Max rpm built 5.3?
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Got it running again last night. Ran some logs on it and it’s way fat. I didn’t have any more time to dial it in yet, but I just raised the limiter to 7500. It actually was at 7300 and I’ve hit it a few times on the 1-2 shift pretty easily, when I have it turned up past 20psi it’ll blow through the limiter as soon as boost hits. I’ll post back later
I do everything myself. Tuning. Building. I’m probably not the best tuner but I can do good enough. I need to find my old thread to update it about check valves and fuel pumps. I had a aeromotive 340 and 325 originally and when I did return system it wasn’t holding pressure after killing the engine and after it sat for a bit, I had to get in the habit of turning the key, waiting a second or two and then turning the key to start, so it would prime the pump. Well I found out the 340 didn’t have a check valve. I made sure both my pumps have check valves now. Fires immediately without priming.
Cool. I have two pumps as well, the big 'un has a check valve and comes on with 5 lbs of boost.
When I overspun my car by accident, I did actually feel it nose over a little bit.
When I overspun my car by accident, I did actually feel it nose over a little bit.
not sure if I mentioned. The primary is a 255 Walbro and the secondary is a 525 walbro. Both with check valves. I have a Hobbs switch set for around 5psi as a redundant backup and my boost controller is set to 1 or 2psi with certain parameters (rpm, speed, throttle percentage). The Hobbs is just in case the controller fails to activate and I have a led light that comes on below my radio when the pump is sent 12v. It’s not hooked up to the signal for the relay (iirc I have two relays , redundant) it’s tied into the power sent to the pump.
I read your engine build.... stock ported oil pump!?!?! why on earth do you think it would be wise to increase RPMs when what you have put together for an engine isn't really setup for much more anyway? I would be worried about oil pressure (have you logged it) and then that turbo is tiny and simply out of airflow. You have ported 243's.... time to ditch that turbo, go bigger and run (2) 525's on E85 and see what that combo can do keeping it at 7000rpm. I wouldn't even change the cam... just bigger turbo.
What intake manifold are you running?
What intake manifold are you running?
I read your engine build.... stock ported oil pump!?!?! why on earth do you think it would be wise to increase RPMs when what you have put together for an engine isn't really setup for much more anyway? I would be worried about oil pressure (have you logged it) and then that turbo is tiny and simply out of airflow. You have ported 243's.... time to ditch that turbo, go bigger and run (2) 525's on E85 and see what that combo can do keeping it at 7000rpm. I wouldn't even change the cam... just bigger turbo.
What intake manifold are you running?
What intake manifold are you running?
you might not have read the whole build. I ditched the stock pump and put a hv/hp melting pump in it. Main studs. H beam rods. Bigger ferrea valves. I have a hybrid turbo with a 1.25 exhaust housing and 4” outlet. I don’t need/want a bigger turbo. This isn’t a drag car and I like the response it has now. I don’t want a 525 as the primary, that’s too much flow, heat, amperage draw for doing what I do with the car mainly…,drive it and get caught in bumper to bumper traffic (like I’m in right now, in the car).
Well I’m a dummy. I’ll get to that in a minute. But first, I haven’t had a bunch of free time to make a bunch of hits and get it tuned. Good news is the fuel pumps definitely fixed my leaning out problem, and like I mentioned earlier, my delayed starting.
It was a beautiful day to day so I went ran some errands And rode around for a little while. Also just realized that it didn’t lean out after driving and being in traffic. My guess is the fuel was getting over heated from larger 340 pump over pumping at idle and cruise. Just my guess.
so I made some hits while out and about and it was rich so I flashed it a couple times and leaned it out little by little. Still running in the mid to high 10’s but better than low 10’s high 9’s. Seems to be picking up power as I lean it out. On the way home I made a couple first gear to second gear hits and tried to pull it higher. It nosed over before the 7500 limiter. I noticed I was only getting 12psi vs the normal 14 so I turned it up two levels. Boosted still down. I thought to myself, why would I be losing boost as I go leaner? Then I was thinking the duty cycle option on my boost controller might be the culprit. Then I realized when I got home, I had closed the exhaust when I went through the Zaxby’s drive through and never opened it back up. Doh. It seems to choke it and lower the boost a couple to a few psi depending on how high I have it turned up. O well. I’ll make some more hits with it open and post back.
It was a beautiful day to day so I went ran some errands And rode around for a little while. Also just realized that it didn’t lean out after driving and being in traffic. My guess is the fuel was getting over heated from larger 340 pump over pumping at idle and cruise. Just my guess.
so I made some hits while out and about and it was rich so I flashed it a couple times and leaned it out little by little. Still running in the mid to high 10’s but better than low 10’s high 9’s. Seems to be picking up power as I lean it out. On the way home I made a couple first gear to second gear hits and tried to pull it higher. It nosed over before the 7500 limiter. I noticed I was only getting 12psi vs the normal 14 so I turned it up two levels. Boosted still down. I thought to myself, why would I be losing boost as I go leaner? Then I was thinking the duty cycle option on my boost controller might be the culprit. Then I realized when I got home, I had closed the exhaust when I went through the Zaxby’s drive through and never opened it back up. Doh. It seems to choke it and lower the boost a couple to a few psi depending on how high I have it turned up. O well. I’ll make some more hits with it open and post back.
