.

[Gaaables]

Another thing to think about is what kind of boost pressure your gonna be running to acheive 300bhp?! I know that on the gtr turbos the exhaust wheel is only bonded on and not bolted, so these turbos can run any more than a bar, I veleive this to be the same on the gts turbo

[dub-addict]

A gt28 might be a bit big for a 1.8l 8V engine though it would let you get up near 300 with a few more cc's and a decent 16v head. Take a look at some of the online turbo sizing web pages like http://www.squirrelpf.com/turbocalc/index.php?version=4&target_peak_power=110&engine_disp=0.6&engine_disp_factor=0&target_af=12&bfsc=0.55&max_ic_loss=1&rpm_redline=12000&rpm_peak_power=11000&rpm_max_boost=5000&rpm_min_boost=3000&vol_1=89&vol_2=93&vol_3=95&vol_4=93&vol_1=89&vol_2=93&vol_3=95&vol_4=93&intake_temp_1=90&intake_temp_2=120&intake_temp_3=135&intake_temp_4=140&turbo_n=1&map_sel0=18&map_sel1=19&map_sel2=20&map_sel3=21&map_sel4=22&map_sel5=23&map_sel6=24 .


thanks for those links. they are coming in very handy indeed 
That will give you a rough idea of what boost you will need to run, a vague idea how much heat you will have to drop through the intercooler (ie how big) and will let you plot all of your info on any one of a few gt28 sized turbo maps. Just remember to be realistic with the VE figures as these will be a bit lower than for a 16v engine.

Another one thats handy is http://www.not2fast.com/turbo/glossary/turbo_calc.shtml?FeetASL=0&Tamb=21&Bore=84.45&Stroke=89&nCyl=2&RPM=6300&VE=95&Boost=14&Ec=80&Eic=80&PdropIC=2&TambIC=21&wiPercentMethanol=50&wiRate=100&wiTemp=21&SFC=0.5&AFR=13&maxInjectorDutyCycle=85 which will give you an idea how big your injectors will need to be as well. Only problem with that is they dont have any gt28 framed turbo maps.

BTW, if you look on http://www.turbobygarrett.com/turbobygarrett/products/turbochargers.html#small you might be able to find the actual turbo that you have in there and its maps.