dyno results

speadfreak

New Member

Oct 13, 2005

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Apr 9, 2006

#21

• Apr 9, 2006

• #21

795.0pacecar said:

I think something is up with the MAF. Is it calibrated for 30lb injectors? Who makes it? If you have to run 50psi to get a decent A/F ratio with 30lb injectors somethings going on with the duty cycle of the injectors. Have you thought about getting a tune?

Your car should be making quite a bit more than that, my engine makes more than that with thumper heads, speed density, and 19lb injectors.

Click to expand...

how much more? and what kind of dyno was it one? thanks

 

795.0pacecar

lover of pudgy polygamists

Jul 11, 2003

480

0

17

Senoia, GA

Apr 9, 2006

#22

• Apr 9, 2006

• #22

Dynojet. 261rwhp and 303rwtq. Not much more power than you, but my heads aren't near as good as yours.

 

N8Miller

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

Founding Member

Jul 26, 2000

2,661

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Kingston, PA, USA

Apr 9, 2006

#23

• Apr 9, 2006

• #23

ok, the 19s wouild be border line. I would swap them out for a set of 24s and matching 75mm MAF. if anything, i would get rid of that intake and get an RPM, the cobra is prolly holding you back, even ported. The RPM would be a better choice to match those heads and would prolly make more power than your that crazy low 4600rpms!

302rollinhard: these parts are hardly "big" by todays standards!!!!

 

airbag

New Member

Aug 16, 2005

49

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hebron, indiana

Apr 9, 2006

#24

• Apr 9, 2006

• #24

the car made peak hp at 5,250 but that is still low. cant see buying new injectors for the money. my maf is pro-m 1 year old (calibrated for 30's). the car runs great just low hp #'s. hasn't been nice enough for the track in indiana. all comments greatly appreciated. thanx.

 

N8Miller

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

Founding Member

Jul 26, 2000

2,661

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Kingston, PA, USA

Apr 9, 2006

#25

• Apr 9, 2006

• #25

airbag said:

the car made peak hp at 5,250 but that is still low. cant see buying new injectors for the money. my maf is pro-m 1 year old (calibrated for 30's). the car runs great just low hp #'s. hasn't been nice enough for the track in indiana. all comments greatly appreciated. thanx.

Click to expand...

personally, i would suggest getting a used personal tuner (PMS, tweecer) and find out what is actully going on. I woiuld have expected to see numbers in the very high 200s or even the 300 mark.

 

tmoss

Gettin Wired

Founding Member

Jun 28, 2001

7,153

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128

Saint Louis, MO

Apr 9, 2006

#26

• Apr 9, 2006

• #26

The photo is totaly out of focus, but you can see the low-lower mid range is soft - the curve is normally convex - yours is concave.

 

airbag

New Member

Aug 16, 2005

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hebron, indiana

Apr 9, 2006

#27

• Apr 9, 2006

• #27

tmoss looking for your best opinion?

 

J

jjd975

Founding Member

Jul 17, 2000

4,236

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louisville,kentucky

Apr 9, 2006

#28

• Apr 9, 2006

• #28

The tune really sounds odd to me. I have never seen aluminum heads like so little timing. Seems most like 15-18*. I know my Edelbrock like 17-19.

Fuel pressure sounds off the charts.

Cant say if its hurting or not, but thats a big cam for those parts.

 

tmoss

Gettin Wired

Founding Member

Jun 28, 2001

7,153

32

128

Saint Louis, MO

Apr 10, 2006

#29

• Apr 10, 2006

• #29

My opinion is there is more to this combo than you are getting - but I don't have a crystal ball as to why your not getting there.......

 

M

my289eatsrice

New Member

Nov 11, 2005

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Woodstock, CT

Apr 10, 2006

#30

• Apr 10, 2006

• #30

Wow, I'm running a very similar combo. DSS 306 Bullet, Twisted wedge heads, GT-40 intake, B-cam, 19lb injectors, and all other boltons. My car dyno'd at 265hp/266tq to the wheels, and my car was running rich w/ the 19lb stockers at 40 pounds of fuel pressure and 190lph pump. My motor has about 40k on in, and its wierd, because my torque curve is no existant. It is completely flat from about 2g till 4.5 g, w/ no peak, which the dyno guy couldn't figure out. Anyways, mine was running rich, stock computer, exhaust leak(header gasket), and burns a little oil, only rev it 5500 on the dyno (my car redlines just shy of 7g's)and it still make more power than yours. I think you just have a horribly mismatch combo. The first thing I would do is drop the 30's and get 19's or even 24s. Then get rid of your cobra intake(they suck), just like my gt-40 intake which chokes the hell outta my motor. I'm switching to a TFS track heat, and a stage 2 cam. With these changes, along w/ new rings, I should be in the 290-300 hp range. You just need to better plan out your combo.

 

90lxcoupe

20+ Year Stangneter

Oct 7, 2003

3,596

350

134

Apr 10, 2006

#31

• Apr 10, 2006

• #31

With thoes heads and that cam that motor should pull right to the rev limiter... my car without the blower made 265hp and 290 lb/ft with the hp still climbing at 6000 rpm's try some 24 pounders and see what happens.

Also are you using the right spark plugs? I ask because when i bought my car i rove it for like a year and i thought it ran great, then i took it to the dyno where the tuner informed me that i had the wrong plugs in the car... and i had no idea, he didnt even make a pass without swapping those out and it felt like a new car after that

 

airbag

New Member

Aug 16, 2005

49

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hebron, indiana

Apr 10, 2006

#32

• Apr 10, 2006

• #32

anyone else?

 

fidstang

New Member

Jul 19, 2005

307

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South Lansing

Apr 10, 2006

#33

• Apr 10, 2006

• #33

Get a new tuner and get it redone. The 30lbs units should be fine. All of the injector ramp and timing is done on your ECM. Their is no need for the fuel pressure to be set that high with the 30lb units. So get a tuner from a different shop that is known and good with the foxes N/A.

 

vikingpower

New Member

Dec 6, 2004

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CWU Ellensburg, WA

Apr 10, 2006

#34

• Apr 10, 2006

• #34

What about the valvesprings, how old are they? are they rated for the lift/RPM range of the X cam? Looks to me like maybe your valves are floating and/or that cam is slighty too big for your heads and intake.
Also, I just put 30#'s on my car (from 19's) when I put my cam in, runs a helluva lot better now, minus the surging of course... I would estimate my peak HP around 6000 rpms after running the engine up out on some country roads around here. BTW, heres my top-end setup: 1 5/8 LT's, portmatched&polished runners Typhoon, TFS 1 cam, stage 1 ported TW heads.

 

gcwh02

New Member

Jun 20, 2005

515

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pottstown, PA

Apr 10, 2006

#35

• Apr 10, 2006

• #35

Definately get rid of the 30's, go 24's, get your MAF calibrated for it. We know the Cobra intake is choking you some, but you should still have more horse than that. I.E. Paul Perreca on here has a similar combo with same heads except with the e303 and 24lbers and pushes 300. Im sure the cam is a little mismatched and is totally up to you if you want to go custom or I would suggest TFS stage 1. Second, Fuel pressure for those 30's are insanely too high. That FP is too high for even 24's. Let us know what you want to do...