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Not at all, I think you go and read some older posts on ls1.com.au you will find a few 216/220 - 220/220 cams with the lot making the 290-300 rwkw power back in the day
Yes there are a few but most are running bigger mid 220 plus cams unless they have head work to get 290 to 300 rwkw.
Your newest cam peaks at 6300.
Yes there are a few but most are running bigger mid 220 plus cams unless they have head work to get 290 to 300 rwkw.
Yep, I mentioned headwork as part of that figure above "However, 290-300 rwkw for 216/220 and 220/220 cams with heads and all the other mods was not that unusual back in the day," Its what I meant by "the lot" in my last response too, so the usual full mods. Very few big cams would be getting to 300 rwkw without headwork back then either, cant comment on the US cars.
I can only go off my own experiences but I personally wouldn't bother with an LS1 without proper headwork, I had really good results from it. On the workshops DynoLog, my original cam was 267 rwkw and then I added the Higgins heads and it went to 296 rwkw on that same dyno (the only other change was 100 cpi cats replacing the opened stockies). Even ignoring the final rwkw figure, that's a good improvement and surprised the workshop themselves.
Originally Posted by TimsLS1
Your newest cam peaks at 6300.
Yep, I mentioned in that post that I had missed that tiny dip but if you look at the graph you will see why that is not noticeable when driving it, the car pulls way past that when you're up it. Both those small cams I had, I would rev to around 6500-6800 to get the best out of it. As I complained about in my original thread, in comparison, the 218/226 felt like it as hitting a brick wall at 5500, so I was reving it out to about 5800. I cant find the dyno sheet for that one unfortunately, I want to look at it again to see if my feeling matches the sheet.
EDIT: Im going to go look for that sheet now.
Last edited by Pulse Red; Jan 7, 2021 at 04:27 PM.
Found this comparison sheet but still cant find the original 280 rwkw one from the shop that installed the 218/226 cam. This backs up what I felt despite not showing RPM.
I wish some others would comment, looks very odd to me, there should only be a couple of KW between them at peak power.
I really appreciate you posting your results !
Yes here is the graph overlaid with my previous cam in same car, when I say peak power I mean the point at which the most power is made. Definitely no point in me reving to 6800.
That's my cam dyno results Pulse Red has better heads and half a point more compression, that would explain the difference.
Cams around the same duration differ little even against the cheap $250 sloppy stage 2 Elgin cam as in dyno test below where he tests a heap of them. He did one on wide verses narrow LSA too. Thats one reason why I am surprised at Pulse Reds results.
Looks like He made same power as you Pulse Red if you subtract 15% for the dynojet to mainline dyno with his new guost cam and heads comes to 272 rwkw.
Thought I would mention that I had a chat with my tuner regarding upgrading to a FAST 92 or 102. Basically, on a cam as small as my 216/220 .600/.600 112, they didn't think it was at all worth the trouble. They said in their experience with the LS1 (these guys have been tuning them successfully since the LS1 was released in Australia), the FAST is only worth it on bigger cam/ high compression and stroked LS1s. They will fit one if I want but the wouldn't expect it to show any real improvement. Backs everything I have seen over my 20 odd years of owning these cars but others may disagree. So, I will skip the FAST upgrade. I still would have liked to try the TPis style LS6/LS2 90mm hybrid manifold but cant make it happen over here unfortunately.
Interestingly, they also mentioned that there is no point comparing the two Dyno sheets I posted in this thread. They said the first one (on their old Dyno) reads higher than the Dyno my new combo was run on. Basically, if the cams were run back to back on this current Dyno, they would be around the same.
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