drago86

I think i just found a misprint in the 86 FSM. the spec page lists the port closing time on the 6-port motor as 70 degrees after, when every other source ive seen list it as 80 after for 86-92 (70 was the gsl-se's aux ports timmings) I even have an SAE paper listing it as 80, also rotaryengineillistraded.com, so is this a typo? can anyone tell me what the 88 manuel says for the aux port closing time?

NZConvertible

You don't say which port...

For NA, as per the 88 FSM:

Primary and secondary intake ports open 32deg ATDC
Auxiliary intake ports open 45deg ATDC

Primary intake ports close 40deg ABDC
Secondary intake ports close 30deg ABDC
Auxiliary intake ports open 70deg ABDC

Exhaust ports open 75deg BBDC
Exhaust ports close 48deg ATDC

drago86

aux port, Thank you for posting that. hmm 88 fsm says 70 too,.. anyone got a 89+ to compare?

adamlewis

89 FSM says 80°

NZConvertible

Yep, S5 port timing is exactly the same except for the auxiliary port closing at 80deg ABDC. SAE were obviously referring to later engines.

drago86

you sure? im pretty sure the aux ports are exactly the same on the 86's and the 89's. I've got the 89 port traced on one of my templates, when i tear down my 86 motor ill compare but as far as i know there the same.

NZConvertible

Go read the FSM...

NZConvertible

DP

White_FC

Edit*: Nevermind...

/me wanders off muttering to himself that he should read posts more closely before he replys.....

drago86

thats the problem i dont believe the FSM...a ll the pictures ive seen of s4 and s5 aux ports look exacly the same. I'll know when i pop the other motor.