Missing some boost and mph I think

RazorGTP

Oilsands Baby!
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Missing some boost and mph I think.

13 GT500
2.4” upper and 10%od
116
Scjmono tb
JLT 123
StainlessWorks headers, catless or/x
Omega Boostbox/Ngauge

Track DA usually around 4400’, street logs here 3300’ DA.

With the 10%od and 100 tune my 1/8 and 1/4 mile traps were 104 and 132mph with boost averaging 13psi. After adding the 2.4”, bps idler and 116 tune my boost did increase by 2psi from averaging 13 to 15. A buddy of mine here has the exact same setup as me and he’s averaging 19psi and traps 141mph. My logs don’t show belt slippage and just to make sure I just adjusted my bps idler to the tightest setting and logged, no change.

Anyone with the same setup in similar DAs? I’m at a loss. ‍♂️
 

biminiLX

never stock
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Toledo, OH
What do you shift at?
It’s a double edge sword situation, but the best track times/mph come from 7000rpm shifts.
But it’s hard to see the tach on these cars and there’s always shift rpm flair, so you risk over rev and parts breakage, likely oil pump gears with high rpm and lower balancers.
Your 132 trap at those DAs is pretty in line with my results when closer to stock.
15% lower only is just under 2.4/10% blower speed, and in better DA/elevation I was trapping 134-137mph.
How do you like the Boost box Omega? I’m thinking of doing it.
-J
 

REDSTALION

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Bahrain
Missing some boost and mph I think.

13 GT500
2.4” upper and 10%od
116
Scjmono tb
JLT 123
StainlessWorks headers, catless or/x
Omega Boostbox/Ngauge

Track DA usually around 4400’, street logs here 3300’ DA.

With the 10%od and 100 tune my 1/8 and 1/4 mile traps were 104 and 132mph with boost averaging 13psi. After adding the 2.4”, bps idler and 116 tune my boost did increase by 2psi from averaging 13 to 15. A buddy of mine here has the exact same setup as me and he’s averaging 19psi and traps 141mph. My logs don’t show belt slippage and just to make sure I just adjusted my bps idler to the tightest setting and logged, no change.

Anyone with the same setup in similar DAs? I’m at a loss. ‍♂️


I haven't tested my car for 1/8 or 1/4 mile traps, but i have the same pulleys setup/100 tune and the boost is averaging at 19-20psi at 3500'DA.
 

RazorGTP

Oilsands Baby!
Established Member
Joined
Mar 23, 2008
Messages
1,355
Location
Fort McMurray, Alberta
F403152F-9DC6-4BF6-A7EF-2F281BA34107.jpeg
What do you shift at?
It’s a double edge sword situation, but the best track times/mph come from 7000rpm shifts.
But it’s hard to see the tach on these cars and there’s always shift rpm flair, so you risk over rev and parts breakage, likely oil pump gears with high rpm and lower balancers.
Your 132 trap at those DAs is pretty in line with my results when closer to stock.
15% lower only is just under 2.4/10% blower speed, and in better DA/elevation I was trapping 134-137mph.
How do you like the Boost box Omega? I’m thinking of doing it.
-J

I’m shifting between 6300-6500, no different then with before the addition of the 2.4 and 116 tune and there is absolutely no difference. Check the pic. I should definitely be seeing 135-137mph according to everything thing I’ve read and testimonials from others with the same/similar setups. If you already use the Ngauge then the boost box is a must if you want to monitor and datalog boost!

I haven't tested my car for 1/8 or 1/4 mile traps, but i have the same pulleys setup/100 tune and the boost is averaging at 19-20psi at 3500'DA.

Hmm Really huh... how are you monitoring your boost? Using an Aftermarket gauge?

Do you have headers?
 

REDSTALION

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Bahrain
View attachment 1591195

I’m shifting between 6300-6500, no different then with before the addition of the 2.4 and 116 tune and there is absolutely no difference. Check the pic. I should definitely be seeing 135-137mph according to everything thing I’ve read and testimonials from others with the same/similar setups. If you already use the Ngauge then the boost box is a must if you want to monitor and datalog boost!



Hmm Really huh... how are you monitoring your boost? Using an Aftermarket gauge?

Do you have headers?

Still using the OE gauge in the center console, and yes I have ARH LT with O/R Xpipe.
 

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