Injector size question
05-31-2005, 03:18 PM
#1
Supreme Member
Thread Starter
Join Date: Aug 2001
Location: Uppsala Sweden
Posts: 1,017
Likes: 0
Received 1 Like
on
1 Post
Car: 1989 Corvette
Engine: 350 Tpi
Transmission: ZF 6 speed
Axle/Gears: Dana 44 3,33
Injector size question
Im bulding an engine and i started with a 1986 305 tpi and i have hedders , kn filters , 3.5 inch exhaust no cat, bbk afp reg, airfoil, ported plenum and im going to port the heads and im waiting for a cam kit from summit http://store.summitracing.com/partde...=KeywordSearch
So now to the question are the 19lbs injectors to small ive also got injectors from a 350 engine , should i use them instead or will they just flood my engine with fuel ?
Is a 52mm throttlebody overkill ? or will i gain anything from it ?
So now to the question are the 19lbs injectors to small ive also got injectors from a 350 engine , should i use them instead or will they just flood my engine with fuel ?
Is a 52mm throttlebody overkill ? or will i gain anything from it ?
05-31-2005, 03:36 PM
#2
Senior Member
Join Date: May 2002
Location: Northern California, Redding
Posts: 845
Likes: 0
Received 0 Likes
on
0 Posts
Car: Red 1987 IROC Convertible
Engine: 305 LB9 TPI
Transmission: T5 5-Speed
Axle/Gears: 9-Bolt 3.45
That's a pretty mild cam. If your'e just porting the stock heads you won't gain any power by using bigger injectors. You MAY however get some gain by installing an AFPR and going up to ~46 psi fuel. Don't get a bigger throttle body, that would be a mistake.
05-31-2005, 03:47 PM
#3
Senior Member
Join Date: May 2002
Location: Northern California, Redding
Posts: 845
Likes: 0
Received 0 Likes
on
0 Posts
Car: Red 1987 IROC Convertible
Engine: 305 LB9 TPI
Transmission: T5 5-Speed
Axle/Gears: 9-Bolt 3.45
Oh, I see that you already have an AFPR.... But 50 psi should be to much pressure for what you're running.
Also, an 86 engine did not come with a roller cam, so you probably need to buy some self-aligning rockers for those type lifters.
Also, an 86 engine did not come with a roller cam, so you probably need to buy some self-aligning rockers for those type lifters.
06-02-2005, 04:42 PM
#5
Supreme Member
Thread Starter
Join Date: Aug 2001
Location: Uppsala Sweden
Posts: 1,017
Likes: 0
Received 1 Like
on
1 Post
Car: 1989 Corvette
Engine: 350 Tpi
Transmission: ZF 6 speed
Axle/Gears: Dana 44 3,33
Originally posted by mnorton
Oh, I see that you already have an AFPR.... But 50 psi should be to much pressure for what you're running.
Also, an 86 engine did not come with a roller cam, so you probably need to buy some self-aligning rockers for those type lifters.
Oh, I see that you already have an AFPR.... But 50 psi should be to much pressure for what you're running.
Also, an 86 engine did not come with a roller cam, so you probably need to buy some self-aligning rockers for those type lifters.
06-03-2005, 12:36 PM
#7
Senior Member
Join Date: May 2002
Location: Northern California, Redding
Posts: 845
Likes: 0
Received 0 Likes
on
0 Posts
Car: Red 1987 IROC Convertible
Engine: 305 LB9 TPI
Transmission: T5 5-Speed
Axle/Gears: 9-Bolt 3.45
I'm a bonehead sometimes... I see now that you are going to use flat tappet lifters/cam so you won't need self-aligning rockers. Those are only needed on a roller cam/lifters combo. As for your question: 1988 rockers on a flat tappet cam/lifters... I believe that you should be fine using that combo.
Trending Topics
06-04-2005, 01:59 PM
#8
Supreme Member
Thread Starter
Join Date: Aug 2001
Location: Uppsala Sweden
Posts: 1,017
Likes: 0
Received 1 Like
on
1 Post
Car: 1989 Corvette
Engine: 350 Tpi
Transmission: ZF 6 speed
Axle/Gears: Dana 44 3,33
Ok thanks guys , this is the first time im rebiulding an engine.
Yes maybe the cam is mild but still i guess its better than the stock one , right?
Im looking to build a reliable engine and maybe next year either turbo or supercharge it.
They claim that using this cam on a 1986 305 tpi will give you 40 hp extra on a stock engine.
Yes maybe the cam is mild but still i guess its better than the stock one , right?
Im looking to build a reliable engine and maybe next year either turbo or supercharge it.
They claim that using this cam on a 1986 305 tpi will give you 40 hp extra on a stock engine.
Last edited by Scania; 06-05-2005 at 03:26 PM.
06-08-2005, 04:12 PM
#9
Junior Member
Join Date: Jun 2005
Location: Charlotte,NC
Posts: 19
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Trans Am Gta
Engine: 305 now, Just bought my 355 today, ready to install~~~
Transmission: 5 speed
Injector.......
Do u wanna sell the 22# 04 24 lb injectors ???? Peace
06-11-2005, 12:10 AM
#10
Member
Join Date: Aug 2004
Posts: 239
Likes: 0
Received 0 Likes
on
0 Posts
Car: 88 GTA
Engine: 305
Transmission: Manual
Get a good AFPR like the Holley one or something like that. If you raise the pressure abit, your stock injectors should be good up to about 300hp or so I believe.
06-11-2005, 03:55 PM
#11
Supreme Member
Thread Starter
Join Date: Aug 2001
Location: Uppsala Sweden
Posts: 1,017
Likes: 0
Received 1 Like
on
1 Post
Car: 1989 Corvette
Engine: 350 Tpi
Transmission: ZF 6 speed
Axle/Gears: Dana 44 3,33
Ok , i hope my BBK AFPR is good enough.
So unless i pull more then 300 hp i dont have to change them, then i will wait untill i turbo or supercharge the engine.
Thanks alot for all the answers.
So unless i pull more then 300 hp i dont have to change them, then i will wait untill i turbo or supercharge the engine.
Thanks alot for all the answers.
Thread
Thread Starter
Forum
Replies
Last Post
toronto formula
Engine/Drivetrain/Suspension Parts for Sale
15
11-10-2015 06:17 AM
knight72
Engine/Drivetrain/Suspension Wanted
0
08-10-2015 09:32 PM
