Atlanta s550s Intake Manifold Shootout

[Todd15Fastback]

If they need help I've got a good set of OP VCT angles for shorter runner intakes. Also they should be able to add a few more degrees of spark throughout the band even down low and midrange to help the torque losses.

oh nice! I just sent Injected an email with all the info from the dyno day and am awaiting their reply. I need to tag their front-end manager here so he can see this.

@Zemedici Hey buddy. Tagged you here for this offer by Terminator2. See what Curt says. I emailed Aric, too.

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[Zemedici]

oh nice! I just sent Injected an email with all the info from the dyno day and am awaiting their reply. I need to tag their front-end manager here so he can see this.

@Zemedici Hey buddy. Tagged you here for this offer by Terminator2. See what Curt says. I emailed Aric, too.

Shit, I need to get back on this board.

Thank you [MENTION=23439]Terminator2[/MENTION], I will pass the info to my tuner.

 

[Terminator2]

I'm Blake on the first post with the GT350 manifold.

Green is BEFORE the GT350 manifold (same mods otherwise)
Red is AFTER the GT350 manifold (today).

Both Lund tunes. Both on the same dyno, same car. Weird.

Click here for a log of this tune. This is a 3rd gear pull from a few days ago.

First thing that strikes me is Your throttle body isn't open 90* like it should be it's 85* until 4700 then 82* there after!

 

[dubster99]

First thing that strikes me is Your throttle body isn't open 90* like it should be it's 85* until 4700 then 82* there after!

85* is WOT on these cars. I've never seen one at 90.

I'm surprised to see the sniper drop after 7000.

 

[markmurfie]

Negative knock is actually adding timing and if you look at the VCT events it looks like the dip you see is from transitioning to the WOT VCT/Timing tables which should have a lower base timing at that load and RPM. Lund has much more experience than I do but that timing down low seems really aggressive and may be past MBT. Without working on this platform I'll have to trust them though.

True but -4 to -2 is accomplished by a positive number.

 

[Grimace427]

First thing that strikes me is Your throttle body isn't open 90* like it should be it's 85* until 4700 then 82* there after!

85* is WOT on these cars. I've never seen one at 90.

I'm surprised to see the sniper drop after 7000.

I've only read a few S550 datalogs but none of them showed 90* throttle angle, all were in the 8x* range. Same with the S197 logs I've seen including my own car which was tuned by several different tuners.

 

[DarkestHour]

True but -4 to -2 is accomplished by a positive number.

Good point :lol:

 

[DarkestHour]

I've only read a few S550 datalogs but none of them showed 90* throttle angle, all were in the 8x* range. Same with the S197 logs I've seen including my own car which was tuned by several different tuners.

Same with Focus ST. I believe the value is based off the voltage and not a physical angle.

 

[wildcatgoal]

So basically I should just get a single turbo? Well... okay... if I must.

No seriously, nice numbers guys! I wish it were possible to get to 490-500 WHP without "supercharger money" worth of modifications to get there. I swear, if someone came out with something that did that for like $2,500 total -- they'd make a killing.

It was fun helping install yellowstang's Holley a while back. It looks so good when it's installed. It looked like a really nice piece of kit before we installed it, too. I'm a GT350 manifold guy, though, if I were to get one... I just like the stockish look. But I still want one of those damn Edelbrock ones... maybe they'll come down in price.

 

[higdominator]

85* is WOT on these cars. I've never seen one at 90.

I'm surprised to see the sniper drop after 7000.

Me too, it doesn't appear it was ran to 8K like the others either?


I'm doing a true back to back on the 11th of March to show what a Sniper adds to an E85 car with 1 3/4" headers.

I had solid gains with one before but I wanted to pull it off to get a baseline and some good data on headers.


Also would add that the drop off on the Sniper is very odd. My car made peak @ 7300 with the sniper and it slowly tapered down from there.

 

[Terminator2]

I've only read a few S550 datalogs but none of them showed 90* throttle angle, all were in the 8x* range. Same with the S197 logs I've seen including my own car which was tuned by several different tuners.

You have to tune it to open past 85*. Mines at 90* and logs show it making more torque vs at 85*.

 

[Gunbearer]

The numbers produced are wheel horsepower correct?

 

[BluByeU]

Wealth of knowledge & experience chiming in - great thread. [MENTION=7398]Todd15Fastback[/MENTION] did you consider the matching throttle body for the Snyper, I see on Summit it's a 90 too, as opposed to the 90 BBK throttle body?

 

[Terminator2]

85* is WOT on these cars. I've never seen one at 90.

I'm surprised to see the sniper drop after 7000.

Mines at 90*

 

[Terminator2]

Wealth of knowledge & experience chiming in - great thread. [MENTION=7398]Todd15Fastback[/MENTION] did you consider the matching throttle body for the Snyper, I see on Summit it's a 90 too, as opposed to the 90 BBK throttle body?

Both his sniper and throttle body are 90mm. They should match but it's worth checking.

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