on a 87 tII

 

7-8 psi max

 

stock is 5.5-6

 

I thought the highest boost level stock was 7.7?

 

Sweet... Server is doing great.

 

Cool, three wrong answers...

Stock max boost for a S4 is 6.56psi as per page 4B-9 of the FSM. S5 is 8.25psi (page F2-9). This is for a stock car in mint condition, of which none exist any more. Clogged cats and tired turbos will mean stock cars don't boost this high any more, but modded cars will have no trouble getting higher.

 

1 last guestion how come when i get the rpms up my turbo reads near 40 psi

 

the stock gauge isnt in psi

 

40 (x10) mmHG.

 

lol

 

I wish, 40 PSI would rock on any car LOL!

 

Read what it says on the gauge. It's calibrated in tens of mmHg, so "40" is 400mmHg or 7.7psi. Stock max boost is about 340mmHg, so your boost is normal.

If you have modified or are planning to modify your car, you should get an eftermarket gauge. The stock gauge is useless for taking precise readings, particularly if you're past the top of the scale.

 

thank you very much hey guys this is my 1st rx7 so i'm sorry i don't know that much thats y? i'm asking guestions thanks nick

 

Well good luck and please for the love of god take care of your car and be smart modding it.

 

i will i'm leaving it stock so far since i bought the car i had to replace the engine i got 1 off here and it came with a racing beat catback but i want to get the downpipe and the cat replacment thanks guys nick