speadfreak
New Member
- Oct 13, 2005
- 118
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dyno results
- Thread starter airbag
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795.0pacecar
lover of pudgy polygamists
Dynojet. 261rwhp and 303rwtq. Not much more power than you, but my heads aren't near as good as yours.
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!!!!
302rollinhard: these parts are hardly "big" by todays standards!!!!
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.
airbag said:
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.
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.
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.......
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.
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
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
fidstang
New Member
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
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.
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
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...
