I am about to buy being the body of an '88 midnight blue Turbo II and a 91' S5 J-Spec Turbo II motor with only 35k on it. The car already has Racing Beat dual-exhaust installed.



My questions are..



What's the stock boost on the J-Spec motor? What's the highest boost I can push safely? Is there any way to turn up or down the boost without a boost controller?



What's the first thing I need to buy? Boost contoller? AFC? Fuel-Cut Defenser? Blow-Off Valve? Boost Gauge? Walboro 255 Fuel-Pump?



(I think my brother has a spare Walboro 255 from his SR20DET...)



What are the advantages/disadvantages of the S4 body?



What are the advantages/disadvantages of the S5 J-Spec Turbo II motor?



ANY tips/suggestions would be greatly appreciated!

Thanks for reading this! https://www.nopistons.com/forums/pub...DIR#>/cool.png

I think stock boost is 8 donno for sure though wouldn't want someone saying im lying again. https://www.nopistons.com/forums/pub...DIR#>/wink.png



First things you should get...



FCD

boost guage

boost controller



If your bro has a spare walboro 255 fuel pump take advantage and get it off him.The S4 body is like 200lbs less than an S5 body.The advantage of a S5 motor is they have 14hp more (ain't ****) and the disadvantage would be the electrical system.



Good luck

Stock boost on an s5 t2 is 8.5 I believe; Its somewhere real close to 8.



Stock fuel limit is near 235-240rwhp. Intercooler upgrade is recommend beyond 12psi.



You can only turn boost up with a boost controller. You need to port the wastegate if you want to turn boost down, or have the abilty to control lower boost levels.



Walrbo 255lph is a great pump, good for 500flywheel hp. Slap it in.



Advantage of an s4 body are replaceable front ball joings, 200#s less vs s5.



Advantages of an s5 t2 motor, can handla lot more power than s4 motors; Front and Rear irons are reinforced. S5 rotors are lighter and higher compression; more power and safer to rev higher. Stock rev limiter is set at 8k vs 7k I beleive.



Suggestions? Standalone ems right now...

all the t2's have a 7k redline, due to the turbo not making any power up anywhere near that high

Just s5 n/a have 8k right?

My 88 has 8k. I think it is an S4. Not really sure.

just s5 na 5spd