sc overdrive

try2v8

Registered User
what is the reason for not overdriving the 89 sc more than 15%. is it a overheating issue?? if so can it be overdriven more than 15% if a snow kit was installed?? thanks
:confused:
 
what is the reason for not overdriving the 89 sc more than 15%. is it a overheating issue?? if so can it be overdriven more than 15% if a snow kit was installed?? thanks
:confused:



Noone is saying you cant do it. But the SC is working hard with the stock inlet and the poor design of the inlet from the early blowers.

Basically you starve the SC of air since the inlet and TB cant supply it with the demanded air. This cavitates the blower "vacuum right before it". This condition makes the SC work hard and less efficient, heat starts to build up=poor air to make HP. This drag on the SC makes it consume more HP and at the same time you get crummy less dense air. But if you can cool it down enough to make use of it. It can provide you with ok results.
What you will be able to get with the 15% is more torque sooner in the RPM. But then you loose top end.

What would you rather have?
 
Size does Matter!

The 89-93 stock M90 has the smallest inlet size to the blower, so therefor can't pull enough air, so the SC cavitates, and builds heat very quickly. No amount of snow injection or intercooler size really helps because the blower is just so inefficient with such a small inlet to the back of the SC rotors.

This is only one reason and other will probably chime in other reasons.

94-95 SC's had a little better SC inlet opening and performed better with an same amount of OD, but still can't go crazy on those until it has been ported.

Smitty
 
Thanks

Ok thanks to all for the answers. Running low on funds for this year and was looking ffot a way to not buy a differant sc. But thank you.
 
Back
Top