Injectors and WHP

trinity_gt

10 Year Member

Jan 31, 2003

3,125

81

99

Canada

Feb 1, 2006

#1

• Feb 1, 2006

• #1

When last dyno'd my 02 GT made a decent 268rwHP on a Dynojet. Over the winter, I've purchased a set of Comp Cams 262AHs and am needless to say hoping for a bit more output from it.

The car still has the factory 19# injectors. 268rwHP works out to something just over 300HP at the crankshaft which, I've read, is about the max capacity for 19# injectors. With the addition of the cams am I going to need to switch to 24# units?

 

Built98GT

New Member

Oct 17, 2005

211

0

0

OKC

Feb 1, 2006

#2

• Feb 1, 2006

• #2

You dont have to but I would recommend it.I have some #30 lb injectors for sale on ebay right now that you could put in.
http://cgi.ebay.com/ebaymotors/ws/e...=8034925606&rd=1&sspagename=STRK:MESE:IT&rd=1

 

B

BLKsteeda

New Member

Jul 12, 2004

236

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0

Anywhere

Feb 2, 2006

#3

• Feb 2, 2006

• #3

You don't need to...I have every bolt on plus cams and ported heads...I make 310rwhp and 325rwtq...everything was installed and tuned by Steeda and during the recent head install and re-tune Steeda said that the 19# were flowing plenty for the hp my car makes.

 

trinity_gt

10 Year Member

Jan 31, 2003

3,125

81

99

Canada

Feb 3, 2006

#4

• Feb 3, 2006

• #4

Excellent. Thanks for the help.

 

BaconBits

New Member

Apr 4, 2005

84

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0

Feb 3, 2006

#5

• Feb 3, 2006

• #5

What are the basic HP limits of the different injector sizes? Is there some kind of a chart out there for the 4.6l engine? I've searched around and haven't found anything.

 

mogs01gt

Founding Member

Jul 22, 2002

3,113

30

119

Ohio

Feb 3, 2006

#6

• Feb 3, 2006

• #6

I would recommend going with a larger fuel pump though.

 

B

BLKsteeda

New Member

Jul 12, 2004

236

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Anywhere

Feb 3, 2006

#7

• Feb 3, 2006

• #7

I still have my stock fuel pump as well

 

jstreet0204

Active Member

Jun 26, 2003

939

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36

Winston Salem, NC

Feb 3, 2006

#8

• Feb 3, 2006

• #8

You have to remember, a naturally aspirated engine can go much farther on the same fuel system compoents because of the differences in the bsfc, and air/fuel ratios.

 

C

Chris00GT

Founding Member

Jan 28, 2001

275

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16

York Springs, PA

Feb 5, 2006

#9

• Feb 5, 2006

• #9

I made 280rwhp N/A with stock 19lb fuel injectors with more room still left in them. I've seen cars with 300rwhp with stock injectors. I'd invest the money into something else!!