A few questions re the Atomic MSD intake
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I couldn't find a Nick Williams TB locally but there's one on eBay from a US supplier, Hawks Motorsports. Not bad pricing. I don't know if you need other parts to fit this to a 5.7.
92mm @ $603.15 AUD delivered.
https://www.ebay.com.au/itm/Nick-Wil....m46890.l49292
102mm @ $611.64 AUD delivered
https://www.ebay.com.au/itm/Nick-Wil....m46890.l49292
92mm @ $603.15 AUD delivered.
https://www.ebay.com.au/itm/Nick-Wil....m46890.l49292
102mm @ $611.64 AUD delivered
https://www.ebay.com.au/itm/Nick-Wil....m46890.l49292
Last edited by Pulse Red; Dec 22, 2020 at 08:58 PM.
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Yes that sounds correct. Pulse Red has good flowing heads which can raise peak considerably possibly around 6300 or just under but I've never seen a sub 220 duration peak at 6700 6800 in an LS1 with an LS6 intake manifold.
Dont know anyone who has.
Dont know anyone who has.
Last edited by TimsLS1; Dec 23, 2020 at 09:03 PM.
I couldn't find a Nick Williams TB locally but there's one on eBay from a US supplier, Hawks Motorsports. Not bad pricing. I don't know if you need other parts to fit this to a 5.7.
92mm @ $603.15 AUD delivered.
https://www.ebay.com.au/itm/Nick-Wil....m46890.l49292
102mm @ $611.64 AUD delivered
https://www.ebay.com.au/itm/Nick-Wil....m46890.l49292
92mm @ $603.15 AUD delivered.
https://www.ebay.com.au/itm/Nick-Wil....m46890.l49292
102mm @ $611.64 AUD delivered
https://www.ebay.com.au/itm/Nick-Wil....m46890.l49292
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I will say that the shop that tuned my combo (I just gave them the TSP 216/220 cam to swap for my 218/226 and they fitted new springs too), they made special mention of how long this cam held on up top but having had similar with my original 214/217, I didn't think much of it. I just knew that the 218/226 was dying at like 5700 rpm and I hated that. This cam smashes past that rpm, no dip at all, I love how it revs up top. I was blaming the 218/226 but it looks like that is not uncommon.
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Thats cheap. Try this from our normal parts suppliers, Holley Sniper @ $1,905.00 AUD
https://www.supercheapauto.com.au/p/...PO3826931.html
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Surprising!! Wish you could post a photo of the dyno result?
I decided against a fast manifold as I did a bit research and it seems it can create more low rpm driveability issues than putting in a big cam. I am already right on the edge of acceptable driveability even after lots of tuning so I won't risk it.
I decided against a fast manifold as I did a bit research and it seems it can create more low rpm driveability issues than putting in a big cam. I am already right on the edge of acceptable driveability even after lots of tuning so I won't risk it.
Last edited by TimsLS1; Dec 24, 2020 at 02:42 AM.
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Surprising!! Wish you could post a photo of the dyno result?
I decided against a fast manifold as I did a bit research and it seems it can create more low rpm driveability issues than putting in a big cam. I am already right on the edge of acceptable driveability even after lots of tuning so I won't risk it.
I decided against a fast manifold as I did a bit research and it seems it can create more low rpm driveability issues than putting in a big cam. I am already right on the edge of acceptable driveability even after lots of tuning so I won't risk it.
102 has the tunability issues I thought? 92 is fine and no fitment issues. Plus you keep your rails and water pump intact. Add that cheap NW TB.
This not an option? It should be good over an LS1 manifold. I have had tuning issues previously but man, the current shop did a brilliant job!
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I replaced my LS1 manifold with an LS6 manifold years ago.
Seems to me you have the most to gain from a fast manifold due to your better heads. The TSP cam you have appears to be a good one too.
Seems to me you have the most to gain from a fast manifold due to your better heads. The TSP cam you have appears to be a good one too.
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Ah, ok. I would have thought that you would still get more from your bigger cam with a new manifold. I had wondered if there is actually any more to be had from my combo. With this TSP cam and the original custom, I'm always being told that it shouldn't do what it does, so maybe there's no more to be had. Even though I'm running short headers still too. Don't know.
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My cam still bucks when cruise control is on in 5th gear despite having it dyno tuned and road tuned 3 times so Id best not put a Fast manifold on if it risks upsetting it more.
I have some results here in front of me where 20 headers were dynoed on a LS1 and after tuning the HSV headers only made 1 HP more than the stock cast iron manifold. Not sure what shorties would do, I presume you must have a good set to get the results you have.
I have some results here in front of me where 20 headers were dynoed on a LS1 and after tuning the HSV headers only made 1 HP more than the stock cast iron manifold. Not sure what shorties would do, I presume you must have a good set to get the results you have.
Last edited by TimsLS1; Dec 24, 2020 at 05:42 AM.
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My cam still bucks when cruise control is on in 5th gear despite having it dyno tuned and road tuned 3 times so Id best not put a Fast manifold on if it risks upsetting it more.
I have some results here in front of me where 20 headers were dynoed on a LS1 and after tuning the HSV headers only made 1 HP more than the stock cast iron manifold. Not sure what shorties would do, I presume you must have a good set to get the results you have.
I have some results here in front of me where 20 headers were dynoed on a LS1 and after tuning the HSV headers only made 1 HP more than the stock cast iron manifold. Not sure what shorties would do, I presume you must have a good set to get the results you have.
Is that header test the one from Street Machine at Sam's Performance? I have that one but it's very old now. The 1 5/8 DPE (sold by CSV) shorties were made later than this test (but still a long time ago) and way better than the other common shorty headers. It was actually a patented design I think. Worse than long tubes? Internet says all LT are better than shorties but I'll be asking CHE in Sydney their thoughts on changing them for LT next year.
Other than the possibility of getting a Fast 92 manifold and NW 92mm TB, that's the only changes I'm looking at. I like how the car runs on the street now.
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Yes that's right Sams performance, I have the magazine and also a printed version of the test from online, the stock cast manfold was really close to many of the headers in the test within a few HP of some of them. The HSV headers actually had less torque than the cast manifold.
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Yes that's right Sams performance, I have the magazine and also a printed version of the test from online, the stock cast manfold was really close to many of the headers in the test within a few HP of some of them. The HSV headers actually had less torque than the cast manifold.
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Yes I think it was stock cam,
Agreed that makes sense.
The same seems to be true in reverse.
After seeing the test I tried to use a new cam with just the cast headers and a very basic tune, the cam didn't make extra power over stock until I put headers on it and had it tuned properly.
Agreed that makes sense.
The same seems to be true in reverse.
After seeing the test I tried to use a new cam with just the cast headers and a very basic tune, the cam didn't make extra power over stock until I put headers on it and had it tuned properly.
Last edited by TimsLS1; Dec 24, 2020 at 11:45 PM.
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I too was of the understanding that it's actually the 102mm TB that causes tuning difficulty. The 92mm TB is fine though. However, the Fast 102 has its own difficulties with fitment over the 92. It didn't seem worth the difficulty to me over choosing the 92 and you then can keep your rails and water pump intact. If you are going for the full send option though, you want the 102.
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VPW don't have the better LSXR I. Stock till mid Feb post date.
Apparently it does effect driveability, see link and post by Jake Fushion.
https://ls1tech.com/forums/generatio...stock-ls1.html
Apparently it does effect driveability, see link and post by Jake Fushion.
https://ls1tech.com/forums/generatio...stock-ls1.html