Does my 300 have it??

 

1990 Twin Turbo.

 

How do you tell if it's actually working?

 

Basicly i've had the engine rebuilt and not sure this was done correctly.

 

Also when mapped on a standalone such as a Aem do you need to setup the Vtc in the mapping side of things or is it purely mechanical?

 

Also Vtec on the like of Honda's is used higher up the rev range is this the same for ours?

Yes you have it. Its built into the stock camshafts and cam pulleys, with a solenoid at the back. If you have stock cams and pulleys then there is'nt really anything for the engine builders to do when they rebuilt engine except plug them back in when they fit engine.

 

Dont know anything about the AEM, but yes I expect it would need to be programmed or it wont send the signal to the VTC solenoids.

 

Its only on the intake side, not intake and exhaust like the Vtec system and is not noticeable like the Vtec system which is much more aggressive.

 

Kicks in at 4900rpm standard, but can be raised up the rev range with higher boost.

I have JWT R4+ Cams.

 

The Aem probably isn't setup to use it then.

 

I was hoping it kicked in lower rpm as the car is currently so slow lower rev range and this not being setup may be why. I don't think it's because of the lag due to big turbos the car feels slow until they kick in.

 

E.g. if a NA 300 gave me a drag it would kick my arse until the turbos kick in as something don't seem right lower down the rev range.

I have JWT R4+ Cams.

 

The Aem probably isn't setup to use it then.

 

I was hoping it kicked in lower rpm as the car is currently so slow lower rev range and this not being setup may be why. I don't think it's because of the lag due to big turbos the car feels slow until they kick in.

 

E.g. if a NA 300 gave me a drag it would kick my arse until the turbos kick in as something don't seem right lower down the rev range.

NA will kick a stock TT arse until its turbos kick in ;)

 

Have you lowered your engine compression ratio (Certain forged pistons and thicker head gaskets will give lower compression ratio to enable you to run higher boost). Lower compression ratio will would make off-boost power suffer.

 

Have you had the car fully mapped on a dyno yet. Mapping is the key to good power across the range. If you have had it mapped, do you have a dyno printout so we can see the curve and low rpm power numbers ?

NA will kick a stock TT arse until its turbos kick in ;)

 

Have you lowered your engine compression ratio (Certain forged pistons and thicker head gaskets will give lower compression ratio to enable you to run higher boost). Lower compression ratio will would make off-boost power suffer.

 

Have you had the car fully mapped on a dyno yet. Mapping is the key to good power across the range. If you have had it mapped, do you have a dyno printout so we can see the curve and low rpm power numbers ?

 

Would it really, that's random.

 

Yeap to all, I have the biggest Wiseco pistons for our engines along with 1.2mm Cosmetic gaskets. The car is fully mapped and yeap i have a Dyno print out, will upload it tonight. I don't know how to read them, all i know is it made 520bhp at the flywheel and 575 pounds of torque.

Think they are 88mm pistons.

jeeeeesus, thats a hugh amount of torque!

 

At what RPM is it hitting peak torque???

Here is my dyno chart. dyno