What injectors with this combo?

chris91LX · 12-12-2001, 11:46 PM

I'm planning on going with AFR 165 heads, the Edelbrock intake and maybe the Comp Cams XE266HR cam with 1.7 ratio Roller Rockers and I was wondering if I should go with the 24lb or 30lb injectors. When I rebuild the engine in a year or so I plan to go with a 331 or 347 stroker and I want to replace as few items as possible. I already have the 30lb tube for my 73mm MAS so I wouldn't have to replace that if I can go with the 30lb injectors. But I might be better off going with a bigger MAS anyway. I also have both a 65mm and a 70mm throttle body, should I stick with the 65mm or throw on the 70mm, with these heads, intake and cam? Thaks for any info.....

Unit 5302 · 12-13-2001, 12:42 AM

So you're lookin at .580/.590 lift. 216/224 @.500 plus a little.

If you are planning on a stroker and you want to keep the cam, why not get something with a little more duration and not so much lift? The extra cubes will make the additional duration less of a problem, and you've got to be losing a ton of power lifting the crap outta those valves. How much flycutting will that cam/rocker choice require?

You could run 30lb injectors on your combo okay, but yes, an upgraded MAF beyond the 73mm would be advised, also the 70mm T/B should go on there since you are N/A.

Unit 5302 · 12-13-2001, 12:49 AM

for those wanting to know

XE266HR

.544/.555 216*/224*@ .500 LSA 112, 266*/282*(I think)

Those are the specs with 1.6:1 Rockers.

chris91LX · 12-13-2001, 10:27 AM

The guy I talked to at AFR actually suggested the cam. I don't know diddly about cam science so I will rely heavily on whatever advice I can get. I'm not sure the guy at AFR understood where I wanted to go with my car. I'm going to stay street legal, emissions and all, and I want a fairly smooth idle. I'll go with a differen't cam or 1.6 rockers because I do not want to have to fly cut the pistons.

exgmguy · 12-14-2001, 02:10 PM

30's will work fine. Your WOT fuel pressure will just have to be set around 32 psi.

Stang Runner · 12-14-2001, 05:42 PM

What AFR heads are you getting??? 165?? if so the Springs that come with it are Only good to .550 lift so if you do more you need better springs!!!

Stang Runner · 12-14-2001, 05:47 PM

What AFR heads are you getting??? 165?? if so the Springs that come with it are Only good to .550 lift so if you do more you need better springs!!!

gtsr515 · 12-14-2001, 08:33 PM

Definetly get the 30lb injectors, they leave some room to build on...just like you plan on doing. When naturally aspirated go with the bigger MAF and the 70mm T.B.

chris91LX · 12-16-2001, 07:47 PM

Thanks for the tips guys. Looks like I'll be going with the 30# injectors and a new MAS, maybe that new C & L 76mm? Or should I jump to the 80mm?

Stang Runner · 12-16-2001, 08:17 PM

You might want to get 185's with the restroked to a 347

chris91LX · 12-16-2001, 11:14 PM

The guy at AFR said it would be no problem for them to machine the 165's I buy now to a 185 later when I stroke my motor. Which is another reason I'm leaning toward the AFR's.

Stang Runner · 12-16-2001, 11:28 PM

Sweet I did not think of that!!!!!! I might have to some time too.

12-12-2001, 11:46 PM	#1
chris91LX Registered Member Join Date: Oct 1998 Location: Suburban Chicago, Hanover Park Posts: 695	What injectors with this combo? I'm planning on going with AFR 165 heads, the Edelbrock intake and maybe the Comp Cams XE266HR cam with 1.7 ratio Roller Rockers and I was wondering if I should go with the 24lb or 30lb injectors. When I rebuild the engine in a year or so I plan to go with a 331 or 347 stroker and I want to replace as few items as possible. I already have the 30lb tube for my 73mm MAS so I wouldn't have to replace that if I can go with the 30lb injectors. But I might be better off going with a bigger MAS anyway. I also have both a 65mm and a 70mm throttle body, should I stick with the 65mm or throw on the 70mm, with these heads, intake and cam? Thaks for any info..... __________________ My Ford Club http://www.midwestfords.org/ Best time N/A 12.9 @ 107 1.711 60' 125 shot - 12.04 @ 113 1.59 60'

12-13-2001, 10:27 AM	#4
chris91LX Registered Member Join Date: Oct 1998 Location: Suburban Chicago, Hanover Park Posts: 695	The guy I talked to at AFR actually suggested the cam. I don't know diddly about cam science so I will rely heavily on whatever advice I can get. I'm not sure the guy at AFR understood where I wanted to go with my car. I'm going to stay street legal, emissions and all, and I want a fairly smooth idle. I'll go with a differen't cam or 1.6 rockers because I do not want to have to fly cut the pistons. Last edited by chris91LX; 12-13-2001 at 10:33 AM..

12-14-2001, 02:10 PM	#5
exgmguy Registered Member Join Date: Feb 1999 Location: Utica, Michigan Posts: 2,631	30's will work fine. Your WOT fuel pressure will just have to be set around 32 psi. __________________ 1988 Mustang GT stock bottom 302, C4 10.9 @ 128 with 8 psi of Novi 1000 boost!----STOLEN 1989 Mustang notchback Warmed up 306 with a Procharger.

12-14-2001, 05:42 PM	#6
Stang Runner Registered Member Join Date: Jun 1999 Location: Walker, MI, USA Posts: 1,202	What AFR heads are you getting??? 165?? if so the Springs that come with it are Only good to .550 lift so if you do more you need better springs!!! __________________ Engine: steel mounts, Under drive pulleys, K&N, GT-40 Intake ported Lower, No power steering, No A/C, Mac cold intake, 65MM TB, 255 Fuel pump, 24's, AFR 165 58cc, Rocker Arms 1.7with the stock Cam, 1 5/8 short headers, offRoad X-pipe Drive Train: 3.55, T-5 with a Pro 5.0 shifter 12.656@107.71MPH See It at www.T-racing.com/mustang.htm

12-14-2001, 05:47 PM	#7
Stang Runner Registered Member Join Date: Jun 1999 Location: Walker, MI, USA Posts: 1,202	What AFR heads are you getting??? 165?? if so the Springs that come with it are Only good to .550 lift so if you do more you need better springs!!! __________________ Engine: steel mounts, Under drive pulleys, K&N, GT-40 Intake ported Lower, No power steering, No A/C, Mac cold intake, 65MM TB, 255 Fuel pump, 24's, AFR 165 58cc, Rocker Arms 1.7with the stock Cam, 1 5/8 short headers, offRoad X-pipe Drive Train: 3.55, T-5 with a Pro 5.0 shifter 12.656@107.71MPH See It at www.T-racing.com/mustang.htm

12-13-2001, 12:42 AM	#2
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	So you're lookin at .580/.590 lift. 216/224 @.500 plus a little. If you are planning on a stroker and you want to keep the cam, why not get something with a little more duration and not so much lift? The extra cubes will make the additional duration less of a problem, and you've got to be losing a ton of power lifting the crap outta those valves. How much flycutting will that cam/rocker choice require? You could run 30lb injectors on your combo okay, but yes, an upgraded MAF beyond the 73mm would be advised, also the 70mm T/B should go on there since you are N/A.

12-13-2001, 12:49 AM	#3
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	for those wanting to know XE266HR .544/.555 216/224@ .500 LSA 112, 266/282(I think) Those are the specs with 1.6:1 Rockers.

12-14-2001, 08:33 PM	#8
gtsr515 Registered Member Join Date: Nov 2001 Location: Sunny, Hot, Sebring, Florida Posts: 725	Definetly get the 30lb injectors, they leave some room to build on...just like you plan on doing. When naturally aspirated go with the bigger MAF and the 70mm T.B. __________________ Remember...2nd place is 1st place for losers!

12-16-2001, 07:47 PM	#9
chris91LX Registered Member Join Date: Oct 1998 Location: Suburban Chicago, Hanover Park Posts: 695	Thanks for the tips guys. Looks like I'll be going with the 30# injectors and a new MAS, maybe that new C & L 76mm? Or should I jump to the 80mm?

12-16-2001, 08:17 PM	#10
Stang Runner Registered Member Join Date: Jun 1999 Location: Walker, MI, USA Posts: 1,202	You might want to get 185's with the restroked to a 347 __________________ Engine: steel mounts, Under drive pulleys, K&N, GT-40 Intake ported Lower, No power steering, No A/C, Mac cold intake, 65MM TB, 255 Fuel pump, 24's, AFR 165 58cc, Rocker Arms 1.7with the stock Cam, 1 5/8 short headers, offRoad X-pipe Drive Train: 3.55, T-5 with a Pro 5.0 shifter 12.656@107.71MPH See It at www.T-racing.com/mustang.htm

12-16-2001, 11:14 PM	#11
chris91LX Registered Member Join Date: Oct 1998 Location: Suburban Chicago, Hanover Park Posts: 695	The guy at AFR said it would be no problem for them to machine the 165's I buy now to a 185 later when I stroke my motor. Which is another reason I'm leaning toward the AFR's.

12-16-2001, 11:28 PM	#12
Stang Runner Registered Member Join Date: Jun 1999 Location: Walker, MI, USA Posts: 1,202	Sweet I did not think of that!!!!!! I might have to some time too. __________________ Engine: steel mounts, Under drive pulleys, K&N, GT-40 Intake ported Lower, No power steering, No A/C, Mac cold intake, 65MM TB, 255 Fuel pump, 24's, AFR 165 58cc, Rocker Arms 1.7with the stock Cam, 1 5/8 short headers, offRoad X-pipe Drive Train: 3.55, T-5 with a Pro 5.0 shifter 12.656@107.71MPH See It at www.T-racing.com/mustang.htm

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