Late model SV6 Tuning

[Jarp]

Yeah but in the US peak is @ 5900 or something stupid. So low in comparison to the way the Camaro is tuned. I don't need to peak torque lower in the rev range as I have a 3.7 diff...works well as is but as I said I'll check with my tuner about the spacer and its use with a DI.

 

[kuzman89]

yeah but the camaro has peak torque of 380nm or something, so probably has 350nm at 2900 anyway.

 

[soop]

CAI been done for months. The DI is a little different as fuel/air not premixed in the manifold because fuel is put directly into the combustion chamber in liquid form. So spacers may act as a cooling mechanism for the SIDI but possibly not much extra gain if CAI already applied. As far as increased runner lenghth goes I already have a car with a low torque peak so will check with my tuner on this.

Ah fair enough, the extra runner length will still of benefit. The airspeed behind the valve will be increased.

Low peak is just off idle

 

[Jarp]

"Low peak is just off idle "

Yeah fair enough..guess ya can't argue with any torque gains ...but just want to get the headers, speedo calibration and tune out of the way 1st. Will think about other stuff later.

 

[soop]

The runner length will effect the tune though mate. That's why I suggest it prior.

Extractors are definatly the way to go, what sort are you going to use?

 

[Jarp]

The runner length will effect the tune though mate. That's why I suggest it prior.

Extractors are definatly the way to go, what sort are you going to use?

As per post 79.

 

[soop]

Ah I didn't see that.
Even though there is absolutely no information regarding the design on their website. Top effort pacemaker!

Do you know if they're 4-1 or tri-y?

 

[kuzman89]

4-1 would be for V8's not V6's.

 

[Jarp]

Dunno...does this help. Pipe over cone design, all pipes are mandrel bent, all flanges are precision laser cut, painted in the distinctive PACEMAKER heat proof blue. 1 5/8” Primary Pipes, 2 ¼” Flanged Outlet.

Also says Y Branch N/A.


Ahhh true Kuzman so does that mean has to be tri-y as I've no idea.

 

[soop]

4-1 would be for V8's not V6's.

You know what I mean, tuned length 4-1 same/same.

I'm going to guess and say they're tri-y.