i was wondering whats the max boost i can run while keeping my stock internals safe? I have the origional 14b and i read that you can turn it up to 18 psi with 550cc injectors, which i have, and it will be fine but wondering if i can go higher...any help would be great.

P.S. buying 16g evo 3 in the winter, just wondering what will get me by for now

 

1. do you have a logger? how are you tuning your 550s?? if you were logging you wouldnt have to ask this question, so im assuming you arent. keep your boost as low as possible so u dont blow anything up until you figure it out. when you start logging, get your car tuned good, then just keep upping the boost until you get knock. with 550s i bet you could go to aroun 18-20psi depending on type of gas, your timing advance, temps, etc
2. 16g isnt much of an upgrade from a 14b. id go 20g if you like old school or 50trim for a next turbo.

 

i have the GM maf translator and i am getting my car tuned on the dyno next week.... so what will my internals hold up to boost wise? what EGT's should i be looking for per cylinder?

 

www.pocketlogger.com
you really need to order one of these and start using it when you get bigger injectors. Dyno tuning your car is fine and all, but any changes you make to your car after that and you need to retune it again. also, dyno tuning isnt going to help much with only a maft because it cant make fine adjustments like an SAFC or dsmlink. Not to mention air temps can also change how your car runs. get a logger and you can tune yourself anytime.

You dont need to worry about stressing your internals, you could run 25+psi on stock internals with a 16g as long as you had enough fuel (bigger injectors and/or race gas) With 550's you should be fine to 18-20psi before your car starts knocking. also, EGTs are useless, they dont tell you anything except that timing is getting pulled, but doesnt tell you by how much. Timing gets pulled when your car is knocking, and if you had a logger it would tell you exactly what your timing was. My advice would be to buy the logger and read up about it instead of going to the dyno. Itl be money better spent.

 

One thing to keep in mind that many people overlook is your elevation. I personally live in denver which varries from 5100ft to 6100 (the track). I forget the equation but you can look it up online, but at my elevation i can safely push 2psi more then sea level due to less atmosphere.

 

true, all my advise is at sea level. but you should always have a logger to monitor timing before pushing your car to its limit. it only takes one WOT run to blow a motor.

 

i upgraded the fuel pump, wal 255, stock 14b and was running 21 psi spike and holding at about 16 psi. good for a 12.9 run. the 14b is very very leathal when tuned. check this out it's great!!

http://www.94tsiawd.com/Goodwill1.html

 

14b is a good turbo. i was just saying that a 16g is only barely biger, and if hes upgrading it should be to a 20g or something similar

 

i did the whole fuel system...walbro 255, aeromotive fpr, 550 RC's so i believe that 18 psi will be ok to run on...but ill look into that data logger thats for the help...btw i have 130xxx miles on stock motor...EXTREMELY well taken care of and old woman owned all of its life...it my head gasket ok to handle 18 psi?

 

i dont think 18psi will do anything to a head gasket... if you are tuned fine. if you are running lean that is another story.