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Old 05-03-2021, 08:32 AM   #1
larry_g

 
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HP Guesses?

So a year ago last week, my car (mods in sig) put down 683whp and 554wtq on straight 93. I am scheduled to hit the same dyno again tomorrow with the following mods...

3" exhaust w/ x-pipe to NPP (in sig but done after last tune)
3.75" Pulley (down from 4.00", should be 2 more psi boost)
DSX triple fuel pumps w/ return
E85 Flex tune

Take a guess and I'll post results tomorrow.
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Old 05-03-2021, 08:48 AM   #2
Axe55
 
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I'm going to guess... 753.

Also, can you post up what your actual boost is from the dyno graph? I dropped to a 3.875" pulley on my Whipple last year when I did my headers, and I'm thinking about changing to a full 3" exhaust and dropping to the 3.75" pulley this year. Just want to see the actual boost is when you go to the 3.75" pulley. TIA.
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Old 05-03-2021, 09:01 AM   #3
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Quote:
Originally Posted by Axe55 View Post
I'm going to guess... 753.

Also, can you post up what your actual boost is from the dyno graph? I dropped to a 3.875" pulley on my Whipple last year when I did my headers, and I'm thinking about changing to a full 3" exhaust and dropping to the 3.75" pulley this year. Just want to see the actual boost is when you go to the 3.75" pulley. TIA.
I'll have to ask, I don't believe we plotted boost on the graph last year but it hangs right around 8 so I'm expecting it to be around 10.
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Old 05-03-2021, 09:10 AM   #4
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I'll guess 789WHP/649WTQ
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Old 05-03-2021, 09:58 AM   #5
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826hp/702tq if you can keep it fueled
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Old 05-03-2021, 10:44 AM   #6
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Quote:
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826hp/702tq if you can keep it fueled
I have way more than enough pump now, injectors would be the limiting factor at this point. I still have some room to dial up the fuel pressure another 10 psi if needed.
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Old 05-03-2021, 03:04 PM   #7
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732/590 WAG...
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Old 05-03-2021, 08:20 PM   #8
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760/625
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Old 05-04-2021, 09:14 AM   #9
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750/630 is my guess
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Old 05-04-2021, 10:17 AM   #10
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So what exhaust was on it when dyno'd last?
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Old 05-04-2021, 03:07 PM   #11
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Just got back home. We were fighting some issues with heat soak and the belt was slipping so it only put down 730/630.

However, looking at it versus one of last year's runs, it should be nudging 800 once I sort out a smaller belt.

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Old 05-04-2021, 03:08 PM   #12
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Quote:
Originally Posted by eLeSthree View Post
So what exhaust was on it when dyno'd last?
Headers, test pipes, and then stock.


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830 WHP 700 WTQ, Whipple 2.9 @ 13lbs Boost, Flex Fuel Tune by Blevins Tuning, LSA SBE, 3.5 GripTec, ATI LS3 Damper, AFR 260cc Mongoose, ARP Studs, Yella Terra Ultralites, Johnson 2110R, BTR PDS Stage 3, Melling 10355, Improved Racing Baffle, ID1050X, DSX Triple Fuel Pump, RotoFab CAI, NW 103mm TB, Stainless Works 1-7/8" LTH to 3" Speed Eng w/ X-pipe to NPP, Powermaster 9509 XS, Detroit Speed Motor Mounts, MGW, Monster LT1-S, ZL1 Calipers, DBA Rotors & Pads, Bilstein B6 Struts & Shocks, BMR 1.25" Drop Springs & Adj Rear Bar, Pegasus Solid Bushings, Z/28 Wheels, other misc parts.
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Old 05-04-2021, 03:10 PM   #13
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pulley down full exhaust and E85 on a LSA block, if i didnt crack 800 i'd be kinda disappointed lol
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Old 05-04-2021, 03:15 PM   #14
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Quote:
Originally Posted by bayarea408 View Post
pulley down full exhaust and E85 on a LSA block, if i didnt crack 800 i'd be kinda disappointed lol
I was, until we noticed the belt was melting. The next run we were able to see smoke coming off of it.


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