Difference in KW's for Man or Auto L77 in Series 1.

[blakethemus]

HSV ever get 325kw from the LS2 (6litre)? I thought they topped out at 317 or something.
Either way the LS2 block in comparison to the LS1 was not so much a leap as the difference from LS2 to LS3.

The LS2 was 307kw. The LS3 was 317kw and 325kw in the GTS.

 

[Smashfist]

camshafts have different part numbers.... AFM v Manual
and the timing in the tune is different because of that (exhausts are the same part numbers)

I'll have to check that I reckon, GM's service info lists only 1 spec for L77 cam specs. I can tell you that rear mufflers are a different p/n though.

 

[crew_man]

Holden L76 and L77 'Generation IV' V8 engines

"Models with the L77 engine and manual transmissions did not have an active AFM system and had a higher power output due to their different camshaft profile."

 

[panhead]

HSV ever get 325kw from the LS2 (6litre)? I thought they topped out at 317 or something.
Either way the LS2 block in comparison to the LS1 was not so much a leap as the difference from LS2 to LS3.

One of the biggest leaps for the L98, L77, LS3 and other variants over the LS1 & LS2 was going from cathedral to rectangular ported heads.

 

[Smitty]

Holden L76 and L77 'Generation IV' V8 engines

"Models with the L77 engine and manual transmissions did not have an active AFM system and had a higher power output due to their different camshaft profile."

.. that is correct (it agrees with the info i got from Holden)

 

[Smitty]

I'll have to check that I reckon, GM's service info lists only 1 spec for L77 cam specs. I can tell you that rear mufflers are a different p/n though.

their parts people show a different cam for auto v manual (dunno about the service info, i have not checked mine)

 

[VFSV6FORME]

Again guys very interesting info.

 

[Smashfist]

their parts people show a different cam for auto v manual (dunno about the service info, i have not checked mine)

Just as a follow up I went digging and threw a few VINs into EPC and our service history - they list the same p/n for camshaft between VE/VF auto/manual.

Confirms what I would have thought - if there was a different camshaft there'd be two different RPO codes for each engine model (aka the L76/L98 in VE).

 

[VFSV6FORME]

Just as a follow up I went digging and threw a few VINs into EPC and our service history - they list the same p/n for camshaft between VE/VF auto/manual.

Confirms what I would have thought - if there was a different camshaft there'd be two different RPO codes for each engine model (aka the L76/L98 in VE).

Interesting and if this is the case what is killing 270Kw's back to 260Kw's?

 

[Smashfist]

I would expect a combo of tuning and exhaust. Rear mufflers are definitely a different p/n between auto and manual - the AFM mufflers are a bit more restrictive and I'd imagine the AFM tune would be a bit more friendly to swapping in and out of AFM.