|
427 build complete - 500/520 Hello, I don't like the experience I had with the dyno shop I chose. I feel like there is more horse power to be found with the current setup. It put down 498whp 518wtq @ 12.9 AFR. There are parts of this build that I am changing in the some-what near future, as well as going with a different dyno tuner. This build is meant for Forced Induction (9.8:1 CR ) - however I am compelled to maximize its' current N/A state. Internal: 427 TSP Shortblock PRC 247cc 68cc chamber heads (Yes, CATHEDRAL, bring on the hate, that's ok :-)) 235/244 .629/.615 112+4 -20cc Wiseco Pistons .040 Cometic Head Gaskets Trunion upgraded rockers External: Intake manifold: 102 FTP lid --> 100mm MAF --> 102mm Fabricated Aluminum 5.75" runner length Headers: 1 3/4 Primaries to 3" Collectors 36lb injectors that are riding on their limits Near future changes for now: Ditching the Fab. Aluminum Intake - replacing with either: Fast 102 LSXR, or MSD 102mm Ditching stock coils, replacing with truck coils Switching to 1 7/8 headers still to 3" primaries 42lb injectors (or 60+lb injectors depending on how quickly I go forced induction) Forced induction: Eyeing an F1A for now. Thanks, Andy |
Can we see the dyno graph ? What RPM did hp peak at? Playing with one of those fuel Injectors calculators seems like eight 42# injectors at 58 psi fuel pressure at 80% duty cycle calculate to be good for about 535-540 whp NA. At 90% duty cycle they should do about 600 whp NA . That might be OK for now but probably too small for forced induction because the 42's at 58 psi with 90% duty cycle in a forced induction calculate to support ~ 500 whp. |
https://cimg5.ibsrv.net/gimg/ls1tech...dc59aa563e.jpg 416ci Same heads as you 12:1 Fast 102/102 17/8 Really hot humid texas day... Id say youre on par for a low comp boost motor with a small boost cam!!! |
Who specd your Cam at TSP? Lonnie? |
How are you peaking below 5252 rpm something is wrong |
Originally Posted by big hammer
(Post 19996031)
How are you peaking below 5252 rpm something is wrong |
Originally Posted by Mavn
(Post 19996084)
who??? oh pee |
Originally Posted by AndyTA
(Post 19995939)
Hello, I don't like the experience I had with the dyno shop I chose. I feel like there is more horse power to be found with the current setup. It put down 498whp 518wtq @ 12.9 AFR. There are parts of this build that I am changing in the some-what near future, as well as going with a different dyno tuner. This build is meant for Forced Induction (9.8:1 CR ) - however I am compelled to maximize its' current N/A state. Internal: 427 TSP Shortblock PRC 247cc 68cc chamber heads (Yes, CATHEDRAL, bring on the hate, that's ok :-)) 235/244 .629/.615 112+4 -20cc Wiseco Pistons .040 Cometic Head Gaskets Trunion upgraded rockers External: Intake manifold: 102 FTP lid --> 100mm MAF --> 102mm Fabricated Aluminum 5.75" runner length Headers: 1 3/4 Primaries to 3" Collectors 36lb injectors that are riding on their limits Near future changes for now: Ditching the Fab. Aluminum Intake - replacing with either: Fast 102 LSXR, or MSD 102mm Ditching stock coils, replacing with truck coils Switching to 1 7/8 headers still to 3" primaries 42lb injectors (or 60+lb injectors depending on how quickly I go forced induction) Forced induction: Eyeing an F1A for now. Thanks, Andy Add headers definitely. What fuel pump? use the 42lb inj also. youll need 72lb+ for that F1A. Leave the intake on it. Get a second set of heads and mill em down to bring cr up. Something with a 227-237 runner. Your cam is ok as long as you optimize the rest, itll be great for boost. Did you measure pushrods? What 427? Ls7 block or ls3 block? |
Do forced induction and let it ride. |
Seems right for the small headers and low compression. |
Originally Posted by ddnspider
(Post 20003582)
Seems right for the small headers and low compression. |
Where's the OP? |
Originally Posted by G Atsma
(Post 20003630)
Where's the OP? |
Originally Posted by big hammer
(Post 20003732)
You're OP. |
| All times are GMT -5. The time now is 05:40 PM. |
© 2024 MH Sub I, LLC dba Internet Brands