Stages of tune...
Discussion
Lowest curve was 383ci with 224 cam flowed 853 heads, LS2 intake and 90mm throttle body.
Middle curve was 416ci with 11.5:1 compression, Self ported Dart 225 heads, 233/237 cam, LS2 intake and 90mm throttle body, pistons are Mahle with 5cc reliefs machined to match my Cathedral valve set up, Callies rods with the crank rebalanced, LS7 standard clutch.
The top curve is as above but with 244/257 cam and a ported FAST intake.
Not sure on the Thunder Road thing yet, i have to get 3rd gear done soon as it is going crunchie!
Middle curve was 416ci with 11.5:1 compression, Self ported Dart 225 heads, 233/237 cam, LS2 intake and 90mm throttle body, pistons are Mahle with 5cc reliefs machined to match my Cathedral valve set up, Callies rods with the crank rebalanced, LS7 standard clutch.
The top curve is as above but with 244/257 cam and a ported FAST intake.
Not sure on the Thunder Road thing yet, i have to get 3rd gear done soon as it is going crunchie!
Edited by Brummmie on Sunday 30th August 10:46
Would have been interesting to see the results with the fast90 and smaller cam. By all accounts the LS2 intake is the worst LS intake to use.
What ECU are you running mate? The curve gets a bit wobbly near the top, do you think there is more to be had with fueling and spark work up there?
What ECU are you running mate? The curve gets a bit wobbly near the top, do you think there is more to be had with fueling and spark work up there?
ringram said:
Would have been interesting to see the results with the fast90 and smaller cam. By all accounts the LS2 intake is the worst LS intake to use.
What ECU are you running mate? The curve gets a bit wobbly near the top, do you think there is more to be had with fueling and spark work up there?
I have emerald K3, which is fully adjustable, it made slightly more at the top with a bit more ignition, but i feel it was right on the edge so backed it off a couple of degrees. My LS2 manifold was ported, i got rid of all those nasty ridges where they are bonded together. I dont think the FAST alone would have given me 60+bhp on its own??What ECU are you running mate? The curve gets a bit wobbly near the top, do you think there is more to be had with fueling and spark work up there?
Thanks for this great info Paul. It gives me a few pointers for my 418. Whats the score with low speed/ low rpm driving with that big cam and whats the idle like???
ETA: (Any measurements on the vacuum at idle?)
This is important to me as I have just had a cam spec'd based on not losing too much vacuum due to overlap, but we like the look of the new Comp LSr stroker cams.
Also what was the lift at .050 on the big cam?
BTW I like what I see, and its exactly what I'm looking for - 500RWHP with torque to match.
More questions (tell me to bugger off if you like!)
Whats the chamber size, is the Fast port matched, what size headers. In fact you might as well list the whole bloody thing, it'll keep Ringram happy too!!!
ETA: (Any measurements on the vacuum at idle?)
This is important to me as I have just had a cam spec'd based on not losing too much vacuum due to overlap, but we like the look of the new Comp LSr stroker cams.
Also what was the lift at .050 on the big cam?
BTW I like what I see, and its exactly what I'm looking for - 500RWHP with torque to match.
More questions (tell me to bugger off if you like!)
Whats the chamber size, is the Fast port matched, what size headers. In fact you might as well list the whole bloody thing, it'll keep Ringram happy too!!!
Edited by MyM8V8 on Sunday 30th August 16:00
MyM8V8 said:
Thanks for this great info Paul. It gives me a few pointers for my 418. Whats the score with low speed/ low rpm driving with that big cam and whats the idle like???
ETA: (Any measurements on the vacuum at idle?)
This is important to me as I have just had a cam spec'd based on not losing too much vacuum due to overlap, but we like the look of the new Comp LSr stroker cams.
Also what was the lift at .050 on the big cam?
BTW I like what I see, and its exactly what I'm looking for - 500RWHP with torque to match.
More questions (tell me to bugger off if you like!)
Whats the chamber size, is the Fast port matched, what size headers. In fact you might as well list the whole bloody thing, it'll keep Ringram happy too!!!
Cam was specced for me by Thunder Racing, more lift on the intake than exhaust, 244/256 .624/.596 on 114. LSK lobe (i think) on intake with an older lobe on the exhaust (cant remember which), might be an XE.ETA: (Any measurements on the vacuum at idle?)
This is important to me as I have just had a cam spec'd based on not losing too much vacuum due to overlap, but we like the look of the new Comp LSr stroker cams.
Also what was the lift at .050 on the big cam?
BTW I like what I see, and its exactly what I'm looking for - 500RWHP with torque to match.
More questions (tell me to bugger off if you like!)
Whats the chamber size, is the Fast port matched, what size headers. In fact you might as well list the whole bloody thing, it'll keep Ringram happy too!!!
Edited by MyM8V8 on Sunday 30th August 16:00
The intake was very close to matching my ports anyway, so i didnt bother as i wasnt stripping the motor, however if i were, i would.
Chamber size is 65cc, i took this out from the stock Dart 62cc, i unshrouded the valves while there too.
Low end shunting is not bad at all, as long as the tune is on the money.
Tick over quite civil.
Edited by Brummmie on Sunday 30th August 16:13
Brummmie said:
MyM8V8 said:
Thanks for this great info Paul. It gives me a few pointers for my 418. Whats the score with low speed/ low rpm driving with that big cam and whats the idle like???
ETA: (Any measurements on the vacuum at idle?)
This is important to me as I have just had a cam spec'd based on not losing too much vacuum due to overlap, but we like the look of the new Comp LSr stroker cams.
Also what was the lift at .050 on the big cam?
BTW I like what I see, and its exactly what I'm looking for - 500RWHP with torque to match.
More questions (tell me to bugger off if you like!)
Whats the chamber size, is the Fast port matched, what size headers. In fact you might as well list the whole bloody thing, it'll keep Ringram happy too!!!
Cam was specced for me by Thunder Racing, more lift on the intake than exhaust, 244/256 .624/.596 on 114. LSK lobe (i think) on intake with an older lobe on the exhaust (cant remember which), might be an XE.ETA: (Any measurements on the vacuum at idle?)
This is important to me as I have just had a cam spec'd based on not losing too much vacuum due to overlap, but we like the look of the new Comp LSr stroker cams.
Also what was the lift at .050 on the big cam?
BTW I like what I see, and its exactly what I'm looking for - 500RWHP with torque to match.
More questions (tell me to bugger off if you like!)
Whats the chamber size, is the Fast port matched, what size headers. In fact you might as well list the whole bloody thing, it'll keep Ringram happy too!!!
Edited by MyM8V8 on Sunday 30th August 16:00
The intake was very close to matching my ports anyway, so i didnt bother as i wasnt stripping the motor, however if i were, i would.
Chamber size is 65cc, i took this out from the stock Dart 62cc, i unshrouded the valves while there too.
Low end shunting is not bad at all, as long as the tune is on the money.
Tick over quite civil.
Edited by Brummmie on Sunday 30th August 16:13
Gassing Station | HSV & Monaro | Top of Page | What's New | My Stuff