24's or 30's

C

cjnecessary

Member

Mar 13, 2006

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richmond,in

Apr 10, 2007

#1

• Apr 10, 2007

• #1

well I'm kinda lost I just did a topend kit w/ a tfs stage 2 stage 3 port and polish 351 w heads w/ all tfs goodies and a typhon intake and 70mm p.p. t.b. now my question is do I need 24 or 30 lb injectors I will also be using a 150 dry shot. Any help would be great. Need to know in a hurry the summit truck should be here any day to drop off the jets for the 150 shot. thanks in advance.

 

C

cjnecessary

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Mar 13, 2006

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richmond,in

Apr 10, 2007

#2

• Apr 10, 2007

• #2

anyone?

 

T

trueblue01

Founding Member

Mar 10, 2001

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West Palm Beach, Florida

Apr 11, 2007

#3

• Apr 11, 2007

• #3

With a dry shot i would go 30's with that combo.

 

Grn92LX

Fidanza Man!

Founding Member

Jan 14, 2001

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New York

Apr 11, 2007

#4

• Apr 11, 2007

• #4

30's unless youre going to spray it a lot, then 42's. 255 high pressure pump.

 

N8Miller

I need NOS....make it 2 of the big ones

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Kingston, PA, USA

Apr 11, 2007

#5

• Apr 11, 2007

• #5

im with mike.....

 

jrichker

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Dublin GA

Apr 11, 2007

#6

• Apr 11, 2007

• #6

Injector HP ratings: divide flow rating by.5 and multiply the result by the number of injectors. This uses a 100% duty cycle. These ratings are for naturally aspirated engines.

Example:
19/.5 = 38, 38 x 8 = 304 HP
24/.5 = 48, 48 x 8 = 384 HP
30/.5 = 60, 60 x 8 = 480 HP

The preferred duty cycle is about 85% maximum, so for a safety factor multiply the final figure times .85.

304 HP x .85 = 258 HP
385 HP x .85 = 326 HP
480 HP x .85 = 408 HP

Remember that the above ratings are at 39 PSI. Increasing the pressure will effectively increase the flow rating. Example: a 19 lb injector will flow 24 lbs at 63 PSI, and a 24 lb injector will flow 30 lbs at 63 PSI.

See http://users.erols.com/srweiss/ to get the calculators used in these examples.

 

5spd GT

"the 5.0 owns all"

Founding Member

Aug 7, 2002

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Arkansas

Apr 11, 2007

#7

• Apr 11, 2007

• #7

30's with the dry shot...and tune.

 

Grn92LX

Fidanza Man!

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Jan 14, 2001

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Apr 11, 2007

#8

• Apr 11, 2007

• #8

cjnecessary said:

Need to know in a hurry the summit truck should be here any day to drop off the jets for the 150 shot. thanks in advance.

Click to expand...

You do know that with dry kits the jetting changes with different injectors, right?

 

C

cjnecessary

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Mar 13, 2006

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richmond,in

Apr 11, 2007

#9

• Apr 11, 2007

• #9

no i did'nt know that? so what size jet do i need now?

 

C

cjnecessary

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Mar 13, 2006

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richmond,in

Apr 11, 2007

#10

• Apr 11, 2007

• #10

thanks for all the reply's!

 

Grn92LX

Fidanza Man!

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#11

• Apr 11, 2007

• #11

Call the manufacturer and ask. Or check out this link: http://www.dfwstangs.net/tech/nostech.html

This is the link I used years ago when I had the gas on my car and when I switched to 30's. This is assumming you have an NOS 5115 dry kit?

 

C

cjnecessary

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Mar 13, 2006

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richmond,in

Apr 12, 2007

#12

• Apr 12, 2007

• #12

yeah thats what I have.

 

jimdrechsler

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Jun 29, 2006

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Apr 12, 2007

#13

• Apr 12, 2007

• #13

Grn92LX said:

Call the manufacturer and ask. Or check out this link: http://www.dfwstangs.net/tech/nostech.html

This is the link I used years ago when I had the gas on my car and when I switched to 30's. This is assumming you have an NOS 5115 dry kit?

Click to expand...

does the 5115 kit come with all the sims they are talking about and tee's on that link you have there? i dont reember mine having all the extras to do that. i think i am running a 100 shot now, but would like to go up if i can. are they easy to add? anyone have pics as to what they are talking about and how to do it?
thanks

 

C

cjnecessary

Member

Mar 13, 2006

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richmond,in

Apr 15, 2007

#14

• Apr 15, 2007

• #14

no that kit does'nt come w/ all the extras I had to order it through summit racing the part number for the shims is NOS-17933NOS it's like ten bucks for the shims then you have to get the jets they are like 7 or 8 bucks.