Injector sizing... help wanted
Thread Starter
Melting Slicks
Joined: May 2003
Posts: 2,387
Likes: 2
From: Meriden CT
Injector sizing... help wanted
So, I'm planning a megasquirt system for the winter project, and starting to gather components for the 383.
For injectors, I will be running 4, and using the megasquirt page for reference, it looks like I need (4) 66# (693cc) injectors to support about 450 hp.
Now, down the road I'm thinking forced induction which would require more fuel... so would it be wasteful to buy larger injectors now and run them for a year at lower power levels? Or should I not mess around and buy new ones down the road?
Any advice from the guru's?
For throttle body I'm planning something like this BBK.. althou I would like integral TPS and IAC (I need fast idle solenoid w/ MS so stepper motor will not work)
http://store.summitracing.com/partde...5&autoview=sku
Its a dual 52mm. Is this a decent TB for my application and future boost plans?
Thanks
For injectors, I will be running 4, and using the megasquirt page for reference, it looks like I need (4) 66# (693cc) injectors to support about 450 hp.
Now, down the road I'm thinking forced induction which would require more fuel... so would it be wasteful to buy larger injectors now and run them for a year at lower power levels? Or should I not mess around and buy new ones down the road?
Any advice from the guru's?
For throttle body I'm planning something like this BBK.. althou I would like integral TPS and IAC (I need fast idle solenoid w/ MS so stepper motor will not work)
http://store.summitracing.com/partde...5&autoview=sku
Its a dual 52mm. Is this a decent TB for my application and future boost plans?
Thanks
Last edited by JoeRags; Sep 22, 2006 at 12:27 AM.
Race Director
Joined: Nov 1999
Posts: 10,643
Likes: 8
From: Foxfield CO 1970 Convertible
Your calcs are right on for a normally aspirated engine.
What's your induction setup? Why do you only need 4 injectors?
It wouldn't be wasteful to buy big ones and run them at low power levels. However, you may or may not have idle problems. Big injectors can't perform as smoothly or accurately at real low levels, so that's the trade off.
What's your induction setup? Why do you only need 4 injectors?
It wouldn't be wasteful to buy big ones and run them at low power levels. However, you may or may not have idle problems. Big injectors can't perform as smoothly or accurately at real low levels, so that's the trade off.
Thread Starter
Melting Slicks
Joined: May 2003
Posts: 2,387
Likes: 2
From: Meriden CT
Originally Posted by Z-man
Your calcs are right on for a normally aspirated engine.
What's your induction setup? Why do you only need 4 injectors?
It wouldn't be wasteful to buy big ones and run them at low power levels. However, you may or may not have idle problems. Big injectors can't perform as smoothly or accurately at real low levels, so that's the trade off.
What's your induction setup? Why do you only need 4 injectors?
It wouldn't be wasteful to buy big ones and run them at low power levels. However, you may or may not have idle problems. Big injectors can't perform as smoothly or accurately at real low levels, so that's the trade off.
thanks
