Injector question?!?!

PowerSlideGT · 09-20-2004, 10:38 AM

Hey guys,

Okay, i jus bought a gt-40 intake. And im going to put a 70mm throttle body on it. i need to know what kind of fuel injectors im going to need. Like what lbs. The motor is going to be complete roller, flatt top, roush 202 heads, which brings me to this. Since the motor will have roller rockers does that mean i need tall boy valve covers and if so where can i get them for an efi motor i cant find them for an efi. if you need more information then tell me. What size mass air should i get as well?

Dark_5.0 · 09-20-2004, 10:44 AM

We have an extremely similar set-up and I am running 24 # injectors with a pro-m 73 mm mass air sensor.

Stock injectors will work fine but 24 # injectors are better suited for high HP 302's.

Swarzkopf1 · 09-20-2004, 01:30 PM

The stock injectors would be fine, however, like Dark_5.0 said, if you have the extra money upgrading to #24s would be great.

If you keep the stock injectors, make sure you use a high volume fuel pump and fuel pressure regulator, so you can make up for injector size with fuel pressure. Really depends on how much power your engine is capable of making.

The bigger the better for the MAF, the Pro-M 75mm's are pretty economically priced and perform well, I have one on my car.

No idea about the valve covers.

Hope that helped a little.

Dark_5.0 · 09-20-2004, 03:43 PM

I have 1.6 roller rockers under stock valve covers if that helps any.

94snake · 09-20-2004, 04:18 PM

i have crane 1.7s under my factory valve covers!

USMC302 · 09-21-2004, 01:09 PM

The stock valve covers should work ok if your GT is an 87-93, if it's the 94-95 I dunno.

Trickflow sells some nice valve covers that are both tall and short for the SBF EFI.

Trickflow Valve Covers

Just click on Valve covers and scroll down.

Good Luck!

PowerSlideGT · 09-21-2004, 08:25 PM

Im going to get 24 lbs injectors, but should i go to a 75 mass and a 75mm thorttle? its a 87 gt-top. and probably 1.6 roller rockers, I hope this motor perduces the hp i am needing, Im wanting about 400hp or a lil more.

Swarzkopf1 · 09-22-2004, 08:06 AM

I think 75mm might be one size too big for the Tbody, though it shouldn't make that much of a difference. I'd probably go with 70mm.

88fivepointoh · 09-23-2004, 04:10 PM

70MM is fine... 24's are great and I run 1.6's under my stock " polished " valve covers..

Fat0eknee · 09-23-2004, 06:02 PM

i think these look nice
http://www.jegs.com/cgi-bin/ncommerc...60&prmenbr=361

codybear · 09-27-2004, 04:52 PM

I like These ones

Fat0eknee · 09-27-2004, 05:55 PM

yeah i also like the price on those too lol

codybear · 09-27-2004, 07:52 PM

I don't care for the price either but I am still getting them for looks alone!!!LOL

09-20-2004, 10:38 AM	#1
PowerSlideGT Registered Member Join Date: Apr 2004 Location: Tecumseh Posts: 165	Injector question?!?! Hey guys, Okay, i jus bought a gt-40 intake. And im going to put a 70mm throttle body on it. i need to know what kind of fuel injectors im going to need. Like what lbs. The motor is going to be complete roller, flatt top, roush 202 heads, which brings me to this. Since the motor will have roller rockers does that mean i need tall boy valve covers and if so where can i get them for an efi motor i cant find them for an efi. if you need more information then tell me. What size mass air should i get as well? __________________ 1988 mustang gt t-top svo alum. Heads, comp cam rockers, e303 cam, Mass air, BBK cold air induction, BBK throttle body, gt-40 intake 1 inch spacer, Alum. drive shaft, world class 5 speed, 3.55 gear rear end, drag front springs.

09-20-2004, 01:30 PM	#3
Swarzkopf1 Registered Member Join Date: Jul 2004 Posts: 18	!! The stock injectors would be fine, however, like Dark_5.0 said, if you have the extra money upgrading to #24s would be great. If you keep the stock injectors, make sure you use a high volume fuel pump and fuel pressure regulator, so you can make up for injector size with fuel pressure. Really depends on how much power your engine is capable of making. The bigger the better for the MAF, the Pro-M 75mm's are pretty economically priced and perform well, I have one on my car. No idea about the valve covers. Hope that helped a little.

09-20-2004, 03:43 PM	#4
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	I have 1.6 roller rockers under stock valve covers if that helps any. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

09-21-2004, 01:09 PM	#6
USMC302 Registered Member Join Date: Apr 2001 Location: Gallatin, Tn Posts: 1,326	The stock valve covers should work ok if your GT is an 87-93, if it's the 94-95 I dunno. Trickflow sells some nice valve covers that are both tall and short for the SBF EFI. Trickflow Valve Covers Just click on Valve covers and scroll down. Good Luck! __________________

09-21-2004, 08:25 PM	#7
PowerSlideGT Registered Member Join Date: Apr 2004 Location: Tecumseh Posts: 165	Im going to get 24 lbs injectors, but should i go to a 75 mass and a 75mm thorttle? its a 87 gt-top. and probably 1.6 roller rockers, I hope this motor perduces the hp i am needing, Im wanting about 400hp or a lil more. __________________ 1988 mustang gt t-top svo alum. Heads, comp cam rockers, e303 cam, Mass air, BBK cold air induction, BBK throttle body, gt-40 intake 1 inch spacer, Alum. drive shaft, world class 5 speed, 3.55 gear rear end, drag front springs.

09-20-2004, 10:44 AM	#2
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	We have an extremely similar set-up and I am running 24 # injectors with a pro-m 73 mm mass air sensor. Stock injectors will work fine but 24 # injectors are better suited for high HP 302's. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

09-20-2004, 04:18 PM	#5
94snake Registered Member Join Date: Nov 2002 Location: Panama City Fl. Posts: 152	i have crane 1.7s under my factory valve covers!

09-22-2004, 08:06 AM	#8
Swarzkopf1 Registered Member Join Date: Jul 2004 Posts: 18	!! I think 75mm might be one size too big for the Tbody, though it shouldn't make that much of a difference. I'd probably go with 70mm.

09-23-2004, 04:10 PM	#9
88fivepointoh Registered Member Join Date: Aug 2002 Location: Rochester Posts: 553	70MM is fine... 24's are great and I run 1.6's under my stock " polished " valve covers..

09-23-2004, 06:02 PM	#10
Fat0eknee I'm slow ...I know. Join Date: Dec 2003 Location: houston Posts: 518	i think these look nice http://www.jegs.com/cgi-bin/ncommerc...60&prmenbr=361

09-27-2004, 04:52 PM	#11
codybear Registered Member Join Date: Sep 2003 Posts: 63	I like These ones

09-27-2004, 05:55 PM	#12
Fat0eknee I'm slow ...I know. Join Date: Dec 2003 Location: houston Posts: 518	yeah i also like the price on those too lol