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LT4 HPFP added to LT1 w SC for ~40 hp gain :)
https://cimg5.ibsrv.net/gimg/www.cor...321439a41b.jpg
Self installed an LT4 HPFP. Got it for $615 on rockauto.com. I had Cordes Performance Racing update my tune and got an additional 38 rwhp and 39 ft-lb of wheel torque. Totally happy with that! Thanks CPR and thanks Nick! 2016 Z51 A&A V3 Si with 3.8 inch pulley Alky Meth injection single nozzle Flex Fuel tuned at E64 (that's all there was) LT4 HPFP This is one fun car! |
Nice upgrade! Unfortunately the LT1 HPFP runs out of steam *very* quickly on a boosted motor, and even more so on E85. |
I wonder how much more power if you do the LT4 high flow injectors as well 🤔 |
No other mods, just the hpfp and tune added 40whp?
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Originally Posted by BlueDevilZ51
(Post 1598444817)
No other mods, just the hpfp and tune added 40whp?
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Okay, that makes sense. I've always heard the LT1 is limited to around 630whp by its stock fuel system.
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Originally Posted by ricmalaz
(Post 1598444853)
Yes, BUT, my setup was fuel limited by the LT1 HPFP. So adding the LT4 HPFP just allowed me to get more fuel to get more power out of my setup.
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Originally Posted by BrunoTheMellow
(Post 1598445519)
No injectors ?
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Originally Posted by ricmalaz
(Post 1598185313)
https://cimg5.ibsrv.net/gimg/www.cor...321439a41b.jpg
Self installed an LT4 HPFP. How difficult was the install, and what all was involved in putting it in? . |
Why not spray more meth ? |
Originally Posted by 123sugey
(Post 1598447385)
Why not spray more meth ? |
ttt
Originally Posted by 123sugey
(Post 1598447385)
Why not spray more meth ? |
Originally Posted by ricmalaz
(Post 1598185313)
https://cimg5.ibsrv.net/gimg/www.cor...321439a41b.jpg
Self installed an LT4 HPFP. Got it for $615 on rockauto.com. I had Cordes Performance Racing update my tune and got an additional 38 rwhp and 39 ft-lb of wheel torque. Totally happy with that! Thanks CPR and thanks Nick! 2016 Z51 A&A V3 Si with 3.8 inch pulley Alky Meth injection single nozzle Flex Fuel tuned at E64 (that's all there was) LT4 HPFP This is one fun car! Nice results! However, I would think that if the gains were fuel related then they would only have shown up on the higher rpm and horsepower end of the graph where the stock pump was running out of fuel. The stock fuel pump should have been sufficient at the lower rpm/hp levels. The gap does increase linear but almost all stock vs tuned dyno results do this too. I assume due to percentage increases. Maybe it was just a superior tune? Either way that is good power. :cheers: |
Originally Posted by HotRodWebb
(Post 1598447776)
Nice results! However, I would think that if the gains were fuel related then they would only have shown up on the higher rpm and horsepower end of the graph where the stock pump was running out of fuel. The stock fuel pump should have been sufficient at the lower rpm/hp levels. The gap does increase linear but almost all stock vs tuned dyno results do this too. I assume due to percentage increases. Maybe it was just a superior tune? Either way that is good power. :cheers:
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Originally Posted by HotRodWebb
(Post 1598447776)
Nice results! However, I would think that if the gains were fuel related then they would only have shown up on the higher rpm and horsepower end of the graph where the stock pump was running out of fuel. The stock fuel pump should have been sufficient at the lower rpm/hp levels. The gap does increase linear but almost all stock vs tuned dyno results do this too. I assume due to percentage increases. Maybe it was just a superior tune? Either way that is good power. :cheers:
correct he has a higher ethanol % |
Tuner was probably just running it real safe across the board knowing it would starve up top so that the car didn't fall flat on it's face up top and lean out.
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Joe Cordes is top notch |
Originally Posted by Fast6.3
(Post 1598451676)
Joe Cordes is top notch |
Originally Posted by Fast6.3
(Post 1598451676)
Joe Cordes is top notch Hey Joe - can you address 123sugey's question earlier in this thread asking why not more meth? |
Originally Posted by ricmalaz
(Post 1598456459)
Definitely!
Hey Joe - can you address 123sugey's question earlier in this thread asking why not more meth? Im not a fan of fully relying on meth for big power. If you run out or your meth system malfunctions, kiss your engine goodbye in that scenario. An OEM-style HPFP will be way more reliable than a meth pump every single time. In my experience, replacing a meth pump every year or two is not uncommon. I don’t mind meth for some extra cooling and a little extra fuel, but fully relying on it every time you boost is not a great idea in my humble opinion. |
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