BUILT NPI DYNO NUMBERS!!!!
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mustangman9812
10 Year Member
BurningRubber
10 Year Member
- Dec 6, 2004
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Well not to be mean but 300 RWHP N/A with NPI heads was done a long time ago. Johnny Langton made over 300 RWHP N/A with NPI heads about 5 - 6 years ago and he did it with an auto to boot. Last time I talked to him, his best was 12.16 @ 111 MPH with a 3700 pound TBird.
EPIK
Member
thanks guys 
the idle is still a little funny, it want's to surge, and hang a little, but he said he will get everthing staightend out in the final tune.......
the idle is still a little funny, it want's to surge, and hang a little, but he said he will get everthing staightend out in the final tune.......
CobraRed_96_GT
Active Member
CobraRed_96_GT
Active Member
Oh, i was under the impression he used a Mark engine's internals to bump compression and that they were stock.
I dunno...I'm just going by what's in his sig? Besides, I didn't think you could use 2V heads with 4V pistons? I thought there were piston to valve clearance issues....although I could be wrong? 
CobraRed_96_GT
Active Member
I just went back to his old thread:I dunno...I'm just going by what's in his sig? Besides, I didn't think you could use 2V heads with 4V pistons? I thought there were piston to valve clearance issues....although I could be wrong?
Those Mark pistons are what gave him the compression. The rods are rated to 600hp.
I dunno...I'm just going by what's in his sig? Besides, I didn't think you could use 2V heads with 4V pistons? I thought there were piston to valve clearance issues....although I could be wrong?
yeah, it has '98 4v pistons in it, (2.6cc dish), and the rods, there forged i beams, sort of overkill, but i pretty much stole them.........
I'm not saying that this was the first time it's been done, I'm simply stoked that "normal" people are realizing these gains and doing so with "normal people" budgets.
People were running 14's with stock Non-PI GTs for years, but they were so few and far between that the general concensus, even in the supposed tuner mags, was that they were 15 second dogs. I think its safe to say that the same concensus was reached with NPI 4.6s. They were simply too expensive to build too 300rwhp and beyond.
Just one more notch on the belt for the NPI castings.
02nightmaregt
To hell with your Mustang, I want to see your HOG!
OUTSTANDING!!! Damn that sucks my internet was down all weekend, i wish i could've jumped into this thread a little sooner. Awsome job dude
REALLY good numbers. I was all like "Dayum, he mad some awesome numbers", when i saw that.
REALLY good numbers. I was all like "Dayum, he mad some awesome numbers", when i saw that.
OUTSTANDING!!! Damn that sucks my internet was down all weekend, i wish i could've jumped into this thread a little sooner. Awsome job dude
haha, thanks man, hopfully within the next 2 weeks i will be posting even better numbers once i get some 24lb injectors and the final tune
westgastang5.0Coyote
15 Year Member
numbers
Those are some awesome numbers you posted! Let us know when you get the final tune. You've definetely convinced me about the npi heads because I was going to go with the pi heads. It's safe to say I won't now. Awesome job man!
Those are some awesome numbers you posted! Let us know when you get the final tune. You've definetely convinced me about the npi heads because I was going to go with the pi heads. It's safe to say I won't now. Awesome job man!
